National Library of Energy BETA

Sample records for tidal wetlands coastal

  1. Virginia Wetlands Report Tools of the Tidal Shoreline

    E-Print Network [OSTI]

    Virginia Wetlands Report Tools of the Tidal Shoreline Management Trade Friday, October 13, 2006) technology with digital aerial photographs and the power of the Internet. They are accessible from desktop Comprehensive Coastal Inventory has produced several GIS tools for the tidal shoreline management trade

  2. TIDAL FRESHWATER WETLANDS OF THE MID-ATLANTIC AND

    E-Print Network [OSTI]

    Fabrizio, Mary C.

    Chapter 14 TIDAL FRESHWATER WETLANDS OF THE MID-ATLANTIC AND SOUTHEASTERN UNITED STATES James E Jensen& Aat Barendregt 7. Animal communities in North American tidal fresh- water wetlands Christopher W Struyf, Tom Maris, Tom Cox & Patrick Meire 12. Carbon flows, nutrient cycling, and food webs in tidal

  3. The Virginia Wetlands Report

    E-Print Network [OSTI]

    that impact tidal wetlands, subaqueous bottom and coastal pri- mary sand dunes and beaches. Each project The VIMS Center for Coastal Re sources Management has main- tained a database since 1988 to track authorized in 2003. The permitted impacts include 24 acres of vegetated tidal wetlands and 112 acres of non-vegetated

  4. A Rapid Assessment Method Examining the Ecological Health of Tidal Marine Wetlands in Galveston Bay, Texas 

    E-Print Network [OSTI]

    Staszak, Lindsey Ann

    2011-10-21

    Wetlands are one of the most productive ecosystems in the world, housing diverse biota and serving important functions as nursery habitat and feeding grounds. However, nearly 70% of coastal wetlands, including 21% of the salt marshes in Texas, have...

  5. Dynamics of carbon sequestration in a coastal wetland using radiocarbon measurements

    E-Print Network [OSTI]

    Dynamics of carbon sequestration in a coastal wetland using radiocarbon measurements Yonghoon Choi1. Wang (2004), Dynamics of carbon sequestration in a coastal wetland using radiocarbon measurements carbon cycle. However, the dynamics of carbon (C) cycling in coastal wetlands and its response to sea

  6. Saltwater Incursion into Micro Tidal Wetlands: Case Studies from Matagorda, Texas and Humacao, Puerto Rico 

    E-Print Network [OSTI]

    Colon, Ricardo J.

    2013-08-27

    Global climate change threatens the survival of microtidal wetlands by altering fundamental hydrological aspects such as precipitation patterns and tidal exchange. The combination of these stressors results in increased flooding period and soil...

  7. Virginia Wetlands Report Center for Coastal Resources Management www.ccrm.vims.edu

    E-Print Network [OSTI]

    to support new protection for coastal sand dunes and non-vegetated wetlands. The regulatory program was alsoVirginia Wetlands Report Center for Coastal Resources Management www.ccrm.vims.edu Volume 30, Issue. This process continues to be as important now and for the future of the Commonwealth's coastal resources

  8. Nekton Density Patterns in Tidal Ponds and Adjacent Wetlands Related to Pond Size and Salinity

    E-Print Network [OSTI]

    Nekton Density Patterns in Tidal Ponds and Adjacent Wetlands Related to Pond Size and Salinity pond sizes (diameter 750 m=large), and two habitat types (pond, adjacent marsh) in the Barataria Bay Estuary, Louisiana. Nekton assemblages of ponds and the adjacent marsh

  9. The effect of bioremediation on microbial populations in an oil-contaminated coastal wetland 

    E-Print Network [OSTI]

    Townsend, Richard Todd

    1999-01-01

    A series of controlled, crude oil applications was carried out in a Texas coastal wetland near the Houston Ship Channel to determine the effectiveness of bioremediation in these sensitive areas. The first application, conducted in 1996...

  10. Application of conditional sampling for measuring ecosystem-scale carbon dioxide exchange in coastal wetlands 

    E-Print Network [OSTI]

    Cobos, Douglas Russell

    1999-01-01

    Carbon dioxide exchange rate (CER) is an indicator of an ecosystem's response to changing environmental conditions. Long-term measurements of CO? exchange between coastal wetlands and the atmosphere will improve our understanding of daily...

  11. Covariation of coastal water temperature and microbial pollution at interannual to tidal periods

    E-Print Network [OSTI]

    Winant, Clinton D.

    Covariation of coastal water temperature and microbial pollution at interannual to tidal periods. G. Monismith (2004), Covariation of coastal water temperature and microbial pollution at interannual the relationship between water temperature and fecal pollution in the surf zone at Huntington and Newport Beach

  12. Soil Organic Matter of Natural and Restored Coastal Wetland Soils in Southern California

    E-Print Network [OSTI]

    Elgin, Barbara K.

    2012-01-01

    year record of carbon sequestration from a coastal lagoonR.E. , Milarn, C.S. 2012. Carbon sequestration and SedimentJ.C. 2003. Global carbon sequestration in tidal saline

  13. A Synthesis of Environmental and Plant Community Data for Tidal Wetland Restoration Planning in the Lower Columbia River and Estuary

    SciTech Connect (OSTI)

    Diefenderfer, Heida L.; Borde, Amy B.; Cullinan, Valerie I.

    2013-12-01

    This report reanalyzes and synthesizes previously existing environmental and plant community data collected by PNNL at 55 tidal wetlands and 3 newly restored sites in the lower Columbia River and estuary (LCRE) between 2005 and 2011. Whereas data were originally collected for various research or monitoring objectives of five studies, the intent of this report is to provide only information that will have direct utility in planning tidal wetland restoration projects. Therefore, for this report, all tidal wetland data on plants and the physical environment, which were originally developed and reported by separate studies, were tabulated and reanalyzed as a whole. The geographic scope of the data collected in this report is from Bonneville Lock and Dam to the mouth of the Columbia River

  14. Vegetation succession and carbon sequestration in a coastal wetland in northwest Florida: Evidence from carbon isotopes

    E-Print Network [OSTI]

    Vegetation succession and carbon sequestration in a coastal wetland in northwest Florida: Evidence from carbon isotopes Yonghoon Choi and Yang Wang Department of Geological Sciences, Florida State. Measurements of stable carbon isotopic ratios as well as carbon (C), nitrogen (N), and phosphorus (P) contents

  15. Transplanting native dominant plants to facilitate community development in restored coastal plain wetlands.

    SciTech Connect (OSTI)

    De Steven, Diane; Sharitz, Rebecca R.

    2007-12-01

    Abstract: Drained depressional wetlands are typically restored by plugging ditches or breaking drainage tiles to allow recovery of natural ponding regimes, while relying on passive recolonization from seed banks and dispersal to establish emergent vegetation. However, in restored depressions of the southeastern United States Coastal Plain, certain characteristic rhizomatous graminoid species may not recolonize because they are dispersal-limited and uncommon or absent in the seed banks of disturbed sites. We tested whether selectively planting such wetland dominants could facilitate restoration by accelerating vegetative cover development and suppressing non-wetland species. In an operational-scale project in a South Carolina forested landscape, drained depressional wetlands were restored in early 2001 by completely removing woody vegetation and plugging surface ditches. After forest removal, tillers of two rhizomatous wetland grasses (Panicum hemitomon, Leersia hexandra) were transplanted into singlespecies blocks in 12 restored depressions that otherwise were revegetating passively. Presence and cover of all plant species appearing in planted plots and unplanted control plots were recorded annually. We analyzed vegetation composition after two and four years, during a severe drought (2002) and after hydrologic recovery (2004). Most grass plantings established successfully, attaining 15%–85% cover in two years. Planted plots had fewer total species and fewer wetland species compared to control plots, but differences were small. Planted plots achieved greater total vegetative cover during the drought and greater combined cover of wetland species in both years. By 2004, planted grasses appeared to reduce cover of non-wetland species in some cases, but wetter hydrologic conditions contributed more strongly to suppression of non-wetland species. Because these two grasses typically form a dominant cover matrix in herbaceous depressions, our results indicated that planting selected species could supplement passive restoration by promoting a vegetative structure closer to that of natural wetlands.

  16. Modeling Tidal Stream Energy Extraction and its Effects on Transport Processes in a Tidal Channel and Bay System Using a Three-dimensional Coastal Ocean Model

    SciTech Connect (OSTI)

    Yang, Zhaoqing; Wang, Taiping; Copping, Andrea E.

    2013-02-28

    This paper presents a numerical modeling study for simulating in-stream tidal energy extraction and assessing its effects on the hydrodynamics and transport processes in a tidal channel and bay system connecting to coastal ocean. A marine and hydrokinetic (MHK) module was implemented in a three-dimensional (3-D) coastal ocean model using the momentum sink approach. The MHK model was validated with the analytical solutions for tidal channels under one-dimensional (1-D) conditions. Model simulations were further carried out to compare the momentum sink approach with the quadratic bottom friction approach. The effects of 3-D simulations on the vertical velocity profile, maximum extractable energy, and volume flux reduction across the channel were investigated through a series of numerical experiments. 3-D model results indicate that the volume flux reduction at the maximum extractable power predicted by the 1-D analytical model or two-dimensional (2-D) depth-averaged numerical model may be overestimated. Maximum extractable energy strongly depends on the turbine hub height in the water column, and which reaches a maximum when turbine hub height is located at mid-water depth. Far-field effects of tidal turbines on the flushing time of the tidal bay were also investigated. Model results demonstrate that tidal energy extraction has a greater effect on the flushing time than volume flux reduction, which could negatively affect the biogeochemical processes in estuarine and coastal waters that support primary productivity and higher forms of marine life.

  17. GROUNDWATER FLOW AND TRANSPORT MODELING Application to Submarine Groundwater Discharge, Coastal Wetland Hydrology, and Deep Well Injection

    E-Print Network [OSTI]

    Sukop, Mike

    GROUNDWATER FLOW AND TRANSPORT MODELING Application to Submarine Groundwater Discharge, Coastal, but is also lost to surface water drainage and potential submarine groundwater discharge. There are also to deal with issues such as submarine groundwater discharge and coastal wetland hydrology. SEAWAT also has

  18. Environmental links to interannual variability in shellfish toxicity in Cobscook Bay and eastern Maine, a strongly tidally mixed coastal region

    E-Print Network [OSTI]

    Thomas, Andrew

    Maine, a strongly tidally mixed coastal region Hannah M. Horecka, Andrew C. Thomas n , Ryan A. Weatherbee School of Marine Sciences, 5706 Aubert Hall, University of Maine, Orono, ME 04469, USA a r t i c l e i n f o Keywords: Harmful algal blooms Gulf of Maine Cobscook Bay Shellfish toxicity a b s t r a c

  19. Evaluation and integration of ancillary datasets for coastal wetland landcover classification using Landsat TM Imagery 

    E-Print Network [OSTI]

    Hinson, James Mithland

    1993-01-01

    Ancillary data were compared with ground-truth data for use in separating saline and fresh wetland-landcover classes exhibiting similar spectral signatures. Two ancillary datasets, United States Fish and Wildlife Service (USFWS) National Wetland...

  20. Southern/Northern California Coastal Processes Annotated Bibliography: Coast of California Storm and Tidal Waves Study

    E-Print Network [OSTI]

    US Army Corps of Engineers, Los Angeles District, Planning Division, Coastal Resources Branch

    1987-01-01

    vegetation has proved to be the most effective and efficient means of stabilizing coastal sand dunes.

  1. Analysis and interpretation of tidal currents in the coastal boundary layer

    E-Print Network [OSTI]

    May, Paul Wesley, 1950-

    1979-01-01

    Concern with the impact of human activities on the coastal region of the world's oceans has elicited interest in the so-called "coastal boundary layer"-that band of water adjacent to the coast where ocean currents adjust ...

  2. Southern/Northern California Coastal Processes Annotated Bibliography: Coast of California Storm and Tidal Waves Study

    E-Print Network [OSTI]

    US Army Corps of Engineers, Los Angeles District, Planning Division, Coastal Resources Branch

    1987-01-01

    tsunami generation, propagation, terminal effects, instrumentation, warning systems,early warning system. KEYWORDS: Coastal Processes tsunamisWarning System and a report of its operation during the tsunami

  3. Southern/Northern California Coastal Processes Annotated Bibliography: Coast of California Storm and Tidal Waves Study

    E-Print Network [OSTI]

    US Army Corps of Engineers, Los Angeles District, Planning Division, Coastal Resources Branch

    1987-01-01

    tsunami and slope stability studies at the site for the San Onofre Nucleartsunamis California, South Coast Region, Subregion VIII, Subregion IX San Onofre Nucleartsunamis, coastal structures, wave climate California, San Diego Region, Subregion X, Oceanside Cell San Onofre Nuclear

  4. Research papers Assessment of coastal density gradients near a macro-tidal estuary

    E-Print Network [OSTI]

    Polton, Jeff

    Oceanography Centre, Joseph Proudman Building, 6 Brownlow Street, Liverpool L3 5DA, UK a r t i c l e i n f o of a variety of factors ­ time and spatial (horizontal and vertical) scales are small, tidal currents factor, with wind forcing tending to reinforce it for wind speeds greater than 5­10 m sÀ1 . Near bed

  5. The Virginia Wetlands Report

    E-Print Network [OSTI]

    of Locally Important Wetlands Carl H. Hershner Editor's note: The Virginia Coastal Resources Management ............. 7 Peat: Processing and Potential for Restoration .................................. 9 Calendar and by the Virginia Coastal Resources Management Program of the Depart- ment of Environmental Quality through Grant

  6. Generalized Conceptual Models Wetlands Regional Monitoring Program

    E-Print Network [OSTI]

    to re-suspension of tidal flat sediments by wind-generated waves (Krone 1979, Schoellhamer and Burau Wetlands as Transitional Environments (larger arrows represent larger fluxes of materials or energy WETLAND ECOLOGY The evolution and natural maintenance of tidal wetlands depen

  7. will appear in Journal of Geophysical Research, 2001. Observations of turbulence in a tidal beam and across a coastal ridge

    E-Print Network [OSTI]

    Lien, Ren-Chieh

    1 will appear in Journal of Geophysical Research, 2001. Observations of turbulence in a tidal beam the turbulence kinetic energy dissipation rate exceeded 10-6 W kg-1 , and the diapycnal eddy diffusivity K varied by a factor of 100 with a semidiurnal tidal periodicity; the isopycnal displacement confirmed

  8. Organic Carbon and Disinfection Byproduct Precursor Loads from a Constructed, Non-Tidal Wetland in California's Sacramento–San Joaquin Delta

    E-Print Network [OSTI]

    Fleck, Jacob A.; Fram, Miranda S.; Fujii, Roger

    2007-01-01

    California District Sacramento Laboratory - Determination offrom agricultural peat soils, Sacramento-San Joaquin Delta,wetland on Twitchell Island, Sacramento-San Joaquin Delta,

  9. The Influence of Coastal Wetlands on Hurricane Surge and Damage with Application to Planning under Climate Change 

    E-Print Network [OSTI]

    Ferreira, Celso

    2012-10-19

    , streamlining the delineation of coastal flood maps. Georeferenced information of land cover is used to define the frictional drag at the sea bottom and to infer modifications to the momentum transmitted to the water column by the winds. We investigated...

  10. Wetland Losses and Human Impacts

    E-Print Network [OSTI]

    Gray, Matthew

    American Wetlands Peatlands of Alaska and Canada Playa Lakes MAV Prairie Potholes Coastal Wetlands mil ha (89 mil) ·Alaska =69 mil ha United States: =127 mil haCanada: =111 mil ha Manitoba (22.5) Ontario (29.2) = 51.7 mil ha 41% 53% Loss** =238 mil ha Canada 53% Alaska 29% Lower US 18%Lower US 29

  11. Investigations into Wetland Carbon Sequestration as Remediation for Global Warming

    SciTech Connect (OSTI)

    Thom, Ronald M.; Blanton, Susan L.; Borde, Amy B.; Williams, Greg D.; Woodruff, Dana L.; Huesemann, Michael H.; KW Nehring and SE Brauning

    2002-01-01

    Wetlands can potentially sequester vast amounts of carbon. However, over 50% of wetlands globally have been degraded or lost. Restoration of wetland systems may therefore result in increased sequestration of carbon. Preliminary results of our investigations into atmospheric carbon sequestration by restored coastal wetlands indicate that carbon can be sequestered in substantial quantities in the first 2-50 years after restoration of natural hydrology and sediment accretion processes.

  12. In: J. Waterway, Port, Coastal, and Ocean Engineering, 126(3): 305-313, 2000. Reservoir Model of Ebb-Tidal Shoal Evolution and Sand Bypassing

    E-Print Network [OSTI]

    US Army Corps of Engineers

    of Ebb-Tidal Shoal Evolution and Sand Bypassing By Nicholas C. Kraus,1 Member, ASCE ABSTRACT A mathematical model is presented for calculating the change in volume and sand-bypassing rate at ebb reservoir can fill to a maximum (equilibrium) volume. The ratio of the input longshore sand transport rate

  13. Tidal-Fluvial and Estuarine Processes in the Lower Columbia River: I. Along-channel Water Level Variations, Pacific Ocean to Bonneville Dam

    SciTech Connect (OSTI)

    Jay, D. A.; Leffler, K.; Diefenderfer, Heida L.; Borde, Amy B.

    2014-06-07

    This two-part paper provides comprehensive time and frequency domain analyses and models of along-channel water level variations in the 234km-long Lower Columbia River and Estuary (LCRE) and documents the response of floodplain wetlands thereto. In Part I, power spectra, continuous wavelet transforms, and harmonic analyses are used to understand the influences of tides, river flow, upwelling and downwelling, and hydropower operations ("power-peaking") on the water level regime. Estuarine water levels are influenced primarily by astronomical tides and coastal processes, and secondarily by river flow. The importance of coastal and tidal influences decreases in the landward direction, and water levels are increasingly controlled by river flow variations at periods from ?1day to years. Water level records are only slightly non-stationary near the ocean, but become increasingly irregular upriver. Although astronomically forced tidal constituents decrease above the estuary, tidal fortnightly and overtide variations increase for 80-200km landward, both relative to major tidal constituents and in absolute terms.

  14. Tidal salt marshes of the southeast Atlantic Coast: A community profile

    SciTech Connect (OSTI)

    Wiegert, R.G.; Freeman, B.J.

    1990-09-01

    This report is part of a series of community profiles on the ecology of wetland and marine communities. This particular profile considers tidal marshes of the southeastern Atlantic coast, from North Carolina south to northern Florida. Alone among the earth's ecosystems, coastal communities are subjected to a bidirectional flooding sometimes occurring twice each day; this flooding affects successional development, species composition, stability, and productivity. In the tidally influenced salt marsh, salinity ranges from less than 1 ppt to that of seawater. Dominant plant species include cordgrasses (Spartina alterniflora and S. cynosuroides), black needlerush (Juncus romerianus), and salt marsh bulrush (Scirpus robustus). Both terrestrail and aquatic animals occur in salt marshes and include herons, egrets ospreys (Pandion haliaetus), bald eagles (Haliaeetus leucocephalus), alligators (Alligator Mississippiensis), manatees (Trichecus manatus), oysters, mussels, and fiddler crabs. Currently, the only significant direct commercial use of the tidal salt marshes is by crabbers seeking the blue crab Callinectes sapidus, but the marshes are quite important recreationally, aesthetically, and educationally. 151 refs., 45 figs., 6 tabs.

  15. An introduction to coastal geomorphology

    SciTech Connect (OSTI)

    Pethick, J.S.

    1984-01-01

    This book is an introduction to wave and tidally dominated coastal forms, including beaches, cliffs, dunes, estuaries, mudflats and marshlands. The book emphasises the physical mechanisms by which this variety of landforms is produced and maintained. It introduces the energy outputs - waves, currents, tides - into the coastal 'machine', examines the way in which this energy is converted into water and sediment movement, and leads to an account of coastal landform development.

  16. Tilted Baroclinic Tidal Vortices MIGUEL CANALS AND GENO PAWLAK

    E-Print Network [OSTI]

    MacCready, Parker

    Tilted Baroclinic Tidal Vortices MIGUEL CANALS AND GENO PAWLAK Department of Ocean and Resources coherence. It is suggested that this may lead to a conversion of potential energy into kinetic energy. 1 mixing of coastal waters (Mul- ler and Garrett 2003). Of particular importance is the tidally driven case

  17. Estuarine Habitats for Juvenile Salmon in the Tidally-Influenced Lower Columbia River and Estuary : Reporting Period September 15, 2008 through May 31, 2009.

    SciTech Connect (OSTI)

    Baptista, António M. [Oregon Health & Science University, Science and Technology Center for Coastal Margin Observation and Prediction

    2009-08-02

    This work focuses on the numerical modeling of Columbia River estuarine circulation and associated modeling-supported analyses conducted as an integral part of a multi-disciplinary and multi-institutional effort led by NOAA's Northwest Fisheries Science Center. The overall effort is aimed at: (1) retrospective analyses to reconstruct historic bathymetric features and assess effects of climate and river flow on the extent and distribution of shallow water, wetland and tidal-floodplain habitats; (2) computer simulations using a 3-dimensional numerical model to evaluate the sensitivity of salmon rearing opportunities to various historical modifications affecting the estuary (including channel changes, flow regulation, and diking of tidal wetlands and floodplains); (3) observational studies of present and historic food web sources supporting selected life histories of juvenile salmon as determined by stable isotope, microchemistry, and parasitology techniques; and (4) experimental studies in Grays River in collaboration with Columbia River Estuary Study Taskforce (CREST) and the Columbia Land Trust (CLT) to assess effects of multiple tidal wetland restoration projects on various life histories of juvenile salmon and to compare responses to observed habitat-use patterns in the mainstem estuary. From the above observations, experiments, and additional modeling simulations, the effort will also (5) examine effects of alternative flow-management and habitat-restoration scenarios on habitat opportunity and the estuary's productive capacity for juvenile salmon. The underlying modeling system is part of the SATURN1coastal-margin observatory [1]. SATURN relies on 3D numerical models [2, 3] to systematically simulate and understand baroclinic circulation in the Columbia River estuary-plume-shelf system [4-7] (Fig. 1). Multi-year simulation databases of circulation are produced as an integral part of SATURN, and have multiple applications in understanding estuary/plume variability, the role of the estuary and plume on salmon survival, and functional changes in the estuary-plume system in response to climate and human activities.

  18. Spatial variability within a single parautochthonous Paratethyan tidal flat deposit (Karpatian, Lower Miocene Kleinebersdorf, Lower Austria)

    E-Print Network [OSTI]

    Zuschin, Martin

    Spatial variability within a single parautochthonous Paratethyan tidal flat deposit (Karpatian and Diplodonta rotundata points to a low-energy coastal setting with at least partly nutrient-rich sediment the interpretation of a parautochthonous to slightly transported tidal flat deposit. Key words: tidal flat, diversity

  19. Advances in Wetland Status and Trends Monitoring

    E-Print Network [OSTI]

    and natural factors (Atkin, 1977). Section 404 of the Federal Water Pollution Control Act (as amended in 1972) and the 1985 Food Security Acts swampbuster pro- visions required that all wetlands and associ- ated boundaries val- ues. To combat these problems, in 1972, Congress passed the Coastal Zone Management Act. The law

  20. Structural and Functional Loss in Restored Wetland David Moreno-Mateos1,2

    E-Print Network [OSTI]

    . Power1 , Francisco A. Comi´n3 , Roxana Yockteng4 1 Integrative Biology Department, University and wetlands restored in cold climates. Also, wetlands experiencing more (riverine and tidal) hydrologic function and structure will spread. Citation: Moreno-Mateos D, Power ME, Comi´n FA, Yockteng R (2012

  1. Wetlands Regional Monitoring Program Plan 2002 Part 2: Data Collection Protocols Sediment Contaminants

    E-Print Network [OSTI]

    Wetlands Regional Monitoring Program Plan 2002 Part 2: Data Collection Protocols Sediment Contaminants WRMP Version 1 June 2002 1 Data Collection Protocol Tidal Wetland Sediment Contamination Joshua N Concerns about intertidal sediment contamination are increasing in the Bay Area. There is concern

  2. The importance of tidal creek ecosystems Keywords: Estuary; Tidal creek; Pollution

    E-Print Network [OSTI]

    Mallin, Michael

    . They are most abundant along the Atlantic Seaboard from New Jersey to Florida, and along the Gulf Coast). Tidal creeks are especially abundant in low-energy systems such as protected areas behind barrier. As an example, the four southernmost coastal counties in North Carolina (Onslow, Pender, New Hanover

  3. Climate change and restoration factors affecting fecal pathogen dynamics in wetland systems

    E-Print Network [OSTI]

    Miller, Woutrina A.; Watson, Fred

    2011-01-01

    the fate and transport of protozoa in coastal Californiathe transport of Cryptosporidium and Giardia in Californiaand transport of fecal pathogens in wetland systems on the central coast of California

  4. Tidal Energy Basics

    Broader source: Energy.gov [DOE]

    Some of the oldest ocean energy technologies use tidal power. For tidal differences to be harnessed into electricity, the difference between high and low tides must be more than 16 feet (or at least 5 meters). However, there are only about 40 sites on Earth with tidal ranges of this magnitude.

  5. Comment on "Wetland Sedimentation from Hurricanes Katrina and Rita"

    E-Print Network [OSTI]

    Törnqvist, Torbjörn E.

    Comment on "Wetland Sedimentation from Hurricanes Katrina and Rita" Torbjörn E. Törnqvist,1 * Chris. (Reports, 20 October 2006, p. 449) measured sedimentation from Hurricanes Katrina and Rita in coastal, their annualized hurricane deposition rate is overestimated, whereas riverine deposition is underestimated

  6. Clarence Strait Tidal Energy Project, Tenax Energy Tropical Tidal...

    Open Energy Info (EERE)

    Page Edit History Clarence Strait Tidal Energy Project, Tenax Energy Tropical Tidal Test Centre, Jump to: navigation, search 1 Retrieved from "http:en.openei.orgw...

  7. Wetland Importance Matthew J. Gray

    E-Print Network [OSTI]

    Gray, Matthew

    Stabilization ·Sediment and Nutrient Retention & Export ·Wetland-dependent Wildlife Habitat ·Aquatic million /year Deforestation Channelization Levees 10 m ½ energy dissipated 1 ac wetland 1 ac. Wetland 4 Environmental Values Sediment & Nutrient Retention & Export Climate Control Water Quality Chemical & Nutrient

  8. Virginia coastal resources management program

    SciTech Connect (OSTI)

    Not Available

    1985-08-01

    Approval of a coastal management plan for coastal land and water use activities on the coast of Virginia is proposed. The coastal management area would embrace all of Tidewater Virginia, approximately 5000 miles long, and would extend to the three-mile outer limit of the United States territorial sea. The core regulatory program would include fisheries management, subaqueous lands management, wetland management, dunes management, nonpoint source pollution control, point source pollution control, shoreline sanitation, and air pollution control. Geographic areas of particular concern would be designated as worthy of special consideration in any planning or management process. These areas would include natural resource areas, such as wetlands, spawning areas, coastal sand dunes, barrier islands, and special wildlife management areas. Natural hazard areas would include areas vulnerable to erosion and areas subject to damage from wind, tides, and storm-related events. Geographic areas of special concern would include those with particular conservation, recreational, ecological, and aesthetic values. Waterfront development areas would include ports, commercial fishing piers, and community waterfronts. Shorefront access planning would provide access to the shoreline and water for recreational activities. Each year, two additional boat ramps would be planned for construction. Energy facility planning would focus on facilities involved in the production of electricity and petroleum, and in the export of coal. Shoreline erosion mitigation planning would identify, control, and mitigate erosion.

  9. Chapter 16 Wetlands

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    could affect these wetlands. Related information can be found in Chapter 14, Geology and Soils; Chapter 15, Water; Chapter 17, Vegetation, Chapter 27, Consultation,...

  10. Modeling the Effects of Tidal Energy Extraction on Estuarine Hydrodynamics in a Stratified Estuary

    SciTech Connect (OSTI)

    Yang, Zhaoqing; Wang, Taiping

    2013-08-15

    A three-dimensional coastal ocean model with a tidal turbine module was used in this paper to study the effects of tidal energy extraction on temperature and salinity stratification and density driven two-layer estuarine circulation. Numerical experiments with various turbine array configurations were carried out to investigate the changes in tidally mean temperature, salinity and velocity profiles in an idealized stratified estuary that connects to coastal water through a narrow tidal channel. The model was driven by tides, river inflow and sea surface heat flux. To represent the realistic size of commercial tidal farms, model simulations were conducted based on a small percentage of the total number of turbines that would generate the maximum extractable energy in the system. Model results indicated that extraction of tidal energy will increase the vertical mixing and decrease the stratification in the estuary. Extraction of tidal energy has stronger impact on the tidally-averaged salinity, temperature and velocity in the surface layer than the bottom. Energy extraction also weakens the two-layer estuarine circulation, especially during neap tides when tidal mixing the weakest and energy extraction is the smallest. Model results also show that energy generation can be much more efficient with higher hub height with relatively small changes in stratification and two-layer estuarine circulation.

  11. Modeling In-stream Tidal Energy Extraction and Its Potential Environmental Impacts

    SciTech Connect (OSTI)

    Yang, Zhaoqing; Wang, Taiping; Copping, Andrea; Geerlofs, Simon H.

    2014-09-30

    In recent years, there has been growing interest in harnessing in-stream tidal energy in response to concerns of increasing energy demand and to mitigate climate change impacts. While many studies have been conducted to assess and map tidal energy resources, efforts for quantifying the associated potential environmental impacts have been limited. This paper presents the development of a tidal turbine module within a three-dimensional unstructured-grid coastal ocean model and its application for assessing the potential environmental impacts associated with tidal energy extraction. The model is used to investigate in-stream tidal energy extraction and associated impacts on estuarine hydrodynamic and biological processes in a tidally dominant estuary. A series of numerical experiments with varying numbers and configurations of turbines installed in an idealized estuary were carried out to assess the changes in the hydrodynamics and biological processes due to tidal energy extraction. Model results indicated that a large number of turbines are required to extract the maximum tidal energy and cause significant reduction of the volume flux. Preliminary model results also indicate that extraction of tidal energy increases vertical mixing and decreases flushing rate in a stratified estuary. The tidal turbine model was applied to simulate tidal energy extraction in Puget Sound, a large fjord-like estuary in the Pacific Northwest coast.

  12. Ecologically Significant Wetlands

    E-Print Network [OSTI]

    Agreement 280016 © 1999 Montana Natural Heritage Program State Library Building · P.O. Box 201800 · 1515 on vegeta- tion, documenting the types of wetland communities present, their quality and condition, and rare integrity. Our observations indicate that some types of wetlands, like wet meadows and valley bottom

  13. Common benthic algae and cyanobacteria in southern California tidal wetlands

    E-Print Network [OSTI]

    Janousek, Christopher N

    2011-01-01

    Janousek Janousek 2011: Algae and cyanobacteria of southernto the Marine Bluegreen Algae. John Wiley and Sons, NewDistribution of bluegreen algae in a Mississippi gulf coast

  14. Climate Change and San Francisco Bay-Delta Tidal Wetlands

    E-Print Network [OSTI]

    Parker, V. Thomas; Callaway, John C.; Schile, Lisa M.; Vasey, Michael C.; Herbert, Ellen R.

    2011-01-01

    National Institute for Climate Change Research, Coastalthe context of predicted climate change. Madroño 54(3):234–18–20. Dettinger MD. 2005. From climate-change spaghetti to

  15. Common benthic algae and cyanobacteria in southern California tidal wetlands

    E-Print Network [OSTI]

    Janousek, Christopher N

    2011-01-01

    2001b. Form-genus VIII. Gloeocapsa. In: Bergey’s Manual ® of1969. Nitrogen fixation by Gloeocapsa. Science 165:908-909.Chroococcus sp(p). Gloeocapsa sp(p). Synechocystis *

  16. Common benthic algae and cyanobacteria in southern California tidal wetlands

    E-Print Network [OSTI]

    Janousek, Christopher N

    2011-01-01

    dynamics of benthic microalgae in salt marshes. In: Conceptsand composition of microalgae and photosynthetic bacteria innotable cyanobacteria, microalgae and macroalgae observed in

  17. Climate Change and San Francisco Bay-Delta Tidal Wetlands

    E-Print Network [OSTI]

    Parker, V. Thomas; Callaway, John C.; Schile, Lisa M.; Vasey, Michael C.; Herbert, Ellen R.

    2011-01-01

    National Institute for Climate Change Research, Coastalcontext of predicted climate change. Madroño 54(3):234–248.MD. 2005. From climate-change spaghetti to climate-change

  18. Will Tidal Wetland Restoration Enhance Populations of Native Fishes?

    E-Print Network [OSTI]

    Brown, Larry R.

    2003-01-01

    found insects to be the most frequent food item ingested byon food resources associated with Egeria, such as insect

  19. Coastal Conservation

    SciTech Connect (OSTI)

    Diefenderfer, Heida L.

    2014-12-23

    Book review of Coastal Conservation Edited by Brooke Maslo and Julie L. Lockwood Cambridge University Press, Cambridge, UK, 2014, 382 pages ISBN 978-1-107-60674-6,

  20. Coastal Marsh Vegetation Dynamics of the East Bay of Galveston Bay, Texas 

    E-Print Network [OSTI]

    Johnson, Jeremy Scott

    2012-10-19

    The structure and function of coastal marshes results from a complex interaction of biotic and abiotic processes that continually influence the characteristics of marsh vegetation. A great deal of research has focused on how tidal processes...

  1. Much of the North Carolina Coastal Plain is wet and supports plant communities that are domi-

    E-Print Network [OSTI]

    Krings, Alexander

    Much of the North Carolina Coastal Plain is wet and supports plant communities that are domi- nated, the North Caro- lina State University Herbarium. 1 Department of Botany, North Carolina State University.S.A. WINTER KEYS TO COMMON, WETLAND TREES, SHRUBS, AND WOODY VINES OF THE NORTH CAROLINA COASTAL PLAIN JON M

  2. Tide-induced groundwater fluctuation in a coastal leaky confined aquifer system extending under the sea

    E-Print Network [OSTI]

    Jiao, Jiu Jimmy

    Tide-induced groundwater fluctuation in a coastal leaky confined aquifer system extending under, China Abstract. This paper presents the analytical solution of groundwater response to tidal fluctuation length, dimensionless leakage, and tidal efficiency on the groundwater level fluctuations in the inland

  3. Wetland Mapping Matthew J. Gray

    E-Print Network [OSTI]

    Gray, Matthew

    ) Emergency Wetlands Resources Act (1986) Map all U.S. wetlands by 2001 (95%, WI, NM, MT) and provide distance; perpendicular to contour gradient S N W E ·Transect lower end: permanent water or cardinal 10 m apart = shrub 5 m apart = herbaceous/vine (use the midpoint distance)Linear Wetlands? ·Secure

  4. Tidal Residual Eddies and their Effect on Water Exchange in Puget Sound

    SciTech Connect (OSTI)

    Yang, Zhaoqing; Wang, Taiping

    2013-08-30

    Tidal residual eddies are one of the important hydrodynamic features in tidally dominant estuaries and coastal bays, and they could have significant effects on water exchange in a tidal system. This paper presents a modeling study of tides and tidal residual eddies in Puget Sound, a tidally dominant fjord-like estuary in the Pacific Northwest coast, using a three-dimensional finite-volume coastal ocean model. Mechanisms of vorticity generation and asymmetric distribution patterns around an island/headland were analyzed using the dynamic vorticity transfer approach and numerical experiments. Model results of Puget Sound show that a number of large twin tidal residual eddies exist in the Admiralty Inlet because of the presence of major headlands in the inlet. Simulated residual vorticities near the major headlands indicate that the clockwise tidal residual eddy (negative vorticity) is generally stronger than the anticlockwise eddy (positive vorticity) because of the effect of Coriolis force. The effect of tidal residual eddies on water exchange in Puget Sound and its sub-basins were evaluated by simulations of dye transport. It was found that the strong transverse variability of residual currents in the Admiralty Inlet results in a dominant seaward transport along the eastern shore and a dominant landward transport along the western shore of the Inlet. A similar transport pattern in Hood Canal is caused by the presence of tidal residual eddies near the entrance of the canal. Model results show that tidal residual currents in Whidbey Basin are small in comparison to other sub-basins. A large clockwise residual circulation is formed around Vashon Island near entrance of South Sound, which can potentially constrain the water exchange between the Central Basin and South Sound.

  5. The Virginia Wetlands Report

    E-Print Network [OSTI]

    Brothers, age 12), the well-dressed project manager representing Alterland Development Company, made his formal request to develop a parcel locally known as "Tillage Farm." Insisting that his company would into 14 single-family lots, filling in wetlands and dredging a pond. "You are not losing a past, you

  6. A Modeling Study of the Potential Water Quality Impacts from In-Stream Tidal Energy Extraction

    SciTech Connect (OSTI)

    Wang, Taiping; Yang, Zhaoqing; Copping, Andrea E.

    2013-11-09

    To assess the effects of tidal energy extraction on water quality in a simplified estuarine system, which consists of a tidal bay connected to the coastal ocean through a narrow channel where energy is extracted using in-stream tidal turbines, a three-dimensional coastal ocean model with built-in tidal turbine and water quality modules was applied. The effects of tidal energy extraction on water quality were examined for two energy extraction scenarios as compared with the baseline condition. It was found, in general, that the environmental impacts associated with energy extraction depend highly on the amount of power extracted from the system. Model results indicate that, as a result of energy extraction from the channel, the competition between decreased flushing rates in the bay and increased vertical mixing in the channel directly affects water quality responses in the bay. The decreased flushing rates tend to cause a stronger but negative impact on water quality. On the other hand, the increase of vertical mixing could lead to higher bottom dissolved oxygen at times. As the first modeling effort directly aimed at examining the impacts of tidal energy extraction on estuarine water quality, this study demonstrates that numerical models can serve as a very useful tool for this purpose. However, more careful efforts are warranted to address system-specific environmental issues in real-world, complex estuarine systems.

  7. Tidal Energy Research

    SciTech Connect (OSTI)

    Stelzenmuller, Nickolas; Aliseda, Alberto; Palodichuk, Michael; Polagye, Brian; Thomson, James; Chime, Arshiya; Malte, Philip

    2014-03-31

    This technical report contains results on the following topics: 1) Testing and analysis of sub-scale hydro-kinetic turbines in a flume, including the design and fabrication of the instrumented turbines. 2) Field measurements and analysis of the tidal energy resource and at a site in northern Puget Sound, that is being examined for turbine installation. 3) Conceptual design and performance analysis of hydro-kinetic turbines operating at high blockage ratio, for use for power generation and flow control in open channel flows.

  8. Onsite Wastewater Treatment Systems: Constructed Wetlands 

    E-Print Network [OSTI]

    Lesikar, Bruce J.

    2008-10-23

    A constructed wetland system for domestic wastewater treatment is designed to mimic the natural wetland treatment process of Mother Nature. This publication explains the treatment, design, operation and maintenance of constructed wetlands....

  9. INTERIOR WETLANDS PROGRAM STRATEGIC PLAN

    E-Print Network [OSTI]

    #12;INTERIOR WETLANDS PROGRAM STRATEGIC PLAN 1993 -1997 July 1993 FRASER RIVER ACTION PLAN CANADA'S GREEN PLAN ENVIRONMENT CANADA DUCKS UNLIMITED CANADA GOVERNMENT OF BRITISH COLUMBIA #12;Table

  10. DYNAMIC TIDAL EFFECTS ON TSUNAMI COASTAL HAZARD IN LARGE ESTUARIES

    E-Print Network [OSTI]

    Grilli, Stéphan T.

    and a nuclear powerplant (Surry) up the James River. In our modeling methodology, we first separately simulate possible Submarine Mass Failure (SMF; see Grilli et al., 2015); 4 levels of nested grids are used, from 1

  11. Wetland Importance Matthew J. Gray

    E-Print Network [OSTI]

    Gray, Matthew

    Stabilization ·Sediment and Nutrient Retention & Export ·Wetland-dependent Wildlife Habitat ·Aquatic million /year Deforestation Channelization Levees 10 m ½ energy dissipated 1 ac. Wetland 4 ac-ft water Sediment & Nutrient Retention & Export Climate Control Water Quality Chemical & Nutrient Update by Plants

  12. Maintenance of Stormwater Wetlands and Wet Ponds

    E-Print Network [OSTI]

    Hunt, William F.

    1 Maintenance of Stormwater Wetlands and Wet Ponds Stormwater management practices must be kept maintenance guidelines for stormwater wetlands and wet ponds, two stormwater prac- tices that are being constructed across North Carolina. OVERVIEW As its name implies, a stormwater wetland is a wetland system

  13. Modeling of In-stream Tidal Energy Development and its Potential Effects in Tacoma Narrows, Washington, USA

    SciTech Connect (OSTI)

    Yang, Zhaoqing; Wang, Taiping; Copping, Andrea E.; Geerlofs, Simon H.

    2014-10-01

    Understanding and providing proactive information on the potential for tidal energy projects to cause changes to the physical system and to key water quality constituents in tidal waters is a necessary and cost-effective means to avoid costly regulatory involvement and late stage surprises in the permitting process. This paper presents a modeling study for evaluating the tidal energy extraction and its potential impacts on the marine environment in a real world site - Tacoma Narrows of Puget Sound, Washington State, USA. An unstructured-grid coastal ocean model, fitted with a module that simulates tidal energy devices, was applied to simulate the tidal energy extracted by different turbine array configurations and the potential effects of the extraction at local and system-wide scales in Tacoma Narrows and South Puget Sound. Model results demonstrated the advantage of an unstructured-grid model for simulating the far-field effects of tidal energy extraction in a large model domain, as well as assessing the near-field effect using a fine grid resolution near the tidal turbines. The outcome shows that a realistic near-term deployment scenario extracts a very small fraction of the total tidal energy in the system and that system wide environmental effects are not likely; however, near-field effects on the flow field and bed shear stress in the area of tidal turbine farm are more likely. Model results also indicate that from a practical standpoint, hydrodynamic or water quality effects are not likely to be the limiting factor for development of large commercial-scale tidal farms. Results indicate that very high numbers of turbines are required to significantly alter the tidal system; limitations on marine space or other environmental concerns are likely to be reached before reaching these deployment levels. These findings show that important information obtained from numerical modeling can be used to inform regulatory and policy processes for tidal energy development.

  14. Hydrogeologic characterization of Illinois wetlands

    SciTech Connect (OSTI)

    Miner, J.J.; Miller, M.V.; Rorick, N.L.; Fucciolo, C.S. (Illinois State Geological Survey, Champaign, IL (United States))

    1994-04-01

    The Illinois State Geological Survey (ISGS), under contract from the Illinois Department of Transportation (IDOT), is evaluating a series of selected wetlands and sites proposed for wetland construction and/or restoration. The program is associated with wetland mitigation for unavoidable effects of state highway construction. The goal of this ongoing program is: (1) to collect commonly lacking geologic, geomorphic, hydrologic, and geochemical data from various wetland sites; and (2) to create a database of this information for use by government agencies and the private sector. Some of the potential uses of this database include: (1) determination of history, role, and possible life cycle of various wetland types allowing more effective design criteria; (2) functional comparison of constructed or restored wetlands versus natural wetlands; (3) testing of wetland hypotheses and delineation techniques under a variety of known hydrogeologic conditions in Illinois; (4) hydrogeologic assessment of potential mitigation sites against a suite of known sites; and (5) determination of data and collection methods appropriate for hydrogeologic wetland studies. A series of tasks is required to complete each study. Historical information is collected from ISGS records, including data regarding topography, soils, sediments, bedrock, and local well records. A field-testing plan is prepared, which includes goals of the study, methods, research potential, and potential results. An initial report is prepared after geologic and geochemical characterization and the installation of needed ground water monitoring wells and surface water gauges. After one year of water-level monitoring, a final report is prepared regarding the present conditions of a site. Further monitoring may be required to determine the performance at constructed and/or restored sites.

  15. Temperature and Tidal Dynamics in a Branching Estuarine System

    E-Print Network [OSTI]

    Wagner, Richard Wayne

    2012-01-01

    distribution of tidal energy. When specific locations ordissipation which may alter tidal energy in other parts ofAdditionally, changes to tidal energy reflection within a

  16. Microsoft Word - RM1_Tidal Turbine_UW Tidal Resource-Abstract...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    turbine operating in a narrow, tidal channel. The site is a generalized version of Tacoma Narrows, Puget Sound, Washington. The resource is a mixed, mainly semidiurnal tidal...

  17. Fourier and autocorrelation analysis of estuarine tidal rhythmites, lower Breathitt Formation (Pennsylvania), eastern Kentucky, USA

    SciTech Connect (OSTI)

    Martino, R.L.; Sanderson, D.D. (Marshall Univ., Huntington, WV (United States))

    1993-01-01

    Outcrops of the Pennsylvanian Breathitt Formation in eastern Kentucky reveal a rhythmic pattern of siliciclastic sedimentation in a marginal marine coastal setting. A 15-23 m thick stratigraphic interval of thinly interbedded, fine sandstone and shale displays tidally generated features such as flaser and wavy current ripple bedding, bipolar paleocurrents, and cyclic thickening and thinning of mud-draped sandstone layers. A statistical analysis of sand layer thickness was carried out using shale partings as bounding surfaces for the individual sand units. Fourier and autocorrelation analyses were performed on two vertical sequences containing a total of over 2,100 layers. The results reveal the presence of four cycles of thickness variation. First-order cycles consist of alternating thick-thin sand layers. These daily couplets may reflect unequal flood and ebb currents during a single tidal cycle or dominant and subordinate tidal deposits in an ebb or flood dominated semidiurnal or mixed system. Second-order cycles typically consist of 11-14 sand layers and reflect spring-neap variations in tidal range and current velocities. Third-order cycles are usually composed of 24-35 layers and are formed in response to monthly variations in tidal range resulting from the ellipticity of the moon's orbit. Fourth-order cycles generally contain about 150 layers (range, 100-166) and were caused by seasonal maxima in tidal range associated with the solstice (winter, summer) and seasonal minima associated with the equinox (spring, fall).

  18. Hydrocarbon removal with constructed wetlands 

    E-Print Network [OSTI]

    Eke, Paul Emeka

    2008-01-01

    Wetlands have long played a significant role as natural purification systems, and have been effectively used to treat domestic, agricultural and industrial wastewater. However, very little is known about the biochemical ...

  19. Control of hardwood regeneration in restored carolina bay depression wetlands.

    SciTech Connect (OSTI)

    Moser, Lee, J.; Barton, Christopher, D.; Blake, John, I.

    2012-06-01

    Carolina bays are depression wetlands located in the coastal plain region of the eastern United States. Disturbance of this wetland type has been widespread, and many sites contain one or more drainage ditches. Restoration of bays is of interest because they are important habitats for rare flora and fauna. Previous bay restoration projects have identified flood-tolerant woody competitors in the seedbank and re-sprouting as impediments to the establishment of desired herbaceous wetland vegetation communities. We restored 3 bays on the Savannah River Site, South Carolina, by plugging drainage ditches, harvesting residual pine/hardwood stands within the bays, and monitoring the vegetative response of the seedbank to the hydrologic change. We applied a foliar herbicide on one-half of each bay to control red maple (Acerrubrum), sweetgum (Liquidambar styraciflua), and water oak (Quercus nigra) sprouting, and we tested its effectiveness across a hydrologic gradient in each bay. Hardwood regeneration was partially controlled by flooding in bays that exhibited long growing season hydroperiods. The findings also indicated that herbicide application was an effective means for managing hardwood regeneration and re-sprouting in areas where hydrologic control was ineffective. Herbicide use had no effect on species richness in the emerging vegetation community. In late-season drawdown periods, or in bays where hydroperiods are short, more than one herbicide application may be necessary.

  20. INSTITUTE FOR COASTAL SCIENCE

    E-Print Network [OSTI]

    Gopalakrishnan, K.

    plain, and barrier island systems Social Science and Coastal Policy: Examine politics and public policy

  1. nature geoscience | VOL 1 | DECEMBER 2008 | www.nature.com/naturegeoscience 805 Sustaining coastal urban ecosystems

    E-Print Network [OSTI]

    Törnqvist, Torbjörn E.

    Sustaining coastal urban ecosystems Torbjörn E. TörnqvisT1 * and douglas j. MEffErT2 are at 1 Department and in the future. Preserving protective shorelines and wetlands wherever feasible, limiting the growth of urban is required to make urban coasts more resilient. ­92­93­94­95­96­97 ­91 ­90 ­89 ­88 ­87 31 30 29 28 27 26

  2. Estuarine Microbial Food Web Patterns in a Lake Erie Coastal P.J. Lavrentyev1

    E-Print Network [OSTI]

    Jochem, Frank J.

    Estuarine Microbial Food Web Patterns in a Lake Erie Coastal Wetland P.J. Lavrentyev1 , M.J. Mc protists were examined relative to microbial food web dynamics (growth, grazing, and nitrogen cycling rates pattern. Large light/dark NH4 + uptake differences were observed in the hypereutrophic OWC interior

  3. Tidal evolution of close binary asteroid systems

    E-Print Network [OSTI]

    Taylor, PA; Margot, JL

    2010-01-01

    a positive fractional power of the tidal frequency (at leasttidal bulges of the components as these will depend on the square (or higher powers)power, natural deviations from a spherical shape may exceed the amplitude of the tidal

  4. Dissecting the pressure field in tidal flow

    E-Print Network [OSTI]

    amplitude [N x 107 ] phase relative to the velocity [deg] power [W x107 ] 1 2 3 4 tidal excursion parameterDissecting the pressure field in tidal flow past a headland: When is form drag "real?" Sally Warner waves eddies H L LHH H L L LH #12;Numerical model Gaussian-shaped headland Barotropic tidal velocity D L

  5. General relativistic tidal heating for Moller pseudotensor

    E-Print Network [OSTI]

    Lau Loi So

    2015-09-30

    Thorne elucidated that the relativistic tidal heating is the same as the Newtonian theory. Moreover, Thorne also claimed that the tidal heating is independent of how one localizes gravitational energy and is unambiguously given by a certain formula. Purdue and Favata calculated the tidal heating for different classical pseudotensors including Moller and obtained the results all matched with the Newtonian perspective. After re-examined this Moller pseudotensor, we find that there does not exist any tidal heating value. Thus we claim that the relativistic tidal heating is pseudotensor independent under the condition that if the peusdotensor is a Freud typed superpotential.

  6. General relativistic tidal heating for Moller pseudotensor

    E-Print Network [OSTI]

    So, Lau Loi

    2015-01-01

    Thorne elucidated that the relativistic tidal heating is the same as the Newtonian theory. Moreover, Thorne also claimed that the tidal heating is independent of how one localizes gravitational energy and is unambiguously given by a certain formula. Purdue and Favata calculated the tidal heating for different classical pseudotensors including Moller and obtained the results all matched with the Newtonian perspective. After re-examined this Moller pseudotensor, we find that there does not exist any tidal heating value. Thus we claim that the relativistic tidal heating is pseudotensor independent under the condition that if the peusdotensor is a Freud typed superpotential.

  7. Maine Tidal Power Initiative: Environmental Impact Protocols For Tidal Power

    SciTech Connect (OSTI)

    Peterson, Michael Leroy; Zydlewski, Gayle Barbin; Xue, Huijie; Johnson, Teresa R.

    2014-02-02

    The Maine Tidal Power Initiative (MTPI), an interdisciplinary group of engineers, biologists, oceanographers, and social scientists, has been conducting research to evaluate tidal energy resources and better understand the potential effects and impacts of marine hydro-kinetic (MHK) development on the environment and local community. Project efforts include: 1) resource assessment, 2) development of initial device design parameters using scale model tests, 3) baseline environmental studies and monitoring, and 4) human and community responses. This work included in-situ measurement of the environmental and social response to the pre-commercial Turbine Generator Unit (TGU®) developed by Ocean Renewable Power Company (ORPC) as well as considering the path forward for smaller community scale projects.

  8. Coastal Zone Management Act and related legislation: Revision 3. Environmental Guidance Program Reference Book

    SciTech Connect (OSTI)

    Not Available

    1993-10-15

    In recognition of the increasing pressures upon the nation`s coastal resources, Congress enacted the Coastal Zone Management Act in 1972. Its purpose is to encourage states to preserve, protect, develop, and, where possible, restore or enhance such valuable natural resources as wetlands, floodplains, estuaries, beaches, dunes, barrier islands, and coral reefs, as well as the fish and wildlife utilizing those habitats. A unique feature of the Act is that participation by states is voluntary. One key provision for encouraging states to participate is the availability of federal financial assistance to any coastal state or territory, including those on the Great Lakes, which is willing to develop and implement a comprehensive coastal management program. Additionally, the Coastal Barrier Resources Act (CBRA) was passed in 1983. This report contains the legislative history and statues associated with each Act. Regulations for implementation and other guidance are included.

  9. ARRAY OPTIMIZATION FOR TIDAL ENERGY EXTRACTION IN A TIDAL CHANNEL – A NUMERICAL MODELING ANALYSIS

    SciTech Connect (OSTI)

    Yang, Zhaoqing; Wang, Taiping; Copping, Andrea

    2014-04-18

    This paper presents an application of a hydrodynamic model to simulate tidal energy extraction in a tidal dominated estuary in the Pacific Northwest coast. A series of numerical experiments were carried out to simulate tidal energy extraction with different turbine array configurations, including location, spacing and array size. Preliminary model results suggest that array optimization for tidal energy extraction in a real-world site is a very complex process that requires consideration of multiple factors. Numerical models can be used effectively to assist turbine siting and array arrangement in a tidal turbine farm for tidal energy extraction.

  10. Dynamical modeling of tidal streams

    SciTech Connect (OSTI)

    Bovy, Jo, E-mail: bovy@ias.edu [Institute for Advanced Study, Einstein Drive, Princeton, NJ 08540 (United States)

    2014-11-01

    I present a new framework for modeling the dynamics of tidal streams. The framework consists of simple models for the initial action-angle distribution of tidal debris, which can be straightforwardly evolved forward in time. Taking advantage of the essentially one-dimensional nature of tidal streams, the transformation to position-velocity coordinates can be linearized and interpolated near a small number of points along the stream, thus allowing for efficient computations of a stream's properties in observable quantities. I illustrate how to calculate the stream's average location (its 'track') in different coordinate systems, how to quickly estimate the dispersion around its track, and how to draw mock stream data. As a generative model, this framework allows one to compute the full probability distribution function and marginalize over or condition it on certain phase-space dimensions as well as convolve it with observational uncertainties. This will be instrumental in proper data analysis of stream data. In addition to providing a computationally efficient practical tool for modeling the dynamics of tidal streams, the action-angle nature of the framework helps elucidate how the observed width of the stream relates to the velocity dispersion or mass of the progenitor, and how the progenitors of 'orphan' streams could be located. The practical usefulness of the proposed framework crucially depends on the ability to calculate action-angle variables for any orbit in any gravitational potential. A novel method for calculating actions, frequencies, and angles in any static potential using a single orbit integration is described in the Appendix.

  11. Tidally-induced thermonuclear Supernovae

    E-Print Network [OSTI]

    S. Rosswog; E. Ramirez-Ruiz; W. R. Hix

    2008-11-13

    We discuss the results of 3D simulations of tidal disruptions of white dwarfs by moderate-mass black holes as they may exist in the cores of globular clusters or dwarf galaxies. Our simulations follow self-consistently the hydrodynamic and nuclear evolution from the initial parabolic orbit over the disruption to the build-up of an accretion disk around the black hole. For strong enough encounters (pericentre distances smaller than about 1/3 of the tidal radius) the tidal compression is reversed by a shock and finally results in a thermonuclear explosion. These explosions are not restricted to progenitor masses close to the Chandrasekhar limit, we find exploding examples throughout the whole white dwarf mass range. There is, however, a restriction on the masses of the involved black holes: black holes more massive than $2\\times 10^5$ M$_\\odot$ swallow a typical 0.6 M$_\\odot$ dwarf before their tidal forces can overwhelm the star's self-gravity. Therefore, this mechanism is characteristic for black holes of moderate masses. The material that remains bound to the black hole settles into an accretion disk and produces an X-ray flare close to the Eddington limit of $L_{\\rm Edd} \\simeq 10^{41} {\\rm erg/s} M_{\\rm bh}/1000 M$_\\odot$), typically lasting for a few months. The combination of a peculiar thermonuclear supernova together with an X-ray flare thus whistle-blows the existence of such moderate-mass black holes. The next generation of wide field space-based instruments should be able to detect such events.

  12. Wetland Water Cooling Partnership: The Use of Constructed Wetlands to Enhance Thermoelectric Power Plant Cooling and Mitigate the Demand of Surface Water Use

    SciTech Connect (OSTI)

    Apfelbaum, Steven; Duvall, Kenneth; Nelson, Theresa; Mensing, Douglas; Bengtson, Harlan; Eppich, John; Penhallegon, Clayton; Thompson, Ry

    2013-09-30

    Through the Phase I study segment of contract #DE-NT0006644 with the U.S. Department of Energy’s National Energy Technology Laboratory, Applied Ecological Services, Inc. and Sterling Energy Services, LLC (the AES/SES Team) explored the use of constructed wetlands to help address stresses on surface water and groundwater resources from thermoelectric power plant cooling and makeup water requirements. The project objectives were crafted to explore and develop implementable water conservation and cooling strategies using constructed wetlands (not existing, naturally occurring wetlands), with the goal of determining if this strategy has the potential to reduce surface water and groundwater withdrawals of thermoelectric power plants throughout the country. Our team’s exploratory work has documented what appears to be a significant and practical potential for augmenting power plant cooling water resources for makeup supply at many, but not all, thermoelectric power plant sites. The intent is to help alleviate stress on existing surface water and groundwater resources through harvesting, storing, polishing and beneficially re-using critical water resources. Through literature review, development of conceptual created wetland plans, and STELLA-based modeling, the AES/SES team has developed heat and water balances for conventional thermoelectric power plants to evaluate wetland size requirements, water use, and comparative cooling technology costs. The ecological literature on organism tolerances to heated waters was used to understand the range of ecological outcomes achievable in created wetlands. This study suggests that wetlands and water harvesting can provide a practical and cost-effective strategy to augment cooling waters for thermoelectric power plants in many geographic settings of the United States, particularly east of the 100th meridian, and in coastal and riverine locations. The study concluded that constructed wetlands can have significant positive ancillary socio-economic, ecosystem, and water treatment/polishing benefits when used to complement water resources at thermoelectric power plants. Through the Phase II pilot study segment of the contract, the project team partnered with Progress Energy Florida (now Duke Energy Florida) to quantify the wetland water cooling benefits at their Hines Energy Complex in Bartow, Florida. The project was designed to test the wetland’s ability to cool and cleanse power plant cooling pond water while providing wildlife habitat and water harvesting benefits. Data collected during the monitoring period was used to calibrate a STELLA model developed for the site. It was also used to inform management recommendations for the demonstration site, and to provide guidance on the use of cooling wetlands for other power plants around the country. As a part of the pilot study, Duke Energy is scaling up the demonstration project to a larger, commercial scale wetland instrumented with monitoring equipment. Construction is expected to be finalized in early 2014.

  13. Nevada Test Site Wetlands Assessment

    SciTech Connect (OSTI)

    D. J. Hansen

    1997-05-01

    This report identifies 16 Nevada Test Site (NTS) natural water sources that may be classified by the U.S. Army Corps of Engineers (USACE) as jurisdictional wetlands and identifies eight water sources that may be classified as waters of the United States. These water sources are rare, localized habitats on the NTS that are important to regional wildlife and to isolated populations of water tolerant plants and aquatic organisms. No field investigations on the NTS have been conducted in the past to identify those natural water sources which would be protected as rare habitats and which may fall under regulatory authority of the Clean Water Act (CWA) of 1997. This report identifies and summarizes previous studies of NTS natural water sources, and identifies the current DOE management practices related to the protection of NTS wetlands. This report also presents management goals specific for NTS wetlands that incorporate the intent of existing wetlands legislation, the principles of ecosystem management, and the interests of regional land managers and other stakeholders.

  14. TIDAL NOVAE IN COMPACT BINARY WHITE DWARFS

    SciTech Connect (OSTI)

    Fuller, Jim; Lai Dong [Department of Astronomy, Cornell University, Ithaca, NY 14850 (United States)

    2012-09-01

    Compact binary white dwarfs (WDs) undergoing orbital decay due to gravitational radiation can experience significant tidal heating prior to merger. In these WDs, the dominant tidal effect involves the excitation of outgoing gravity waves in the inner stellar envelope and the dissipation of these waves in the outer envelope. As the binary orbit decays, the WDs are synchronized from outside in (with the envelope synchronized first, followed by the core). We examine the deposition of tidal heat in the envelope of a carbon-oxygen WD and study how such tidal heating affects the structure and evolution of the WD. We show that significant tidal heating can occur in the star's degenerate hydrogen layer. This layer heats up faster than it cools, triggering runaway nuclear fusion. Such 'tidal novae' may occur in all WD binaries containing a CO WD, at orbital periods between 5 minutes and 20 minutes, and precede the final merger by 10{sup 5}-10{sup 6} years.

  15. NOAA | Valuing Coastal and Ocean Ecosystems U.S. Department of Commerce | National Oceanic and Atmospheric Administration

    E-Print Network [OSTI]

    , wetlands, sea grasses, coral reefs, and mangroves. Despite localized successes, habitat trends continue% of coral reefs are already seriously damaged by local sources such as overfishing, destructive fishing and endangered species, human health and well-being. How valuable are healthy coastal and ocean ecosystems? Our

  16. Acoustic Effects of Hydrokinetic Tidal Turbines

    SciTech Connect (OSTI)

    Polagye, Brian

    2011-11-01

    This presentation from the Water Peer Review highlights one of the program's marine and hyrokinetics environmental projects to determine the likely acoustic effects from a tidal energy device.

  17. Tidal Electric | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page| Open Energy Information Serbia-EnhancingEt Al., 2013)Open Energy Information ThreeTianDi GrowthTibagiTidal

  18. Turbulence and internal waves in tidal flow over topography

    E-Print Network [OSTI]

    Gayen, Bishakhdatta

    2012-01-01

    M. C. 2006 An estimate of tidal energy lost to turbulence atcant loss of low-mode tidal energy at 28.9 ? . Geophys. Res.of turbulent kinetic energy over a tidal cycle. Maximum T KE

  19. Dispersion and Tidal Dynamics of Channel-Shoal Estuaries

    E-Print Network [OSTI]

    Holleman, Christopher Dean

    2013-01-01

    San Pablo Bay: ? M 2 and tidal energy flux for the hNS0? M 2 and tidal energy flux for hNS0. . . . . . . . . . .areas dissipate incident tidal energy, countering the added

  20. Wetlands and Aquatic Processes Phosphorus Retention by Wetland Soils used for Treated Wastewater Disposal

    E-Print Network [OSTI]

    Florida, University of

    to evaluate likely mechanisms of P removal in the soils. Intact soil cores (0-40 cm) and bulk soil samples (0Wetlands and Aquatic Processes Phosphorus Retention by Wetland Soils used for Treated Wastewater were to (i) determine the P retention capacity of representative wetland soils being used for disposal

  1. Floodplain and Wetlands Assessment for Construction of a Second...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Floodplain and Wetlands Assessment for Construction of a Second Full Service Access Road over Lena Gulch Floodplain and Wetlands Assessment for Construction of a Second Full...

  2. WETLAND RESOURCES of Eastern South Dakota

    E-Print Network [OSTI]

    -in lies the controwrsy \\\\ c have expcricm:cd 0\\ CT wetlands on the prairie-a rCSIllIrec which provide

  3. EIS-0120: Wetland Assessment | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Remediation Project at the Savannah River Site, Savannah River Operations Office, Aiken, South Carolina The U.S. Department of Energy (DOE) has prepared this wetland assessment in...

  4. Sandia Energy - Tidal & Current Modeling Development and Validation

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Tidal & Current Modeling Development and Validation Home Stationary Power Energy Conversion Efficiency Water Power Technology Development Tidal & Current Modeling Development and...

  5. Tidal deformations of a spinning compact object

    E-Print Network [OSTI]

    Pani, Paolo; Maselli, Andrea; Ferrari, Valeria

    2015-01-01

    The deformability of a compact object induced by a perturbing tidal field is encoded in the tidal Love numbers, which depend sensibly on the object's internal structure. These numbers are known only for static, spherically-symmetric objects. As a first step to compute the tidal Love numbers of a spinning compact star, here we extend powerful perturbative techniques to compute the exterior geometry of a spinning object distorted by an axisymmetric tidal field to second order in the angular momentum. The spin of the object introduces couplings between electric and magnetic deformations and new classes of induced Love numbers emerge. For example, a spinning object immersed in a quadrupolar, electric tidal field can acquire some induced mass, spin, quadrupole, octupole and hexadecapole moments to second order in the spin. The deformations are encoded in a set of inhomogeneous differential equations which, remarkably, can be solved analytically in vacuum. We discuss certain subtleties in defining the multipole mom...

  6. Tidal deformations of a spinning compact object

    E-Print Network [OSTI]

    Paolo Pani; Leonardo Gualtieri; Andrea Maselli; Valeria Ferrari

    2015-06-30

    The deformability of a compact object induced by a perturbing tidal field is encoded in the tidal Love numbers, which depend sensibly on the object's internal structure. These numbers are known only for static, spherically-symmetric objects. As a first step to compute the tidal Love numbers of a spinning compact star, here we extend powerful perturbative techniques to compute the exterior geometry of a spinning object distorted by an axisymmetric tidal field to second order in the angular momentum. The spin of the object introduces couplings between electric and magnetic deformations and new classes of induced Love numbers emerge. For example, a spinning object immersed in a quadrupolar, electric tidal field can acquire some induced mass, spin, quadrupole, octupole and hexadecapole moments to second order in the spin. The deformations are encoded in a set of inhomogeneous differential equations which, remarkably, can be solved analytically in vacuum. We discuss certain subtleties in defining the multipole moments of the central object, which are due to the difficulty in separating the tidal field from the linear response of the object in the solution. By extending the standard procedure to identify the linear response in the static case, we prove analytically that the Love numbers of a Kerr black hole remain zero to second order in the spin. As a by-product, we provide the explicit form for a slowly-rotating, tidally-deformed Kerr black hole to quadratic order in the spin, and discuss its geodesic and geometrical properties.

  7. Tidal Wetland Vegetation in the San Francisco Bay-Delta Estuary

    E-Print Network [OSTI]

    Vasey, Michael C.; Parker, V. Thomas; Callaway, John C.; Herbert, Ellen R.; Schile, Lisa M.

    2012-01-01

    lati- folia, Rubus discolor, Salix lasiolepis, and TyphaPhragmites australis N Sala Salix lasiolepis N Atfi AthyriumPhragmites australis N Sala Salix lasiolepis N Atfi Athyrium

  8. 12th Annual Wave & Tidal 2015

    Broader source: Energy.gov [DOE]

    The UK is currently the undisputed global leader in marine energy, with more wave and tidal stream devices installed than the rest of the world combined. This leading position is built on an...

  9. Feasibility of Tidal and Ocean Current Energy in False Pass, Aleutian Islands, Alaska FINAL REPORT

    SciTech Connect (OSTI)

    Wright, Bruce Albert

    2014-05-07

    The Aleutian Pribilof Islands Association was awarded a U.S. Department of Energy Tribal Energy Program grant (DE-EE0005624) for the Feasibility of Tidal and Ocean Current Energy in False Pass, Aleutian Islands, Alaska (Project). The goal of the Project was to perform a feasibility study to determine if a tidal energy project would be a viable means to generate electricity and heat to meet long-term fossil fuel use reduction goals, specifically to produce at least 30% of the electrical and heating needs of the tribally-owned buildings in False Pass. The Project Team included the Aleut Region organizations comprised of the Aleutian Pribilof Island Association (APIA), and Aleutian Pribilof Island Community Development Association (APICDA); the University of Alaska Anchorage, ORPC Alaska a wholly-owned subsidiary of Ocean Renewable Power Company (ORPC), City of False Pass, Benthic GeoScience, and the National Renewable Energy Laboratory (NREL). The following Project objectives were completed: collected existing bathymetric, tidal, and ocean current data to develop a basic model of current circulation at False Pass, measured current velocities at two sites for a full lunar cycle to establish the viability of the current resource, collected data on transmission infrastructure, electrical loads, and electrical generation at False Pass, performed economic analysis based on current costs of energy and amount of energy anticipated from and costs associated with the tidal energy project conceptual design and scoped environmental issues. Utilizing circulation modeling, the Project Team identified two target sites with strong potential for robust tidal energy resources in Isanotski Strait and another nearer the City of False Pass. In addition, the Project Team completed a survey of the electrical infrastructure, which identified likely sites of interconnection and clarified required transmission distances from the tidal energy resources. Based on resource and electrical data, the Project Team developed a conceptual tidal energy project design utilizing ORPC’s TidGen® Power System. While the Project Team has not committed to ORPC technology for future development of a False Pass project, this conceptual design was critical to informing the Project’s economic analysis. The results showed that power from a tidal energy project could be provided to the City of False at a rate at or below the cost of diesel generated electricity and sold to commercial customers at rates competitive with current market rates, providing a stable, flat priced, environmentally sound alternative to the diesel generation currently utilized for energy in the community. The Project Team concluded that with additional grants and private investment a tidal energy project at False Pass is well-positioned to be the first tidal energy project to be developed in Alaska, and the first tidal energy project to be interconnected to an isolated micro grid in the world. A viable project will be a model for similar projects in coastal Alaska.

  10. Constructed Wetlands for Industry in Thailand

    E-Print Network [OSTI]

    - Establish in 1998 - Research focuses in ­ Management/Treatment/Disposal ­ Bioremediation / Phytoremediation treatment ponds 1 water quality improvement pond #12;23/05/2012 5 The Constructed Wetland System - Shallow

  11. A coastal hazards data base for the US Gulf Coast

    SciTech Connect (OSTI)

    Daniels, R.C.; Gornitz, V.M.; White, T.W.

    1994-06-01

    This document describes the contents of a digital data base that may be used to identify coastlines along the US Gulf Coast at risk to sea-level rise. The data base integrates point, line, and polygon data for the US Gulf Coast into 0.25{degree} latitude by 0.25{degree} longitude grid cells and into 1:2,000,000 digitized line segments that can be used by raster or vector geographic information systems (GIS) as well as by non-GIS data base systems. Each coastal grid cell and line segment contains data on elevation, geology, geomorphology, sea-level trends, shoreline displacement (erosion/accretion), tidal ranges, and wave heights. To allow for the identification of coastlines at risk from sea-level rise, 7 of the 22 original data variables in this data base were classified by vulnerability and used to create 7 relative risk variables. These relative risk variables range in value from 1 to 5 and may be used to calculate a coastal vulnerability index for each grid cell and/or line segment. The data for these 29 variables (i.e., the 22 original variables and 7 risk variables) have been placed into the following data formats: (1) Gridded polygon data for the 22 original data variables. Data include elevation, geology, geomorphology, sea-level trends, shoreline displacement (erosion/accretion), tidal ranges, and wave heights. (2) Gridded polygon data for the seven classified risk variables. The risk variables are classified versions of: mean coastal elevation, geology, geomorphology, local subsidence trend, mean shoreline displacement, maximum tidal range, and maximum significant wave height. (3) 1:2,000,000 line segment data containing the 29 data variables (the 22 original data variables and the seven classified risk variables). (4) Supplemental point data for the stations used in calculating the sea-level trend and tidal range data sets. (5) Supplemental line segment data containing a 1:2,000,000 digitized coastline of the US Gulf Coast as defined by this document.

  12. Tidal Forces in Naked Singularity Backgrounds

    E-Print Network [OSTI]

    Goel, Akash; Roy, Pratim; Sarkar, Tapobrata

    2015-01-01

    The end stage of a gravitational collapse process can generically result in a black hole or a naked singularity. Here we undertake a comparative analysis of the nature of tidal forces in these backgrounds. The effect of such forces is generically exemplified by the Roche limit, which predicts the distance within which a celestial object disintegrates due to the tidal effects of a second more massive object. In this paper, using Fermi normal coordinates, we numerically compute the Roche limit for a class of non-rotating naked singularity backgrounds, and compare them with known results for Schwarzschild black holes. Our analysis indicates that there might be substantially large deviations in the magnitudes of tidal forces in naked singularity backgrounds, compared to the black hole cases. If observationally established, these can prove to be an effective indicator of the nature of the singularity at a galactic centre.

  13. TIDAL TURBULENCE SPECTRA FROM A COMPLIANT MOORING

    SciTech Connect (OSTI)

    Thomson, Jim; Kilcher, Levi; Richmond, Marshall C.; Talbert, Joe; deKlerk, Alex; Polagye, Brian; Guerra, Maricarmen; Cienfuegos, Rodrigo

    2013-06-13

    A compliant mooring to collect high frequency turbulence data at a tidal energy site is evaluated in a series of short demon- stration deployments. The Tidal Turbulence Mooring (TTM) improves upon recent bottom-mounted approaches by suspend- ing Acoustic Doppler Velocimeters (ADVs) at mid-water depths (which are more relevant to tidal turbines). The ADV turbulence data are superior to Acoustic Doppler Current Profiler (ADCP) data, but are subject to motion contamination when suspended on a mooring in strong currents. In this demonstration, passive stabilization is shown to be sufficient for acquiring bulk statistics of the turbulence, without motion correction. With motion cor- rection (post-processing), data quality is further improved; the relative merits of direct and spectral motion correction are dis- cussed.

  14. Tidal analysis of water level in continental boreholes Version 2.2

    E-Print Network [OSTI]

    Brodsky, Emily

    tidal analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.3.1 The "credo

  15. Assessment of Energy Production Potential from Tidal Streams...

    Broader source: Energy.gov (indexed) [DOE]

    project documented in this report created a national database of tidal stream energy potential, as well as a GIS tool usable by industry in order to accelerate the market for tidal...

  16. The rotation and fracture history of Europa from modeling of tidal-tectonic processes

    E-Print Network [OSTI]

    Rhoden, Alyssa Rose

    2011-01-01

    the tidal stresses. They adopted a power-law viscoelasticpower of the model. However, the mechanics of tidal walking

  17. Application of integrated constructed wetlands for contaminant treatment and diffusion 

    E-Print Network [OSTI]

    Dong, Yu

    2013-07-01

    The sediment accumulation is an important characteristic in the ageing process of integrated constructed wetlands (ICW). Retained nutrient and other contaminants in wetland sediments have the potential to be remobilized ...

  18. Delineating wetlands using geographic information system and remote sensing technologies 

    E-Print Network [OSTI]

    Villeneuve, Julie

    2006-04-12

    During the last century wetlands have considerably decreased. The principal cause is urbanization, especially in large urban regions such as the Houston area. In order to protect the remaining wetlands, they have to be ...

  19. Zarillo, G. A., and Brehin, F. G. A. 2007. Hydrodynamic and Morphologic Modeling at Sebastian Inlet, FL. Proceedings Coastal Sediments '07 Conference, ASCE Press, Reston,

    E-Print Network [OSTI]

    US Army Corps of Engineers

    Inlet, FL. Proceedings Coastal Sediments '07 Conference, ASCE Press, Reston, VA, 1297-1310. HYDRODYNAMIC Modeling System (CMS) to investigate the morphological response to time varying forcing, sediment texture evolution of tidal inlet shoals is an important management tool, since they control sediment budgets. Inlet

  20. Tidal networks 2. Watershed delineation and comparative network morphology

    E-Print Network [OSTI]

    Fagherazzi, Sergio

    of three, we quantify various tidal network properties including common power law relationships which have common power law relationships quantified for terrestrial systems to tidal systems and use these analysesTidal networks 2. Watershed delineation and comparative network morphology Andrea Rinaldo,1 Sergio

  1. Enhancing Electrical Supply by Pumped Storage in Tidal Lagoons

    E-Print Network [OSTI]

    MacKay, David J.C.

    to demand into high­value demand­following power; and second, it can simultaneously serve as a tidal powerEnhancing Electrical Supply by Pumped Storage in Tidal Lagoons David J.C. MacKay Cavendish/3/07 Summary The principle that the net energy delivered by a tidal pool can be increased by pumping extra

  2. Tidal networks 3. Landscape-forming discharges and studies

    E-Print Network [OSTI]

    Fagherazzi, Sergio

    Tidal networks 3. Landscape-forming discharges and studies in empirical geomorphic relationships peak ebb and flood discharges throughout a tidal network and use this model to investigate scaling flows are driven by spring (astronomical) tidal fluctuations (rather than precipitation- induced runoff

  3. Rotational stability of tidally deformed planetary I. Matsuyama1

    E-Print Network [OSTI]

    Nimmo, Francis

    Rotational stability of tidally deformed planetary bodies I. Matsuyama1 and F. Nimmo2 Received 11 consider the true polar wander (rotational variations driven by mass redistribution) of tidally deformed planetary bodies. The rotation pole of bodies without tidal deformation is stabilized by the component

  4. Research papers Tidal characteristics of the gulf of Tonkin

    E-Print Network [OSTI]

    calibration derived from a set of sensitivity experiments to model parameters. The tidal energy budgetResearch papers Tidal characteristics of the gulf of Tonkin Nguyen Nguyet Minh a,c , Marchesiello of this study is to revisit the dominant physical processes that characterize tidal dynamics in the Gulf

  5. San Francisco Estuary Wetlands Regional Monitoring Program Plan

    E-Print Network [OSTI]

    San Francisco Estuary Wetlands Regional Monitoring Program Plan: Version 1 Framework and Protocols Wetlands Regional Monitoring Program Steering Committee Compiled and Edited by Joshua N. Collins, PhD San ................. 91 #12;#12;Wetlands Regional Monitoring Program Plan 2002 Executive Summary i San Francisco Estuary

  6. STUDY QUESTIONS WFS 340: Wetlands Ecology and Management

    E-Print Network [OSTI]

    Gray, Matthew

    of jurisdictional wetlands. 2) Know the provision of the Food Security Act that penalizes farmers for cultivating wetland. 2) Know low-water depth that defines the beginning of the deepwater (aquatic) system. 3) Know of aerenchyma. Wetland Regulation 1) Know the Federal legislative act that prevents the filling

  7. Dissecting the pressure field in tidal flow

    E-Print Network [OSTI]

    Dissecting the pressure field in tidal flow past a headland: When is form drag "real?" Sally Warner of oscillating flow H L HL velocity form drag power average power floodslack work done on system #12;0 0 0 0 90 180 270 360 90 180 270 360 0 degrees Drag of oscillating flow H L HL velocity form drag power average

  8. del Moral--Primary Successional Wetland--1 PREDICTABILITY OF PRIMARY SUCCESSIONAL WETLANDS ON PUMICE,

    E-Print Network [OSTI]

    del Moral, Roger

    % Salix cover were internally more similar than those with less than 10% Salix cover, suggesting wetlands examined by Titus et al. (1999). The purposes are to deter- mine if increasing Salix dominance has

  9. An Evaluation of the Interior Wetlands

    E-Print Network [OSTI]

    , · evaluate the biological, economic and social impacts of the program components. The evaluation of the IWP, economic and social impacts of the program. Actual results are evaluated against the anticipated benefits#12;An Evaluation of the Interior Wetlands Program Accomplishments and Impacts to Date Executive

  10. An Evaluation of the Interior Wetlands

    E-Print Network [OSTI]

    ) in relation to the objectives established in the Strategic Plan; and, · evaluate the biological, economic of the program. (b) Program Impacts: The evaluation examines the ecological, economic and social impacts#12;An Evaluation of the Interior Wetlands Program Accomplishments and Impacts to Date Prepared

  11. Constructed wetlands for industry and commerce

    E-Print Network [OSTI]

    of pollution sources and water quality reductions needed Increasing Concentration Treatment & dilution Self drainage Resource recovery #12;23/05/2012 2 How do constructed wetlands improve water quality? Treatment concentration Pollutants & pond size Land take for pond treatment Suspended solids P oil PAHs Source control

  12. Tidal heating in multilayered terrestrial exoplanets

    SciTech Connect (OSTI)

    Henning, Wade G.; Hurford, Terry

    2014-07-01

    The internal pattern and overall magnitude of tidal heating for spin-synchronous terrestrial exoplanets from 1 to 2.5 R{sub E} is investigated using a propagator matrix method for a variety of layer structures. Particular attention is paid to ice-silicate hybrid super-Earths, where a significant ice mantle is modeled to rest atop an iron-silicate core, and may or may not contain a liquid water ocean. We find multilayer modeling often increases tidal dissipation relative to a homogeneous model, across multiple orbital periods, due to the ability to include smaller volume low viscosity regions, and the added flexure allowed by liquid layers. Gradations in parameters with depth are explored, such as allowed by the Preliminary Earth Reference Model. For ice-silicate hybrid worlds, dramatically greater dissipation is possible beyond the case of a silicate mantle only, allowing non-negligible tidal activity to extend to greater orbital periods than previously predicted. Surface patterns of tidal heating are found to potentially be useful for distinguishing internal structure. The influence of ice mantle depth and water ocean size and position are shown for a range of forcing frequencies. Rates of orbital circularization are found to be 10-100 times faster than standard predictions for Earth-analog planets when interiors are moderately warmer than the modern Earth, as well as for a diverse range of ice-silicate hybrid super-Earths. Circularization rates are shown to be significantly longer for planets with layers equivalent to an ocean-free modern Earth, as well as for planets with high fractions of either ice or silicate melting.

  13. Tidal Energy Resource Assessment | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCEDInstallers/ContractorsPhotovoltaicsState ofSavings for Specific2HeldTidal Energy Resource

  14. Proceedings of Coastal Zone 07 Portland, Oregon

    E-Print Network [OSTI]

    Wright, Dawn Jeannine

    MODEL FOR PUGET SOUND: A CLASSROOM EXPERIENCE Timothy Nyerges, Scott Dudgeon, Tyanne Faulkes information systems, coastal zone management INTRODUCTION Coastal zone management (CZM) requires robust about how to management coastal resources (Wright and Scholz 2005). CZM applications of geographic

  15. Department of Environmental Conservation, University of Massachusetts-Amherst Concentration in Water, Wetlands and Watersheds 1

    E-Print Network [OSTI]

    Schweik, Charles M.

    on water supply and allocation, water quality management, aquatic toxicology and bioremediation, stormwater in Water, Wetlands and Watersheds 1 Environmental Conservation Graduate Program Water, Wetlands want scientific training in the multi-disciplinary field of water, wetlands and watershed conservation

  16. A Comparison of Vegetation in Artificially Isolated Wetlands on West Galveston Island 

    E-Print Network [OSTI]

    Wilson, Ashley

    2012-07-16

    The purpose of this study was to compare vegetation systems among three artificially isolated wetlands on the west end of Galveston Island. Sample sites were identified as isolated wetlands and anthropogenic impact was observed. Wetland plant...

  17. Phosphorus water quality model evaluation and comparison for natural and constructed wetlands 

    E-Print Network [OSTI]

    Paasch, Mary Margaret

    1998-01-01

    model, and the detailed ecosystem model, were evaluated at three wetland sites across the U.S. The three sites included: Boney Marsh Experimental Area, Florida; Jackson Bottom Experimental Wetlands, Oregon; and the Des Plaines River Wetland Demonstration...

  18. A coastal hazards data base for the US East Coast

    SciTech Connect (OSTI)

    Gornitz, V.M. . Goddard Inst. for Space Studies); White, T.W. ); Daniels, R.C. )

    1992-08-01

    This document describes the contents of a digital data base that may be used by raster or vector geographic information systems (GIS) and non-GIS data bases to assess the risk of coastlines to erosion or sea level rise. The data base integrates point, line, and polygon data for the US East Coast into 0.250 latitude [times] 0.250 longitude grid cells. Each coastal grid cell contains data on geology, geomorpholog,elevation, wave heights, tidal ranges, shoreline displacement (erosion), and sea-level trends. These data are available as a Numeric Data Package (NDP), from the Carbon Dioxide Information Analysis Center, consisting of this document and a set of computerized data files. The documentation contains information on the methods used in calculating each variable, detailed descriptions of file contents and formats, and a discussion of the sources, restrictions, and limitations of the data. The data files are available on magnetic tape, on floppy diskettes, or through INTERNET.

  19. A coastal hazards data base for the US East Coast

    SciTech Connect (OSTI)

    Gornitz, V.M.; White, T.W.; Daniels, R.C.

    1992-08-01

    This document describes the contents of a digital data base that may be used by raster or vector geographic information systems (GIS) and non-GIS data bases to assess the risk of coastlines to erosion or sea level rise. The data base integrates point, line, and polygon data for the US East Coast into 0.250 latitude {times} 0.250 longitude grid cells. Each coastal grid cell contains data on geology, geomorpholog,elevation, wave heights, tidal ranges, shoreline displacement (erosion), and sea-level trends. These data are available as a Numeric Data Package (NDP), from the Carbon Dioxide Information Analysis Center, consisting of this document and a set of computerized data files. The documentation contains information on the methods used in calculating each variable, detailed descriptions of file contents and formats, and a discussion of the sources, restrictions, and limitations of the data. The data files are available on magnetic tape, on floppy diskettes, or through INTERNET.

  20. Reference Model #1 - Tidal Energy: Resource Dr. Brian Polagye

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    constituents, as well as the aharmonic response to these currents induced by local topography and bathymetry. Aharmonic currents are not described by tidal constituents, but are...

  1. First Commercial, Grid-Connected, Hydrokinetic Tidal Energy Project...

    Office of Science (SC) Website

    First Commercial, Grid-Connected, Hydrokinetic Tidal Energy Project in North America Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) SBIR...

  2. Science Serving Hawaii's Coastal Communities

    E-Print Network [OSTI]

    of their coastal habitats and ecosystems. UH Sea Grant is a unit of the prestigious School of Ocean and Earth, and opportunities. Commitment to Educating Tomorrow's Workforce The UH Sea Grant graduate trainee program supports the excellence of Sea Grant and its longstanding commitment to coastal sustainability by awarding it seven new

  3. Investigation of Tidal Exchange and the Formation of Tidal Vortices at Aransas Pass, Texas, USA 

    E-Print Network [OSTI]

    Whilden, Kerri Ann

    2015-08-11

    Laboratory and field measurements are presented as part of a study of tidal exchange through Aransas Pass, Texas. At the mouth of Aransas Pass, the input of circulation by the ebb tide forces the formation of a starting-jet dipole vortex...

  4. Wetland Plant Influence on Sediment Ecosystem Structure and Trophic Function

    E-Print Network [OSTI]

    Whitcraft, Christine R.

    2007-01-01

    alterniflora and benthic microalgae in salt marsh food webs:assemblages of marine wetland microalgae and photosyntheticalternijlora and benthic microalgae in salt marsh food webs:

  5. Wetland plant influence on sediment ecosystem structure and trophic function

    E-Print Network [OSTI]

    Whitcraft, Christine René

    2007-01-01

    alterniflora and benthic microalgae in salt marsh food webs:assemblages of marine wetland microalgae and photosyntheticalterniflora and benthic microalgae in salt marsh food webs:

  6. Tidal Energy Test Platform | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page| Open Energy Information Serbia-EnhancingEt Al., 2013)Open Energy Information ThreeTianDi GrowthTibagiTidalTest

  7. Wind and tidal response of a semi-enclosed bay, Bahía Concepción, Baja California

    E-Print Network [OSTI]

    Ponte, Aurélien L. S.

    2009-01-01

    J. H. , 1973: Tidal patterns and energy balance in the GulfTable 4.1). Because the tidal energy is similar between boththe mouth. Some energy is captured by the tidal analysis at

  8. Ocean Tidal Dissipation and its Role in Solar System Satellite Evolution

    E-Print Network [OSTI]

    Chen, Erinna

    2013-01-01

    Significant dissipation of tidal energy in the deep ocean2001. Estimates of M 2 tidal energy dissipation from TOPEX/e.g. the ocean kinetic energy and tidal dissipation, using a

  9. Snacktime for Hungry Black Holes: Theoretical Studies of the Tidal Disruption of Stars

    E-Print Network [OSTI]

    Strubbe, Linda Elisabeth

    2011-01-01

    tidal disruption rate as a function of pericenter distance at various energies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Tidal disruption rate as a function of pericenter distance at various energies2.5: Spectral energy distributions for tidal flares around a

  10. Binary asteroid systems: Tidal end states and estimates of material properties

    E-Print Network [OSTI]

    Taylor, PA; Margot, JL

    2011-01-01

    tidal evolution and then discuss stability limits and energyon tidal evolution. Angular momentum and energy content Theenergy can be dissipated as heat as a result of internal friction due to tidal ?

  11. Lyman Alpha Absorption and Tidal Debris

    E-Print Network [OSTI]

    Simon L. Morris

    1994-09-29

    The origin and evolution of structure in the Universe is one of the major questions occupying astronomers today. An understanding of the Lyalpha absorbers seen in QSO spectra is an important part of this program since such absorbers can be traced back to very high redshifts. Their mere existence places constraints on the physical state of the intergalactic medium. The discovery of Lyalpha absorbers at low redshift allows us to estimate for the first time what fraction of low redshift Lyalpha absorbers are (i) randomly distributed, (ii) distributed like galaxies but not physically associated with luminous objects, (iii) actually part of the halos of luminous galaxies, or (iv) tidal tails within galaxy groups. Results from the sightline to the QSO 3C273 suggest that the majority of the absorbers are not associated with galaxies, but that there is a significant subset that are. The absorbers associated with galaxies may be produced in enormous gaseous disks surrounding normal spiral galaxies, or may be tidal material bound up in small groups of galaxies

  12. ORIGINAL PAPER Predicting Avian Abundance Within and Across Tidal

    E-Print Network [OSTI]

    Kelly, Maggi

    ORIGINAL PAPER Predicting Avian Abundance Within and Across Tidal Marshes Using Fine Scientists 2010 Abstract Tidal marsh monitoring and restoration can benefit from the union of fine developed statistical models with relatively high explanatory power. In each case, models were improved

  13. Enhancing tidal harmonic analysis: Robust (hybrid L1 ) solutions

    E-Print Network [OSTI]

    Hickey, Barbara

    Enhancing tidal harmonic analysis: Robust (hybrid L1 =L2 ) solutions Keith E. Leffler Ã, David A 24 February 2008 Accepted 28 April 2008 Keywords: Tides Tidal analysis Harmonic analysis Robust is calculated from the power spectrum of the residual, a calculation that filters broad spectrum noise

  14. Tidal Conversion at a Submarine Ridge FRANOIS PTRLIS

    E-Print Network [OSTI]

    Young, William R.

    ). Satellite altimetry has shown deep-sea tidal energy losses concentrated at submarine ridges and island arcsTidal Conversion at a Submarine Ridge FRANÇOIS PÉTRÉLIS Laboratoire de Physique Statistique, Ecole received 30 July 2003, in final form 20 January 2004) ABSTRACT The radiative flux of internal wave energy

  15. CONTROL ID: 1187959 TITLE: Climate destabilization on tidally locked exoplanets

    E-Print Network [OSTI]

    CONTROL ID: 1187959 TITLE: Climate destabilization on tidally locked exoplanets PRESENTATION TYPE-zone rocky planets, should be tidally locked. We will discuss two different feedbacks that can destabilize cause a runaway climate shift. We use an idealized energy balance model to illustrate the scope

  16. Tidal deformation of a slowly rotating material body. External metric

    E-Print Network [OSTI]

    Philippe Landry; Eric Poisson

    2015-07-31

    We construct the external metric of a slowly rotating, tidally deformed material body in general relativity. The tidal forces acting on the body are assumed to be weak and to vary slowly with time, and the metric is obtained as a perturbation of a background metric that describes the external geometry of an isolated, slowly rotating body. The tidal environment is generic and characterized by two symmetric-tracefree tidal moments E_{ab} and B_{ab}, and the body is characterized by its mass M, its radius R, and a dimensionless angular-momentum vector \\chi^a new quantities, which we designate as rotational-tidal Love numbers. All these Love numbers are gauge invariant in the usual sense of perturbation theory, and all vanish when the body is a black hole.

  17. Confusion around the tidal force and the centrifugal force

    E-Print Network [OSTI]

    Matsuda, Takuya; Boffin, Henri M J

    2015-01-01

    We discuss the tidal force, whose notion is sometimes misunderstood in the public domain literature. We discuss the tidal force exerted by a secondary point mass on an extended primary body such as the Earth. The tidal force arises because the gravitational force exerted on the extended body by the secondary mass is not uniform across the primary. In the derivation of the tidal force, the non-uniformity of the gravity is essential, and inertial forces such as the centrifugal force are not needed. Nevertheless, it is often asserted that the tidal force can be explained by the centrifugal force. If we literally take into account the centrifugal force, it would mislead us. We therefore also discuss the proper treatment of the centrifugal force.

  18. Effects of Tidal Turbine Noise on Fish Hearing and Tissues - Draft Final Report - Environmental Effects of Marine and Hydrokinetic Energy

    SciTech Connect (OSTI)

    Halvorsen, Michele B.; Carlson, Thomas J.; Copping, Andrea E.

    2011-09-30

    Snohomish Public Utility District No.1 plans to deploy two 6 meter OpenHydro tidal turbines in Admiralty Inlet in Puget Sound, under a FERC pilot permitting process. Regulators and stakeholders have raised questions about the potential effect of noise from the turbines on marine life. Noise in the aquatic environment is known to be a stressor to many types of aquatic life, including marine mammals, fish and birds. Marine mammals and birds are exceptionally difficult to work with for technical and regulatory reasons. Fish have been used as surrogates for other aquatic organisms as they have similar auditory structures. This project was funded under the FY09 Funding Opportunity Announcement (FOA) to Snohomish PUD, in partnership with the University of Washington - Northwest National Marine Renewable Energy Center, the Sea Mammal Research Unit, and Pacific Northwest National Laboratory. The results of this study will inform the larger research project outcomes. Proposed tidal turbine deployments in coastal waters are likely to propagate noise into nearby waters, potentially causing stress to native organisms. For this set of experiments, juvenile Chinook salmon (Oncorhynchus tshawytscha) were used as the experimental model. Plans exist for prototype tidal turbines to be deployed into their habitat. Noise is known to affect fish in many ways, such as causing a threshold shift in auditory sensitivity or tissue damage. The characteristics of noise, its spectra and level, are important factors that influence the potential for the noise to injure fish. For example, the frequency range of the tidal turbine noise includes the audiogram (frequency range of hearing) of most fish. This study was performed during FY 2011 to determine if noise generated by a 6-m diameter OpenHydro turbine might affect juvenile Chinook salmon hearing or cause barotrauma. Naturally spawning stocks of Chinook salmon that utilize Puget Sound are listed as threatened (http://www.nwr.noaa.gov/ESA-Salmon-Listings/Salmon-Populations/Chinook/CKPUG.cfm); the fish used in this experiment were hatchery raised and their populations are not in danger of depletion. After they were exposed to simulated tidal turbine noise, the hearing of juvenile Chinook salmon was measured and necropsies performed to check for tissue damage. Experimental groups were (1) noise exposed, (2) control (the same handling as treatment fish but without exposure to tidal turbine noise), and (3) baseline (never handled). Experimental results indicate that non-lethal, low levels of tissue damage may have occurred but that there were no effects of noise exposure on the auditory systems of the test fish.

  19. Virginia Wetlands Report Center for Coastal Resources Management www.ccrm.vims.edu

    E-Print Network [OSTI]

    in shallow waters, it supports the growth of photosynthetic bottom-dwelling microalgae. These microalgae

  20. Soil Organic Matter of Natural and Restored Coastal Wetland Soils in Southern California

    E-Print Network [OSTI]

    Elgin, Barbara K.

    2012-01-01

    of natural and created marsh soils. J. Exp. Mar. Biol. Ecol.2007. Freshwater Input Structures Soil Properties, VerticalS.S. , Hoover, K.L. 1996. Soil properties of reference

  1. Microbial dynamics during intrinsic remediation of oil contaminated coastal wetland sediments (a microcosm study) 

    E-Print Network [OSTI]

    Thornburg, Nathaniel David

    2001-01-01

    was observed throughout the experiment, illustrating that oil was being intrinsically remediated. Kinetic analysis showed that the aliphatic and aromatic hydrocarbons had a half-life of 18 and 56 days, respectively. While MPN and GC-MS analysis showed...

  2. An evaluation of the potential of coastal wetlands for hurricane surge and wave energy reduction 

    E-Print Network [OSTI]

    Loder, Nicholas Mason

    2009-05-15

    potential, a segmented marsh may offer comparable surge protection to that of a continuous marsh. Wave heights are generally increased within the marsh due to the transmission of wave energy through marsh channels. Results presented in this thesis may assist...

  3. Soil Organic Matter of Natural and Restored Coastal Wetland Soils in Southern California

    E-Print Network [OSTI]

    Elgin, Barbara K.

    2012-01-01

    utilized a mixture of sewage sludge and clay as substratemixture of clay and sewage sludge, had higher organic matteradditional fill, whereas sewage sludge and the underlying

  4. RESEARCH ARTICLE Evaluating the effects of upstream lakes and wetlands

    E-Print Network [OSTI]

    and recalculated downstream lake phosphorus concentra- tions. We found that upstream lakes decreased the phosphorusRESEARCH ARTICLE Evaluating the effects of upstream lakes and wetlands on lake phosphorus of these inputs. In addition, the presence, connectivity, and configuration of upstream lakes and wetlands likely

  5. Wetland Conservation The Food Security Act was enacted on

    E-Print Network [OSTI]

    US Army Corps of Engineers

    Wetland Conservation Compliance #12;The Food Security Act was enacted on December 23, 1985. Title. · Developed to streamline wetland delineation process and promote consistency between the Clean Water Act and the Food Security Act. #12;1994 National Food Security Act Manual Procedures · Provided NRCS staff policy

  6. Exam Review WFS 340: Wetlands Ecology and Management

    E-Print Network [OSTI]

    Gray, Matthew

    of jurisdictional wetlands. 2) Know the provision of the Food Security Act that penalizes farmers for cultivating) Know low-water depth that defines the beginning of the deepwater (aquatic) system. 3) Know the 5 USACE of aerenchyma. Wetland Regulation 1) Know the Federal legislative act that prevents the filling

  7. Percentage of Wetlands Acreage Lost, 1780s1980s

    E-Print Network [OSTI]

    Lawrence, Deborah

    or impaired wetlands where possible. United States Office of Water EPA 843-F-01-002d Environmental Protection Office of Wetlands, September 2001 Agency Oceans and Watersheds (4502T) What Is the Status of Our Nation from urban, agricultural, silvicultural, and mining areas. ! Air pollution from cars, factories

  8. DIVISION S-10-WETLAND SOILS Methane Production and Emissions from Four Reclaimed and Pristine Wetlands

    E-Print Network [OSTI]

    Florida, University of

    DIVISION S-10-WETLAND SOILS Methane Production and Emissions from Four Reclaimed and Pristine% of the plant-mediated emissions. Potential CRi production rates were measured as a function of depth using soil samples obtained at 2-cm increments. Methane production rates were the same order of magni- tude at all

  9. Multi-scale modeling of Puget Sound using an unstructured-grid coastal ocean model: from tide flats to estuaries and coastal waters

    SciTech Connect (OSTI)

    Yang, Zhaoqing; Khangaonkar, Tarang

    2010-11-19

    Water circulation in Puget Sound, a large complex estuary system in the Pacific Northwest coastal ocean of the United States, is governed by multiple spatially and temporally varying forcings from tides, atmosphere (wind, heating/cooling, precipitation/evaporation, pressure), and river inflows. In addition, the hydrodynamic response is affected strongly by geomorphic features, such as fjord-like bathymetry and complex shoreline features, resulting in many distinguishing characteristics in its main and sub-basins. To better understand the details of circulation features in Puget Sound and to assist with proposed nearshore restoration actions for improving water quality and the ecological health of Puget Sound, a high-resolution (around 50 m in estuaries and tide flats) hydrodynamic model for the entire Puget Sound was needed. Here, a threedimensional circulation model of Puget Sound using an unstructured-grid finite volume coastal ocean model is presented. The model was constructed with sufficient resolution in the nearshore region to address the complex coastline, multi-tidal channels, and tide flats. Model open boundaries were extended to the entrance of the Strait of Juan de Fuca and the northern end of the Strait of Georgia to account for the influences of ocean water intrusion from the Strait of Juan de Fuca and the Fraser River plume from the Strait of Georgia, respectively. Comparisons of model results, observed data, and associated error statistics for tidal elevation, velocity, temperature, and salinity indicate that the model is capable of simulating the general circulation patterns on the scale of a large estuarine system as well as detailed hydrodynamics in the nearshore tide flats. Tidal characteristics, temperature/salinity stratification, mean circulation, and river plumes in estuaries with tide flats are discussed.

  10. Revising 10 CFR Part 1022 “Compliance with Floodplain and Wetland Environmental Review Requirements”

    Broader source: Energy.gov [DOE]

    Revising 10 CFR Part 1022 “Compliance with Floodplain and Wetland Environmental Review Requirements”

  11. Wetlands Research Program Technical Report Y-87-1 (on-line edition) Corps of Engineers

    E-Print Network [OSTI]

    US Army Corps of Engineers

    Wetlands Research Program Technical Report Y-87-1 (on-line edition) Corps of Engineers Wetlands Research Program identify the area under which the report was prepared: Task Task CP Critical Processes RE;Wetlands Research Program Technical Report Y-87-1 January 1987 Corps of Engineers Wetlands Delineation

  12. Disc formation from stellar tidal disruptions

    E-Print Network [OSTI]

    Bonnerot, Clément; Lodato, Giuseppe; Price, Daniel J

    2015-01-01

    The potential of tidal disruption of stars to probe otherwise quiescent supermassive black holes cannot be exploited, if their dynamics is not fully understood. So far, the observational appearance of these events has been commonly derived from analytical extrapolations of the debris dynamical properties just after the stellar disruption. In this paper, we perform hydrodynamical simulations of stars in highly eccentric orbits, that follow the stellar debris after disruption and investigate their ultimate fate. We demonstrate that gas debris circularize on an orbital timescale because relativistic apsidal precession causes the stream to self-cross. The higher the eccentricity and/or the deeper the encounter, the faster is the circularization. If the internal energy deposited by shocks during stream self-interaction is readily radiated, the gas forms a narrow ring at the circularization radius. It will then proceed to accrete viscously at a super-Eddington rate, puffing up under radiation pressure. If instead c...

  13. Uncovering CDM halo substructure with tidal streams

    E-Print Network [OSTI]

    R. A. Ibata; G. F. Lewis; M. J. Irwin

    2001-10-31

    Models for the formation and growth of structure in a cold dark matter dominated universe predict that galaxy halos should contain significant substructure. Studies of the Milky Way, however, have yet to identify the expected few hundred sub-halos with masses greater than about 10^6 Msun. Here we propose a test for the presence of sub-halos in the halos of galaxies. We show that the structure of the tidal tails of ancient globular clusters is very sensitive to heating by repeated close encounters with the massive dark sub-halos. We discuss the detection of such an effect in the context of the next generation of astrometric missions, and conclude that it should be easily detectable with the GAIA dataset. The finding of a single extended cold stellar stream from a globular cluster would support alternative theories, such as self-interacting dark matter, that give rise to smoother halos.

  14. Tidal Downsizing model. I. Numerical methods: saving giant planets from tidal disruptions

    E-Print Network [OSTI]

    Nayakshin, Sergei

    2014-01-01

    Tidal Downsizing (TD) is a recently developed planet formation theory that supplements the classical Gravitational disc Instability (GI) model with planet migration inward and tidal disruptions of GI fragments in the inner regions of the disc. Numerical methods for a detailed population synthesis of TD planets are presented here. As an example application, the conditions under which GI fragments collapse faster than they migrate into the inner $a\\sim$ few AU disc are considered. It is found that most gas fragments are tidally or thermally disrupted unless (a) their opacity is $\\sim 3$ orders of magnitude less than the interstellar dust opacity at metallicities typical of the observed giant planets, or (b) the opacity is high but the fragments accrete large dust grains (pebbles) from the disc. Case (a) models produce very low mass solid cores ($M_{\\rm core} < 0.1$ Earth masses) and follow a negative correlation of giant planet frequency with host star metallicity. In contrast, case (b) models produce massiv...

  15. Palomar 5 and its Tidal Tails: A Search for New Members in the Tidal Stream

    E-Print Network [OSTI]

    Kuzma, Pete; Keller, Stefan; Maunder, Elizabeth

    2014-01-01

    In this paper we present the results of a search for members of the globular cluster Palomar 5 and its associated tidal tails. The analysis has been performed using intermediate and low resolution spectroscopy with the AAOmega spectrograph on the Anglo-Australian Telescope. Based on kinematics, line strength and photometric information, we identify 39 new red giant branch stars along $\\sim$20$^{\\circ}$ of the tails, a larger angular extent than has been previously studied. We also recover eight previously known tidal tail members. Within the cluster, we find seven new red giant and one blue horizontal branch members and confirm a further twelve known red giant members. In total, we provide velocity data for 67 stars in the cluster and the tidal tails. Using a maximum likelihood technique, we derive a radial velocity for Pal 5 of $-57.4 \\pm 0.3$ km s$^{-1}$ and a velocity dispersion of $1.2\\pm0.3$ km s$^{-1}$. We confirm and extend the linear velocity gradient along the tails of $1.0 \\pm 0.1$ km s$^{-1}$ deg$^...

  16. QER- Comment of America's Wetland Foundation

    Office of Energy Efficiency and Renewable Energy (EERE)

    Thank you for the opportunity to make oral remarks on behalf of the America¹s WETLAND Foundation in New Orleans on May 27, 2014 during the public comment period at the meeting held by the U.S. Department of Energy as the Secretariat for the Quadrennial Energy Review (QER). In follow up, attached is a summation of those comments, along with three reports released by the Foundation for your review that will provide information helpful to the committee. Please do not hesitate to contact me if there are questions or if more information is desired, Sidney Coffee

  17. Alaska ADEC Wetlands Regulation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EAand DaltonSolarOpen5 - Applications Jump to:Wetlands Regulation Jump to:

  18. Coastal ocean margins program

    SciTech Connect (OSTI)

    Not Available

    1988-12-01

    The marine research program supported by the Office of Energy Research, Ecological Research Division, is focused to provide scientific information on major environmental issues facing development and expansion of most energy technologies and energy policy. These issues include waste disposal, siting/operations, and possible long term effects on global systems. The research is concentrated along the United States coastal margins where marine waters provide abundant food and resources while assimilating discharges from atmospheric, terrestrial, and aquatic sources. The program focuses on the formation and transport of particles within the waters of the continental shelf and the fate of these particles, whether on the shelf, on the slope, or in the open ocean. The program is conducted with multidisciplinary teams of researchers who investigate water mass movements, biological productivity, and naturally forming particles, as well as contaminant transport, to develop a clear understanding of the exchanges of contaminants and other materials that take place between continental shelf and open ocean waters. Seventy-five percent of the projects are funded to university grantees and twenty-five percent to National Laboratories.

  19. Part II, Conclusion: Ecology and Regional Context of Tidal Wetlands in the San Francisco Bay National Estuarine Research Reserve

    E-Print Network [OSTI]

    Ferner, Matthew C.

    2012-01-01

    natural resources is critically important in the San Francisco Estuary (SFE) where recent human activities have had devastating effects

  20. Measurement of Tidal Form Drag Using Seafloor Pressure Sensors SALLY J. WARNER AND PARKER MACCREADY

    E-Print Network [OSTI]

    MacCready, Parker

    tides. The tidally averaged power removed from the tidal currents by form drag was 0.2 W m22 , whichMeasurement of Tidal Form Drag Using Seafloor Pressure Sensors SALLY J. WARNER AND PARKER MACCREADY the tidal form drag on a sloping ridge in 200 m of water that forms a 1-km headland at the surface in Puget

  1. Under consideration for publication in J. Fluid Mech. 1 Reflecting tidal wave beams and local

    E-Print Network [OSTI]

    were generated locally by a propagating beam of internal tidal energy which had originatedUnder consideration for publication in J. Fluid Mech. 1 Reflecting tidal wave beams and local generation mecha- nism: tidal flow over steep topography forces a propagating beam of internal tidal wave

  2. Hydrodynamics and Water Quality in Rodeo Lagoon, a Hypereutrophic Coastal Lagoon

    E-Print Network [OSTI]

    Cousins, Mary Alice Melugin

    2010-01-01

    Rodeo Lagoon lacks tidal energy. The pycnocline responded tobottom boundary layer. Tidal energy does not propagate intoof turbulent kinetic energy in an energetic tidal flow: Red

  3. Hydrodynamic analysis of a vertical axis tidal current turbine 

    E-Print Network [OSTI]

    Gretton, Gareth I.

    2009-01-01

    Tidal currents can be used as a predictable source of sustainable energy, and have the potential to make a useful contribution to the energy needs of the UK and other countries with such a resource. One of the technologies ...

  4. Numerical and Experimental Investigation of Tidal Current Energy Extraction 

    E-Print Network [OSTI]

    Sun, Xiaojing

    2008-01-01

    Numerical and experimental investigations of tidal current energy extraction have been conducted in this study. A laboratory-scale water flume was simulated using commercial computational fluid dynamics (CFD) code FLUENT. ...

  5. Geomorphic structure of tidal hydrodynamics in salt marsh creeks

    E-Print Network [OSTI]

    Fagherazzi, Sergio

    .1029/2007WR006289. 1. Introduction [2] Salt marshes are important transitional areas between terrestrial providing preferen- tial pathways for marsh flooding and drainage during the tidal cycle. Because

  6. Coastal and Waterfront Smart Growth and Hazard Mitigation Roundtable Report Coastal and Waterfront Smart Growth

    E-Print Network [OSTI]

    1 Coastal and Waterfront Smart Growth and Hazard Mitigation Roundtable Report Coastal and Waterfront Smart Growth and Hazard Mitigation Roundtable Report Achieving Hazard-Resilient Coastal & Waterfront Smart Growth #12;2 Achieving Hazard-Resilient Coastal & Waterfront Smart Growth www

  7. Sandia Energy - Tidal Energy Resource Assessment in the East River Tidal

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II)GeothermalFuel Magnetization andStochasticunique wind(CREW)Tidal

  8. A Bright Year for Tidal Disruptions?

    E-Print Network [OSTI]

    Metzger, Brian D

    2015-01-01

    When a star is tidally disrupted by a supermassive black hole (BH), roughly half of its mass falls back to the BH at super-Eddington rates. Being tenuously gravitationally bound and unable to cool radiatively, only a small fraction f_in few 1e4 K, converting the emission to optical/near-UV wavelengths where photons more readily escape due to the lower opacity. This can explain the unexpectedly low and temporally constant effective temperatures of optically-discovered TDE flares. For BHs with relatively high masses M_BH > 1e7 M_sun the ejecta can become ionized at an earlier stage, or for a wider range of viewing angles, producing a TDE flare which is instead dominated by thermal X-ray emission. We predict total radiated energies consistent with those of observed TDE flares, and ejecta velocities that agree with the measured emission line widths. The peak optical luminosity for M_BH wind, possibly contributing to the unexpected dearth of o...

  9. The Maine Coastal Current: Spring Climatological Circulation

    E-Print Network [OSTI]

    The Maine Coastal Current: Spring Climatological Circulation Daniel R. Lynch, Monica J. Holboke in the Gulf of Maine, with special emphasis on its coastal current in the periods March­April and May of Maine cyclonic circulation is persistent, with significant bimonthly modulation of key Maine Coastal

  10. Thermal Mediation in a Natural Littoral Wetland: Measurements and Modeling

    E-Print Network [OSTI]

    Andradottir, Hrund O.

    As a river flows through shallow littoral regions such as wetlands, forebays, and side arms, the temperature of the water is modified through atmospheric heat exchange. This process, which we call thermal mediation, can ...

  11. Conservation and Management of Vernal Pools/Temporary Wetlands

    E-Print Network [OSTI]

    Gray, Matthew

    Jargon · Temporary ponds · Ephemeral pools · Springs pools · Woodland pools · Semi-permanent ponds · Fishless ponds · Salamander ponds · Intermittent woodland pools · Seasonal forest ponds · Seasonally astatic waters · Geographically isolated wetlands · Vernal pools · Specifics- Carolina Bays, Karst ponds

  12. Coiled tubing flowline cuts wetlands disturbance

    SciTech Connect (OSTI)

    Coats, E.A.; Marinello, S.A.

    1993-12-01

    Operators in environmentally sensitive wetland areas of South Louisiana have used jointed, or stickpipe flowlines to transmit oil and gas to and from wellsites and production facilities. Recently, a new method featuring coiled tubing was introduced, using it as a recyclable gas flowline. The coiled tubing method eliminates potential environmental damage that could occur when stickpipe is used and it allows the tubing to be easily recovered and reused when the well is taken out of service. This article describes economic advantages of using coiled tubing and how its use simplified environmental constraints encountered in swamps. It is an expanded version of the authors` presentation to World Oil`s Coiled Tubing Conference, Houston, March, 1993.

  13. Coastal Ohio Wind Project

    SciTech Connect (OSTI)

    Gorsevski, Peter; Afjeh, Abdollah; Jamali, Mohsin; Bingman, Verner

    2014-04-04

    The Coastal Ohio Wind Project intends to address problems that impede deployment of wind turbines in the coastal and offshore regions of Northern Ohio. The project evaluates different wind turbine designs and the potential impact of offshore turbines on migratory and resident birds by developing multidisciplinary research, which involves wildlife biology, electrical and mechanical engineering, and geospatial science. Firstly, the project conducts cost and performance studies of two- and three-blade wind turbines using a turbine design suited for the Great Lakes. The numerical studies comprised an analysis and evaluation of the annual energy production of two- and three-blade wind turbines to determine the levelized cost of energy. This task also involved wind tunnel studies of model wind turbines to quantify the wake flow field of upwind and downwind wind turbine-tower arrangements. The experimental work included a study of a scaled model of an offshore wind turbine platform in a water tunnel. The levelized cost of energy work consisted of the development and application of a cost model to predict the cost of energy produced by a wind turbine system placed offshore. The analysis found that a floating two-blade wind turbine presents the most cost effective alternative for the Great Lakes. The load effects studies showed that the two-blade wind turbine model experiences less torque under all IEC Standard design load cases considered. Other load effects did not show this trend and depending on the design load cases, the two-bladed wind turbine showed higher or lower load effects. The experimental studies of the wake were conducted using smoke flow visualization and hot wire anemometry. Flow visualization studies showed that in the downwind turbine configuration the wake flow was insensitive to the presence of the blade and was very similar to that of the tower alone. On the other hand, in the upwind turbine configuration, increasing the rotor blade angle of attack reduced the wake size and enhanced the vortices in the flow downstream of the turbine-tower compared with the tower alone case. Mean and rms velocity distributions from hot wire anemometer data confirmed that in a downwind configuration, the wake of the tower dominates the flow, thus the flow fields of a tower alone and tower-turbine combinations are nearly the same. For the upwind configuration, the mean velocity shows a narrowing of the wake compared with the tower alone case. The downwind configuration wake persisted longer than that of an upwind configuration; however, it was not possible to quantify this difference because of the size limitation of the wind tunnel downstream of the test section. The water tunnel studies demonstrated that the scale model studies could be used to adequately produce accurate motions to model the motions of a wind turbine platform subject to large waves. It was found that the important factors that affect the platform is whether the platform is submerged or surface piercing. In the former, the loads on the platform will be relatively reduced whereas in the latter case, the structure pierces the wave free surface and gains stiffness and stability. The other important element that affects the movement of the platform is depth of the sea in which the wind turbine will be installed. Furthermore, the wildlife biology component evaluated migratory patterns by different monitoring systems consisting of marine radar, thermal IR camera and acoustic recorders. The types of radar used in the project are weather surveillance radar and marine radar. The weather surveillance radar (1988 Doppler), also known as Next Generation Radar (NEXRAD), provides a network of weather stations in the US. Data generated from this network were used to understand general migratory patterns, migratory stopover habitats, and other patterns caused by the effects of weather conditions. At a local scale our marine radar was used to complement the datasets from NEXRAD and to collect additional monitoring parameters such as passage rates, flight paths, flight directi

  14. Center for Sustainable Coastal Tourism

    E-Print Network [OSTI]

    . 34 No. 3 Beach Nourishment at Waikïkï Beach Seawater Air Conditioning in Waikïkï: What Does climate change could impact the state's tourism industry, the community's perceptions about seawater air conditioning in Waikïkï, the inaugural sustainable coastal tourism fellows, and much more. Cindy Knapman

  15. Evolution of Tidal Amplitudes in the Eastern Pacific Ocean

    E-Print Network [OSTI]

    Hickey, Barbara

    amplitudes may impact ocean mixing, nutrient supply, primary production, fisher- ies, and coastal erosion [Flick et al., 2003]. To understand the causes of the evolution of coastal tides, it is necessary) and semidiurnal (M2) constituents in the Eastern Pacific from Chile to Alaska (33ºS to 60ºN latitude). The only

  16. EQUATORIAL SUPERROTATION ON TIDALLY LOCKED EXOPLANETS

    SciTech Connect (OSTI)

    Showman, Adam P. [Department of Planetary Sciences and Lunar and Planetary Laboratory, University of Arizona, 1629 University Blvd., Tucson, AZ 85721 (United States); Polvani, Lorenzo M., E-mail: showman@lpl.arizona.edu [Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY (United States)

    2011-09-01

    The increasing richness of exoplanet observations has motivated a variety of three-dimensional (3D) atmospheric circulation models of these planets. Under strongly irradiated conditions, models of tidally locked, short-period planets (both hot Jupiters and terrestrial planets) tend to exhibit a circulation dominated by a fast eastward, or 'superrotating', jet stream at the equator. When the radiative and advection timescales are comparable, this phenomenon can cause the hottest regions to be displaced eastward from the substellar point by tens of degrees longitude. Such an offset has been subsequently observed on HD 189733b, supporting the possibility of equatorial jets on short-period exoplanets. Despite its relevance, however, the dynamical mechanisms responsible for generating the equatorial superrotation in such models have not been identified. Here, we show that the equatorial jet results from the interaction of the mean flow with standing Rossby waves induced by the day-night thermal forcing. The strong longitudinal variations in radiative heating-namely intense dayside heating and nightside cooling-trigger the formation of standing, planetary-scale equatorial Rossby and Kelvin waves. The Rossby waves develop phase tilts that pump eastward momentum from high latitudes to the equator, thereby inducing equatorial superrotation. We present an analytic theory demonstrating this mechanism and explore its properties in a hierarchy of one-layer (shallow-water) calculations and fully 3D models. The wave-mean-flow interaction produces an equatorial jet whose latitudinal width is comparable to that of the Rossby waves, namely the equatorial Rossby deformation radius modified by radiative and frictional effects. For conditions typical of synchronously rotating hot Jupiters, this length is comparable to a planetary radius, explaining the broad scale of the equatorial jet obtained in most hot-Jupiter models. Our theory illuminates the dependence of the equatorial jet speed on forcing amplitude, strength of friction, and other parameters, as well as the conditions under which jets can form at all.

  17. General relativistic tidal work for Papapetrou, Weinberg and Goldberg pseudotensors

    E-Print Network [OSTI]

    Lau Loi So

    2015-05-18

    In 1998 Thorne claimed that all pseudotensors give the same tidal work as the Newtonian theory. In 1999, Purdue used the Landau-Lifshitz pseudotensor to calculate the tidal heating and the result matched with the Newtonian gravity. Soon after in 2001, Favata employed the same method to examine the Einstein, Bergmann-Thomson and M{\\o}ller pseudotensors, all of them give the same result as Purdue did. Inspired by the work of Purdue and Favata, for the completeness, here we manipulate the tidal work for Papapetrou, Weinberg and Goldberg pseudotensors. We obtained the same tidal work as Purdue achieved. In addition, we emphasize that a suitable gravitational energy-momentum pseudotensor requires fulfill the inside matter condition and all of the classical pseudotensors pass this test except M$\\o$ller. Moreover, we constructed a general pseudotesnor which is modified by 13 linear artificial higher order terms combination with Einstein pseudotensor. We find that the result agrees with Thorne's prediction, i.e., relativistic tidal work is pseudotensor independent.

  18. NATIONAL GEODATABASE OF TIDAL STREAM POWER RESOURCE IN USA

    SciTech Connect (OSTI)

    Smith, Brennan T; Neary, Vincent S; Stewart, Kevin M

    2012-01-01

    A geodatabase of tidal constituents is developed to present the regional assessment of tidal stream power resource in the USA. Tidal currents are numerically modeled with the Regional Ocean Modeling System (ROMS) and calibrated with the available measurements of tidal current speeds and water level surfaces. The performance of the numerical model in predicting the tidal currents and water levels is assessed by an independent validation. The geodatabase is published on a public domain via a spatial database engine with interactive tools to select, query and download the data. Regions with the maximum average kinetic power density exceeding 500 W/m2 (corresponding to a current speed of ~1 m/s), total surface area larger than 0.5 km2 and depth greater than 5 m are defined as hotspots and documented. The regional assessment indicates that the state of Alaska (AK) has the largest number of locations with considerably high kinetic power density, followed by, Maine (ME), Washington (WA), Oregon (OR), California (CA), New Hampshire (NH), Massachusetts (MA), New York (NY), New Jersey (NJ), North and South Carolina (NC, SC), Georgia (GA), and Florida (FL).

  19. Variability in tidal disruption events: gravitationally unstable streams

    E-Print Network [OSTI]

    Coughlin, Eric R

    2015-01-01

    We present simulations of the tidal disruption of a solar mass star by a $10^6M_{\\odot}$ black hole. These, for the first time, cover the full time evolution of the tidal disruption event, starting well before the initial encounter and continuing until more than 90% of the bound material has returned to the vicinity of the hole. Our results are compared to the analytical prediction for the rate at which tidally-stripped gas falls back. We find that, for our chosen parameters, the overall scaling of the fallback rate, $\\dot{M}_{\\rm{fb}}$, closely follows the canonical $t^{-5/3}$ power-law. However, our simulations also show that the self-gravity of the tidal stream, which dominates the tidal gravity of the hole at large distances, causes some of the debris to recollapse into bound fragments before returning to the hole. This causes $\\dot{M}_{\\rm{fb}}$ to vary significantly around the $t^{-5/3}$ average. We discuss the implications of our findings in the context of the event Swift J1644+57.

  20. TIDAL DISRUPTION FLARES: THE ACCRETION DISK PHASE

    SciTech Connect (OSTI)

    Montesinos Armijo, Matias; De Freitas Pacheco, Jose A. [Observatoire de la Cote d'Azur, Laboratoire Cassiopee, Universite de Nice Sophia-Antipolis Bd de l'Observatoire, BP 4229, 06304 Nice Cedex 4 (France)

    2011-08-01

    The evolution of an accretion disk, formed as a consequence of the disruption of a star by a black hole, is followed by solving numerically hydrodynamic equations. The present investigation aims to study the dependence of resulting light curves on dynamical and physical properties of such a transient disk during its existence. One of the main results derived from our simulations is that blackbody fits of X-ray data tend to overestimate the true mean disk temperature. In fact, the temperature derived from blackbody fits should be identified with the color X-ray temperature rather than the average value derived from the true temperature distribution along the disk. The time interval between the beginning of the circularization of the bound debris and the beginning of the accretion process by the black hole is determined by the viscous (or accretion) timescale, which also fixes the rising part of the resulting light curve. The luminosity peak coincides with the beginning of matter accretion by the black hole and the late evolution of the light curve depends on the evolution of the debris fallback rate. Peak bolometric luminosities are in the range 10{sup 45}-10{sup 46} erg s{sup -1}, whereas peak luminosities in soft X-rays (0.2-2.0 keV) are typically one order of magnitude lower. The typical timescale derived from our preferred models for the flare luminosity to decay by two orders of magnitude is about 3-4 yr. Predicted soft X-ray light curves reproduce quite well data on galaxies in which a variable X-ray emission possibly related to a tidal event was detected. In the cases of NGC 3599 and IC 3599, data are reproduced well by models defined by a black hole with mass {approx}10{sup 7} M{sub sun} and a disrupted star of about 1 solar mass. The X-ray variation observed in XMMSL1 is consistent with a model defined by a black hole with mass {approx}3 x 10{sup 6} M{sub sun} and a disrupted star of 1 solar mass, while that observed in the galaxy situated in the cluster A1689 is consistent with a model including a black hole of {approx}10{sup 7} M{sub sun} and a disrupted star of {approx}0.5 M{sub sun}.

  1. The physical role of transverse deep zones in improving constructed treatment wetland performance

    E-Print Network [OSTI]

    Lightbody, Anne F. (Anne Fraser), 1977-

    2007-01-01

    Velocity heterogeneity is often present in wetland systems and results in some influent water remaining in the wetland for less than the expected residence time. This phenomenon, known as short-circuiting, alters the ...

  2. A spatial characterization of the Sagittarius dwarf galaxy tidal tails

    SciTech Connect (OSTI)

    Newby, Matthew; Cole, Nathan; Newberg, Heidi Jo; Willett, Benjamin [Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, Troy, NY 12180 (United States); Desell, Travis [Department of Computer Science, U. of North Dakota, Grand Forks, ND 52802 (United States); Magdon-Ismail, Malik; Szymanski, Boleslaw; Varela, Carlos [Department of Computer Science, Rensselaer Polytechnic Institute, Troy, NY 12180 (United States); Yanny, Brian, E-mail: newbym2@rpi.edu, E-mail: heidi@rpi.edu [Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510 (United States)

    2013-06-01

    We measure the spatial density of F turnoff stars in the Sagittarius dwarf tidal stream, from Sloan Digital Sky Survey data, using statistical photometric parallax. We find a set of continuous, consistent parameters that describe the leading Sgr stream's position, direction, and width for 15 stripes in the north Galactic cap, and three stripes in the south Galactic cap. We produce a catalog of stars that has the density characteristics of the dominant leading Sgr tidal stream that can be compared with simulations. We find that the width of the leading (north) tidal tail is consistent with recent triaxial and axisymmetric halo model simulations. The density along the stream is roughly consistent with common disruption models in the north, but possibly not in the south. We explore the possibility that one or more of the dominant Sgr streams has been misidentified, and that one or more of the ''bifurcated'' pieces is the real Sgr tidal tail, but we do not reach definite conclusions. If two dwarf progenitors are assumed, fits to the planes of the dominant and ''bifurcated'' tidal tails favor an association of the Sgr dwarf spheroidal galaxy with the dominant southern stream and the ''bifurcated'' stream in the north. In the north Galactic cap, the best fit Hernquist density profile for the smooth component of the stellar halo is oblate, with a flattening parameter q = 0.53, and a scale length of r {sub 0} = 6.73. The southern data for both the tidal debris and the smooth component of the stellar halo do not match the model fits to the north, although the stellar halo is still overwhelmingly oblate. Finally, we verify that we can reproduce the parameter fits on the asynchronous MilkyWay@home volunteer computing platform.

  3. Sunlight inactivation of fecal indicator bacteria in open-water unit process wetlands

    E-Print Network [OSTI]

    Nguyen, Mi T.

    2015-01-01

    water wetlands, utilizes geotextile fabrics on the wetlandwas lined with concrete and geotextile fabric to prevent the

  4. Laboratory Analysis of Vortex Dynamics For Shallow Tidal Inlets 

    E-Print Network [OSTI]

    Whilden, Kerri Ann

    2010-10-12

    OF VORTEX DYNAMICS FOR SHALLOW TIDAL INLETS A Thesis by KERRI ANN WHILDEN Submitted to the O ce of Graduate Studies of Texas A&M University in partial ful llment of the requirements for the degree of MASTER OF SCIENCE August 2009 Major Subject: Ocean... Engineering LABORATORY ANALYSIS OF VORTEX DYNAMICS FOR SHALLOW TIDAL INLETS A Thesis by KERRI ANN WHILDEN Submitted to the O ce of Graduate Studies of Texas A&M University in partial ful llment of the requirements for the degree of MASTER OF SCIENCE Approved...

  5. MHK Projects/Highlands Tidal Energy Project | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource HistoryScenarios Towards 2050 JumpCoos Bay OPTHalf Moon Cove TidalTidal Energy

  6. MHK Projects/Housatonic Tidal Energy Plant | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource HistoryScenarios Towards 2050 JumpCoos Bay OPTHalf Moon Cove TidalTidalHope

  7. On the Natural Frequency of Tidal Current Power Systems - A Discussion...

    Office of Scientific and Technical Information (OSTI)

    On the Natural Frequency of Tidal Current Power Systems - A Discussion of Sea Testing Citation Details In-Document Search Title: On the Natural Frequency of Tidal Current Power...

  8. Snacktime for Hungry Black Holes: Theoretical Studies of the Tidal Disruption of Stars

    E-Print Network [OSTI]

    Strubbe, Linda Elisabeth

    2011-01-01

    bound gas onto the BH powers the tidal disruption flare, andof an X-ray Power-law The candidate tidal disruption eventstidal disruption spectra will contain a high-energy power-

  9. Assessment of Projected Life-Cycle Costs for Wave, Tidal, Ocean...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Assessment of Projected Life-Cycle Costs for Wave, Tidal, Ocean Current, and In-Stream Hydrokinetic Power Assessment of Projected Life-Cycle Costs for Wave, Tidal, Ocean Current,...

  10. Assessment of Energy Production Potential from Tidal Streams in the United States

    SciTech Connect (OSTI)

    Haas, Kevin A.; Fritz, Hermann M.; French, Steven P.; Smith, Brennan T.; Neary, Vincent

    2011-06-29

    The project documented in this report created a national database of tidal stream energy potential, as well as a GIS tool usable by industry in order to accelerate the market for tidal energy conversion technology.

  11. Modeling Tidal Freshwater Marsh Sustainability in the Sacramento–San Joaquin Delta Under a Broad Suite of Potential Future Scenarios

    E-Print Network [OSTI]

    Swanson, Kathleen M.; Drexler, Judith Z.; Fuller, Christopher C.; Schoellhamer, David H.

    2015-01-01

    Tidal Freshwater Marsh Sustainability in the Sacramento–Sanof pulsing events to sustainability. Estuaries Coasts 18:Evaluating tidal marsh sustainability in the face of sea-

  12. On the implications of incompressibility of the quantum mechanical wavefunction in the presence of tidal gravitational fields

    E-Print Network [OSTI]

    Minter, Stephen

    2010-01-01

    of being the tidal gravitational potential energy operator,the energy shift is negative, the tidal gravitational …eldtidal gravitational …eld is treated as a perturbation to the energy

  13. Conservative and reactive solute transport in constructed wetlands Steffanie H. Keefe,1

    E-Print Network [OSTI]

    Ryan, Joe

    ] Constructed wetlands are increasingly being used to provide supplemental treatment of wastewater treatment wastewater-dependent wetlands near Phoenix, Arizona, using a solute transport model with transient storage in constructed wetlands. Solutes are transported through primary flow conveying pathways in the main channel

  14. STUDY QUESTIONS FOR LECTURE EXAM WFS 340: Wetlands Ecology and Management

    E-Print Network [OSTI]

    Gray, Matthew

    of jurisdictional wetlands. 2) Know the provision of the Food Security Act that penalizes farmers for cultivating wetland. 2) Know low-water depth that defines the beginning of the deepwater (aquatic) system. 3) Know of aerenchyma. Wetland Regulation 1) Know the Federal legislative act that prevents the filling

  15. Constructed Wetlands Research Group meeting Forth Suite, SEPA Riccarton Office, Edinburgh EH14 4AP

    E-Print Network [OSTI]

    Heal, Kate

    .uk/our-work/wetland-habitats/wetlands-in-my-backyard). 3. Presentations and discussion Seven presentations were made to the group on various aspects1 Minutes of Constructed Wetlands Research Group meeting Forth Suite, SEPA Riccarton Office of the group Kate Heal welcomed the participants and summarised the history and original aims of the CWRG

  16. Characterization of Section 404 Permit Mitigation Plans, Coastal Margin and Associated Watersheds, Upper Texas Coast 

    E-Print Network [OSTI]

    Conkey, April A.

    2010-01-14

    A predicted loss of agricultural rice-wetlands and increasing urbanization and development threatens the remaining freshwater wetlands along the upper Texas coast. To avoid, minimize, and mitigate wetland loss, the U.S. Army Corps of Engineers...

  17. An Estimate of Tidal Energy Lost to Turbulence at the Hawaiian Ridge JODY M. KLYMAK

    E-Print Network [OSTI]

    Balasubramanian, Ravi

    An Estimate of Tidal Energy Lost to Turbulence at the Hawaiian Ridge JODY M. KLYMAK Scripps an estimate of 3 1.5 GW of tidal energy lost to turbulence dissipation within 60 km of the ridge and Toole 1997). Another closely related question is that of where tidal energy gets removed from the ocean

  18. The E ect of Barriers on The Tidal Range in Yong Ming Tang

    E-Print Network [OSTI]

    interest in constructing tidal barrages, either to control the tide or to extract power. CorrespondinglyThe E ect of Barriers on The Tidal Range in Estuaries Yong Ming Tang Abstract Numerical simulations of the shallow water equations are used to study the e ect of topographic barriers on the tidal range

  19. Underestimation of the UK Tidal David J.C. MacKay

    E-Print Network [OSTI]

    MacKay, David J.C.

    there and would deliver up to 40 GW (peak). In this note, I present back­of­envelope models of tidal power special cases) the power in tidal waves is not equal to the kinetic energy flux across a plane. These backUnder­estimation of the UK Tidal Resource David J.C. MacKay Cavendish Laboratory, University

  20. Under-estimation of the UK Tidal David J.C. MacKay

    E-Print Network [OSTI]

    MacKay, David J.C.

    there and would deliver up to 40 GW (peak). In this note, I present back-of-envelope models of tidal power special cases) the power in tidal waves is not equal to the kinetic energy flux across a plane. These backUnder-estimation of the UK Tidal Resource David J.C. MacKay Cavendish Laboratory, University

  1. Three-Dimensional Tidal Flow in an Elongated, Rotating Basin CLINTON D. WINANT

    E-Print Network [OSTI]

    Winant, Clinton D.

    Three-Dimensional Tidal Flow in an Elongated, Rotating Basin CLINTON D. WINANT Integrative-dimensional tidal circulation in an elongated basin of arbitrary depth is described with a linear, constant parcels tend to corkscrew into and out of the basin in a tidal period. The axial flow is only weakly

  2. 2306 JOURNAL OF THE ATMOSPHERIC SCIENCES Chaotic Trajectories of Tidally Perturbed Inertial Oscillations

    E-Print Network [OSTI]

    Boss, Emmanuel S.

    2306 JOURNAL OF THE ATMOSPHERIC SCIENCES Chaotic Trajectories of Tidally Perturbed Inertial ABSTRACT It is shown that tidal perturbations of a geopotential height in an inviscid, barot~opic atmos formulation of both ~he free, inertial, and the tidally forced problems permitted the application o~ the twi

  3. MARCH 2007 1 Tidal mixing hotspots governed by rapid parametric subharmonic instability

    E-Print Network [OSTI]

    MacKinnon, Jennifer

    at 21S demonstrate a rapid transfer of energy (over only a few days) to waves of half the tidal the generation site; overall 40 % of the tidal energy is dissipated locally. Further simulations indicate.9nearly 80 % of tidal energy is dissipated locally. Poleward of the critical latitude, M2/2

  4. Internal hydraulic jumps and overturning generated by tidal flow over a tall steep ridge

    E-Print Network [OSTI]

    Klymak, Jody M.

    that tidal energy is both converted into internal waves, which radiate away from the topography, and used of tidal mixing for global climate models, the physical processes governing the transfer of energy fromInternal hydraulic jumps and overturning generated by tidal flow over a tall steep ridge Sonya Legg

  5. Are mesoscale eddies in shelf seas formed by baroclinic instability of tidal fronts?

    E-Print Network [OSTI]

    Williams, Ric

    Are mesoscale eddies in shelf seas formed by baroclinic instability of tidal fronts? G. Badin,1 R; accepted 23 July 2009; published 27 October 2009. [1] The formation of eddies along tidal fronts signals are dampened by air-sea interaction and eroded by wind and tidal mixing. High-resolution CTD

  6. Dissipation at tidal and seismic frequencies in a melt-free Moon U. H. Faul,2

    E-Print Network [OSTI]

    Nimmo, Francis

    Dissipation at tidal and seismic frequencies in a melt-free Moon F. Nimmo,1 U. H. Faul,2 and E. J. Successful models can reproduce the dissipation factor (Q) measured at both tidal and seismic frequencies, and the tidal Love numbers h2 and k2, without requiring any mantle melting. However, the frequency

  7. Tidal mixing around the Maritime continent: implications for1 paleoclimate simulations2

    E-Print Network [OSTI]

    into state-of-the-art climate models. Calculation of the tidal energy flux depends on 7 1 Tidal mixing around the Maritime continent: implications for1 paleoclimate simulations2, New Haven, CT, 06511 4 Abstract 5 Tidal mixing provides an important source

  8. Critical bifurcation of shallow microtidal landforms in tidal flats and salt marshes

    E-Print Network [OSTI]

    Fagherazzi, Sergio

    Critical bifurcation of shallow microtidal landforms in tidal flats and salt marshes Sergio by the Editorial Board April 14, 2006 (received for review September 25, 2005) Shallow tidal basins are characterized by extensive tidal flats and salt marshes that lie within specific ranges of elevation, whereas

  9. Seasonal variations of semidiurnal tidal perturbations in mesopause region temperature and zonal and meridional winds above

    E-Print Network [OSTI]

    to conserve wave energy. When propagating into the MLT region, the horizontal wind tidal amplitude can reachSeasonal variations of semidiurnal tidal perturbations in mesopause region temperature and zonal, Colorado (40.6°N, 105.1°W). The observed monthly results are in good agreement with MF radar tidal

  10. Europa: Tidal heating of upwelling thermal plumes and the origin of lenticulae and chaos melting

    E-Print Network [OSTI]

    Head III, James William

    ; Pappalardo and Head, 2001], and 3) a seafloor plume model in which tidal energy focused in the silicate ice in the shallow crust of Europa. We show that tidal energy can be preferentially focused in risingEuropa: Tidal heating of upwelling thermal plumes and the origin of lenticulae and chaos melting

  11. Tidal and Wind Mixing versus Thermal Stratification in the South Atlantic Bight.

    E-Print Network [OSTI]

    North Carolina at Chapel Hill, University of

    ) these fluctuations are controlled by the cycles of tidally forced mixing, heat flux, wind and river discharge. During overcome the tendency for tidal power to produce a well-mixed system". Additionally, they expressed some: heat flux, evaporation-precipitation, fresh water input, wind stress work, bottom tidal work

  12. Virtual Seafloor Reduces Internal Wave Generation by Tidal Flow Likun Zhang*

    E-Print Network [OSTI]

    the applicability of linear theory to global predictions of the conversion of tidal energy into internal wave energy of the energy budget of the oceans requires a determination of the efficiency of conversion of tidal energyVirtual Seafloor Reduces Internal Wave Generation by Tidal Flow Likun Zhang* and Harry L. Swinney

  13. Identifying Pollutant Sources in Tidally Mixed Systems: Case Study

    E-Print Network [OSTI]

    Winant, Clinton D.

    sitessas a primary source of fecal indicator bacteria in the water column and subtidal sediments and magnitude of pollutant sources potentially responsible for the impairment. While this information mayIdentifying Pollutant Sources in Tidally Mixed Systems: Case Study of Fecal Indicator Bacteria from

  14. Squeezars: Tidally powered stars orbiting a massive black hole

    E-Print Network [OSTI]

    Alexander, T; Alexander, Tal; Morris, Mark

    2003-01-01

    We propose that there exists a class of transient sources, "squeezars", which are stars caught in highly eccentric orbits around a massive (m<10^8 Mo) black hole (MBH), whose atypically high luminosity (up to a significant fraction of their Eddington luminosity) is powered by tidal interactions with the MBH. Their existence follows from the presence of a mass sink, the MBH, in the galactic center, which drives a flow of stars into nearly radial orbits to replace those it has destroyed. We consider two limits for the stellar response to tidal heating: surface heating with radiative cooling ("hot squeezars") and bulk heating with adiabatic expansion ("cold squeezars"), and calculate the evolution of the squeezar orbit, size, luminosity and effective temperature. The squeezar formation rate is only ~0.05 that of tidal disruption flares, but squeezar lifetimes are many orders of magnitude longer, and so future observations of squeezars in nearby galaxies can probe the tidal process that feeds MBHs and the effe...

  15. General relativistic tidal work for Papapetrou, Weinberg and Goldberg pseudotensors

    E-Print Network [OSTI]

    So, Lau Loi

    2015-01-01

    In 1998 Thorne claimed that all pseudotensors give the same tidal work as the Newtonian theory. In 1999, Purdue used the Landau-Lifshitz pseudotensor to calculate the tidal heating and the result matched with the Newtonian gravity. Soon after in 2001, Favata employed the same method to examine the Einstein, Bergmann-Thomson and M{\\o}ller pseudotensors, all of them give the same result as Purdue did. Inspired by the work of Purdue and Favata, for the completeness, here we manipulate the tidal work for Papapetrou, Weinberg and Goldberg pseudotensors. We obtained the same tidal work as Purdue achieved. In addition, we emphasize that a suitable gravitational energy-momentum pseudotensor requires fulfill the inside matter condition and all of the classical pseudotensors pass this test except M$\\o$ller. Moreover, we constructed a general pseudotesnor which is modified by 13 linear artificial higher order terms combination with Einstein pseudotensor. We find that the result agrees with Thorne's prediction, i.e., rel...

  16. Squeezars: Tidally powered stars orbiting a massive black hole

    E-Print Network [OSTI]

    Tal Alexander; Mark Morris

    2003-05-05

    We propose that there exists a class of transient sources, "squeezars", which are stars caught in highly eccentric orbits around a massive (mpowered by tidal interactions with the MBH. Their existence follows from the presence of a mass sink, the MBH, in the galactic center, which drives a flow of stars into nearly radial orbits to replace those it has destroyed. We consider two limits for the stellar response to tidal heating: surface heating with radiative cooling ("hot squeezars") and bulk heating with adiabatic expansion ("cold squeezars"), and calculate the evolution of the squeezar orbit, size, luminosity and effective temperature. The squeezar formation rate is only ~0.05 that of tidal disruption flares, but squeezar lifetimes are many orders of magnitude longer, and so future observations of squeezars in nearby galaxies can probe the tidal process that feeds MBHs and the effects of extreme tides on stars. The mean number of squeezars orbiting the Galactic MBH is estimated at 0.1-1.

  17. Pasture and Soil Management Following Tidal Saltwater Intrusion 

    E-Print Network [OSTI]

    Provin, Tony; Redmon, Larry; McFarland, Mark L.; Feagley, Sam E.

    2009-05-26

    When land is flooded by saltwater, as after a hurricane tidal surge, it can long-term effects on soil productivity and fertility. This publication explains how to reclaim flooded pasture land. Having soil tested for salinity is an important step....

  18. Examining the Impacts of Tidal Energy Capture from an Ecosystem

    E-Print Network [OSTI]

    Leslie, Heather

    ; however, the contribution of alternative fuel sources to overall energy is still small. In the United are under development in the Northeast, includ- ing Roosevelt Island in New York City's East RiverP A P E R Examining the Impacts of Tidal Energy Capture from an Ecosystem Services Perspective A U

  19. Tidal Conversion by Supercritical Topography NEIL J. BALMFORTH

    E-Print Network [OSTI]

    Balmforth, Neil

    Tidal Conversion by Supercritical Topography NEIL J. BALMFORTH University of British Columbia topography on the ocean floor. The ocean is treated as infinitely deep, and the topography consists. The calculations extend the previous results of Balmforth et al. for subcritical topography (wherein waves

  20. First-post-Newtonian quadrupole tidal interactions in binary systems

    E-Print Network [OSTI]

    Justin Vines; Éanna É. Flanagan

    2014-10-09

    We consider tidal coupling in a binary stellar system to first-post-Newtonian order. We derive the orbital equations of motion for bodies with spins and mass quadrupole moments and show that they conserve the total linear momentum of the binary. We note that spin-orbit coupling must be included in a 1PN treatment of tidal interactions in order to maintain consistency (except in the special case of adiabatically induced quadrupoles); inclusion of 1PN quadrupolar tidal effects while omitting spin effects would lead to a failure of momentum conservation for generic evolution of the quadrupoles. We use momentum conservation to specialize our analysis to the system's center-of-mass-energy frame; we find the binary's relative equation of motion in this frame and also present a generalized Lagrangian from which it can be derived. We then specialize to the case in which the quadrupole moment is adiabatically induced by the tidal field (in which case it is consistent to ignore spin effects). We show how the adiabatic dynamics for the quadrupole can be incorporated into our action principle and present the simplified orbital equations of motion and conserved energy for the adiabatic case. These results are relevant to gravitational wave signals from inspiralling binary neutron stars.

  1. Methane efflux from boreal wetlands: Theory and testing of the ecosystem model Ecosys with chamber and tower flux measurements

    E-Print Network [OSTI]

    Roulet, Nigel T.

    Methane efflux from boreal wetlands: Theory and testing of the ecosystem model Ecosys with chamber and Structure: Biosphere/atmosphere interactions; 1890 Hydrology: Wetlands; KEYWORDS: Ecosys, methane emissions, wetlands, modeling Citation: Grant, R. F., and N. T. Roulet, Methane efflux from boreal wetlands: Theory

  2. Energy Localization Invariance of Tidal Work in General Relativity

    E-Print Network [OSTI]

    Marc Favata

    2000-08-24

    It is well known that, when an external general relativistic (electric-type) tidal field E(t) interacts with the evolving quadrupole moment I(t) of an isolated body, the tidal field does work on the body (``tidal work'') -- i.e., it transfers energy to the body -- at a rate given by the same formula as in Newtonian theory: dW/dt = -1/2 E dI/dt. Thorne has posed the following question: In view of the fact that the gravitational interaction energy between the tidal field and the body is ambiguous by an amount of order E(t)I(t), is the tidal work also ambiguous by this amount, and therefore is the formula dW/dt = -1/2 E dI/dt only valid unambiguously when integrated over timescales long compared to that for I(t) to change substantially? This paper completes a demonstration that the answer is no; dW/dt is not ambiguous in this way. More specifically, this paper shows that dW/dt is unambiguously given by -1/2 E dI/dt independently of one's choice of how to localize gravitational energy in general relativity. This is proved by explicitly computing dW/dt using various gravitational stress-energy pseudotensors (Einstein, Landau-Lifshitz, Moller) as well as Bergmann's conserved quantities which generalize many of the pseudotensors to include an arbitrary function of position. A discussion is also given of the problem of formulating conservation laws in general relativity and the role played by the various pseudotensors.

  3. AN ECOLOGICAL STUDY OF GEORGIA COASTAL FISHES MICHAEL D. DAHLBERG'

    E-Print Network [OSTI]

    and middle reaches - 61, oligohaline creek - 40, fresh water - 39, tidal canal - 22, low- salinity tidal pool - 22, high-salinity tidal pool - 37. Estuaries are highly productive and support im- Portant sport for strip mining for titanium and phosphate. A nuclear power plant is under construction on the lower

  4. Pipeline corridors through wetlands - summary of seventeen plant-community studies at ten wetland crossings. Topical report, February 1990--August 1994

    SciTech Connect (OSTI)

    Van Dyke, G.D. |; Shem, L.M.; Wilkey, P.L.; Zimmerman, R.E.; Alsum, S.K.

    1994-12-01

    As part of the Gas Research Institute Wetland Corridors Program, Argonne National Laboratory conducted field studies on 10 wetland crossings located in six states to document impacts of natural gas pipeline rights-of-way (ROWS) on 15 wetland plant communities. This study is unique in the number, range, ages, and variety of wetland crossings surveyed and compared. Vegetation data and recorded observations were analyzed to reveal patterns associated with age, installation technology, maintenance practices, and wetland type. This report summarizes the findings of this study. Results revealed that ROWs of pipelines installed according to recent wetland regulations rapidly revegetated with dense and diverse plant communities. The ROW plant communities were similar to those in the adjacent natural areas in species richness, wetland indicator values, and percentages of native species. The ROW plant communities developed from naturally available propagules without fertilization, liming, or artificial seeding. ROWs contributed to increased habitat and plant species diversity in the wetland. There was little evidence that they degrade the wetland by providing avenues for the spread of invasive and normative plant species. Most impacts are temporal in nature, decreasing rapidly during the first several years and more slowly thereafter to the extent permitted by maintenance and other ROW activities.

  5. TRANSPORT PATHWAYS OF THE MAINE COASTAL CURRENT

    E-Print Network [OSTI]

    TRANSPORT PATHWAYS OF THE MAINE COASTAL CURRENT Monica J. Holboke and Daniel R. Lynch September 1996 Abstract The Maine Coastal Current(MCC) is initiated off the eastern coast of Maine and circuits the Gulf of Maine in a counterclockwise direction transporting various nu­ trients, biological species

  6. Changes in the Vegetation Cover in a Constructed Wetland at Argonne National Laboratory, Illinois

    SciTech Connect (OSTI)

    Bergman, C.L.; LaGory, K.

    2004-01-01

    Wetlands are valuable resources that are disappearing at an alarming rate. Land development has resulted in the destruction of wetlands for approximately 200 years. To combat this destruction, the federal government passed legislation that requires no net loss of wetlands. The United States Army Corps of Engineers (USACE) is responsible for regulating wetland disturbances. In 1991, the USACE determined that the construction of the Advanced Photon Source at Argonne National Laboratory would damage three wetlands that had a total area of one acre. Argonne was required to create a wetland of equal acreage to replace the damaged wetlands. For the first five years after this wetland was created (1992-1996), the frequency of plant species, relative cover, and water depth was closely monitored. The wetland was not monitored again until 2002. In 2003, the vegetation cover data were again collected with a similar methodology to previous years. The plant species were sampled using quadrats at randomly selected locations along transects throughout the wetland. The fifty sampling locations were monitored once in June and percent cover of each of the plant species was determined for each plot. Furthermore, the extent of standing water in the wetland was measured. In 2003, 21 species of plants were found and identified. Eleven species dominated the wetland, among which were reed canary grass (Phalaris arundinacea), crown vetch (Coronilla varia), and Canada thistle (Cirsium arvense). These species are all non-native, invasive species. In the previous year, 30 species were found in the same wetland. The common species varied from the 2002 study but still had these non-native species in common. Reed canary grass and Canada thistle both increased by more than 100% from 2002. Unfortunately, the non-native species may be contributing to the loss of biodiversity in the wetland. In the future, control measures should be taken to ensure the establishment of more desired native species.

  7. Exam Review WFS 340: Wetlands Ecology and Management

    E-Print Network [OSTI]

    Gray, Matthew

    plant classifications, which are related to flood tolerance. 4) Know which USACE plant classifications plant fibers. 7) Know percent composition of organic C required to be classified as an organic soil with respect to growing season flooding duration. Also, know which zones qualify as "wetland hydrology." 13

  8. Main Ecosystem Characteristics and Distribution of Wetlands in Boreal and

    E-Print Network [OSTI]

    9 Main Ecosystem Characteristics and Distribution of Wetlands in Boreal and Alpine Landscapes influenced while the rest are considered uninfluenced by human impact. Impacts are mainly from machines used or successional shifts to other vegetation types are more evident in such habitats. The main threats

  9. Evidence of Surface Connectivity for Texas Gulf Coast Depressional Wetlands

    E-Print Network [OSTI]

    and a regulatory perspective, to understand the surface water pathways that connect such wetlands to each other communities surrounded by terrestrial plant communities or undrained hydric soils surrounded by hydric soils hydrologically isolated as well; however, many are in fact connected, via subsurface pathways, with nearby water

  10. Climate Change Threatens Coexistence within Communities of Mediterranean Forested Wetlands

    E-Print Network [OSTI]

    Paparella, Francesco

    Climate Change Threatens Coexistence within Communities of Mediterranean Forested Wetlands Arianna on Agriculture, Forest, and Natural Ecosystems, Euromediterranean Center for Climate Change, Viterbo, Italy, 3 The Mediterranean region is one of the hot spots of climate change. This study aims at understanding what

  11. On-Site Wastewater Treatment Systems: Constructed Wetland Media 

    E-Print Network [OSTI]

    Lesikar, Bruce J.; Weaver, Richard; Richter, Amanda; O'Neill, Courtney

    2005-02-19

    or installer may know where to buy them. If not, the Texas Commission for Environmental Quality maintains a list of tire-chip processors on its Web site at: http://www.tceq.state.tx.us/assets/pub lic/comm_exec/pubs/sfr/069_03.pdf Configuration Wetland beds can...

  12. Creating Wildlife Habitat with Native Florida Freshwater Wetland Plants1

    E-Print Network [OSTI]

    Hill, Jeffrey E.

    and absorb carbon dioxide, a greenhouse gas associated with global warming. Wetland plants improve water quality by remov- ing fertilizers such as nitrogen and phosphorus and, by doing so, help control algal in Florida and spread extensively into natural areas. Non-native plants that spread into natural areas

  13. SEWAGE LAGOON DESIGN USING WETLANDS AND OTHER UPGRADING TECHNOLOGIES

    E-Print Network [OSTI]

    that a total ammonia concentration of 5 mg/L-N be used as a design criteria. In additionto presenting design#12;L L llF L L L SEWAGE LAGOON DESIGN USING WETLANDS AND OTHER UPGRADING TECHNOLOGIES TO ACHIEVE effluents are typically non-toxic. Using an arbitrary factor of safety of two, it is recommended

  14. Tidal dissipation in a homogeneous spherical body. I. Methods

    SciTech Connect (OSTI)

    Efroimsky, Michael; Makarov, Valeri V. E-mail: vvm@usno.navy.mil

    2014-11-01

    A formula for the tidal dissipation rate in a spherical body is derived from first principles to correct some mathematical inaccuracies found in the literature. The development is combined with the Darwin-Kaula formalism for tides. Our intermediate results are compared with those by Zschau and Platzman. When restricted to the special case of an incompressible spherical planet spinning synchronously without libration, our final formula can be compared with the commonly used expression from Peale and Cassen. However, the two turn out to differ, as in our expression the contributions from all Fourier modes are positive-definite, which is not the case with the formula from Peale and Cassen. Examples of the application of our expression for the tidal damping rate are provided in the work by Makarov and Efroimsky (Paper II) published back to back with the current paper.

  15. 86 Water Resources and the Urban Environment Review of Analytical Studies of Tidal Groundwater Flow in Coastal

    E-Print Network [OSTI]

    Jiao, Jiu Jimmy

    . For example, Carr (1969) investigated the tide-related salt-water intrusion in Prince Edward Island; Lanyon et

  16. EA-1949: Admiralty Inlet Pilot Tidal Project, Puget Sound, WA

    Broader source: Energy.gov [DOE]

    This EA analyzes the potential environmental effects of a proposal by the Public Utility District No. 1 of Snohomish County, Washington to construct and operate the Admiralty Inlet Tidal Project. The proposed 680-kilowatt project would be located on the east side of Admiralty Inlet in Puget Sound, Washington, about 1 kilometer west of Whidbey Island, entirely within Island County, Washington. The Federal Energy Regulatory Commission (FERC) is the lead agency. The DOE NEPA process for this project has been canceled.

  17. On the circulation and tidal flushing of Mobile Bay, Alabama 

    E-Print Network [OSTI]

    Austin, George Belden

    1953-01-01

    of Symbols, Tables ~ . . . I, INTRODUCTION Historical B. Classification of Estuaries C. Ob]ectives II. GENERAL DISCUSSION OF NOBILE BAY A. Geomorphological B. Geological C. Biological iii ~ ~ vi ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ o sic.... Collection of Data 27 2B V, ANALYSIS OF THE DATA A. Methods B. Distribution of Temperature, Salinity, and Fresh Water Page 30 30 C. Circulation D. Mass Transport . E. Tidal Flushing of Mobile Bay . VI ~ SUMMAHY AND CONCLUSIONS VII, BIBLIOGRAPHY...

  18. Severn Tidal Power Group STpg | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page| Open Energy Information Serbia-Enhancing Capacity for Low Emission DevelopmentLakes, North Carolina:Severn Tidal

  19. Forced libration of tidally synchronized planets and moons

    E-Print Network [OSTI]

    Makarov, Valeri V; Dorland, Bryan

    2015-01-01

    Tidal dissipation of kinetic energy, when it is strong enough, tends to synchronize the rotation of planets and moons with the mean orbital motion, or drive it into long-term stable spin-orbit resonances. As the orbital motion undergoes periodic acceleration due to a finite orbital eccentricity, the spin rate oscillates around the equilibrium mean value too, giving rise to the forced, or eccentricity-driven, librations. Both the shape and amplitude of forced librations of synchronous viscoelastic planets and moons are defined by a combination of two different types of perturbative torque, the tidal torque and the triaxial torque. Consequently, forced librations can be tidally dominated (e.g., Io and possibly Titan) or deformation-dominated (e.g., the Moon) depending on a set of orbital, rheological, and other physical parameters. With small eccentricities, for the former kind, the largest term in the libration angle can be minus cosine of the mean anomaly, whereas for the latter kind, it is minus sine of the ...

  20. The Arches Cluster: Extended Structure and Tidal Radius

    E-Print Network [OSTI]

    Hosek, Matthew W; Anderson, Jay; Ghez, Andrea M; Morris, Mark R; Clarkson, William I

    2015-01-01

    At a projected distance of ~26 pc from Sgr A*, the Arches cluster provides insight to star formation in the extreme Galactic Center (GC) environment. Despite its importance, many key properties such as the cluster's internal structure and orbital history are not well known. We present an astrometric and photometric study of the outer region of the Arches cluster (R > 6.25") using HST WFC3IR. Using proper motions we calculate membership probabilities for stars down to F153M = 20 mag (~2.5 M_sun) over a 120" x 120" field of view, an area 144 times larger than previous astrometric studies of the cluster. We construct the radial profile of the Arches to a radius of 75" (~3 pc at 8 kpc), which can be well described by a single power law. From this profile we place a 3-sigma lower limit of 2.8 pc on the observed tidal radius, which is larger than the predicted tidal radius (1 - 2.5 pc). Evidence of mass segregation is observed throughout the cluster and no tidal tail structures are apparent along the orbital path. ...

  1. A coastal hazards data base for the U.S. West Coast

    SciTech Connect (OSTI)

    Gornitz, V.M. |; Beaty, T.W.; Daniels, R.C.

    1997-12-01

    This document describes the contents of a digital data base that may be used to identify coastlines along the US West Coast that are at risk to sea-level rise. This data base integrates point, line, and polygon data for the US West Coast into 0.25{degree} latitude by 0.25{degree} longitude grid cells and into 1:2,000,000 digitized line segments that can be used by raster or vector geographic information systems (GIS) as well as by non-GIS data bases. Each coastal grid cell and line segment contains data variables from the following seven data sets: elevation, geology, geomorphology, sea-level trends, shoreline displacement (erosion/accretion), tidal ranges, and wave heights. One variable from each data set was classified according to its susceptibility to sea-level rise and/or erosion to form 7 relative risk variables. These risk variables range in value from 1 to 5 and may be used to calculate a Coastal Vulnerability Index (CVI). Algorithms used to calculate several CVIs are listed within this text.

  2. On the tidal radius of satellites on prograde and retrograde orbits

    E-Print Network [OSTI]

    Gajda, Grzegorz

    2015-01-01

    A tidal radius is a distance from a satellite orbiting in a host potential beyond which its material is stripped by the tidal force. We derive a revised expression for the tidal radius of a rotating satellite which properly takes into account the possibility of prograde and retrograde orbits of stars. Besides the eccentricity of the satellite orbit, the tidal radius depends also on the ratio of the satellite internal angular velocity to the orbital angular velocity. We compare our formula to the results of two $N$-body simulations of dwarf galaxies orbiting a Milky Way-like host on a prograde and retrograde orbit. The tidal radius for the retrograde case is larger than for the prograde. We introduce a kinematic radius separating stars still orbiting the dwarf galaxy from those already stripped and following the potential of the host galaxy. We find that the tidal radius matches very well the kinematic radius.

  3. Plant species as a significant factor in wastewater treatment in constructed wetlands 

    E-Print Network [OSTI]

    Varvel, Tracey W

    2013-02-22

    point of many current studies. They are designed to mimic natural wetlands, leaving the majority of wastewater cleanup to wetlands plant life. The use of plant life to remove or reduce environmental contaminants is known as phytoremediation (Anderson..., 1996). The environmental contaminants present in wastewater include nitrogen (N), phosphorus (P), Biochemical Oxygen Demand (BOD) levels, suspended solids, and pathogens. These constructed wetlands have many advantages such as; energy efficiency...

  4. Analysis of tidal current observations over the northeastern shelf of the Gulf of Mexico 

    E-Print Network [OSTI]

    Durham, Donald L

    1967-01-01

    LIST OF FIGURES Chapter TABLE OF CONTENTS Page vi vii IV INTRODUCTION A. Statement of Problem B. Literature Review 1. Tidal Current Theory 2. Tidal Current Observations INSTRUMENTATION AND DATA COLLECTION A. Selection and Modification... of Equipment B. September 1965 Survey DATA ANALYSIS AND RESULTS A. The Surface Tide 1. General 2. Gulf of Mexico B. Current Components C. Spectral Analysis D. Harmonic Analysis E. Tidal Ellipse F, Temperature CONCLUSIONS 1 1 2 2 11 15 15 21...

  5. Mechanisms generating modification of benthos following tidal flat invasion by a Spartina hybrid

    E-Print Network [OSTI]

    Neira, C; Grosholz, E D; Levin, L A; Blake, R

    2006-01-01

    1997. Kinetics of tidal resuspension of microbiota: testingare susceptible to resuspension following bio- turbation (in barnacle recruitment and resuspension of adult benthic

  6. MECHANISMS GENERATING MODIFICATION OF BENTHOS FOLLOWING TIDAL FLAT INVASION BY A SPARTINA HYBRID

    E-Print Network [OSTI]

    Neira, Carlos; Grosholz, Edwin D; Levin, Lisa A; Blake, Rachael

    2006-01-01

    1997. Kinetics of tidal resuspension of microbiota: testingare susceptible to resuspension following bio- turbation (in barnacle recruitment and resuspension of adult benthic

  7. Assessment of Strike of Adult Killer Whales by an OpenHydro Tidal Turbine Blade

    SciTech Connect (OSTI)

    Carlson, Thomas J.; Elster, Jennifer L.; Jones, Mark E.; Watson, Bruce E.; Copping, Andrea E.; Watkins, Michael L.; Jepsen, Richard A.; Metzinger, Kurt

    2012-02-01

    Report to DOE on an analysis to determine the effects of a potential impact to an endangered whale from tidal turbines proposed for deployment in Puget Sound.

  8. Tapping into Wave and Tidal Ocean Power: 15% Water Power by 2030...

    Broader source: Energy.gov (indexed) [DOE]

    Office What are the key documents? Mapping and Assessment of the United States Ocean Wave Energy Resource pdf here Assessment of Energy Production Potential from Tidal Streams...

  9. Terrestrial and Aquatic Macroinvertebrate Assemblages as a Function of Wetland Type across a Mountain Landscape

    E-Print Network [OSTI]

    Holmquist, Jeffrey G; Jones, Jennifer R; Schmidt-Gengenbach, Jutta; Pierotti, Lyra F; Love, Jason P

    2011-01-01

    the spatial complexity of mountain habitats. Global Ecologyof Wetland Type across a Mountain Landscape Jeffrey G.Jason P. Love* *White Mountain Research Station, University

  10. Wetland Permit Application Fees 2015 | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page| Open Energy Information Serbia-EnhancingEtGeorgia: EnergyMaryland: Energy ResourcesVermont:Westway,NewWetland Permit

  11. Carbon cycling in boreal wetlands: A comparison of three approaches

    SciTech Connect (OSTI)

    Trumbore, Susan E. [Department of Earth System Science, University of California, Irvine, California (United States)] [Department of Earth System Science, University of California, Irvine, California (United States); Bubier, Jill L. [Complex Systems Research Center, University of New Hampshire, Durham, New Hampshire (United States)] [Complex Systems Research Center, University of New Hampshire, Durham, New Hampshire (United States); Harden, Jennifer W. [U.S. Geological Survey, Menlo Park, California (United States)] [U.S. Geological Survey, Menlo Park, California (United States); Crill, Patrick M. [Complex Systems Research Center, University of New Hampshire, Durham, New Hampshire (United States)] [Complex Systems Research Center, University of New Hampshire, Durham, New Hampshire (United States)

    1999-11-27

    Three independent methods were used to measure net ecosystem production (NEP) in four wetlands near Thompson, Manitoba, Canada. The first method calculated NEP by subtracting heterotrophic respiration from net primary productivity, using both measurements and estimates derived from the literature. The second method used radiocarbon data from cores to derive long-term NEP averaged over the past several decades. The third method used direct measurement of NEP combined with a model to fill in for days with no data. The three methods, with their independently derived uncertainties, all show the same magnitude and pattern of NEP variation across four different wetland types. However, direct measurement yielded distinctly lower estimates of NEP in the most productive sites. Highest NEP (31-180 gC m-2 yr-1) was observed in the two wetlands with the highest proportion of sedge vegetation. A bog collapse scar and a nutrient-rich fen had NEP values not significantly different from zero. The maximum NEP at sites with intermediate nutrient status is due to slower overall decomposition and is likely associated with greater allocation of production below ground by sedges. The three methods for estimating NEP differ in the effort required, the sources of error, and in the timescale over which they apply. Used in combination, they allow estimation of parameters such as below-ground production and the contribution of heterotrophic decomposition to total soil respiration. Using the radiocarbon method, we also derived estimates of the rate of N accumulation in the four wetland types. (c) 2000 American Geophysical Union.

  12. Jets from Tidal Disruptions of Stars by Black Holes

    E-Print Network [OSTI]

    Julian H. Krolik; Tsvi Piran

    2012-02-07

    Tidal disruption of main sequence stars by black holes has generally been thought to lead to a signal dominated by UV emission. If, however, the black hole spins rapidly and the poloidal magnetic field intensity on the black hole horizon is comparable to the inner accretion disk pressure, a powerful jet may form whose luminosity can easily exceed the thermal UV luminosity. When the jet beam points at Earth, its non-thermal luminosity can dominate the emitted spectrum. The thermal and non-thermal components decay differently with time. In particular, the thermal emission should remain roughly constant for a significant time after the period of maximum accretion, beginning to diminish only after a delay, whereas after the peak accretion rate, the non-thermal jet emission decays, but then reaches a plateau. Both transitions are tied to a characteristic timescale $t_{\\rm Edd}$ at which the accretion rate falls below Eddington. Making use of this timescale in a new parameter-inference formalism for tidal disruption events with significant emission from a jet, we analyze the recent flare source Swift J2058. It is consistent with an event in which a main sequence solar-type staris disrupted by a black hole of mass $\\sim 4 \\times 10^7 M_{\\odot}$. The beginning of the flat phase in the non-thermal emission from this source can possibly be seen in the late-time lightcurve. Optical photometry over the first $\\simeq 40$ d of this flare is also consistent with this picture, but is only weakly constraining because the bolometric correction is very uncertain. We suggest that future searches for main sequence tidal disruptions use methods sensitive to jet radiation as well as to thermal UV radiation.

  13. MHK Projects/Rockaway Tidal Energy Plant | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View NewTexas:Montezuma,Information MHKMHK5 < MHKKembla < MHK Projects JumpRockaway Tidal

  14. The Wash Tidal Barrier Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc JumpHeterInformation Policy andInstitute JumpWash Tidal Barrier

  15. List of Tidal Energy Incentives | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource History ViewInformationWindsCompressedList of RefuelingRoomList ofSolarTidal

  16. MHK Projects/Avalon Tidal | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource HistoryScenarios Towards 2050 Jump to:Projects/Alaska 31 <Avalon Tidal < MHK

  17. MHK Projects/BW2 Tidal | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource HistoryScenarios Towards 2050 Jump to:Projects/Alaska 31 <Avalon Tidal <BW2

  18. MHK Projects/Cape May Tidal Energy | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource HistoryScenarios Towards 2050 Jump to:Projects/Alaska 31BondurantCETO3May Tidal

  19. MHK Projects/Killisnoo Tidal Energy | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource HistoryScenarios Towards 2050 JumpCoos Bay OPTHalf MoonKillisnoo Tidal Energy <

  20. MHK Projects/Kingsbridge Tidal Energy Project | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource HistoryScenarios Towards 2050 JumpCoos Bay OPTHalf MoonKillisnoo Tidal Energy

  1. MHK Projects/Margate Tidal | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource HistoryScenarios Towards 2050 JumpCoos Bay OPTHalf| Open EnergyMaineMargate Tidal

  2. MHK Projects/Maurice River Tidal | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource HistoryScenarios Towards 2050 JumpCoos Bay OPTHalf| OpenMaurice River Tidal <

  3. MHK Projects/Salem Tidal Energy | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource HistoryScenarios Towards 2050 JumpCoos BayOysterReliance LightSalem Tidal Energy

  4. MHK Technologies/Sabella subsea tidal turbine | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource HistoryScenarios Towards 2050Enermar <OMIS D E < MHKSPERBOY <subsea tidal

  5. Hydropower, Wave and Tidal Technologies - Energy Innovation Portal

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenry Bellamy, Ph.D.FoodHydropower, Wave and Tidal » Technology

  6. Sandia Energy - Tidal & Current Modeling Development and Validation

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II)GeothermalFuel Magnetization andStochasticunique wind(CREW)Tidal &

  7. RED CLUMP STARS IN THE SAGITTARIUS TIDAL STREAMS

    SciTech Connect (OSTI)

    Carrell, Kenneth; Chen Yuqin; Wilhelm, Ronald

    2012-07-15

    We have probed a section (l {approx} 150, b {approx} -60) of the trailing tidal arm of the Sagittarius dwarf spheroidal galaxy by identifying a sample of Red Clump (RC) stream stars. RC stars are not generally found in the halo field, but are found in significant numbers in both the Sagittarius galaxy and its tidal streams, making them excellent probes of stream characteristics. Our target sample was selected using photometric data from the Sloan Digital Sky Survey, Data Release 6, which was constrained in color to match the Sagittarius RC stars. Spectroscopic observations of the target stars were conducted at Kitt Peak National Observatory using the WIYN telescope. The resulting spectroscopic sample is magnitude limited and contains both main-sequence disk stars and evolved RC stars. We have developed a method to systematically separate these two stellar classes using kinematic information and a Bayesian approach for surface gravity determination. The resulting RC sample allows us to determine an absolute stellar density of {rho} = 2.7 {+-} 0.5 RC stars kpc{sup -3} at this location in the stream. Future measurements of stellar densities for a variety of populations and at various locations along the streams will lead to a much improved understanding of the original nature of the Sagittarius galaxy and the physical processes controlling its disruption and subsequent stream generation.

  8. Relativistic effects on tidal disruption kicks of solitary stars

    E-Print Network [OSTI]

    Gafton, Emanuel; Guillochon, James; Korobkin, Oleg; Rosswog, Stephan

    2015-01-01

    Solitary stars that wander too close to their galactic centres can become tidally disrupted, if the tidal forces due to the supermassive black hole (SMBH) residing there overcome the self-gravity of the star. If the star is only partially disrupted, so that a fraction survives as a self-bound object, this remaining core will experience a net gain in specific orbital energy, which translates into a velocity "kick" of up to $\\sim 10^3$ km/s. In this paper, we present the result of smoothed particle hydrodynamics (SPH) simulations of such partial disruptions, and analyse the velocity kick imparted on the surviving core. We compare $\\gamma$ = 5/3 and $\\gamma$ = 4/3 polytropes disrupted in both a Newtonian potential, and a generalized potential that reproduces most relativistic effects around a Schwarzschild black hole either exactly or to excellent precision. For the Newtonian case, we confirm the results of previous studies that the kick velocity of the surviving core is virtually independent of the ratio of the...

  9. The Magellanic Bridge: The Nearest Purely Tidal Stellar Population

    E-Print Network [OSTI]

    Jason Harris

    2006-12-04

    We report on observations of the stellar populations in twelve fields spanning the region between the Magellanic Clouds, made with the Mosaic-II camera on the 4-meter telescope at the Cerro-Tololo Inter-American Observatory. The two main goals of the observations are to characterize the young stellar population (which presumably formed in situ in the Bridge and therefore represents the nearest stellar population formed from tidal debris), and to search for an older stellar component (which would have been stripped from either Cloud as stars, by the same tidal forces which formed the gaseous Bridge). We determine the star-formation history of the young inter-Cloud population, which provides a constraint on the timing of the gravitational interaction which formed the Bridge. We do not detect an older stellar population belonging to the Bridge in any of our fields, implying that the material that was stripped from the Clouds to form the Magellanic Bridge was very nearly a pure gas.

  10. Tidal Dwarf Galaxies: Disc Formation at z=0

    E-Print Network [OSTI]

    Lelli, Federico; Brinks, Elias; McGaugh, Stacy S

    2015-01-01

    Collisional debris around interacting and post-interacting galaxies often display condensations of gas and young stars that can potentially form gravitationally bound objects: Tidal Dwarf Galaxies (TDGs). We summarise recent results on TDGs, which are originally published in Lelli et al. (2015, A&A). We study a sample of six TDGs around three different interacting systems, using high-resolution HI observations from the Very Large Array. We find that the HI emission associated to TDGs can be described by rotating disc models. These discs, however, would have undergone less than one orbit since the time of the TDG formation, raising the question of whether they are in dynamical equilibrium. Assuming that TDGs are in dynamical equilibrium, we find that the ratio of dynamical mass to baryonic mass is consistent with one, implying that TDGs are devoid of dark matter. This is in line with the results of numerical simulations where tidal forces effectively segregate dark matter in the halo from baryonic matter i...

  11. HAWAIIAN OCEAN MIXING EXPERIMENT (HOME): FARFIELD PROGRAM HAWAIIAN TIDAL ENERGY BUDGET

    E-Print Network [OSTI]

    Dushaw, Brian

    HAWAIIAN OCEAN MIXING EXPERIMENT (HOME): FARFIELD PROGRAM HAWAIIAN TIDAL ENERGY BUDGET Principal). This tidal energy budget will determine limits on the energy dissipated in the nearfield of the Hawaiian and ocean acoustic tomography have brought a new dimension to the subject. We propose to measure the energy

  12. JULY 2005 1 An estimate of tidal energy lost to turbulence at the Hawaiian Ridge

    E-Print Network [OSTI]

    Klymak, Jody M.

    JULY 2005 1 An estimate of tidal energy lost to turbulence at the Hawaiian Ridge JODY M. KLYMAK1 of the ridge, giving an estimate of 3±1.5 GW of tidal energy lost to turbulence dissipation within 60 km relation- ship between the energy in the semi-diurnal internal tide (E) and the depth

  13. ORNL/TM-2012/301 Experimental Test Plan DOE Tidal

    E-Print Network [OSTI]

    Siefert, Chris

    ORNL/TM-2012/301 Experimental Test Plan ­ DOE Tidal And River Reference Turbines August 2012 Test Plan ­ DOE Tidal and River Reference Turbines Vincent S. Neary1 Craig Hill2 Leonardo P. Chamorro 2 16, 2012 Prepared for: Wind and Water Power Technologies Program Office of Energy Efficiency

  14. time scale observed in some close binary systems (19), and tidal dissipation (20)

    E-Print Network [OSTI]

    Stanley, H. Eugene

    time scale observed in some close binary systems (19), and tidal dissipation (20) may also cause). At this stage, the core of star A undergoes collapse, and the residual nuclear fuel is ignited to power aware that both tidal and general relativistic ef- fects will be important in this system

  15. Post Doctoral (OR Research Engineer) fellowship Distributed Control of a Tidal Farm

    E-Print Network [OSTI]

    Condat, Laurent

    Post Doctoral (OR Research Engineer) fellowship Distributed Control of a Tidal Farm Context on con- trol systems and power systems) and ALSTOM-ocean (world- wide leader in turbines construction and operating a tidal farm of 30-200 MW. Successful applicants will work at GIPSA-lab (Grenoble) (http

  16. Numerical and Analytical Estimates of M2 Tidal Conversion at Steep Oceanic Ridges EMANUELE DI LORENZO

    E-Print Network [OSTI]

    Young, William R.

    of mechanical energy required to mix the global ocean (Garrett and St. Laurent 2002). Tidal forces perform aboutNumerical and Analytical Estimates of M2 Tidal Conversion at Steep Oceanic Ridges EMANUELE DI) ABSTRACT Numerical calculations of the rate at which energy is converted from the external to internal

  17. Can Earth's rotation and tidal despinning drive plate tectonics? Federica Riguzzi a,c,

    E-Print Network [OSTI]

    Can Earth's rotation and tidal despinning drive plate tectonics? Federica Riguzzi a,c, , Giuliano January 2009 Accepted 10 June 2009 Available online xxxx Keywords: Plate tectonics Earth's rotation Tidal despinning Earth's energy budget We re-evaluate the possibility that Earth's rotation contributes to plate

  18. Vibrio litoralis sp. nov., isolated from a Yellow Sea tidal flat in Korea

    E-Print Network [OSTI]

    Bae, Jin-Woo

    Vibrio litoralis sp. nov., isolated from a Yellow Sea tidal flat in Korea Young-Do Nam,1,2 Ho-negative, facultatively anaerobic bacterial strains, MANO22DT and MANO22P, were isolated from a tidal flat area of Dae and energy sources. A phylogenetic analysis based on 16S rRNA gene sequences revealed that the strains belong

  19. Expressions for Tidal Conversion at Seafloor Topography using Physical-Space Integrals

    E-Print Network [OSTI]

    Schörghofer, Norbert

    Expressions for Tidal Conversion at Seafloor Topography using Physical-Space Integrals Norbert and a potential source of the required mechanical energy is the generation and breaking of internal gravity waves (Egbert and Ray, 2000; Ledwell et al., 2000). Tidal dissipation has long been recognized as important

  20. Laboratory studies of eddy structures and exchange processes through tidal inlets 

    E-Print Network [OSTI]

    Nicolau del Roure, Francisco

    2009-06-02

    , Germany, which has the capability to generate a sinusoidal flow that simulates a series of tidal cycles. A set of idealized inlets were arranged in the tank, and by varying the tidal period and the maximum velocity, three different types of life...

  1. Cross-shore sediment transport and the equilibrium morphology of mudflats under tidal currents

    E-Print Network [OSTI]

    Hogg, Andrew

    Cross-shore sediment transport and the equilibrium morphology of mudflats under tidal currents D of suspended sediment transport under cross-shore tidal currents on an intertidal mudflat. We employ a Lagrangian formulation to obtain periodic solutions for the sediment transport over idealized bathymetries

  2. Cross-shore suspended sediment transport under tidal currents Andrew J. Hogg1

    E-Print Network [OSTI]

    Hogg, Andrew

    Cross-shore suspended sediment transport under tidal currents Andrew J. Hogg1 and David Pritchard2-mail: david@bpi.cam.ac.uk Abstract The transport of sediment over an intertidal mudflat by a cross-shore tidal-layer approximation. It is found that the sediment transport comprises advection with the mean flow, deposition

  3. Chapter 5 -Sediment, Nutrient, and Vegetation Trends Along the Tidal, Forested Pocomoke

    E-Print Network [OSTI]

    Chapter 5 - Sediment, Nutrient, and Vegetation Trends Along the Tidal, Forested Pocomoke River-tidal upstream sites. Floodplain sediments in the past W.H. Conner, T.W. Doyle, and K.W. Krauss (eds.), Ecology]). These sediments overlie hundreds of meters of Tertiary (2-65 mybp) greensands and clay- silt. The Tertiary

  4. Integration of Wave and Tidal Power into the Haida Gwaii Electrical Grid

    E-Print Network [OSTI]

    Victoria, University of

    Integration of Wave and Tidal Power into the Haida Gwaii Electrical Grid by Susan Margot Boronowski Committee Integration of Wave and Tidal Power into the Haida Gwaii Electrical Grid by Susan Margot only be practical at power penetration levels less than 20%. #12;iv Table of Contents Supervisory

  5. Characterizing hydraulic properties of filter material of a Vertical Flow1 Constructed Wetland2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Characterizing hydraulic properties of filter material of a Vertical Flow1 Constructed Wetland2 A Characterizing the hydraulic properties of filter material used in a vertical flow11 constructed wetland (VFCW of porous mineral material and13 organic matter that makes hydraulic characterization a difficult task. Here

  6. A synthesis of methane emissions from 71 northern, temperate, and subtropical wetlands

    E-Print Network [OSTI]

    A synthesis of methane emissions from 71 northern, temperate, and subtropical wetlands M E R R I of atmospheric methane. Here, we assess controls on methane flux using a database of approximately 19 000 latitude regions. Our analyses confirm general controls on wetland methane emissions from soil temperature

  7. POSSIBLE ROLE OF WETLANDS, PERMAFROST, AND METHANE HYDRATES IN THE METHANE

    E-Print Network [OSTI]

    Chappellaz, Jérôme

    POSSIBLE ROLE OF WETLANDS, PERMAFROST, AND METHANE HYDRATES IN THE METHANE CYCLE UNDER FUTURE the available scientific literature on how natural sources and the atmospheric fate of methane may be affected by future climate change. We discuss how processes governing methane wetland emissions, per- mafrost thawing

  8. Nitrogen cycling, plant biomass, and carbon dioxide evolution in a subsurface flow wetland 

    E-Print Network [OSTI]

    Lane, Jeffrey J

    2000-01-01

    ? volatilization likely was responsible for most of the nitrogen loss. The amount of CO? flux from the wetland was measured from the influent end to the effluent end. Carbon dioxide evolution decreased as water passed through the wetland. The average CO? flux level...

  9. APPLICATION OF 3S TECHNIQUES IN THE STUDY OF WETLAND ENVIRONMENT OF

    E-Print Network [OSTI]

    -731-85551337, Email: xbcyyhn@163.com Abstract: Wetland is a multifunctional ecosystem in the earth, wetlands possess route are introduced. The beach and water area information were gained.the dynamic changes of water were Lake. Key words: Remote sensing system,Geographic information system,global position system Monitor

  10. The Influence of Microtopography on Soil Nutrients in Created Mitigation Wetlands

    E-Print Network [OSTI]

    in Virginia, and examining the effects of disking during wetland creation. Replicate multiscale tangentially-extractable NH4­N and NO3­N, and Mehlich-3 extractable P, Ca, Mg, K, Al, Fe, and Mn. Means and variances of soil and Fe, lower Mn than cre- ated wetlands, and comparatively high variability in nutri- ent concentrations

  11. MINERALOGY AND GENESIS OF SMECTITES IN AN ALKALINE-SALINE ENVIRONMENT OF PANTANAL WETLAND, BRAZIL

    E-Print Network [OSTI]

    Ahmad, Sajjad

    MINERALOGY AND GENESIS OF SMECTITES IN AN ALKALINE-SALINE ENVIRONMENT OF PANTANAL WETLAND, BRAZIL, Universidade de Sa~o Paulo (USP), Av. Prof. Dr. Lineu Prestes, 338, 05508-900, Sa~o Paulo, Brazil 2 Soil-saline lake of Nhecola^ndia, a sub-region of the Pantanal wetland, Brazil, and then to identify the mechanisms

  12. Ecological outcomes and evaluation of success in passively restored southeastern depressional wetlands.

    SciTech Connect (OSTI)

    De Steven, Diane; Sharitz, Rebecca R.; Barton, Christopher, D.

    2010-11-01

    Abstract: Depressional wetlands may be restored passively by disrupting prior drainage to recover original hydrology and relying on natural revegetation. Restored hydrology selects for wetland vegetation; however, depression geomorphology constrains the achievable hydroperiod, and plant communities are influenced by hydroperiod and available species pools. Such constraints can complicate assessments of restoration success. Sixteen drained depressions in South Carolina, USA, were restored experimentally by forest clearing and ditch plugging for potential crediting to a mitigation bank. Depressions were assigned to alternate revegetation methods representing desired targets of herbaceous and wet-forest communities. After five years, restoration progress and revegetation methods were evaluated. Restored hydroperiods differed among wetlands, but all sites developed diverse vegetation of native wetland species. Vegetation traits were influenced by hydroperiod and the effects of early drought, rather than by revegetation method. For mitigation banking, individual wetlands were assessed for improvement from pre-restoration condition and similarity to assigned reference type. Most wetlands met goals to increase hydroperiod, herb-species dominance, and wetland-plant composition. Fewer wetlands achieved equivalence to reference types because some vegetation targets were incompatible with depression hydroperiods and improbable without intensive management. The results illustrated a paradox in judging success when vegetation goals may be unsuited to system constraints.

  13. Scaling laws to quantify tidal dissipation in star-planet systems

    E-Print Network [OSTI]

    Auclair-Desrotour, Pierre; Poncin-Lafitte, Christophe Le

    2015-01-01

    Planetary systems evolve over secular time scales. One of the key mechanisms that drive this evolution is tidal dissipation. Submitted to tides, stellar and planetary fluid layers do not behave like rocky ones. Indeed, they are the place of resonant gravito-inertial waves. Therefore, tidal dissipation in fluid bodies strongly depends on the excitation frequency while this dependence is smooth in solid ones. Thus, the impact of the internal structure of celestial bodies must be taken into account when studying tidal dynamics. The purpose of this work is to present a local model of tidal gravito-inertial waves allowing us to quantify analytically the internal dissipation due to viscous friction and thermal diffusion, and to study the properties of the resonant frequency spectrum of the dissipated energy. We derive from this model scaling laws characterizing tidal dissipation as a function of fluid parameters (rotation, stratification, diffusivities) and discuss them in the context of star-planet systems.

  14. Modeling Tidal Freshwater Marsh Sustainability in the Sacramento–San Joaquin Delta Under a Broad Suite of Potential Future Scenarios

    E-Print Network [OSTI]

    Swanson, Kathleen M.; Drexler, Judith Z.; Fuller, Christopher C.; Schoellhamer, David H.

    2015-01-01

    tidal freshwater marsh sites in the Delta Site name Coordinates Area (ha) Elevation above MSL (cm) Salinity regime Energy

  15. Modeling Tidal Freshwater Marsh Sustainability in the Sacramento–San Joaquin Delta Under a Broad Suite of Potential Future Scenarios

    E-Print Network [OSTI]

    Swanson, Kathleen M.; Drexler, Judith Z.; Fuller, Christopher C.; Schoellhamer, David H.

    2015-01-01

    Table 1 Location and basic characteristics of tidal freshwater marsh sites in the Delta Site name Coordinates

  16. Potential Oil Production from the Coastal Plain of the Arctic...

    U.S. Energy Information Administration (EIA) Indexed Site

    Potential Oil Production from the Coastal Plain of the Arctic National Wildlife Refuge: Updated Assessment 3. Summary The 1.5 million-acre coastal plain of the 19 million-acre...

  17. Mechanisms of metal release from contaminated coastal sediments

    E-Print Network [OSTI]

    Kalnejais, Linda H

    2005-01-01

    The fate of trace metals in contaminated coastal sediments is poorly understood, yet critical for effective coastal management. The aim of this thesis is to investigate and quantify the mechanisms leading to the release ...

  18. Calculation of Extreme Wave Loads on Coastal Highway Bridges 

    E-Print Network [OSTI]

    Meng, Bo

    2010-01-14

    Coastal bridges are exposed to severe wave, current and wind forces during a hurricane. Most coastal bridges are not designed to resist wave loads in such extreme situations, and there are no existing analytical methods to calculate wave loads...

  19. A survey of the wetlands and floodplains of the borrow area and wetland/shorebird complex for the remedial action at the chemical plant area of the Weldon Spring Site

    SciTech Connect (OSTI)

    Van Lonkhuyzen, R.; Yin, S.; Hlohowskyj, I.

    1995-02-01

    The US Department of Energy is conducting cleanup operations at the Weldon Spring site, St. Charles, Missouri, that will include development of a 77-ha (191-acre) soil borrow area. Eight wetlands, including riverine and palustrine emergent wetland types and totaling 0.9 ha (2.2 acres), will be eliminated during excavation of the borrow area. A 23-ha (57-acre) wetland/shorebird complex will be created at the Busch Conservation Area. The complex will include 2 ha (5 acres) of palustrine emergent wetland as mitigation for wetland losses in the borrow area.

  20. Internal wave and boundary current generation by tidal flow over topography Amadeus Dettner, Harry L. Swinney, and M. S. Paoletti

    E-Print Network [OSTI]

    to characterize the conversion of tidal energy to radiated internal wave power. Whether the hydrostatic ( , shape)/SIW, where Ptide is the effective tidal power that interacts with the topography, and /8 of the oceans. Therefore, it is useful to measure the total power PIW converted from barotropic tidal motions

  1. Estimation vido haute frquence de la topographie inter-tidale d'une plage sableuse : application la

    E-Print Network [OSTI]

    Estimation vidéo haute fréquence de la topographie inter- tidale d'une plage sableuse : application outil vidéo d'estimation haute fréquence de la topographie inter-tidale. Cet outil est basé sur le suivi : We present a tool to estimate inter-tidal topography using video images. This tool is based

  2. Tidal front affects the size of prey used by a top marine predator, the short-tailed shearwater (Puffinus tenuirostris)

    E-Print Network [OSTI]

    Tidal front affects the size of prey used by a top marine predator, the short-tailed shearwater densities of small euphausiids were associated with a tidal front on the north side of Akutan Pass. At most sites elsewhere in the Bering Sea, away from tidal fronts, shearwaters selected larger (14.2­20.1 mm

  3. OPTICAL DISCOVERY OF PROBABLE STELLAR TIDAL DISRUPTION FLARES

    SciTech Connect (OSTI)

    Van Velzen, Sjoert; Farrar, Glennys R. [Center for Cosmology and Particle Physics, New York University, NY 10003 (United States); Gezari, Suvi [Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218 (United States); Morrell, Nidia [Carnegie Observatories, Las Campanas Observatory, Casillas 601, La Serena (Chile); Zaritsky, Dennis [Steward Observatory, University of Arizona, Tucson, AZ 85721 (United States); Oestman, Linda [Institut de Fisica d'Altes Energies, Universitat Autonoma de Barcelona, E-08193 Bellaterra (Barcelona) (Spain); Smith, Mathew [Department of Mathematics and Applied Mathematics, University of Cape Town, Rondebosch, 7701 (South Africa); Gelfand, Joseph [New York University-Abu Dhabi, Abu Dhabi (United Arab Emirates); Drake, Andrew J., E-mail: s.vanvelzen@astro.ru.nl [Center for Advance Computing Research, California Institute of Technology, Pasadena, CA 91225 (United States)

    2011-11-10

    Using archival Sloan Digital Sky Survey (SDSS) multi-epoch imaging data (Stripe 82), we have searched for the tidal disruption of stars by supermassive black holes in non-active galaxies. Two candidate tidal disruption events (TDEs) are identified. The TDE flares have optical blackbody temperatures of 2 Multiplication-Sign 10{sup 4} K and observed peak luminosities of M{sub g} = -18.3 and -20.4 ({nu}L{sub {nu}} = 5 Multiplication-Sign 10{sup 42}, 4 Multiplication-Sign 10{sup 43} erg s{sup -1}, in the rest frame); their cooling rates are very low, qualitatively consistent with expectations for tidal disruption flares. The properties of the TDE candidates are examined using (1) SDSS imaging to compare them to other flares observed in the search, (2) UV emission measured by GALEX, and (3) spectra of the hosts and of one of the flares. Our pipeline excludes optically identifiable AGN hosts, and our variability monitoring over nine years provides strong evidence that these are not flares in hidden AGNs. The spectra and color evolution of the flares are unlike any SN observed to date, their strong late-time UV emission is particularly distinctive, and they are nuclear at high resolution arguing against these being first cases of a previously unobserved class of SNe or more extreme examples of known SN types. Taken together, the observed properties are difficult to reconcile with an SN or an AGN-flare explanation, although an entirely new process specific to the inner few hundred parsecs of non-active galaxies cannot be excluded. Based on our observed rate, we infer that hundreds or thousands of TDEs will be present in current and next-generation optical synoptic surveys. Using the approach outlined here, a TDE candidate sample with O(1) purity can be selected using geometric resolution and host and flare color alone, demonstrating that a campaign to create a large sample of TDEs, with immediate and detailed multi-wavelength follow-up, is feasible. A by-product of this work is quantification of the power spectrum of extreme flares in AGNs.

  4. Vermont Wetlands Contact and Inquiry Portal | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page| Open Energy Information Serbia-EnhancingEt Al.,Turin, NewArkansas:Standards Jump to: navigation,Wetlands Contact and

  5. Climate and coastal dune vegetation: disturbance, recovery, and succession

    E-Print Network [OSTI]

    Miller, Thomas E.

    Climate and coastal dune vegetation: disturbance, recovery, and succession Thomas E. Miller Æ Elise. Foredune, interdune, and backdune habitats common to most coastal dunes have very different vegetation deterministic trajectories. Keywords Dune habitats Á Succession Á Disturbance Á Coastal vegetation Á Hurricane Á

  6. Circularization of Tidally Disrupted Stars around Spinning Supermassive Black Holes

    E-Print Network [OSTI]

    Hayasaki, Kimitake; Loeb, Abraham

    2015-01-01

    We study the circularization of tidally disrupted stars on bound orbits around spinning supermassive black holes by performing three-dimensional smoothed particle hydrodynamic simulations with Post-Newtonian corrections. Our simulations reveal that debris circularization depends sensitively on the efficiency of radiative cooling. There are two stages in debris circularization if radiative cooling is inefficient: first, the stellar debris streams self-intersect due to relativistic apsidal precession; shocks at the intersection points thermalize orbital energy and the debris forms a geometrically thick, ring-like structure around the black hole. The ring rapidly spreads via viscous diffusion, leading to the formation of a geometrically thick accretion disk. In contrast, if radiative cooling is efficient, the stellar debris circularizes due to self-intersection shocks and forms a geometrically thin ring-like structure. In this case, the dissipated energy can be emitted during debris circularization as a precurso...

  7. A 22 Degree Tidal Tail for Palomar 5

    E-Print Network [OSTI]

    C. J. Grillmair; O. Dionatos

    2006-03-02

    Using Data Release 4 of the Sloan Digital Sky Survey, we have applied an optimal contrast, matched filter technique to trace the trailing tidal tail of the globular cluster Palomar 5 to a distance of 18.5 degrees from the center of the cluster. This more than doubles the total known length of the tail to some 22 degrees on the sky. Based on a simple model of the Galaxy, we find that the stream's orientation on the sky is consistent at the 1.7 sigma level with existing proper motion measurements. We find that a spherical Galactic halo is adequate to model the stream over its currently known length, and we are able to place new constraints on the current space motion of the cluster.

  8. U.S./EUROPEAN PARTNERSHIPS IN COASTAL ATLASES AND COASTAL/OCEAN INFORMATICS

    E-Print Network [OSTI]

    Wright, Dawn Jeannine

    of coastal and ocean data and information), little has been done to take stock of the implications of these efforts or to identify best practices in terms of taking lessons learned into consideration (including

  9. Management of the coastal zone in Small Island Developing States; coastal defences and sustainable tourism 

    E-Print Network [OSTI]

    Chambers, Jennifer

    2014-11-27

    Barbados, as with many Small Island Developing States has a tourism-dependent economy. Climate change and its effects pose a great threat to the coastal tourism facilities the island has to offer, particularly vulnerable are beaches. The government...

  10. Tidal Charged Black Holes as Particle Accelerators to Arbitrarily High Energy

    E-Print Network [OSTI]

    Pradhan, Parthapratim

    2014-01-01

    We show that Randall Sundrum tidal charged spherically symmetric vacuum brane black holes could be act as a particle accelerator with ultrahigh center-of-mass energy in the limiting case of \\emph{ maximal black hole tidal charge}. For non-extremal Randall Sundrum tidal charged black hole, the center-of-mass energy is finite. While for maximally Randall Sundrum tidal charged black hole, the center-of-mass energy is \\emph{infinite}. We have also derived the center-of-mass energy at ISCO(Innermost Stable Circular Orbit) or LSCO(Last Stable Circular Orbit) or MSCO(Marginally Stable Circular Orbit) and MBCO (Marginally Bound Circular Orbit) for maximally Randall Sundrum tidal charged black hole. We show visually the differences between Reissner-Nordstr{\\o}m black hole and Randall Sundrum tidal charged BH. We have found that for maximally Randall Sundrum tidal charged black hole the center-of-mass energy is satisfied the following inequality: $E_{cm}\\mid_{r_{+}}>E_{cm}\\mid_{r_{mb}}>E_{cm}\\mid_{r_{ISCO}}$ i.e. $E_{c...

  11. Tidal Charged Black Holes as Particle Accelerators to Arbitrarily High Energy

    E-Print Network [OSTI]

    Parthapratim Pradhan

    2014-12-28

    We show that Randall Sundrum tidal charged spherically symmetric vacuum brane black holes could be act as a particle accelerator with ultrahigh center-of-mass energy in the limiting case of \\emph{ maximal black hole tidal charge}. For non-extremal Randall Sundrum tidal charged black hole, the center-of-mass energy is finite. While for maximally Randall Sundrum tidal charged black hole, the center-of-mass energy is \\emph{infinite}. We have also derived the center-of-mass energy at ISCO(Innermost Stable Circular Orbit) or LSCO(Last Stable Circular Orbit) or MSCO(Marginally Stable Circular Orbit) and MBCO (Marginally Bound Circular Orbit) for maximally Randall Sundrum tidal charged black hole. We show visually the differences between Reissner-Nordstr{\\o}m black hole and Randall Sundrum tidal charged BH. We have found that for maximally Randall Sundrum tidal charged black hole the center-of-mass energy is satisfied the following inequality: $E_{cm}\\mid_{r_{+}}>E_{cm}\\mid_{r_{mb}}>E_{cm}\\mid_{r_{ISCO}}$ i.e. $E_{cm}\\mid_{r_{+} = \\frac{M}{M_{p}^2}}: E_{cm}\\mid_{r_{mb} = \\left(\\frac{3+\\sqrt{5}}{2}\\right)\\frac{M}{M_{p}^2}}:E_{cm}\\mid_{r_{ISCO} = 4\\frac{M}{M_{p}^2}} = \\infty: 3.23 : 2.6$. Which is exactly \\emph{similar} to the spherically symmetric extreme Reissner-Nordstr\\"{o}m black hole.}

  12. Tidal Energy System for On-Shore Power Generation

    SciTech Connect (OSTI)

    Bruce, Allan J

    2012-06-26

    Addressing the urgent need to develop LCOE competitive renewable energy solutions for US energy security and to replace fossil-fuel generation with the associated benefits to environment impacts including a reduction in CO2 emissions, this Project focused on the advantages of using hydraulic energy transfer (HET) in large-scale Marine Hydrokinetic (MHK) systems for harvesting off-shore tidal energy in US waters. A recent DOE resource assessment, identifies water power resources have a potential to meet 15% of the US electric supply by 2030, with MHK technologies being a major component. The work covered a TRL-4 laboratory proof-in-concept demonstration plus modeling of a 15MW full scale system based on an approach patented by NASA-JPL, in which submerged high-ratio gearboxes and electrical generators in conventional MHK turbine systems are replaced by a submerged hydraulic radial pump coupled to on-shore hydraulic motors driving a generator. The advantages are; first, the mean-time-between-failure (MTBF), or maintenance, can be extended from approximately 1 to 5 years and second, the range of tidal flow speeds which can be efficiently harvested can be extended beyond that of a conventional submerged generator. The approach uses scalable, commercial-off-the-shelf (COTS) components, facilitating scale-up and commercialization. All the objectives of the Project have been successfully met (1) A TRL4 system was designed, constructed and tested. It simulates a tidal energy turbine, with a 2-m diameter blade in up to a 2.9 m/sec flow. The system consists of a drive motor assembly providing appropriate torque and RPM, attached to a radial piston pump. The pump circulates pressurized, environmentally-friendly, HEES hydraulic fluid in a closed loop to an axial piston motor which drives an electrical generator, with a resistive load. The performance of the components, subsystems and system were evaluated during simulated tidal cycles. The pump is contained in a tank for immersion testing. The COTS pump and motor were selected to scale to MW size and were oversized for the TRL-4 demonstration, operating at only 1-6% of rated values. Nevertheless, in for 2-18 kW drive power, in agreement with manufacturer performance data, we measured efficiencies of 85-90% and 75-80% for the pump and motor, respectively. These efficiencies being 95-96% at higher operating powers. (2) Two follow-on paths were identified. In both cases conventional turbine systems can be modified, replacing existing gear box and generator with a hydraulic pump and on-shore components. On a conventional path, a TRL5/6 15kW turbine system can be engineered and tested on a barge at an existing site in Maine. Alternatively, on an accelerated path, a TRL-8 100kW system can be engineered and tested by modifying a team member's existing MHK turbines, with barge and grid-connected test sites in-place. On both paths the work can be expedited and cost effective by reusing TRL-4 components, modifying existing turbines and using established test sites. (3) Sizing, performance modeling and costing of a scaled 15MW system, suitable for operation in Maine's Western Passage, was performed. COTS components are identified and the performance projections are favorable. The estimated LCOE is comparable to wind generation with peak production at high demand times. (4) We determined that a similar HET approach can be extended to on-shore and off-shore wind turbine systems. These are very large energy resources which can be addressed in parallel for even great National benefit. (5) Preliminary results on this project were presented at two International Conferences on renewable energy in 2012, providing a timely dissemination of information. We have thus demonstrated a proof-in-concept of a novel, tidal HET system that eliminates all submerged gears and electronics to improve reliability. Hydraulic pump efficiencies of 90% have been confirmed in simulated tidal flows between 1 and 3 m/s, and at only 1-6% of rated power. Total system efficiencies have also been modeled, up to MW-scale, for ti

  13. Organic Carbon and Disinfection Byproduct Precursor Loads from a Constructed, Non-Tidal Wetland in California's Sacramento–San Joaquin Delta

    E-Print Network [OSTI]

    Fleck, Jacob A.; Fram, Miranda S.; Fujii, Roger

    2007-01-01

    peat soils, Sacramento-San Joaquin Delta, California: Implications for drinking-water quality: U.S. Geological Survey Water-Resources

  14. Workshop report: planning for Coastal Climatologies

    E-Print Network [OSTI]

    Gamble, Douglas W.

    , and assessments on the Atlantic coast of the southeastern United States was convened in October 2003 to facilitate: agriculture, coastal transportation, energy conservation and planning, environmental quality, fishery, and the obstacles to incorporating new technology in decision- making processes. This report provides

  15. Coastal Waters Imaging on GOES-R

    E-Print Network [OSTI]

    Kurapov, Alexander

    Satellites (GOES) have played a key part in the nation's weather prediction capabilities and have been used to include an imaging capability for coastal waters on the next generation of GOES satellites, scheduled changed weather prediction over the last 30 years. In its report to Congress, the U.S. Commission on Ocean

  16. The Economic Value of Resilient Coastal Communities

    E-Print Network [OSTI]

    2 The Economic Value of Resilient Coastal Communities LAST REVISED 3/18/2013 NOAA activities support science, service, and stewardship that protect life, health, and property and create economic value, income, and jobs. Across the agency, we have begun collecting data on the economic importance

  17. Marine Studies Building Fund Coastal Community Challenge

    E-Print Network [OSTI]

    Marine Studies Building Fund Coastal Community Challenge Our Future Is Bright! Marine science synergy in marine science and education among diverse partners ·A long-standing, collaborative, can-do spirit that grows with each success Oregon State University - with Hatfield Marine Science Center as its

  18. Wetland survey of selected areas in the K-24 Site Area of responsibility

    SciTech Connect (OSTI)

    Rosensteel, B.A.; Awl, D.J.

    1995-07-01

    In accordance with DOE Regulations for Compliance with Floodplain/Wetlands Environmental Review Requirements, wetland surveys were conducted in selected areas within the K-25 Area of Responsibility during the summer of 1994. These areas are Mitchell Branch, Poplar Creek, the K-770 OU, Duct Island Peninsula, the Powerhouse area, and the K-25 South Corner. Previously surveyed areas included in this report are the main plant area of the K-25 Site, the K-901 OU, the AVLIS site, and the K-25 South Site. Wetland determinations were based on the USACE methodology. Forty-four separate wetland areas, ranging in size from 0.13 to 4.23 ha, were identified. Wetlands were identified in all of the areas surveyed with the exception of the interior of the Duct Island Peninsula and the main plant area of the K-25 Site. Wetlands perform functions such as floodflow alteration, sediment stabilization, sediment and toxicant retention, nutrient transformation, production export, and support of aquatic species and wildlife diversity and abundance. The forested, scrub-shrub, and emergent wetlands identified in the K-25 area perform some or all of these functions to varying degrees.

  19. Multiscale heterogeneity characterization of tidal channel, tidal delta and foreshore facies, Almond Formation outcrops, Rock Springs uplift, Wyoming

    SciTech Connect (OSTI)

    Schatzinger, R.A.; Tomutsa, L.

    1997-08-01

    In order to accurately predict fluid flow within a reservoir, variability in the rock properties at all scales relevant to the specific depositional environment needs to be taken into account. The present work describes rock variability at scales from hundreds of meters (facies level) to millimeters (laminae) based on outcrop studies of the Almond Formation. Tidal channel, tidal delta and foreshore facies were sampled on the eastern flank of the Rock Springs uplift, southeast of Rock Springs, Wyoming. The Almond Fm. was deposited as part of a mesotidal Upper Cretaceous transgressive systems tract within the greater Green River Basin. Bedding style, lithology, lateral extent of beds of bedsets, bed thickness, amount and distribution of depositional clay matrix, bioturbation and grain sorting provide controls on sandstone properties that may vary more than an order of magnitude within and between depositional facies in outcrops of the Almond Formation. These features can be mapped on the scale of an outcrop. The products of diagenesis such as the relative timing of carbonate cement, scale of cemented zones, continuity of cemented zones, selectively leached framework grains, lateral variability of compaction of sedimentary rock fragments, and the resultant pore structure play an equally important, although less predictable role in determining rock property heterogeneity. A knowledge of the spatial distribution of the products of diagenesis such as calcite cement or compaction is critical to modeling variation even within a single facies in the Almond Fin. because diagenesis can enhance or reduce primary (depositional) rock property heterogeneity. Application of outcrop heterogeneity models to the subsurface is greatly hindered by differences in diagenesis between the two settings. The measurements upon which this study is based were performed both on drilled outcrop plugs and on blocks.

  20. Tidal energy effects of dark matter halos on early-type galaxies

    E-Print Network [OSTI]

    Valentinuzzi, T; D'Onofrio, M

    2010-01-01

    Tidal interactions between neighboring objects span across the whole admissible range of lengths in nature: from, say, atoms to clusters of galaxies i.e. from micro to macrocosms. According to current cosmological theories, galaxies are embedded within massive non-baryonic dark matter (DM) halos, which affects their formation and evolution. It is therefore highly rewarding to understand the role of tidal interaction between the dark and luminous matter in galaxies. The current investigation is devoted to Early-Type Galaxies (ETGs), looking in particular at the possibility of establishing whether the tidal interaction of the DM halo with the luminous baryonic component may be at the origin of the so-called "tilt" of the Fundamental Plane (FP). The extension of the tensor virial theorem to two-component matter distributions implies the calculation of the self potential energy due to a selected subsystem, and the tidal potential energy induced by the other one. The additional assumption of homeoidally striated d...

  1. How does vegetation affect sedimentation on tidal marshes? Investigating particle capture and hydrodynamic controls

    E-Print Network [OSTI]

    Mudd, Simon Marius

    How does vegetation affect sedimentation on tidal marshes? Investigating particle capture stems, or enhanced settling due to a reduction in turbulent kinetic energy within flows through kinetic energy in the fertilized canopy. Our newly developed models of biologically mediated sedimentation

  2. Sudden increase in tidal response linked to calving and acceleration at a large Greenland outlet glacier

    E-Print Network [OSTI]

    de Juan, J.; Elosegui, P.; Nettles, M.; Larsen, T. B.; Davis, J. L.; Hamilton, Gordon S.; Stearns, Leigh; Anderson, M. L.; Ekstrom, G.; Ahlstrom, A. P.; Stenseng, L.; Khan, S. A.; Forsberg, R.

    2010-06-23

    [1] Large calving events at Greenland's largest outlet glaciers are associated with glacial earthquakes and near-instantaneous increases in glacier flow speed. At some glaciers and ice streams, flow is also modulated in a regular way by ocean tidal...

  3. Status of Wave and Tidal Power Technologies for the United States

    SciTech Connect (OSTI)

    Musial, W.

    2008-08-01

    This paper presents the status of marine applications for renewable energy as of 2008 from a U.S. perspective. Technologies examined include wave, tidal, and ocean current energy extraction devices.

  4. Maine Project Takes Historic Step Forward in U.S. Tidal Energy...

    Energy Savers [EERE]

    contracts will be in place for 20 years -- making them the first long-term tidal energy power purchase agreements in the United States. The implications of these agreements are...

  5. Dispersion Mechanisms of a Tidal River Junction in the Sacramento–San Joaquin Delta, California

    E-Print Network [OSTI]

    Gleichauf, Karla T.; Wolfram, Phillip J.; Monsen, Nancy E.; Fringer, Oliver B.; Monismith, Stephen G.

    2014-01-01

    a Tidal River Junction in the Sacramento–San Joaquin Delta,networks, such as in the Sacramento–San Joaquin River Delta,transport and fate in the Sacramento–San Joaquin delta using

  6. Microsoft Word - RM1_Tidal Turbine_NREL Bir, Lawson, Li_2011...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Arctic Engineering OMAE2011 June 19-24, 20111, Rotterdam, the Netherland OMAE2011-50063 STRUCTURAL DESIGN OF A HORIZONTAL-AXIS TIDAL CURRENT TURBINE COMPOSITE BLADE ABSTRACT This...

  7. ORGANIC MATTER DISTRIBUTION AND TURNOVER ALONG A GRADIENT FROM FOREST TO TIDAL CREEK

    E-Print Network [OSTI]

    Lawrence, Deborah

    i ORGANIC MATTER DISTRIBUTION AND TURNOVER ALONG A GRADIENT FROM FOREST TO TIDAL CREEK A Thesis. A nested plot design was used to harvest vegetation, obtain soil cores, and collect quantitative data... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .18 Qualitative Vegetation Analysis

  8. Maine Deploys First U.S. Commercial, Grid-Connected Tidal Energy...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    of President Obama's all-of-the-above energy strategy to create jobs and strengthen U.S. global competitiveness," said Energy Secretary Steven Chu. "The Eastport tidal energy...

  9. Measurement of the rate of stellar tidal disruption flares

    SciTech Connect (OSTI)

    Van Velzen, Sjoert

    2014-09-01

    We report an observational estimate of the rate of stellar tidal disruption flares (TDFs) in inactive galaxies based on a successful search for these events among transients in galaxies using archival Sloan Digital Sky Survey (SDSS) multi-epoch imaging data (Stripe 82). This search yielded 186 nuclear flares in galaxies, 2 of which are excellent TDF candidates. Because of the systematic nature of the search, the very large number of galaxies, the long time of observation, and the fact that non-TDFs were excluded without resorting to assumptions about TDF characteristics, this study provides an unparalleled opportunity to measure the TDF rate. To compute the rate of optical stellar tidal disruption events, we simulate our entire pipeline to obtain the efficiency of detection. The rate depends on the light curves of TDFs, which are presently still poorly constrained. Using only the observed part of the SDSS light curves gives a model-independent upper limit to the optical TDF rate, N-dot <2×10{sup ?4} yr{sup ?1} galaxy{sup ?1} (90% CL), under the assumption that the SDSS TDFs are representative examples. We develop three empirical models of the light curves based on the two SDSS light curves and two more recent and better-sampled Pan-STARRS TDF light curves, leading to our best estimate of the rate: N-dot {sub TDF}=(1.5--2.0){sub ?1.3}{sup +2.7}×10{sup ?5} yr{sup ?1} galaxy{sup ?1}. We explore the modeling uncertainties by considering two theoretically motivated light curve models, as well as two different relationships between black hole mass and galaxy luminosity, and two different treatments of the cutoff in the visibility of TDFs at large M {sub BH}. From this we conclude that these sources of uncertainty are not significantly larger than the statistical ones. Our results are applicable for galaxies hosting black holes with mass in the range of a few 10{sup 6}-10{sup 8} M {sub ?}, and translates to a volumetric TDF rate of (4-8) × 10{sup –8±0.4} yr{sup –1} Mpc{sup –3}, with the statistical uncertainty in the exponent.

  10. Private Takings of Endangered Species as Public Nuisance: Lucas v. South Carolina Coastal Council and the Endangered Species Act

    E-Print Network [OSTI]

    Murray, Paula C.

    1993-01-01

    82. Id. 83. Lucas v. South Carolina Coastal Council, 404Public Nuisance: Lucas v. South Carolina Coastal Council andlanguage. ). 23. Lucas v. South Carolina Coastal Council,

  11. The Importance of Emergent Vegetation in Reducing Sediment Resuspension in Wetlands

    E-Print Network [OSTI]

    ,-Resuspension in Wetlands, USA 57007 r I .. ABSTRACT Wind-induced resuspension of bottom sediment was measured with sediment traps in Sand Lake National Wildlife Refuge, South Dakota. Resuspension was significantly greater

  12. Potential for N pollution swapping from riparian buffer strips and an instream wetland 

    E-Print Network [OSTI]

    Boukelia, Willena Esther

    2012-11-29

    Diffuse agricultural pollution is a major contributor to poor water quality in many parts of the world. Consequently agri-environment policy promotes the use of riparian buffer strips and/or denitrifying wetlands to ...

  13. Wetland model in an earth systems modeling framework for regional environmental policy analysis

    E-Print Network [OSTI]

    Awadalla, Sirein Salah

    2011-01-01

    The objective of this research is to investigate incorporating a wetland component into a land energy and water fluxes model, the Community Land Model (CLM). CLM is the land fluxes component of the Integrated Global Systems ...

  14. Channel Design to Increase Wastewater Treatment Wetland Capacity and Connectivity in Stockton, CA

    E-Print Network [OSTI]

    Cubbison, Erin O.

    2006-01-01

    stage, the facultative algal ponds, to the west edge of thewater from the facultative algal ponds, one of the stages ofof the channel, the Algal Ponds, to its end, the wetlands,

  15. Fish ecology of a wetland in the southern Western Ghats, India 

    E-Print Network [OSTI]

    Grubh, Archis Robert

    2002-01-01

    Fish assemblages and abiotic environmental conditions in a wetland in the Western Ghats, southern India, were investigated from August 2000 to July 2001. Rainfall showed a seasonal pattern of dry, major wet, and minor wet ...

  16. The role of seasonal wetlands in the ecology of the American alligator 

    E-Print Network [OSTI]

    Subalusky, Amanda Lee

    2009-05-15

    populations to determine the most effective method of studying alligators in seasonal wetlands. I then used systematic trapping, nest surveys and radio telemetry to determine habitat use and overland movement rates by different sex and size classes. I found...

  17. Jurisdictional waters of the United States Wetlands Assessment Analysis and Delineation 

    E-Print Network [OSTI]

    Siems-Alford, Susan

    1994-01-01

    To improve and develop my professional skills, a wetland assessment and delineation was performed for Lakewood Heights, a proposed residential subdivision consisting of 133 hectares, more or less, located in northeast Harris County, Texas...

  18. Wastewater treatment and flow patterns in an onsite subsurface flow constructed wetland 

    E-Print Network [OSTI]

    Stecher, Matthew C

    2001-01-01

    Subsurface flow constructed wetlands (SFCWs) are becoming increasingly common as a secondary treatment of onsite domestic wastewater. Even though SFCWs are being used widely, sufficient data has not been collected to determine how parameters...

  19. Regular Inspection and Maintenance Guidance for Gravel Wetland Stormwater Management Device

    E-Print Network [OSTI]

    5 Regular Inspection and Maintenance Guidance for Gravel Wetland Stormwater Management Device and not a criterion for cleaning. Rather, stormwater access to subsurface treatment is by way of inlet standpipes

  20. Non point source pollution modelling in the watershed managed by Integrated Conctructed Wetlands: A GIS approach. 

    E-Print Network [OSTI]

    Vyavahare, Nilesh

    2008-12-05

    The non-point source pollution has been recognised as main cause of eutrophication in Ireland (EPA Ireland, 2001). Integrated Constructed Wetland (ICW) is a management practice adopted in Annestown stream watershed, located ...

  1. Analysis of the efficacy of a constructed wetland in treating human fecal contamination

    E-Print Network [OSTI]

    Kondepudi, Kathyayani Shobhna

    2012-01-01

    The efficiency of a system of constructed wetlands in treating non-point source pollution, particularly, human fecal contamination, was evaluated by collecting and analyzing water samples using both conventional culture-based ...

  2. Evaluation of a shoreline cleaner for enhanced removal of petroleum from a wetland 

    E-Print Network [OSTI]

    Bizzell, Cydney Jill

    2000-01-01

    releasing petroleum products that impacted the shoreline. Since 1994, three controlled oil applications (1996 and 1997) were conducted to evaluate proposed remediation strategies for wetland environments including nutrient additions, oxidant additions...

  3. FAINT TIDAL FEATURES IN GALAXIES WITHIN THE CANADA-FRANCE-HAWAII TELESCOPE LEGACY SURVEY WIDE FIELDS

    SciTech Connect (OSTI)

    Atkinson, Adam M.; Abraham, Roberto G.; Ferguson, Annette M. N.

    2013-03-01

    We present an analysis of the detectability of faint tidal features in galaxies from the wide-field component of the Canada-France-Hawaii Telescope Legacy Survey. Our sample consists of 1781 luminous (M{sub r{sup '}}<-19.3 mag) galaxies in the magnitude range 15.5 mag < r' < 17 mag and in the redshift range 0.04 < z < 0.2. Although we have classified tidal features according to their morphology (e.g., streams, shells, and tails), we do not attempt to interpret them in terms of their physical origin (e.g., major versus minor merger debris). Instead, we provide a catalog that is intended to provide raw material for future investigations which will probe the nature of low surface brightness substructure around galaxies. We find that around 12% of the galaxies in our sample show clear tidal features at the highest confidence level. This fraction rises to about 18% if we include systems with convincing, albeit weaker tidal features, and to 26% if we include systems with more marginal features that may or may not be tidal in origin. These proportions are a strong function of rest-frame color and of stellar mass. Linear features, shells, and fans are much more likely to occur in massive galaxies with stellar masses >10{sup 10.5} M {sub Sun }, and red galaxies are twice as likely to show tidal features than are blue galaxies.

  4. Gravitational self-force corrections to two-body tidal interactions and the effective one-body formalism

    E-Print Network [OSTI]

    Donato Bini; Thibault Damour

    2014-09-24

    Tidal interactions have a significant influence on the late dynamics of compact binary systems, which constitute the prime targets of the upcoming network of gravitational-wave detectors. We refine the theoretical description of tidal interactions (hitherto known only to the second post-Newtonian level) by extending our recently developed analytic self-force formalism, for extreme mass-ratio binary systems, to the computation of several tidal invariants. Specifically, we compute, to linear order in the mass ratio and to the 7.5$^{\\rm th}$ post-Newtonian order, the following tidal invariants: the square and the cube of the gravitoelectric quadrupolar tidal tensor, the square of the gravitomagnetic quadrupolar tidal tensor, and the square of the gravitoelectric octupolar tidal tensor. Our high-accuracy analytic results are compared to recent numerical self-force tidal data by Dolan et al. \\cite{Dolan:2014pja}, and, notably, provide an analytic understanding of the light ring asymptotic behavior found by them. We transcribe our kinematical tidal-invariant results in the more dynamically significant effective one-body description of the tidal interaction energy. By combining, in a synergetic manner, analytical and numerical results, we provide simple, accurate analytic representations of the global, strong-field behavior of the gravitoelectric quadrupolar tidal factor. A striking finding is that the linear-in-mass-ratio piece in the latter tidal factor changes sign in the strong-field domain, to become negative (while its previously known second post-Newtonian approximant was always positive). We, however, argue that this will be more than compensated by a probable fast growth, in the strong-field domain, of the nonlinear-in-mass-ratio contributions in the tidal factor.

  5. The Coastal Ocean Prediction Systems program: Understanding and managing our coastal ocean. Volume 1: Strategic summary

    SciTech Connect (OSTI)

    Not Available

    1990-05-15

    The proposed COPS (Coastal Ocean Prediction Systems) program is concerned with combining numerical models with observations (through data assimilation) to improve our predictive knowledge of the coastal ocean. It is oriented toward applied research and development and depends upon the continued pursuit of basic research in programs like COOP (Coastal Ocean Processes); i.e., to a significant degree it is involved with ``technology transfer`` from basic knowledge to operational and management applications. This predictive knowledge is intended to address a variety of societal problems: (1) ship routing, (2) trajectories for search and rescue operations, (3) oil spill trajectory simulations, (4) pollution assessments, (5) fisheries management guidance, (6) simulation of the coastal ocean`s response to climate variability, (7) calculation of sediment transport, (8) calculation of forces on structures, and so forth. The initial concern is with physical models and observations in order to provide a capability for the estimation of physical forces and transports in the coastal ocean. For all these applications, there are common needs for physical field estimates: waves, tides, currents, temperature, and salinity, including mixed layers, thermoclines, fronts, jets, etc. However, the intent is to work with biologists, chemists, and geologists in developing integrated multidisciplinary prediction systems as it becomes feasible to do so. From another perspective, by combining observations with models through data assimilation, a modern approach to monitoring is provided through whole-field estimation.

  6. Wetlands, Microbes, and the Carbon Cycle: Behind the Scenes @ Berkeley Lab

    SciTech Connect (OSTI)

    Tringe, Susannah

    2012-01-01

    Susannah Tringe, who leads the Metagenome Program at the Department of Energy's Joint Genome Institute (JGI), a collaboration in which Berkeley Lab plays a leading role, takes us behind the scenes to show how DNA from unknown wild microbes is extracted and analyzed to see what role they play in the carbon cycle. Tringe collects samples of microbial communities living in the wetland muck of the Sacramento-San Joaquin River Delta, organisms that can determine how these wetlands store or release carbon.

  7. Wetlands, Microbes, and the Carbon Cycle: Behind the Scenes @ Berkeley Lab

    ScienceCinema (OSTI)

    Tringe, Susannah

    2013-05-29

    Susannah Tringe, who leads the Metagenome Program at the Department of Energy's Joint Genome Institute (JGI), a collaboration in which Berkeley Lab plays a leading role, takes us behind the scenes to show how DNA from unknown wild microbes is extracted and analyzed to see what role they play in the carbon cycle. Tringe collects samples of microbial communities living in the wetland muck of the Sacramento-San Joaquin River Delta, organisms that can determine how these wetlands store or release carbon.

  8. Unusual sedimentation of a Galveston Bay wetland at Pine Gully, Seabrook, Texas: implications for beach renourishment 

    E-Print Network [OSTI]

    Culver, Wesley Richard

    2009-06-02

    OF A GALVESTON BAY WETLAND AT PINE GULLY, SEABROOK, TEXAS: IMPLICATIONS FOR BEACH RENOURISHMENT A Thesis by WESLEY RICHARD CULVER Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE August 2007 Major Subject: Geology UNUSUAL SEDIMENTATION OF A GALVESTON BAY WETLAND AT PINE GULLY, SEABROOK, TEXAS: IMPLICATIONS FOR BEACH RENOURISHMENT A Thesis by WESLEY RICHARD CULVER...

  9. Thermal Spray Coatings for Coastal Infrastructure

    SciTech Connect (OSTI)

    Holcomb, G.R.; Covino, BernardS. Jr.; Cramer, S.D.; Bullard, S.J.

    1997-11-01

    Several protection strategies for coastal infrastructure using thermal-spray technology are presented from research at the Albany Research Center. Thermal-sprayed zinc coatings for anodes in impressed current cathodic protection systems are used to extend the service lives of reinforced concrete bridges along the Oregon coast. Thermal-sprayed Ti is examined as an alternative to the consumable zinc anode. Sealed thermal-sprayed Al is examined as an alternative coating to zinc dust filled polyurethane paint for steel structures.

  10. Texas GLO Coastal Forms | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page| Open Energy Information Serbia-EnhancingEt Al., 2013) | Opensource HistoryTerraWattTestingMissouri: EnergyCoastal

  11. Comparing the escape dynamics in tidally limited star cluster models

    E-Print Network [OSTI]

    Euaggelos E. Zotos

    2015-08-21

    The aim of this work is to compare the orbital dynamics in three different models describing the properties of a star cluster rotating around its parent galaxy in a circular orbit. In particular, we use the isochrone and the Hernquist potentials to model the spherically symmetric star cluster and we compare our results with the corresponding ones of a previous work in which the Plummer model was applied for the same purpose. Our analysis takes place both in the configuration $(x,y)$ and in the phase $(x,\\dot{x})$ space in order to elucidate the escape process as well as the overall orbital properties of the tidally limited star cluster. We restrict our investigation into two dimensions and we conduct a thorough numerical analysis distinguishing between ordered and chaotic orbits as well as between trapped and escaping orbits, considering only unbounded motion for several energy levels above the critical escape energy. It is of particular interest to determine the escape basins towards the two exit channels (near the Lagrangian points $L_1$ and $L_2$) and relate them with the corresponding escape times of the orbits.

  12. "Circularization" vs. Accretion -- What Powers Tidal Disruption Events?

    E-Print Network [OSTI]

    Piran, Tsvi; Krolik, Julian; Cheng, Roseanne M; Shiokawa, Hotaka

    2015-01-01

    A tidal disruption event (TDE) takes place when a star passes near enough to a massive black hole to be disrupted. About half the star's matter is given elliptical trajectories with large apocenter distances, the other half is unbound. To "circularize", i.e., to form an accretion flow, the bound matter must lose a significant amount of energy, with the actual amount depending on the characteristic scale of the flow measured in units of the black hole's gravitational radius (~ 10^{51} (R/1000R_g)^{-1} erg). Recent numerical simulations (Shiokawa et al., 2015) have revealed that the circularization scale is close to the scale of the most-bound initial orbits, ~ 10^3 M_{BH,6.5}^{-2/3} R_g ~ 10^{15} M_{BH,6.5}^{1/3} cm from the black hole, and the corresponding circularization energy dissipation rate is $\\sim 10^{44} M_{BH,6.5}^{-1/6}$~erg/s. We suggest that the energy liberated during circularization, rather then energy liberated by accretion onto the black hole, powers the observed optical TDE candidates (e.g.A...

  13. Comparing the escape dynamics in tidally limited star cluster models

    E-Print Network [OSTI]

    Zotos, Euaggelos E

    2015-01-01

    The aim of this work is to compare the orbital dynamics in three different models describing the properties of a star cluster rotating around its parent galaxy in a circular orbit. In particular, we use the isochrone and the Hernquist potentials to model the spherically symmetric star cluster and we compare our results with the corresponding ones of a previous work in which the Plummer model was applied for the same purpose. Our analysis takes place both in the configuration $(x,y)$ and in the phase $(x,\\dot{x})$ space in order to elucidate the escape process as well as the overall orbital properties of the tidally limited star cluster. We restrict our investigation into two dimensions and we conduct a thorough numerical analysis distinguishing between ordered and chaotic orbits as well as between trapped and escaping orbits, considering only unbounded motion for several energy levels above the critical escape energy. It is of particular interest to determine the escape basins towards the two exit channels (n...

  14. Tidal Downsizing Model. IV. Destructive feedback in planets

    E-Print Network [OSTI]

    Nayakshin, Sergei

    2015-01-01

    I argue that feedback is as important to formation of planets as it is to formation of stars and galaxies. Energy released by massive solid cores puffs up pre-collapse gas giant planets, making them vulnerable to tidal disruptions by their host stars. I find that feedback is the ultimate reason for some of the most robust properties of the observed exoplanet populations: the rarity of gas giants at all separations from $\\sim 0.1$ to $\\sim 100$~AU, the abundance of $\\sim 10 M_\\oplus$ cores but dearth of planets more massive than $\\sim 20 M_\\oplus$. Feedback effects can also explain (i) rapid assembly of massive cores at large separations as needed for Uranus, Neptune and the suspected HL Tau planets; (ii) the small core in Jupiter yet large cores in Uranus and Neptune; (iii) the existence of rare "metal monster" planets such as CoRoT-20b, a gas giant made of heavy elements by up to $\\sim 50$\\%.

  15. WATER TRAPPING ON TIDALLY LOCKED TERRESTRIAL PLANETS REQUIRES SPECIAL CONDITIONS

    SciTech Connect (OSTI)

    Yang, Jun; Abbot, Dorian S.; Liu, Yonggang; Hu, Yongyun

    2014-12-01

    Surface liquid water is essential for standard planetary habitability. Calculations of atmospheric circulation on tidally locked planets around M stars suggest that this peculiar orbital configuration lends itself to the trapping of large amounts of water in kilometers-thick ice on the night side, potentially removing all liquid water from the day side where photosynthesis is possible. We study this problem using a global climate model including coupled atmosphere, ocean, land, and sea ice components as well as a continental ice sheet model driven by the climate model output. For a waterworld, we find that surface winds transport sea ice toward the day side and the ocean carries heat toward the night side. As a result, nightside sea ice remains O(10 m) thick and nightside water trapping is insignificant. If a planet has large continents on its night side, they can grow ice sheets O(1000 m) thick if the geothermal heat flux is similar to Earth's or smaller. Planets with a water complement similar to Earth's would therefore experience a large decrease in sea level when plate tectonics drives their continents onto the night side, but would not experience complete dayside dessiccation. Only planets with a geothermal heat flux lower than Earth's, much of their surface covered by continents, and a surface water reservoir O(10%) of Earth's would be susceptible to complete water trapping.

  16. Jet and disk luminosities in tidal disruption events

    E-Print Network [OSTI]

    Piran, Tsvi; Tchekhovskoy, Alexander

    2015-01-01

    Tidal disruption events (TDE) in which a star is devoured by a massive black hole at a galac- tic center pose a challenge to our understanding of accretion processes. Within a month the accretion rate reaches super-Eddington levels. It then drops gradually over a time scale of a year to sub-Eddington regimes. The initially geometrically thick disk becomes a thin one and eventually an ADAF at very low accretion rates. As such, TDEs explore the whole range of accretion rates and configurations. A challenging question is what the corresponding light curves of these events are. We explore numerically the disk luminosity and the conditions within the inner region of the disk using a fully general relativistic slim disk model. Those conditions determine the magnitude of the magnetic field that engulfs the black hole and this, in turn, determines the Blandford-Znajek jet power. We estimate this power in two different ways and show that they are self-consistent. We find, as expected earlier from analytic argu- ments ...

  17. SKA as a powerful hunter of jetted Tidal Disruption Events

    E-Print Network [OSTI]

    Donnarumma, I; Fender, R; Komossa, S; Paragi, Z; Van Velzen, S; Prandoni, I

    2015-01-01

    Observational consequences of the tidal disruption of stars by supermassive black holes (SMBHs) can enable us to discover quiescent SMBHs and constrain their mass function. Moreover, observing jetted TDEs (from previously non-active galaxies) provides us with a new means of studying the early phases of jet formation and evolution in an otherwise "pristine" environment. Although several (tens) TDEs have been discovered since 1999, only two jetted TDEs have been recently discovered in hard X-rays, and only one, Swift J1644+57, has a precise localization which further supports the TDE interpretation. These events alone are not sufficient to address those science issues, which require a substantial increase of the current sample. Despite the way they were discovered, the highest discovery potential for {\\em jetted} TDEs is not held by current and up-coming X-ray instruments, which will yield only a few to a few tens events per year. In fact, the best strategy is to use the Square Kilometer Array to detect TDEs an...

  18. "Circularization" vs. Accretion -- What Powers Tidal Disruption Events?

    E-Print Network [OSTI]

    Tsvi Piran; Gilad Svirski; Julian Krolik; Roseanne M. Cheng; Hotaka Shiokawa

    2015-04-07

    A tidal disruption event (TDE) takes place when a star passes near enough to a massive black hole to be disrupted. About half the star's matter is given elliptical trajectories with large apocenter distances, the other half is unbound. To "circularize", i.e., to form an accretion flow, the bound matter must lose a significant amount of energy, with the actual amount depending on the characteristic scale of the flow measured in units of the black hole's gravitational radius ($\\sim 10^{51} (R/1000R_g)^{-1}$~erg). Recent numerical simulations \\citep{Shiokawa+2015} have revealed that the circularization scale is close to the scale of the most-bound initial orbits, $\\sim 10^3 M_{BH,6.5}^{-2/3} R_g \\sim 10^{15} M_{BH,6.5}^{1/3}$~cm from the black hole, and the corresponding circularization energy dissipation rate is $\\sim 10^{44} M_{BH,6.5}^{-1/6}$~erg/s. We suggest that the energy liberated during circularization, rather then energy liberated by accretion onto the black hole, powers the observed optical TDE candidates. The observed rise times, luminosities, temperatures, emission radii, and line widths seen in these TDEs \\citep[e.g.][]{Arcavi+2014} are all more readily explained in terms of heating associated with circularization than in terms of accretion.

  19. Tidal Accelerometry: Exploring the Cosmos Via Gravitational Correlations

    E-Print Network [OSTI]

    Datta, Timir; Wescott, Mike; Jeong, Yeuncheol; Morawiec, Pawel; Gambrell, James; Overcash, Dan; Zhang, Huaizhou; Voulgaris, George

    2010-01-01

    Newtonian gravitation is non-radiative but is extremely pervasive and penetrates equally into every media because it cannot be shielded. The extra terrestrial fgravity is responsible for earth's trajectory. However its correlation or geodesic deviation is manifested as semi-diurnal and diurnal tides. Tidal signals, A(t) are temporal modulations in the field differential which can be observed in a wide variety of natural and laboratory situations. A(t) is a quasi-static, low frequency signal which arises from the relative changes in positions of the detector and source and is not part of the electromagnetic spectrum. Isaac Newton was the first to recognize the importance of tides in astrometry and attempetd to estimate lunar mass from ocean tides. By a case study we show, how the systematics of the gravitational correlation can be used for calibration and de-trending which can significantly increase the confidence level of high precision experiments. A(t) can also be used to determine the distribution of celes...

  20. Seasonally-managed wetland footprint delineation using Landsat ETM+ satellite imagery

    SciTech Connect (OSTI)

    Quinn, N.W.T.; Epshtein, O.

    2013-12-15

    One major challenge in water resource management is the estimation of evapotranspiration losses from seasonally managed wetlands. Quantifying these losses is complicated by the dynamic nature of the wetlands’ areal footprint during the periods of flood-up and drawdown. In this study we present a data-lean solution to this problem using an example application in the San Joaquin River Basin of California, USA. Through analysis of high-resolution (30 meter) Landsat Enhanced Thematic Mapper Plus (ETM+) satellite imagery, we develop a metric for more fully capturing the extent of total flooded wetland area. The procedure is validated using year-long, continuously-logged field datasets at two separate wetlands within the study area. Based on this record, the proposed classification using a Landsat ETM+ Band 5 (mid-IR wavelength) to Band 2 (visible green wavelength) ratio improves estimates by 30-50% relative to previous attempts at wetland delineation. Requiring modest ancillary data, the results of our study provide a practical and efficient option for wetland management in data-sparse regions or un-gauged watersheds.

  1. Hydrology of a Forested Wetland Complex in an Urbanizing Area of the Texas Gulf Coast and Clean Water Act Implications 

    E-Print Network [OSTI]

    Dean, Dex Daniel

    2014-12-15

    . ................................................................ 28 Fig. 5. Monthly precipitation and runoff for 2005–2009.. ............................................... 31 Fig. 6. Annual hydrographs (2005–2008) of daily precipitation and runoff data (axes plotted at different scales for clarity... methods (e.g. Smith et al. 1995, Johnson 2005, Reif et al. 2009, Lane and D’Amico 2010), nation-wide wetland extent (see the National Wetlands Inventory, U.S. Fish and Wildlife Service, available at 6 http://www.fws.gov/wetlands), and impacts...

  2. Scaling laws to understand tidal dissipation in fluid planetary regions and stars I - Rotation, stratification and thermal diffusivity

    E-Print Network [OSTI]

    Auclair-Desrotour, P; Poncin-Lafitte, C Le

    2015-01-01

    Tidal dissipation in planets and stars is one of the key physical mechanisms driving the evolution of star-planet and planet-moon systems. Several signatures of its action are observed in planetary systems thanks to their orbital architecture and the rotational state of their components. Tidal dissipation inside the fluid layers of celestial bodies are intrinsically linked to the dynamics and the physical properties of the latter. This complex dependence must be characterized. We compute the tidal kinetic energy dissipated by viscous friction and thermal diffusion in a rotating local fluid Cartesian section of a star/planet/moon submitted to a periodic tidal forcing. The properties of tidal gravito-inertial waves excited by the perturbation are derived analytically as explicit functions of the tidal frequency and local fluid parameters (i.e. the rotation, the buoyancy frequency characterizing the entropy stratification, viscous and thermal diffusivities) for periodic normal modes. The sensitivity of the resul...

  3. Potential Oil Production from the Coastal Plain of the Arctic...

    Annual Energy Outlook [U.S. Energy Information Administration (EIA)]

    Potential Oil Production from the Coastal Plain of the Arctic National Wildlife Refuge: Updated Assessment Glossary ANILCA: Alaska National Interest Lands Conservation Act ANS:...

  4. Potential Oil Production from the Coastal Plain of the Arctic...

    U.S. Energy Information Administration (EIA) Indexed Site

    Potential Oil Production from the Coastal Plain of the Arctic National Wildlife Refuge: Updated Assessment Executive Summary This Service Report, Potential Oil Production from the...

  5. EPA Coastal Zone Act Reauthorization Amendments (CZARA) Section...

    Open Energy Info (EERE)

    6217 Webpage Abstract This webpage provides an overview of the Coastal Nonpoint Pollution Control Program (16 U.S.C. Chapter 33) which addresses nonpoint pollution problems...

  6. Potential Oil Production from the Coastal Plain of the Arctic...

    U.S. Energy Information Administration (EIA) Indexed Site

    Potential Oil Production from the Coastal Plain of the Arctic National Wildlife Refuge: Updated Assessment 2. Analysis Discussion Resource Assessment The USGS most recent...

  7. Otolith elemental signatures reflect residency in coastal water masses

    E-Print Network [OSTI]

    Nishimoto, Mary M.; Washburn, Libe; Warner, Robert R.; Love, Milton S.; Paradis, Georges L.

    2010-01-01

    residency in coastal water masses Mary M. Nishimoto & LibeSebastes jordani) resid- ing in water masses with distinctthat resided in different water masses that were associated

  8. Modeling Water and Sediment Quality in the Coastal Ocean

    E-Print Network [OSTI]

    Stolzenbach, Keith D.; McWilliams, James C.

    2008-01-01

    ecosystem, oceanography, pollution, sediment, stratification193 Modeling Water and Sediment Quality in the Coastal Oceana model of water and sediment quality capable of forecasting

  9. Subtropical catastrophe: Significant loss of low-mode tidal energy at J. A. MacKinnon and K. B. Winters

    E-Print Network [OSTI]

    MacKinnon, Jennifer

    Subtropical catastrophe: Significant loss of low-mode tidal energy at 28.9°° J. A. MacKinnon and K with a northward baroclinic tidal flux of approximately 1.7 kW/m. After an initial spinup period, energy is quickly of low-mode tidal energy at 28.9°, Geophys. Res. Lett., 32, L15605, doi:10.1029/ 2005GL023376. 1

  10. Two-and three-dimensional double-sandbar system behaviour under intense wave forcing and a mesomacro tidal range

    E-Print Network [OSTI]

    ­macro tidal range R. Almar a,b,Ã, B. Castelle a,b , B.G. Ruessink c , N. Se´ne´chal a,b , P. Bonneton a,b , V­macro tidal environment Storm impact Nearshore Video imaging Short-term morphodynamics Truc Vert Beach a b s t r a c t Five weeks of hourly, 10-min time-exposure video images were used to analyze the meso­macro-tidal

  11. Dispersion mechanisms of a tidal river junction in the Sacramento–San Joaquin Delta, California

    SciTech Connect (OSTI)

    Gleichauf, Karla T.; Wolfram, Philip J.; Monsen, Nancy E.; Fringer, Oliver B.; Monismith, Stephen G.

    2014-12-17

    In branching channel networks, such as in the Sacramento–San Joaquin River Delta, junction flow dynamics contribute to dispersion of ecologically important entities such as fish, pollutants, nutrients, salt, sediment, and phytoplankton. Flow transport through a junction largely arises from velocity phasing in the form of divergent flow between junction channels for a portion of the tidal cycle. Field observations in the Georgiana Slough junction, which is composed of the North and South Mokelumne rivers, Georgiana Slough, and the Mokelumne River, show that flow phasing differences between these rivers arise from operational, riverine, and tidal forcing. A combination of Acoustic Doppler Current Profile (ADCP) boat transecting and moored ADCPs over a spring–neap tidal cycle (May to June 2012) monitored the variability of spatial and temporal velocity, respectively. Two complementary drifter studies enabled assessment of local transport through the junction to identify small-scale intrajunction dynamics. We supplemented field results with numerical simulations using the SUNTANS model to demonstrate the importance of phasing offsets for junction transport and dispersion. Different phasing of inflows to the junction resulted in scalar patchiness that is characteristic of MacVean and Stacey’s (2011) advective tidal trapping. Furthermore, we observed small-scale junction flow features including a recirculation zone and shear layer, which play an important role in intra-junction mixing over time scales shorter than the tidal cycle (i.e., super-tidal time scales). Thus, the study period spanned open- and closed-gate operations at the Delta Cross Channel. Synthesis of field observations and modeling efforts suggest that management operations related to the Delta Cross Channel can strongly affect transport in the Delta by modifying the relative contributions of tidal and riverine flows, thereby changing the junction flow phasing.

  12. Dispersion mechanisms of a tidal river junction in the Sacramento–San Joaquin Delta, California

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Gleichauf, Karla T.; Wolfram, Philip J.; Monsen, Nancy E.; Fringer, Oliver B.; Monismith, Stephen G.

    2014-12-17

    In branching channel networks, such as in the Sacramento–San Joaquin River Delta, junction flow dynamics contribute to dispersion of ecologically important entities such as fish, pollutants, nutrients, salt, sediment, and phytoplankton. Flow transport through a junction largely arises from velocity phasing in the form of divergent flow between junction channels for a portion of the tidal cycle. Field observations in the Georgiana Slough junction, which is composed of the North and South Mokelumne rivers, Georgiana Slough, and the Mokelumne River, show that flow phasing differences between these rivers arise from operational, riverine, and tidal forcing. A combination of Acoustic Dopplermore »Current Profile (ADCP) boat transecting and moored ADCPs over a spring–neap tidal cycle (May to June 2012) monitored the variability of spatial and temporal velocity, respectively. Two complementary drifter studies enabled assessment of local transport through the junction to identify small-scale intrajunction dynamics. We supplemented field results with numerical simulations using the SUNTANS model to demonstrate the importance of phasing offsets for junction transport and dispersion. Different phasing of inflows to the junction resulted in scalar patchiness that is characteristic of MacVean and Stacey’s (2011) advective tidal trapping. Furthermore, we observed small-scale junction flow features including a recirculation zone and shear layer, which play an important role in intra-junction mixing over time scales shorter than the tidal cycle (i.e., super-tidal time scales). Thus, the study period spanned open- and closed-gate operations at the Delta Cross Channel. Synthesis of field observations and modeling efforts suggest that management operations related to the Delta Cross Channel can strongly affect transport in the Delta by modifying the relative contributions of tidal and riverine flows, thereby changing the junction flow phasing.« less

  13. Patterns in wetland microbial community composition and functional gene repertoire associated with methane emissions

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    He, Shaomei; Malfatti, Stephanie A.; McFarland, Jack W.; Anderson, Frank E.; Pati, Amrita; Huntemann, Marcel; Tremblay, Julien; Glavina del Rio, Tijana; Waldrop, Mark P.; Windham-Myers, Lisamarie; et al

    2015-05-19

    Wetland restoration on peat islands previously drained for agriculture has potential to reverse land subsidence and sequester atmospheric carbon dioxide as peat accretes. However, the emission of methane could potentially offset the greenhouse gas benefits of captured carbon. As microbial communities play a key role in governing wetland greenhouse gas fluxes, we are interested in how microbial community composition and functions are associated with wetland hydrology, biogeochemistry, and methane emission, which is critical to modeling the microbial component in wetland methane fluxes and to managing restoration projects for maximal carbon sequestration. Here, we couple sequence-based methods with biogeochemical and greenhousemore »gas measurements to interrogate microbial communities from a pilot-scale restored wetland in the Sacramento-San Joaquin Delta of California, revealing considerable spatial heterogeneity even within this relatively small site. A number of microbial populations and functions showed strong correlations with electron acceptor availability and methane production; some also showed a preference for association with plant roots. Marker gene phylogenies revealed a diversity of major methane-producing and -consuming populations and suggested novel diversity within methanotrophs. Methanogenic archaea were observed in all samples, as were nitrate-, sulfate-, and metal-reducing bacteria, indicating that no single terminal electron acceptor was preferred despite differences in energetic favorability and suggesting spatial microheterogeneity and microniches. Notably, methanogens were negatively correlated with nitrate-, sulfate-, and metal-reducing bacteria and were most abundant at sampling sites with high peat accretion and low electron acceptor availability, where methane production was highest. Wetlands are the largest nonanthropogenic source of atmospheric methane but also a key global carbon reservoir. Characterizing belowground microbial communities that mediate carbon cycling in wetlands is critical to accurately predicting their responses to changes in land management and climate. Here, we studied a restored wetland and revealed substantial spatial heterogeneity in biogeochemistry, methane production, and microbial communities, largely associated with the wetland hydraulic design. We observed patterns in microbial community composition and functions correlated with biogeochemistry and methane production, including diverse microorganisms involved in methane production and consumption. We found that methanogenesis gene abundance is inversely correlated with genes from pathways exploiting other electron acceptors, yet the ubiquitous presence of genes from all these pathways suggests that diverse electron acceptors contribute to the energetic balance of the ecosystem. These investigations represent an important step toward effective management of wetlands to reduce methane flux to the atmosphere and enhance belowground carbon storage.« less

  14. An Evidence-Based Evaluation of the Cumulative Effects of Tidal Freshwater and Estuarine Ecosystem Restoration on Endangered Juvenile Salmon in the Columbia River: Final Report

    SciTech Connect (OSTI)

    Diefenderfer, Heida L.; Johnson, Gary E.; Thom, Ronald M.; Borde, Amy B.; Woodley, Christa M.; Weitkamp, Laurie A.; Buenau, Kate E.; Kropp, Roy K.

    2013-12-01

    The listing of 13 salmon and steelhead stocks in the Columbia River basin (hereafter collectively referred to as “salmon”) under the Endangered Species Act of 1973, as amended, has stimulated tidal wetland restoration in the lower 235 kilometers of the Columbia River and estuary for juvenile salmon habitat functions. The purpose of the research reported herein was to evaluate the effect on listed salmon of the restoration effort currently being conducted under the auspices of the federal Columbia Estuary Ecosystem Restoration Program (CEERP). Linking changes in the quality and landscape pattern of tidal wetlands in the lower Columbia River and estuary (LCRE) to salmon recovery is a complex problem because of the characteristics of the ecosystem, the salmon, the restoration actions, and available sampling technologies. Therefore, we designed an evidence-based approach to develop, synthesize, and evaluate information to determine early-stage (~10 years) outcomes of the CEERP. We developed an ecosystem conceptual model and from that, a primary hypothesis that habitat restoration activities in the LCRE have a cumulative beneficial effect on juvenile salmon. There are two necessary conditions of the hypothesis: • habitat-based indicators of ecosystem controlling factors, processes, and structures show positive effects from restoration actions, and • fish-based indicators of ecosystem processes and functions show positive effects from restoration actions and habitats undergoing restoration. Our evidence-based approach to evaluate the primary hypothesis incorporated seven lines of evidence, most of which are drawn from the LCRE. The lines of evidence are spatial and temporal synergies, cumulative net ecosystem improvement, estuary-wide meta-analysis, offsite benefits to juvenile salmon, landscape condition evaluation, and evidence-based scoring of global literature. The general methods we used to develop information for the lines of evidence included field measurements, data analyses, modeling, meta-analysis, and reanalysis of previously collected data sets. We identified a set of 12 ancillary hypotheses regarding habitat and salmon response. Each ancillary hypothesis states that the response metric will trend toward conditions at relatively undisturbed reference sites. We synthesized the evidence for and against the two necessary conditions by using eleven causal criteria: strength, consistency, specificity, temporality, biological gradient, plausibility, coherence, experiment, analogy, complete exposure pathway, and predictive performance. Our final evaluation included cumulative effects assessment because restoration is occurring at multiple sites and the collective effect is important to salmon recovery. We concluded that all five lines of evidence from the LCRE indicated positive habitat-based and fish-based responses to the restoration performed under the CEERP, although tide gate replacements on small sloughs were an exception. Our analyses suggested that hydrologic reconnections restore access for fish to move into a site to find prey produced there. Reconnections also restore the potential for the flux of prey from the site to the main stem river, where our data show that they are consumed by salmon. We infer that LCRE ecosystem restoration supports increased juvenile salmon growth and enhanced fitness (condition), thereby potentially improving survival rates during the early ocean stage.

  15. Wetland treatment of oil and gas well waste waters. Final report

    SciTech Connect (OSTI)

    Kadlec, R.; Srinivasan, K.

    1995-08-01

    Constructed wetlands are small on-site systems that possess three of the most desirable components of an industrial waste water treatment scheme: low cost, low maintenance and upset resistance. The main objective of the present study is to extend the knowledge base of wetland treatment systems to include processes and substances of particular importance to small, on-site systems receiving oil and gas well wastewaters. A list of the most relevant and comprehensive publications on the design of wetlands for water quality improvement was compiled and critically reviewed. Based on our literature search and conversations with researchers in the private sector, toxic organics such as Phenolics and b-naphthoic acid, (NA), and metals such as CU(II) and CR(VI) were selected as target adsorbates. A total of 90 lysimeters equivalent to a laboratory-scale wetland were designed and built to monitor the uptake and transformation of toxic organics and the immobilization of metal ions. Studies on the uptake of toxic organics such as phenol and b-naphthoic acid (NA) and heavy metals such as Cu(II) and Cr(VI), the latter two singly or as non-stoichiometric mixtures by laboratory-type wetlands (LWs) were conducted. These LWs were designed and built during the first year of this study. A road map and guidelines for a field-scale implementation of a wetland system for the treatment of oil and gas wastewaters have been suggested. Two types of wetlands, surface flow (SF) and sub surface flow (SSF), have been considered, and the relative merits of each configuration have been reviewed.

  16. Analysis of environmental constraints on expanding reserves in current and future reservoirs in wetlands. Final report

    SciTech Connect (OSTI)

    Harder, B.J.

    1995-03-01

    Louisiana wetlands require careful management to allow exploitation of non-renewable resources without destroying renewable resources. Current regulatory requirements have been moderately successful in meeting this goal by restricting development in wetland habitats. Continuing public emphasis on reducing environmental impacts of resource development is causing regulators to reassess their regulations and operators to rethink their compliance strategies. We examined the regulatory system and found that reducing the number of applications required by going to a single application process and having a coherent map of the steps required for operations in wetland areas would reduce regulatory burdens. Incremental changes can be made to regulations to allow one agency to be the lead for wetland permitting at minimal cost to operators. Operators need cost effective means of access that will reduce environmental impacts, decrease permitting time, and limit future liability. Regulators and industry must partner to develop incentive based regulations that can provide significant environmental impact reduction for minimal economic cost. In addition regulators need forecasts of future E&P trends to estimate the impact of future regulations. To determine future activity we attempted to survey potential operators when this approach was unsuccessful we created two econometric models of north and south Louisiana relating drilling activity, success ratio, and price to predict future wetland activity. Results of the econometric models indicate that environmental regulations have a small but statistically significant effect on drilling operations in wetland areas of Louisiana. We examined current wetland practices and evaluated those practices comparing environmental versus economic costs and created a method for ranking the practices.

  17. Human dimensions perspectives on the impacts of coastal zone marine renewable energy

    E-Print Network [OSTI]

    Pomeroy, Caroline; Conway, Flaxen; Hall-Arber, Madeleine

    2013-01-01

    coastal zone marine renewable energy generation. REFERENCESOuter Continental Shelf Renewable Energy Space-Use ConflictsOF COASTAL ZONE MARINE RENEWABLE ENERGY Caroline Pomeroy,

  18. ENERGY IN THE PACIFIC COASTAL ZONE DOES D.O.E. HAVE A ROLE?

    E-Print Network [OSTI]

    Ritschard, Ronald L.

    2013-01-01

    sting Regional Energy Supply Issues • Zone . • . • . ision-coastal zone, planned energy supply developments also areforecasts regional energy supply dependence on the coastal

  19. Human dimensions perspectives on the impacts of coastal zone marine renewable energy

    E-Print Network [OSTI]

    Pomeroy, Caroline; Conway, Flaxen; Hall-Arber, Madeleine

    2013-01-01

    coastal zone marine renewable energy generation. REFERENCESOF COASTAL ZONE MARINE RENEWABLE ENERGY Caroline Pomeroy,and implementing marine renewable energy (MRE) development

  20. Wetland Flow and Salinity Budgets and Elements of a Decision Support System toward Implementation of Real-Time Seasonal Wetland Salinity Management

    SciTech Connect (OSTI)

    Quinn, N.W.T.; Ortega, R.; Rahilly, P.; Johnson, C.B.

    2011-12-17

    The project has provided science-based tools for the long-term management of salinity in drainage discharges from wetlands to the San Joaquin River. The results of the project are being used to develop best management practices (BMP) and a decision support system to assist wetland managers adjust the timing of salt loads delivered to the San Joaquin River during spring drawdown. Adaptive drainage management scheduling has the potential to improve environmental compliance with salinity objectives in the Lower San Joaquin River by reducing the frequency of violation of Vernalis salinity standards, especially in dry and critically dry years. The paired approach to project implementation whereby adaptively managed and traditional practices were monitored in a side-by-side fashion has provided a quantitative measure of the impacts of the project on the timing of salt loading to the San Joaquin River. The most significant accomplishments of the project has been the technology transfer to wetland biologists, ditch tenders and water managers within the Grasslands Ecological Area. This “learning by doing” has build local community capacity within the Grassland Water District and California Department of Fish and Game providing these institutions with new capability to assess and effectively manage salinity within their wetlands while simultaneously providing benefits to salinity management of the San Joaquin River.

  1. General Relativistic Hydrodynamic Simulation of Accretion Flow from a Stellar Tidal Disruption

    E-Print Network [OSTI]

    Shiokawa, Hotaka; Cheng, Roseanne M; Piran, Tsvi; Noble, Scott C

    2015-01-01

    We study how the matter dispersed when a supermassive black hole tidally disrupts a star joins an accretion flow. Combining a relativistic hydrodynamic simulation of the stellar disruption with a relativistic hydrodynamics simulation of the tidal debris motion, we track such a system until ~80% of the stellar mass bound to the black hole has settled into an accretion flow. Shocks near the stellar pericenter and also near the apocenter of the most tightly-bound debris dissipate orbital energy, but only enough to make the characteristic radius comparable to the semi-major axis of the most-bound material, not the tidal radius as previously thought. The outer shocks are caused by post-Newtonian effects, both on the stellar orbit during its disruption and on the tidal forces. Accumulation of mass into the accretion flow is non-monotonic and slow, requiring ~3--10x the orbital period of the most tightly-bound tidal streams, while the inflow time for most of the mass may be comparable to or longer than the mass accu...

  2. Microclimate Corrosion Effects in Coastal Environments

    SciTech Connect (OSTI)

    Holcomb, G.R.; Covino, B.S. Jr.; Bullard, S.J.; Cramer, S.D.

    1996-03-24

    The Albany Research Center is conducting atmospheric corrosion research in coastal environments to improve the performance of materials in the Nation's infrastructure. The corrosion of bare metals, and of painted, thermal-sprayed, and galvanized steels are presented for one-year exposures at sites located on bridges and utility poles along the Oregon coast. The effects of microclimates (for example distance from the ocean, high wind zones, and salt-fog prone regions) are examined in conjunction with sample orientation and sheltered/unsheltered comparisons. An atmospheric corrosion model examines the growth and dissolution of corrosion product layers to arrive at a steady-state thickness and corrosion rate.

  3. Coastal Electric Coop, Inc | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar EnergyLawler,Coal TechnologiesClio Power Ltd JumpCoastal Electric Coop, Inc

  4. Coastal Energy Ltd | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar EnergyLawler,Coal TechnologiesClio Power Ltd JumpCoastal Electric Coop,

  5. CoastalXethanol LLC | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar EnergyLawler,Coal TechnologiesClio Power Ltd JumpCoastal Electric

  6. Coastal Zone Management Act | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTIONRobertsdale, Alabama (Utility Company) JumpIowa: Energy ResourcesCreek,Coastal Zone Management Act

  7. Coastal Barrier Resources Act | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButtePower Ventures Jump to: navigation, searchClover Hill HighPowerCoastal Barrier

  8. Coastal Energy (CCAP) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButtePower Ventures Jump to: navigation, searchClover Hill HighPowerCoastal

  9. Coastal Harbors Modeling Facility | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButtePower Ventures Jump to: navigation, searchClover Hill HighPowerCoastalHarbors

  10. INTRODUCTION Coastal ecosystems have been exposed to serious pollution for

    E-Print Network [OSTI]

    Alvarez, Nadir

    4010 INTRODUCTION Coastal ecosystems have been exposed to serious pollution for several decades because of increased human activity. Modern agriculture is a major contributor to coastal pollution levels of pollution and potentially harming marine organisms (Banerjee et al., 1996). Some organisms

  11. TOOLS AND METHODS FOR STUDIES IN COASTAL ECOLOGY

    E-Print Network [OSTI]

    Sealey, Kathleen Sullivan

    TOOLS AND METHODS FOR STUDIES IN COASTAL ECOLOGY OF THE BAHAMAS Version 1.2. April 2006 #12;TOOLS Sealey, K, K. Semon, N. Cushion, E.Wright, C. Kaplan, and B. Carpenter. 2006. Tools and Methods for Coastal Ecological Studies of The Bahamas. University of Miami, Coral Gables, Fl. 33124. 111 pp. #12;TOOLS

  12. Toward an uncertainty budget for a coastal ocean model

    E-Print Network [OSTI]

    Kurapov, Alexander

    budget for a coastal ocean model in a wind-forced regime are made, based on numerical simulations with knowledge only of the wind forcing, and no ocean data, for wind fields with these estimated errors it are of increasing interest. For the wind-forced Oregon coastal ocean regime, Kim et al. (2009) recently examined

  13. WIND SPEED VARIABILITY AND ADAPTATION STRATEGIES IN COASTAL AREAS

    E-Print Network [OSTI]

    Kohfeld, Karen

    WIND SPEED VARIABILITY AND ADAPTATION STRATEGIES IN COASTAL AREAS OF THE PACIFIC NORTHWEST of Thesis: Wind Speed Variability and Adaptation Strategies in Coastal Areas of the Pacific Northwest/Approved: ___________________________________________ #12;iii ABSTRACT Overall, previous wind speed studies in the Pacific Northwest (PNW) present

  14. South Carolina Coastal Erosion Study Myrtle Beach Nearshore Experiment

    E-Print Network [OSTI]

    Voulgaris, George

    South Carolina Coastal Erosion Study Myrtle Beach Nearshore Experiment Dec. 10 to Dec. 15, 2003 Savannah Campus Savannah, Ga. Technical Report University of South Carolina CPSD Technical Report: CPSD/04 with the collection of offshore wave and current data as part of the U.S. Geological Survey South Carolina Coastal

  15. Protection of Coastal Infrastructure under Rising Flood Risk

    E-Print Network [OSTI]

    Protection of Coastal Infrastructure under Rising Flood Risk Megan J. Lickley, Ning Lin and Henry D://globalchange.mit.edu/ Printed on recycled paper #12;Protection of Coastal Infrastructure under Rising Flood Risk Megan J to an increasing risk of flooding. We study the combined impacts of anticipated sea level rise, hurricane activity

  16. Research Note Effects of Coastal Lighting on Foraging Behavior

    E-Print Network [OSTI]

    Branch, Lyn C.

    , particularly in coastal systems. Light pollution alters the behavior of sea turtles during nesting; therefore light affects the behavior of terrestrial species in coastal areas and that light pollution deserves, light pollution, Peromyscus polionotus leucocephalus, Santa Rosa beach mice Efectos del Alumbrado

  17. Viability, Development, and Reliability Assessment of Coupled Coastal Forecasting Systems 

    E-Print Network [OSTI]

    Singhal, Gaurav

    2012-10-19

    Real-time wave forecasts are critical to a variety of coastal and offshore opera- tions. NOAA’s global wave forecasts, at present, do not extend into many coastal regions of interest. Even after more than two decades of the historical Exxon Valdez...

  18. Walton County Coastal Storm Damage Reduction Project Walton County, FL

    E-Print Network [OSTI]

    US Army Corps of Engineers

    to reduce coastal storm damages by constructing berms and dunes along 18.8 miles of Walton County shoreline;vegetation and replacement of dune walkover structures as required. Material for the berm and duneWalton County Coastal Storm Damage Reduction Project Walton County, FL 13 December 2012 ABSTRACT

  19. MANAGEMENT OF GROUNDWATER IN SALT WATER INGRESS COASTAL AQUIFERS

    E-Print Network [OSTI]

    Kumar, C.P.

    MANAGEMENT OF GROUNDWATER IN SALT WATER INGRESS COASTAL AQUIFERS C. P. Kumar Scientist `E1 dealing with exploitation, restoration and management of fresh groundwater in coastal aquifers, the key is disturbed by groundwater withdrawals and other human activities that lower groundwater levels, reduce fresh

  20. Policy: HREO-107 Equal Employment Opportunity Coastal Carolina University

    E-Print Network [OSTI]

    Hutchens, John

    Policy: HREO- 107 Equal Employment Opportunity Coastal Carolina University Reviewed/Revised: March 2010, August 2011, October 2013 Page 1 of 6 NOTE: THIS POLICY, LIKE ALL OTHER COASTAL CAROLINA UNIVERSITY POLICIES, IS NOT A CONTRACT OF EMPLOYMENT AND SHOULD NOT BE RELIED UPON AS SUCH. THIS POLICY MAY

  1. Oil, Development, and the Environment: Coastal Brazil at a Crossroads

    E-Print Network [OSTI]

    New Hampshire, University of

    ://www.petrobras.com/pt/energia-e-tecnologia/ #12;(E&P 2011) (BP 2013) *Brazil is 8th largest energy consumer and 10th largest producer (EIA 2012Oil, Development, and the Environment: Coastal Brazil at a Crossroads Dr. Tom Safford ­ UNH - Dept #12;Overview Background on coastal development and the environment in Brazil Global and local

  2. WETCHIMP-WSL: Intercomparison of wetland methane emissions models over West Siberia

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Bohn, T. J.; Melton, J. R.; Ito, A.; Kleinen, T.; Spahni, R.; Stocker, B. D.; Zhang, B.; Zhu, X.; Schroeder, R.; Glagolev, M. V.; et al

    2015-06-03

    Wetlands are the world's largest natural source of methane, a powerful greenhouse gas. The strong sensitivity of methane emissions to environmental factors such as soil temperature and moisture has led to concerns about potential positive feedbacks to climate change. This risk is particularly relevant at high latitudes, which have experienced pronounced warming and where thawing permafrost could potentially liberate large amounts of labile carbon over the next 100 years. However, global models disagree as to the magnitude and spatial distribution of emissions, due to uncertainties in wetland area and emissions per unit area and a scarcity of in situ observations.more »Recent intensive field campaigns across the West Siberian Lowland (WSL) make this an ideal region over which to assess the performance of large-scale process-based wetland models in a high-latitude environment. Here we present the results of a follow-up to the Wetland and Wetland CH4 Intercomparison of Models Project (WETCHIMP), focused on the West Siberian Lowland (WETCHIMP-WSL). We assessed 21 models and 5 inversions over this domain in terms of total CH4 emissions, simulated wetland areas, and CH4 fluxes per unit wetland area and compared these results to an intensive in situ CH4 flux data set, several wetland maps, and two satellite surface water products. We found that (a) despite the large scatter of individual estimates, 12-year mean estimates of annual total emissions over the WSL from forward models (5.34 ± 0.54 Tg CH4 yr?¹), inversions (6.06 ± 1.22 Tg CH4 yr?¹), and in situ observations (3.91 ± 1.29 Tg CH4 yr?¹) largely agreed; (b) forward models using surface water products alone to estimate wetland areas suffered from severe biases in CH4 emissions; (c) the interannual time series of models that lacked either soil thermal physics appropriate to the high latitudes or realistic emissions from unsaturated peatlands tended to be dominated by a single environmental driver (inundation or air temperature), unlike those of inversions and more sophisticated forward models; (d) differences in biogeochemical schemes across models had relatively smaller influence over performance; and (e) multiyear or multidecade observational records are crucial for evaluating models' responses to long-term climate change.« less

  3. WETCHIMP-WSL: Intercomparison of wetland methane emissions models over West Siberia

    SciTech Connect (OSTI)

    Bohn, T. J.; Melton, J. R.; Ito, A.; Kleinen, T.; Spahni, R.; Stocker, B. D.; Zhang, B.; Zhu, X.; Schroeder, R.; Glagolev, M. V.; Maksyutov, S.; Brovkin, V.; Chen, G.; Denisov, S. N.; Eliseev, A. V.; Gallego-Sala, A.; McDonald, K. C.; Rawlins, M. A.; Riley, W. J.; Subin, Z. M.; Tian, H.; Zhuang, Q.; Kaplan, J. O.

    2015-06-03

    Wetlands are the world's largest natural source of methane, a powerful greenhouse gas. The strong sensitivity of methane emissions to environmental factors such as soil temperature and moisture has led to concerns about potential positive feedbacks to climate change. This risk is particularly relevant at high latitudes, which have experienced pronounced warming and where thawing permafrost could potentially liberate large amounts of labile carbon over the next 100 years. However, global models disagree as to the magnitude and spatial distribution of emissions, due to uncertainties in wetland area and emissions per unit area and a scarcity of in situ observations. Recent intensive field campaigns across the West Siberian Lowland (WSL) make this an ideal region over which to assess the performance of large-scale process-based wetland models in a high-latitude environment. Here we present the results of a follow-up to the Wetland and Wetland CH4 Intercomparison of Models Project (WETCHIMP), focused on the West Siberian Lowland (WETCHIMP-WSL). We assessed 21 models and 5 inversions over this domain in terms of total CH4 emissions, simulated wetland areas, and CH4 fluxes per unit wetland area and compared these results to an intensive in situ CH4 flux data set, several wetland maps, and two satellite surface water products. We found that (a) despite the large scatter of individual estimates, 12-year mean estimates of annual total emissions over the WSL from forward models (5.34 ± 0.54 Tg CH4 yr?¹), inversions (6.06 ± 1.22 Tg CH4 yr?¹), and in situ observations (3.91 ± 1.29 Tg CH4 yr?¹) largely agreed; (b) forward models using surface water products alone to estimate wetland areas suffered from severe biases in CH4 emissions; (c) the interannual time series of models that lacked either soil thermal physics appropriate to the high latitudes or realistic emissions from unsaturated peatlands tended to be dominated by a single environmental driver (inundation or air temperature), unlike those of inversions and more sophisticated forward models; (d) differences in biogeochemical schemes across models had relatively smaller influence over performance; and (e) multiyear or multidecade observational records are crucial for evaluating models' responses to long-term climate change.

  4. Spectroscopic evidence of uranium immobilization in acidic wetlands by natural organic matter and plant roots

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Li, Dien; Kaplan, Daniel I.; Chang, Hyun-Shik; Seaman, John C.; Jaffé, Peter R.; Koster van Groos, Paul; Scheckel, Kirk G.; Segre, Carlo U.; Chen, Ning; Jiang, De-Tong; et al

    2015-03-03

    Biogeochemistry of uranium in wetlands plays important roles in U immobilization in storage ponds of U mining and processing facilities but has not been well understood. The objective of this work was to study molecular mechanisms responsible for high U retention by Savannah River Site (SRS) wetland sediments under varying redox and acidic (pH = 2.6–5.8) conditions using U L?-edge X-ray absorption spectroscopy. Uranium in the SRS wetland sediments existed primarily as U(VI) bonded as a bidentate to carboxylic sites (U–C bond distance at ~2.88 Å), rather than phenolic or other sites of natural organic matter (NOM). In microcosms simulatingmore »the SRS wetland processes, U immobilization on roots was two orders of magnitude higher than on the adjacent brown or more distant white sands in which U was U(VI). Uranium on the roots were both U(IV) and U(VI), which were bonded as a bidentate to carbon, but the U(VI) may also form a U phosphate mineral. After 140 days of air exposure, all U(IV) was re-oxidized to U(VI) but remained as a bidentate bonding to carbon. This study demonstrated NOM and plant roots can highly immobilize U(VI) in the SRS acidic sediments, which has significant implication for the long-term stewardship of U-contaminated wetlands.« less

  5. FULL-SCALE TREATMENT WETLANDS FOR METAL REMOVAL FROM INDUSTRIAL WASTEWATER

    SciTech Connect (OSTI)

    Nelson, E; John Gladden, J

    2007-03-22

    The A-01 NPDES outfall at the Savannah River Site receives process wastewater discharges and stormwater runoff from the Savannah River National Laboratory. Routine monitoring indicated that copper concentrations were regularly higher than discharge permit limit, and water routinely failed toxicity tests. These conditions necessitated treatment of nearly one million gallons of water per day plus storm runoff. Washington Savannah River Company personnel explored options to bring process and runoff waters into compliance with the permit conditions, including source reduction, engineering solutions, and biological solutions. A conceptual design for a constructed wetland treatment system (WTS) was developed and the full-scale system was constructed and began operation in 2000. The overall objective of our research is to better understand the mechanisms of operation of the A-01 WTS in order to provide better input to design of future systems. The system is a vegetated surface flow wetland with a hydraulic retention time of approximately 48 hours. Copper, mercury, and lead removal efficiencies are very high, all in excess of 80% removal from water passing through the wetland system. Zinc removal is 60%, and nickel is generally unaffected. Dissolved organic carbon in the water column is increased by the system and reduces toxicity of the effluent. Concentrations of metals in the A-01 WTS sediments generally decrease with depth and along the flow path through the wetland. Sequential extraction results indicate that most metals are tightly bound to wetland sediments.

  6. 1988 National List of Plant Species that Occur in Wetlands The U.S. Army Corps of Engineers (Corps) as of 2006 has accepted the administrative responsibility for

    E-Print Network [OSTI]

    US Army Corps of Engineers

    1988 National List of Plant Species that Occur in Wetlands The U.S. Army Corps of Engineers (Corps) as of 2006 has accepted the administrative responsibility for the National Wetland Plant List from the U plant lists from their National Wetland Inventory (NWI) web site. The web pages and associated files

  7. Regional Service Planning for the Coastal Bend 

    E-Print Network [OSTI]

    Coastal Bend Council of Governments

    2006-12-01

    -Type text/plain; charset=ISO-8859-1 ?R?E?G?I?O?N?A?L? ?S?E?R?V?I?C?E? ?P?L?A?N?N?I?N?G ?F?O?R? ?T?H?E? ?C?O?A?S?T?A?L? ?B?E?N?D ?R?e?g?i?o?n?a?l? ?P?u?b?l?i?c? ?T?r?a?n?s?p?o?r?t?a?t?i?o?n ?C?o?o?r?d?i?n?a?t?i?o?n? ?S?t?u?d?y ?w...?w?w?.?r?e?g?i?o?n?a?l?s?e?r?v?i?c?e?p?l?a?n?n?i?n?g?.?o?r?g ?D?e?c?e?m?b?e?r? ?1?,? ?2?0?0?6 Regional Service Planning for the Coastal Bend Regional Public Transportation Coordination Study This study was funded by financial grant from the Texas...

  8. Tidal dissipation in a homogeneous spherical body. II. Three examples: Mercury, Io, and Kepler-10 b

    SciTech Connect (OSTI)

    Makarov, Valeri V.; Efroimsky, Michael E-mail: michael.efroimsky@usno.navy.mil

    2014-11-01

    In Efroimsky and Makarov (Paper I), we derived from the first principles a formula for the tidal heating rate in a homogeneous sphere, compared it with the previously used formulae, and noted the differences. Now we present case studies: Mercury, Kepler-10 b, and a triaxial Io. A sharp frequency dependence of k {sub 2}/Q near spin-orbit resonances yields a sharp dependence of k {sub 2}/Q (and, therefore, of tidal heating) upon the spin rate. Thereby physical libration plays a major role in tidal heating of synchronously rotating planets. The magnitude of libration in the spin rate being defined by the planet's triaxiality, the latter becomes a factor determining the dissipation rate. Other parameters equal, a strongly triaxial synchronized body generates more heat than a similar body of a more symmetrical shape. After an initially triaxial object melts and loses its triaxiality, dissipation becomes less intensive; the body can solidify, with the tidal bulge becoming a new figure with triaxiality lower than the original. We derive approximate expressions for the dissipation rate in a Maxwell planet with the Maxwell time longer than the inverse tidal frequency. The expressions derived pertain to the 1:1 and 3:2 resonances and a nonresonant case; so they are applicable to most close-in super-Earths detected. In these planets, the heating outside synchronism is weakly dependent on the eccentricity and obliquity, provided both these parameters's values are moderate. According to our calculation, Kepler-10 b could hardly survive the intensive tidal heating without being synchronized, circularized, and reshaped through a complete or partial melt-down.

  9. Accomplishments and future perspective of coastal ocean observing systems Coastal oceans are the most densely urbanized regions on the

    E-Print Network [OSTI]

    are the most densely urbanized regions on the planet with populations growing at rapid rate. In the near future as communities increasingly rely on the coastal ocean to provide additional sources of energy (wind, waves, oil, our ability to map and forecast the coastal ocean remains low. While certain areas are difficult

  10. The Coastal Ocean Prediction Systems program: Understanding and managing our coastal ocean. Volume 2: Overview and invited papers

    SciTech Connect (OSTI)

    Not Available

    1990-05-15

    This document is a compilation of summaries of papers presented at the Coastal Ocean Prediction Systems workshop. Topics include; marine forecasting, regulatory agencies and regulations, research and application models, research and operational observing, oceanic and atmospheric data assimilation, and coastal physical processes.

  11. The application of PHREEQCi, a geochemical computer program, to aid in the management of a wastewater treatment wetland 

    E-Print Network [OSTI]

    Mitzman, Stephanie

    1999-01-01

    In the past decade, constructed wetlands have become popular for treating coal-generated acid mine drainage and leachate from coal-ash disposal areas. The goal of the wetland manager is to design a system in which the pH is neutralized, toxic metals...

  12. Macroscopic traversable wormholes with zero tidal forces inspired by noncommutative geometry

    E-Print Network [OSTI]

    Peter K. F. Kuhfittig

    2015-01-08

    This paper addresses the following issues: (1) the possible existence of macroscopic traversable wormholes, given a noncommutative-geometry background, and (2) the possibility of allowing zero tidal forces, given a known density. It is shown that whenever the energy density describes a classical wormhole, the resulting solution is incompatible with quantum field theory. If the energy density originates from noncommutative geometry, then zero tidal forces are allowed. Also attributable to the noncommutative geometry is the violation of the null energy condition. The wormhole geometry satisfies the usual requirements, including asymptotic flatness.

  13. Detection of Gravitational Wave Emission by Supermassive Black Hole Binaries Through Tidal Disruption Flares

    E-Print Network [OSTI]

    Hayasaki, Kimitake

    2015-01-01

    Galaxy mergers produce binaries of supermassive black holes, which emit gravitational waves prior to their coalescence. We perform three-dimensional hydrodynamic simulations to study the tidal disruption of stars by such a binary in the final centuries of its life. We find that the gas stream of the stellar debris moves chaotically in the binary potential and forms accretion disks around both black holes. The accretion light curve is modulated over the binary orbital period owing to relativistic beaming. This periodic signal allows to detect the decay of the binary orbit due to gravitational wave emission by observing two tidal disruption events that are separated by more than a decade.

  14. Puget Sound Tidal Energy In-Water Testing and Development Project Final Technical Report

    SciTech Connect (OSTI)

    Craig W. Collar

    2012-11-16

    Tidal energy represents potential for the generation of renewable, emission free, environmentally benign, and cost effective energy from tidal flows. A successful tidal energy demonstration project in Puget Sound, Washington may enable significant commercial development resulting in important benefits for the northwest region and the nation. This project promoted the United States Department of Energy�s Wind and Hydropower Technologies Program�s goals of advancing the commercial viability, cost-competitiveness, and market acceptance of marine hydrokinetic systems. The objective of the Puget Sound Tidal Energy Demonstration Project is to conduct in-water testing and evaluation of tidal energy technology as a first step toward potential construction of a commercial-scale tidal energy power plant. The specific goal of the project phase covered by this award was to conduct all activities necessary to complete engineering design and obtain construction approvals for a pilot demonstration plant in the Admiralty Inlet region of the Puget Sound. Public Utility District No. 1 of Snohomish County (The District) accomplished the objectives of this award through four tasks: Detailed Admiralty Inlet Site Studies, Plant Design and Construction Planning, Environmental and Regulatory Activities, and Management and Reporting. Pre-Installation studies completed under this award provided invaluable data used for site selection, environmental evaluation and permitting, plant design, and construction planning. However, these data gathering efforts are not only important to the Admiralty Inlet pilot project. Lessons learned, in particular environmental data gathering methods, can be applied to future tidal energy projects in the United States and other parts of the world. The District collaborated extensively with project stakeholders to complete the tasks for this award. This included Federal, State, and local government agencies, tribal governments, environmental groups, and others. All required permit and license applications were completed and submitted under this award, including a Final License Application for a pilot hydrokinetic license from the Federal Energy Regulatory Commission. The tasks described above have brought the project through all necessary requirements to construct a tidal pilot project in Admiralty Inlet with the exception of final permit and license approvals, and the selection of a general contractor to perform project construction.

  15. MHK Projects/Homeowner Tidal Power Elec Gen | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource HistoryScenarios Towards 2050 JumpCoos Bay OPTHalf Moon Cove TidalTidal

  16. Aggradation of gravels in tidally influenced fluvial systems: upper Albian (Lower Cretaceous) on the cratonic margin of the North

    E-Print Network [OSTI]

    González, Luis A.

    Aggradation of gravels in tidally influenced fluvial systems: upper Albian (Lower Cretaceous for the required water supply flux. Regardless of temporal scale, gravels were transported during `high-energy at the mouths of the river system, and tidal effects were transmitted at least 200 km inland from

  17. Distribution of Energy Spectra, Reynolds Stresses, Turbulence Production, and Dissipation in a Tidally Driven Bottom Boundary Layer

    E-Print Network [OSTI]

    Distribution of Energy Spectra, Reynolds Stresses, Turbulence Production, and Dissipation in a Tidally Driven Bottom Boundary Layer L. LUZNIK,* R. GURKA,*, W. A. M. NIMMO SMITH,# W. ZHU,* J. KATZ) site] are examined, covering the accelerating and decelerating phases of a single tidal cycle

  18. Factors Determining the Location of the Chlorophyll Maximum and the Fate of Algal Production within the Tidal

    E-Print Network [OSTI]

    Bukaveckas, Paul A.

    that cause the formation of a chlorophyll maximum within the tidal freshwater James River. Phyto- plankton in their dominant mode of hydrodynamics, tidal freshwaters share a number of features in common with rivers of the saline estuary. Their hydrodynamics are dominated by bi- directional flow but are subject to considerable

  19. Surface M2 tidal currents along the North Carolina shelf observed with a high-frequency radar

    E-Print Network [OSTI]

    Miami, University of

    Surface M2 tidal currents along the North Carolina shelf observed with a high-frequency radar measured by a high-frequency (HF) radar. The Ocean Surface Current Radar (OSCR) was deployed at the U. M., and L. K. Shay, Surface M2 tidal currents along the North Carolina shelf observed with a high-frequency

  20. The Cascade of Tidal Energy from Low to High Modes on a Continental Slope SAMUEL M. KELLY* AND JONATHAN D. NASH

    E-Print Network [OSTI]

    The Cascade of Tidal Energy from Low to High Modes on a Continental Slope SAMUEL M. KELLY 25 March 2012) ABSTRACT The linear transfer of tidal energy from large to small scales is quantified. Observed transfer of tidal energy into high-mode internal tides is quantitatively consistent with observed

  1. JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Dissipation at tidal and seismic frequencies in a melt-free,

    E-Print Network [OSTI]

    Nimmo, Francis

    be readily detectable with future seismological observations. 1. Introduction The rate at which tidal energyJOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Dissipation at tidal and seismic of Phobos provides a constraint on the tidal dissipation factor, Q, within Mars. We model viscoelastic

  2. A simple parameterization of turbulent tidal mixing near supercritical topography JODY M. KLYMAK1, SONYA LEGG2, AND ROBERT PINKEL3

    E-Print Network [OSTI]

    Klymak, Jody M.

    MAY 2010 1 A simple parameterization of turbulent tidal mixing near supercritical topography JODY M Jolla CA, 98105, USA (Manuscript received , in final form ) ABSTRACT A simple parameterization for tidal wave modes that have non-rotating phase speeds slower than the tidal advection speed are assumed

  3. Process-Based Coastal Erosion Modeling for Drew Point, North Slope, Alaska

    E-Print Network [OSTI]

    Zhang, Jinlun

    Process-Based Coastal Erosion Modeling for Drew Point, North Slope, Alaska Thomas M. Ravens1, Beaufort Sea, Alaska. This coastal setting has experienced a dramatic increase in erosion since the early, coastal erosion/shoreline change model has been developed for a small coastal segment near Drew Point

  4. Aquatic macroinvertebrate food resources for birds in a Texas coastal marsh 

    E-Print Network [OSTI]

    Sipocz, Andrew Vincent

    1993-01-01

    Wetlands of the San Bernard National Wildlife Refuge (SBNWR) were sampled to investigate environmental factors which influence aquatic macroinvertebrate standing crop and diversity. Sampling occurred monthly between ...

  5. Coastal-zone biogeochemical dynamics under global warming

    SciTech Connect (OSTI)

    Mackenzie, F.T.; Ver, L.M.; Lerman, A.

    2000-03-01

    The coastal zone, consisting of the continental shelves to a depth of 200 meters, including bays, lagoons, estuaries, and near-shore banks, is an environment that is strongly affected by its biogeochemical and physical interactions with reservoirs in the adjacent domains of land, atmosphere, open ocean, and marine sediments. Because the coastal zone is smaller in volume and area coverage relative to the open ocean, it traditionally has been studied as an integral part of the global oceans. In this paper, the authors show by numerical modeling that it is important to consider the coastal zone as an entity separate from the open ocean in any assessment of future Earth-system response under human perturbation. Model analyses for the early part of the 21st century suggest that the coastal zone plays a significant modifying role in the biogeochemical dynamics of the carbon cycle and the nutrient cycles coupled to it. This role is manifested in changes in primary production, storage, and/or export of organic matter, its remineralization, and calcium carbonate precipitation--all of which determine the state of the coastal zone with respect to exchange of CO{sub 2} with the atmosphere. Under a scenario of future reduced or complete cessation of the thermohaline circulation (THC) of the global oceans, coastal waters become an important sink for atmospheric CO{sub 2}, as opposed to the conditions in the past and present, when coastal waters are believed to be a source of CO{sub 2} to the atmosphere. Profound changes in coastal-zone primary productivity underscore the important role of phosphorus as a limiting nutrient. In addition, calculations indicate that the saturation state of coastal waters with respect to carbonate minerals will decline by {approximately}15% by the year 2030. Any future slowdown in the THC of the oceans will increase slightly the rate of decline in saturation state.

  6. Partners for Profit... Coastal Bermudagrass, Fertilizer, and Management. 

    E-Print Network [OSTI]

    Pratt, J. Neal; Lovell, Ashley C.

    1979-01-01

    is expressed to the Tennessee Valley Authority for providing partial funds for printing. J S 111'1 I c.;l~ I 8 -/:);).3 (l a. '"A I JvJ(Y PARTNERS FOR PROFIT ... COASTAL BERMUDAGRASS, FERTILIZER AND MANAGEMENT J. Neal Pratt and Ashley C. Lovell* Coastal... in improved animal performances. L-771 Crop Fertilization on East Texas Soils L-772 L-983 Crop Fertilization on Coast Prairie and Coastal 8end Soils Crop Fertilization on Rolling Plains, Central Prairies and Cross Timber Soils L-1411 Field and Forage...

  7. PHYSIOLOGICAL PERFORMANCE OF INTERTIDAL CORALLINE ALGAE DURING A SIMULATED TIDAL CYCLE1

    E-Print Network [OSTI]

    Martone, Patrick T.

    PHYSIOLOGICAL PERFORMANCE OF INTERTIDAL CORALLINE ALGAE DURING A SIMULATED TIDAL CYCLE1 Rebecca J, Lobban and Harrison 1997, Helmuth and Hofmann 2001). During high tide, intertidal algae are underwater algae may be emerged and exposed to increased light stress, elevated air tem- peratures, and increased

  8. Modeling tidal flow in the Great Bay Estuary, New Hampshire, using a depth averaged

    E-Print Network [OSTI]

    Modeling tidal flow in the Great Bay Estuary, New Hampshire, using a depth averaged flooding, University of New Hampshire, USA. 2 Numerical Methods Lab., Dartmouth College, USA. 3 Ocean Process Analysis Lab., University of New Hampshire, USA. Abstract Current, sea level and bed load transport

  9. Tidal heating of Earth-like exoplanets around M stars: Thermal, magnetic, and orbital evolutions

    E-Print Network [OSTI]

    Driscoll, Peter

    2015-01-01

    The internal thermal and magnetic evolution of rocky exoplanets is critical to their habitability. We focus on the thermal-orbital evolution of Earth-mass planets around low mass M stars whose radiative habitable zone overlaps with the "tidal zone". We develop a thermal-orbital evolution model calibrated to Earth that couples tidal dissipation, with a temperature-dependent Maxwell rheology, to orbital circularization and migration. We illustrate thermal-orbital steady states where surface heat flow is balanced by tidal dissipation and cooling can be stalled for billions of years until circularization occurs. Orbital energy dissipated as tidal heat in the interior drives both inward migration and circularization, with a circularization time that is inversely proportional to the dissipation rate. We identify a peak in the internal dissipation rate as the mantle passes through a visco-elastic state at mantle temperatures near 1800 K. Planets orbiting a 0.1 solar-mass star within $0.07$ AU circularize before 10 G...

  10. EVALUATION OF TIDAL INLETS CHANNEL MIGRATION AND MANAGEMENT PRACTICES IN SOUTHWEST FLORIDA

    E-Print Network [OSTI]

    US Army Corps of Engineers

    484 EVALUATION OF TIDAL INLETS CHANNEL MIGRATION AND MANAGEMENT PRACTICES IN SOUTHWEST FLORIDA are analyzed to understand common factors that contribute to channel migration for inlets with/without jetties depth sufficient for reliable navigation in critical shoaling areas. In addition, ebb shoals have been

  11. Radar interferometry for measuring tidal strains across cracks on David Sandwell,1

    E-Print Network [OSTI]

    Sandwell, David T.

    Radar interferometry for measuring tidal strains across cracks on Europa David Sandwell,1 Paul and the plate has been relatively thin ($2 km) [Carr et al., 1998]. However, the present-day average shell relationships and a variety of morphologic characteristics [Carr et al., 1998; Greenberg et al., 1998]. Simple

  12. TIDAL ENERGY SITE RESOURCE ASSESSMENT: TECHNICAL SPECIFICATIONS, BEST PRACTICES AND CASE STUDIES

    E-Print Network [OSTI]

    Siefert, Chris

    , Wind and Water Power Technologies, Environmental Sciences Division, Oak Ridge National Laboratory, Oak fashion, we can develop tidal energy site classes that map to standard TEC designs, similar to the wind over a representative period of record, to design the structural loading and power capacity of the TEC

  13. Tidal constituent database. West Coast of the United States and Eastern North pacific ocean. Technical note

    SciTech Connect (OSTI)

    NONE

    1995-01-01

    This technical note describes a database of tidal elevation boundary condition information generated in support of the `Long-Term Fate of Dredged Material Disposed in Open Water` research of the Dredging Research Program (DRP), being conducted at the U.S. Army Engineer Waterways Experiment Station. The database, described in detail by Hench and others (1994), allows the user to manually generate time series of tidal elevations or to use a program to access the full database to generate time series of both tidal elevations and currents for any location along the West Coast of the United States and Eastern North Pacific Ocean, extending from Seal Cape on Unimak Island, Alaska, in the North to Punta Parada, Peru, in the South. The land boundary includes the Pacific shorelines of Alaska, Canada, mainland United States, Mexico, Guatemala, El Salvador, Nicaragua, Costa Rica, Panama, Columbia, and Northern Peru. Although the capability to generate these time series was developed to provide input to the Long-Term Fate and Stability Model (LTFATE), the generated time series can be used for any application requiring tidal forcing data.

  14. The record of sea level rise by tidal sand bodies of the English Channel

    SciTech Connect (OSTI)

    Berne, S; Lericolais, G. (Ifremer, Plouzane, (France)); Lafont, F. (Universite d'Orsay (France))

    1990-05-01

    Improvements of very high resolution seismic reflection provide new information about internal structures of modern sand bodies. This allows us to reconstruct their recent history, which is related to the Holocene sea level rise. A major distinction is found between inner shelf sand bodies, dominated by autocyclic processes, and outer shelf sand bodies, where allocyclic processes are invoked to explain the apparent contradiction between internal structures and present-day dynamics. On the inner shelf, evidence of the migration of tidal dunes (sand waves) has been obtained by repeated surveys using accurate positioning systems. Major bounding surfaces are thought to result from the action of tidal current and/or from episodic storms. A rough estimation of the age of these sand bodies can be proposed. On the outer shelf, some dunes of the English Channel exhibit cross-beds indicative of a past net bed-load transport at the opposite of present days dynamics, inherited from different tidal conditions when sea level was between 20 and 40 m lower. Some large tidal sand banks (e.g., the Sark Bank near the Channel Islands) display a more complicated pattern. The upper part of the sand bank is the result of the migration of very large dunes climbing at positive angles, whereas the lower part shows major erosional surfaces, attributed to the action of storms during lower sea levels.

  15. FLORAL AND FAUNAL DIFFERENCES BETWEEN FRAGMENTED AND UNFRAGMENTED BAHAMIAN TIDAL CREEKS

    E-Print Network [OSTI]

    Langerhans, Brian

    Valentine-Rose1,7 , Julia A. Cherry1,2 , J. Jacob Culp1,3 , Kathryn E. Perez1,4 , Jeff B. Pollock1 , D, mangroves, seagrass macroalgal beds, as well as tidal creeks; Dahlgren and Marr 2004), have been identified

  16. Tidally driven ice speed variation at Helheim Glacier, Greenland, observed with terrestrial radar interferometry

    E-Print Network [OSTI]

    Holland, David

    Tidally driven ice speed variation at Helheim Glacier, Greenland, observed with terrestrial radar Space Flight Center, Greenbelt, MD, USA 4 Earth System Science Interdisciplinary Center, University is usually packed with dense ice melange. Helheim Glacier accelerated and retreated between 2000 and 2005

  17. Transformations of galaxies. III. Encounter dynamics and tidal response as functions of galaxy structure

    E-Print Network [OSTI]

    Barnes, Joshua E

    2015-01-01

    Tidal interactions between disc galaxies depend on galaxy structure, but the details of this relationship are incompletely understood. I have constructed a three-parameter grid of bulge/disc/halo models broadly consistent with $\\Lambda$CDM, and simulated an extensive series of encounters using these models. Halo mass and extent strongly influence the dynamics of orbit evolution. In close encounters, the transfer of angular momentum mediated by the dynamical response of massive, extended haloes can reverse the direction of orbital motion of the central galaxies after their first passage. Tidal response is strongly correlated with the ratio $v_\\mathrm{e} / v_\\mathrm{c}$ of escape to circular velocity within the participating discs. Moreover, the same ratio also correlates with the rate at which tidal tails are reaccreted by their galaxies of origin; consequently, merger remnants with `twin tails', such as NGC 7252, may prove hard to reproduce unless $(v_\\mathrm{e} / v_\\mathrm{c})^2 \\lesssim 5.5$. The tidal morp...

  18. TIDAL INTERACTION AS THE ORIGIN OF EARLY-TYPE DWARF GALAXIES IN GROUP ENVIRONMENTS

    SciTech Connect (OSTI)

    Paudel, Sanjaya; Ree, Chang H.

    2014-11-20

    We present a sample of dwarf galaxies that suffer ongoing disruption by the tidal forces of nearby massive galaxies. By analyzing structural and stellar population properties using the archival imaging and spectroscopic data from the Sloan Digital Sky Survey (SDSS), we find that they are likely a ''smoking gun'' example of the formation through tidal stirring of early-type dwarf galaxies (dEs) in the galaxy group environment. The inner cores of these galaxies are fairly intact and the observed light profiles are well fit by the Sérsic functions while the tidally stretched stellar halos are prominent in the outer parts. They are all located within a sky-projected distance of 50 kpc from the centers of the host galaxies and no dwarf galaxies have relative line-of-sight velocities larger than 205 km s{sup –1} to their hosts. We derive the Composite Stellar Population properties of these galaxies by fitting the SDSS optical spectra to a multiple-burst composite stellar population model. We find that these galaxies accumulate a significant fraction of stellar mass within the last 1 Gyr and contain a majority stellar population with an intermediate age of 2 to 4 Gyr. Based on this evidence, we argue that tidal stirring, particularly through the galaxy-galaxy interaction, might have an important role in the formation and evolution of dEs in the group environment where the influence of other gas stripping mechanism might be limited.

  19. Tidal wave in 102Pd: Rotating condensate of up to seven d-bosons

    E-Print Network [OSTI]

    S. Frauendorf; M. A. Caprio; J. Sun

    2012-02-08

    The yrast states of even even vibrational and transitional nuclei are inter- preted as a rotating condensate of interacting d-bosons and the corresponding semi-classical tidal wave concept. A simple experimental manifestation of the anharmonicity caused by the boson interaction is found. The interpretation is substantiated by calculations based on the Collective Model and the Cranking Model.

  20. An Alternative Model for the Tidal Evolution of the Earth-Moon-Sun System

    E-Print Network [OSTI]

    Arbab I. Arbab

    2007-09-12

    We have found that the expansion of the universe has immense consequences on our local systems. We present a model based on cosmic expansion that fits well with observation. The close approach problem inflicting tidal theory is averted in this model. We have shown that the astronomical and geological changes of our local systems are of the order of Hubble constant.

  1. ORNL/TM-2011/419 Field Measurements at River and Tidal

    E-Print Network [OSTI]

    Siefert, Chris

    National Laboratory 3 Northwest National Marine Renewable Energy Center, University of Washington 4 IIHRORNL/TM-2011/419 Field Measurements at River and Tidal Current Sites for Hydrokinetic Energy Reports produced after January 1, 1996, are generally available free via the U.S. Department of Energy

  2. Asymmetric mixing transport: a horizontal transport mechanism for sinking plankton and sediment in tidal flows

    E-Print Network [OSTI]

    Pringle, James "Jamie"

    Asymmetric mixing transport: a horizontal transport mechanism for sinking plankton and sediment in tidal flows James M. Pringle1 and Peter J.S. Franks2 SIO-UCSD, Mail Stop 0218 La Jolla, California 92093-0218 Running Head: Asymmetric Mixing Transport and Plankton 1 jmpringle@ucsd.edu 2 pfranks@ucsd.edu 1 #12

  3. Acoustic Monitoring of Beluga Whale Interactions with Cook Inlet Tidal Energy Project

    SciTech Connect (OSTI)

    Worthington, Monty

    2014-02-05

    Cook Inlet, Alaska is home to some of the greatest tidal energy resources in the U.S., as well as an endangered population of beluga whales (Delphinapterus leucas). Successfully permitting and operating a tidal power project in Cook Inlet requires a biological assessment of the potential and realized effects of the physical presence and sound footprint of tidal turbines on the distribution, relative abundance, and behavior of Cook Inlet beluga whales. ORPC Alaska, working with the Project Team—LGL Alaska Research Associates, University of Alaska Anchorage, TerraSond, and Greeneridge Science—undertook the following U.S. Department of Energy (DOE) study to characterize beluga whales in Cook Inlet – Acoustic Monitoring of Beluga Whale Interactions with the Cook Inlet Tidal Energy Project (Project). ORPC Alaska, LLC, is a wholly-owned subsidiary of Ocean Renewable Power Company, LLC, (collectively, ORPC). ORPC is a global leader in the development of hydrokinetic power systems and eco-conscious projects that harness the power of ocean and river currents to create clean, predictable renewable energy. ORPC is developing a tidal energy demonstration project in Cook Inlet at East Foreland where ORPC has a Federal Energy Regulatory Commission (FERC) preliminary permit (P-13821). The Project collected baseline data to characterize pre-deployment patterns of marine mammal distribution, relative abundance, and behavior in ORPC’s proposed deployment area at East Foreland. ORPC also completed work near Fire Island where ORPC held a FERC preliminary permit (P-12679) until March 6, 2013. Passive hydroacoustic devices (previously utilized with bowhead whales in the Beaufort Sea) were adapted for study of beluga whales to determine the relative abundance of beluga whale vocalizations within the proposed deployment areas. Hydroacoustic data collected during the Project were used to characterize the ambient acoustic environment of the project site pre-deployment to inform the FERC pilot project process. The Project compared results obtained from this method to results obtained from other passive hydrophone technologies and to visual observation techniques performed simultaneously. This Final Report makes recommendations on the best practice for future data collection, for ORPC’s work in Cook Inlet specifically, and for tidal power projects in general. This Project developed a marine mammal study design and compared technologies for hydroacoustic and visual data collection with potential for broad application to future tidal and hydrokinetic projects in other geographic areas. The data collected for this Project will support the environmental assessment of future Cook Inlet tidal energy projects, including ORPC’s East Foreland Tidal Energy Project and any tidal energy developments at Fire Island. The Project’s rigorous assessment of technology and methodologies will be invaluable to the hydrokinetic industry for developing projects in an environmentally sound and sustainable way for areas with high marine mammal activity or endangered populations. By combining several different sampling methods this Project will also contribute to the future preparation of a comprehensive biological assessment of ORPC’s projects in Cook Inlet.

  4. General Relativistic Hydrodynamic Simulation of Accretion Flow from a Stellar Tidal Disruption

    E-Print Network [OSTI]

    Hotaka Shiokawa; Julian H. Krolik; Roseanne M. Cheng; Tsvi Piran; Scott C. Noble

    2015-01-18

    We study how the matter dispersed when a supermassive black hole tidally disrupts a star joins an accretion flow. Combining a relativistic hydrodynamic simulation of the stellar disruption with a relativistic hydrodynamics simulation of the tidal debris motion, we track such a system until ~80% of the stellar mass bound to the black hole has settled into an accretion flow. Shocks near the stellar pericenter and also near the apocenter of the most tightly-bound debris dissipate orbital energy, but only enough to make the characteristic radius comparable to the semi-major axis of the most-bound material, not the tidal radius as previously thought. The outer shocks are caused by post-Newtonian effects, both on the stellar orbit during its disruption and on the tidal forces. Accumulation of mass into the accretion flow is non-monotonic and slow, requiring ~3--10x the orbital period of the most tightly-bound tidal streams, while the inflow time for most of the mass may be comparable to or longer than the mass accumulation time. Deflection by shocks does, however, remove enough angular momentum and energy from some mass for it to move inward even before most of the mass is accumulated into the accretion flow. Although the accretion rate rises sharply and then decays roughly as a power-law, its maximum is ~0.1x the previous expectation, and the duration of the peak is ~5x longer than previously predicted. The geometric mean of the black hole mass and stellar mass inferred from a measured event timescale is therefore ~0.2x the value given by classical theory.

  5. LAKE MICHIGAN'S TRIBUTARY AND NEARSHORE FISH HABITATS

    E-Print Network [OSTI]

    (Catostomidae). Coastal wetland habitats support spawning and early life stages of basses (Centrarchidae

  6. COASTAL OCEANOGRAPHY USING A SMALL AUV , Manhar R Dhanak*(1)

    E-Print Network [OSTI]

    Dhanak, Manhar R.

    1 COASTAL OCEANOGRAPHY USING A SMALL AUV Edgar An (1) , Manhar R Dhanak*(1) , Lynn K Shay (2, Boca Raton, Florida, 33431 (2) Division of Meteorology and Physical Oceanography RSMAS, University

  7. Seawater circulation in coastal aquifers : processes and impacts

    E-Print Network [OSTI]

    Karam, Hanan Nadim

    2012-01-01

    This thesis explores the subterranean domain of chemical cycling in coastal oceans abutting permeable aquifers, where transport through sediments is dominated by advection, rather than diffusion. We investigate the mechanisms ...

  8. MULTIVARIATE VISUALIZATION OF DATA QUALITY ELEMENTS FOR COASTAL ZONE MONITORING

    E-Print Network [OSTI]

    MULTIVARIATE VISUALIZATION OF DATA QUALITY ELEMENTS FOR COASTAL ZONE MONITORING D. E. van de Vlag for illustrating quantitative values of quality elements using multivariate visualization techniques. Quality, temporal accuracy and completeness. By combining multivariate visualization with the technique of multiple

  9. Phosphorus fertilization of alfalfa on Coastal Plain soils 

    E-Print Network [OSTI]

    Beedy, Tracy Lyn

    2000-01-01

    Grazing tolerant varieties of alfalfa (Medicago sativa L.) are being introduced to improve the quality of pastures in the southern Coastal Plain. 'Alfagraze' alfalfa was planted on eight soils near Overton, Texas to determine the P requirement...

  10. Communicating Coastal Risk Analysis in an Age of Climate Change

    E-Print Network [OSTI]

    of the ocean and in relatively low-lying, flat coastal regions [1], and the land, people, and supporting by allowing further inland penetration of surge and waves. Additionally, the actual inundation caused

  11. Potential Oil Production from the Coastal Plain of the Arctic...

    Annual Energy Outlook [U.S. Energy Information Administration (EIA)]

    of the geology of the Coastal Plain is based on outcrops and geophysical data from seismic surveys of the area. The extrapolation of known geology and information from wells...

  12. Septic Systems in the Coastal Environment: Multiple Water Quality

    E-Print Network [OSTI]

    Mallin, Michael

    ....................................................... 82 4.2 Septic System Pollutants and Treatment Processes4 Septic Systems in the Coastal Environment: Multiple Water Quality Problems in Many Areas Michael .................................................................. 82 4.3 Septic Systems and Fecal Microbial Pollution

  13. DOE-Supported Project Demonstrates Benefits of Constructed Wetlands to Treat Non-Traditional Water Sources

    Broader source: Energy.gov [DOE]

    In a pilot-scale test supported by the U.S. Department of Energy Office of Fossil Energy, Clemson University researchers have shown that manmade or "constructed" wetlands can be used to treat non-traditional water sources which could then be used in power plants or for other purposes.

  14. 7th INTECOL International Wetlands Conference Utrecht 2004, 25-30 July

    E-Print Network [OSTI]

    Brix, Hans

    of water and therefore comply with all treatment standards. Water is removed through evaporation from wetlands for on-site treatment of wastewater Hans Brix Aarhus University, Institute of Biological Sciences infiltration, but at many sites soil infiltration is not possible. The Danish EPA has produced guidelines

  15. STUDY QUESTIONS FOR LECTURE EXAM WFS 340: Wetlands Ecology and Management

    E-Print Network [OSTI]

    Gray, Matthew

    the 5 USACE plant classifications, which are related to flood tolerance. 4) Know which USACE plant plant fibers. 7) Know percent composition of organic C required to be classified as an organic soil with respect to growing season flooding duration. Also, know which zones qualify as "wetland hydrology." 13

  16. Evaluation of two commercial bioaugmentation products for enhanced removal of petroleum from a wetland 

    E-Print Network [OSTI]

    Simon, Mark Allen

    1998-01-01

    as an oil spill response tool. The research is conducted at a facility established following an accidental oil spill on the San Jacinto River in October 1994. Previous research evaluated the intrinsic repudiation of petroleum in a wetland, as well as the use...

  17. Linkage of MIKE SHE to Wetland-DNDC for carbon budgeting and anaerobic biogeochemistry

    E-Print Network [OSTI]

    . Introduction Increasing emissions of carbon dioxide, methane, and other greenhouse gases (GHGs) are believed 2004 Key words: Biogeochemical modeling, Carbon dynamics, Forest wetland, Greenhouse gases emission and forest management practices on GHGs emissions and carbon dynamics to test the capabilities of the models

  18. New Orleans: Loss of wetlands opens floodgates to disaster By David Usborne Independent 01 September 2005

    E-Print Network [OSTI]

    Brown, Gregory G.

    such as the one generated by Katrina. But, according to the US Geological Survey, Louisiana has lost 1,900 square Louisiana's coast. "With that loss of wetlands ... we had to build hurricane protection. I think a longer hurricanes and disastrous floods that the levees and dams have been built. There are thousands of miles

  19. Drought-induced mosquito outbreaks in wetlands Jonathan M. Chase1

    E-Print Network [OSTI]

    are vectors for several important human diseases, such as malaria, dengue fever, yellow fever and West NileREPORT Drought-induced mosquito outbreaks in wetlands Jonathan M. Chase1 * and Tiffany M. Knight2 1 Mosquitoes are not only a nuisance, but also vector many important human and animal diseases. Here

  20. WETLAND USE AND FEEDING BY LESSER SCAUP DURING SPRING MIGRATION ACROSS THE UPPER MIDWEST, USA

    E-Print Network [OSTI]

    Afton, Alan D.

    bordering the Gulf of Mexico and migrates along the Mississippi River valley and through the upper MidwestWETLAND USE AND FEEDING BY LESSER SCAUP DURING SPRING MIGRATION ACROSS THE UPPER MIDWEST, USA reserves of lesser scaup (Aythya affinis; hereafter scaup) during spring migration in the upper Midwest may

  1. Evaluation of the nutrient removal efficiency of a constructed wetland system 

    E-Print Network [OSTI]

    Hart, Kimberly Ann

    2006-10-30

    In north central Texas, USA, free-water surface wetlands have been constructed to treat pre-treated wastewater effluent from the Trinity River. Water quality and vegetation data from the first two years of operation (June 2003 to May 2005) were used...

  2. Space-based detection of wetlands' surface water level changes from L-band SAR interferometry

    E-Print Network [OSTI]

    Amelung, Falk

    Causeway, Miami, FL 33149-1098, United States b Department of Civil, Architectural and Environmental enables accurate estimation of the wetland InSAR technique, which lies in the range of 5­10 cm, 2006; Dai et al., 2002; Kimura & Yamaguchi, 2000), mining and large-scale geotechnical projects (e

  3. Reducing Agricultural Nitrate Losses in the Embarras River Watershed through Bioreactors, Constructed Wetlands, and Outreach

    E-Print Network [OSTI]

    David, Mark B.

    , Courtney Flint, Lowell Gentry, Robert Hudson: Natural Resources & Environmental Sciences Richard Cooke concentrations and loads for this watershed and have used it for many past studies on water quality, so we have as measure wetland greenhouse gas emissions (N2O, CH4, and CO2) (research objective). 2. Determine

  4. Stormwater BMPs for Trout Waters Coldwater Stream Design Guidance for Stormwater Wetlands,

    E-Print Network [OSTI]

    Hunt, William F.

    Stormwater BMPs for Trout Waters Coldwater Stream Design Guidance for Stormwater Wetlands, Wet that the effects of stormwater runoff and urbanization are detrimental to organisms living in streams and rivers. To reduce these negative impacts, a variety of stormwater best management practices (BMPs) have been

  5. Subsurface Gravel Wetlands for the T t t f St tTreatment of Stormwater

    E-Print Network [OSTI]

    Subsurface Gravel Wetlands for the T t t f St tTreatment of Stormwater ThomasThomas P. Ballestero Puls, University of New Hampshire Stormwater CenterUniversity of New Hampshire Stormwater Center NJASLA://www.unhsc.unh.edu effective stormwater management · Research and development of stormwater treatment systems· Research

  6. Growing season methyl bromide and methyl chloride fluxes at a sub-arctic wetland in Sweden 

    E-Print Network [OSTI]

    Hardacre, Catherine J.; Blei, Emanuel; Heal, Mathew R

    2009-01-01

    Methyl bromide and methyl chloride fluxes were measured at several sites in a sub-arctic wetland near Abisko, Sweden (68°28?N 18°49?E) throughout the 2008 growing season. Averaged over 92 flux measurements the sub-arctic ...

  7. Wetlands of the Fraser Lowland, 1989: An I.nventmy Kathleen Moore

    E-Print Network [OSTI]

    Wetlands of the Fraser Lowland, 1989: An I.nventmy Peggy Ward Kathleen Moore GIS Applications Ron essential GIS support when it was most needed, and for that we are very grateful. Thanks also to Michael Geographic Information System (GIS) as a pilot application of this technology; the use of the methodology

  8. Soil mineral genesis and distribution in a saline lake landscape of the Pantanal Wetland, Brazil

    E-Print Network [OSTI]

    Ahmad, Sajjad

    Soil mineral genesis and distribution in a saline lake landscape of the Pantanal Wetland, Brazil S Geografia, Universidade de São Paulo, São Paulo, Brazil b Soil & Water Sciences Program, Department São Paulo, Piracicaba, Brazil a b s t r a c ta r t i c l e i n f o Article history: Received 20 August

  9. RETENTION AND CHEMICAL SPECIATION OF URANIUM IN A WETLAND ON THE SAVANNAH RIVER SITE

    SciTech Connect (OSTI)

    Li, D.; CHANG, H.: SEAMAN, J.; Jaffe, P.; Groos, P.; Jiang, D.; Chen, N.; Lin, J.; Arthur, Z.; Scheckel, K.; Kaplan, D.

    2013-06-17

    Uranium speciation and retention mechanism onto Savannah River Site (SRS) wetland sediments was studied using batch (ad)sorption experiments, sequential extraction desorption tests and U L{sub 3}-edge X-ray absorption near-edge structure (XANES) spectroscopy of contaminated wetland sediments. U was highly retained by the SRS wetland sediments. In contrast to other similar but much lower natural organic matter (NOM) sediments, significant sorption of U onto the SRS sediments was observed at pH <4 and pH >8. Sequential extraction tests indicated that the U(VI) species were primarily associated with the acid soluble fraction (weak acetic acid extractable) and NOM fraction (Na-pyrophosphate extractable). Uranium L3- edge XANES spectra of the U-retained sediments were nearly identical to that of uranyl acetate. The primary oxidation state of U in these sediments was as U(VI), and there was little evidence that the high sorptive capacity of the sediments could be ascribed to abiotic or biotic reduction to the less soluble U(IV) species. The molecular mechanism responsible for the high U retention in the SRS wetland sediments is likely related to the chemical bonding of U to organic carbon.

  10. CONSTRUCTED FARM WETLANDS (CFWs) FOR REMEDIATION OF FARMYARD RUNOFF: WATER TREATMENT EFFICIENCY, ECOLOGICAL

    E-Print Network [OSTI]

    CONSTRUCTED FARM WETLANDS (CFWs) FOR REMEDIATION OF FARMYARD RUNOFF: WATER TREATMENT EFFICIENCY higher than river water quality targets. Its ecological value is poor due to its high pollution and low, Aberdeen, AB15 8QH, UK E-mail: fabrice.gouriveau@ed.ac.uk Summary: This research evaluates the treatment

  11. Capacity-building: an inquiry into the local coastal program component of coastal zone management in Louisiana 

    E-Print Network [OSTI]

    Norris-Raynbird, Carla

    2007-09-17

    Social research specifically aimed at evaluating the efficacy of coastal zone management programs at the parish (county) level in building local capacities has been meager in academic literatures and absent from Louisiana Department of Natural...

  12. Development of a deterministic and stochastic computer model for phosphorus retention in a surface flow wetland system 

    E-Print Network [OSTI]

    Verma, Rahul

    1999-01-01

    (water, soil, and biomass) and a mass balance for phosphorus. A Monte Carlo simulation was conducted for cell 1 of the Stephenville system to quantify variability of the system. The model was calibrated and validated using two wetland systems...

  13. Subsurface flow constructed wetland: treatment of domestic wastewater by gravel and tire chip media and ultraviolet disinfection of effluent 

    E-Print Network [OSTI]

    Richmond, Amanda Yvette

    2002-01-01

    spray application, wetland effluent must be disinfected (traditionally by chlorine). This study determines the treatment efficiency of SFCWs filled with gravel or tire chip media to treat domestic wastewater and the effectiveness of ultraviolet (UV...

  14. The attitude and knowledge relationships between secondary agriculture and science students' participation in multidisciplinary education and environmental/wetland restoration 

    E-Print Network [OSTI]

    Campbell, Amy Noelle

    1994-01-01

    The objective of this research project was to test student knowledge and attitude changes towards wetland ecosystems, Environmental Science and Horticulture after the completion of an interdisciplinary mini-unit and propagation experiment...

  15. Wetland assessment of the effects of construction and operation of a depleteduranium hexafluoride conversion facility at the Portsmouth, Ohio, site.

    SciTech Connect (OSTI)

    Van Lonkhuyzen, R.

    2005-09-09

    The U.S. Department of Energy (DOE) Depleted Uranium Hexafluoride (DUF{sub 6}) Management Program evaluated alternatives for managing its inventory of DUF{sub 6} and issued the ''Programmatic Environmental Impact Statement for Alternative Strategies for the Long-Term Management and Use of Depleted Uranium Hexafluoride'' (DUF{sub 6} PEIS) in April 1999 (DOE 1999). The DUF{sub 6} inventory is stored in cylinders at three DOE sites: Paducah, Kentucky; Portsmouth, Ohio; and East Tennessee Technology Park (ETTP), near Oak Ridge, Tennessee. In the Record of Decision for the DUF{sub 6} PEIS, DOE stated its decision to promptly convert the DUF{sub 6} inventory to a more stable chemical form. Subsequently, the U.S. Congress passed, and the President signed, the ''2002 Supplemental Appropriations Act for Further Recovery from and Response to Terrorist Attacks on the United States'' (Public Law No. 107-206). This law stipulated in part that, within 30 days of enactment, DOE must award a contract for the design, construction, and operation of a DUF{sub 6} conversion plant at the Department's Paducah, Kentucky, and Portsmouth, Ohio, sites, and for the shipment of DUF{sub 6} cylinders stored at ETTP to the Portsmouth site for conversion. This wetland assessment has been prepared by DOE, pursuant to Executive Order 11990 (''Protection of Wetlands'') and DOE regulations for implementing this Executive Order as set forth in Title 10, Part 1022, of the ''Code of Federal Regulations'' (10 CFR Part 1022 [Compliance with Floodplain and Wetland Environmental Review Requirements]), to evaluate potential impacts to wetlands from the construction and operation of a conversion facility at the DOE Portsmouth site. Approximately 0.02 acre (0.009 ha) of a 0.08-acre (0.03-ha) palustrine emergent wetland would likely be eliminated by direct placement of fill material during facility construction at Location A. Portions of this wetland that are not filled may be indirectly affected by an altered hydrologic regime because of the proximity of construction, possibly resulting in a decreased frequency or duration of inundation or soil saturation, and potential loss of hydrology necessary to sustain wetland conditions. Construction at Locations B or C would not result in direct impacts to wetlands. However, the hydrologic characteristics of nearby wetlands could be indirectly affected by adjacent construction. Executive Order 11990, ''Protection of Wetlands'', requires federal agencies to minimize the destruction, loss, or degradation of wetlands, and to preserve and enhance the natural and beneficial uses of wetlands. DOE regulations for implementing Executive Order 11990 are set forth in 10 CFR Part 1022. The impacts at Location A may potentially be avoided by an alternative routing of the entrance road, or mitigation may be developed in coordination with the appropriate regulatory agencies. Unavoidable impacts to wetlands that are within the jurisdiction of the USACE may require a CWA Section 404 Permit, which would trigger the requirement for a CWA Section 401 Water Quality Certification from the State of Ohio. Unavoidable impacts to isolated wetlands may require an Isolated Wetlands Permit from the Ohio Environmental Protection Agency. A mitigation plan may be required prior to the initiation of construction. Cumulative impacts to wetlands are anticipated to be negligible to minor for the proposed action, in conjunction with the effects of existing conditions and other activities. Habitat disturbance would involve settings commonly found in this part of Ohio, which in many cases involve previously disturbed habitats.

  16. Experimental Study on Wave Transformation and Nearshore Circulation on a Variable Bathymetry in Wetlands 

    E-Print Network [OSTI]

    Truong, Melanie Khanh Phuong

    2012-10-19

    Hurricanes are one of the primary threats to the Texas coastal environment and economy. They generate large wave and storm surges that have caused much damage on the Texas coast in the past. Understanding both the hydrodynamic processes that damage...

  17. Tidal Disruption Flares as the Source of Ultra-high Energy Cosmic Rays

    E-Print Network [OSTI]

    Glennys R. Farrar

    2012-10-03

    The optical spectral energy distributions of two tidal disruption flares identified by van Velzen et al. (2011) in archival SDSS data, are found to be well-fit by a thin-accretion-disk model. Furthermore, the inferred Supermassive Black Hole mass values agree well with the SMBH masses estimated from the host galaxy properties. Integrating the model SEDs to include shorter wavelength contributions provides an estimate of the bolometric luminosities of the accretion disks. The resultant bolometric luminosities are well in excess of the minimum required for accelerating UHECR protons. In combination with the recent observational estimate of the TDF rate (van Velzen and Farrar, these Proceedings), the results presented here strengthen the case that transient jets formed in tidal disruption events may be responsible for accelerating all or most UHECRs.

  18. The X-ray through Optical Fluxes and Line Strengths of Tidal Disruption Events

    E-Print Network [OSTI]

    Roth, Nathaniel; Guillochon, James; Ramirez-Ruiz, Enrico

    2015-01-01

    Observations of luminous flares resulting from the possible tidal disruption of stars by supermassive black holes have raised a number of puzzles. Outstanding questions include the origin of the optical and ultraviolet (UV) flux, the weakness of hydrogen lines in the spectrum, and the occasional simultaneous observation of x-rays. Here we study the emission from tidal disruption events (TDEs) produced as radiation from black hole accretion propagates through an extended, optically thick envelope formed from stellar debris. We analytically describe key physics controlling spectrum formation, and present detailed radiative transfer calculations that model the spectral energy distribution (SED) and optical line strengths of TDEs near peak brightness. The steady-state transfer is coupled to a non local thermodynamic equilibrium treatment of the excitation and ionization states of hydrogen, helium and oxygen (as a representative metal). Our calculations show how an extended envelope can reprocess a fraction of sof...

  19. Tidal Disruption Flares as the Source of Ultra-high Energy Cosmic Rays

    E-Print Network [OSTI]

    Farrar, Glennys R

    2012-01-01

    The optical spectral energy distributions of two tidal disruption flares identified by van Velzen et al. (2011) in archival SDSS data, are found to be well-fit by a thin-accretion-disk model. Furthermore, the inferred Supermassive Black Hole mass values agree well with the SMBH masses estimated from the host galaxy properties. Integrating the model SEDs to include shorter wavelength contributions provides an estimate of the bolometric luminosities of the accretion disks. The resultant bolometric luminosities are well in excess of the minimum required for accelerating UHECR protons. In combination with the recent observational estimate of the TDF rate (van Velzen and Farrar, these Proceedings), the results presented here strengthen the case that transient jets formed in tidal disruption events may be responsible for accelerating all or most UHECRs.

  20. CONSTRAINING TIDAL DISSIPATION IN STARS FROM THE DESTRUCTION RATES OF EXOPLANETS

    SciTech Connect (OSTI)

    Penev, Kaloyan; Jackson, Brian; Spada, Federico; Thom, Nicole

    2012-06-01

    We use the distribution of extrasolar planets in circular orbits around stars with surface convective zones detected by ground-based transit searches to constrain how efficiently tides raised by the planet are dissipated on the parent star. We parameterize this efficiency as a tidal quality factor (Q{sub *}). We conclude that the population of currently known planets is inconsistent with Q{sub *} < 10{sup 7} at the 99% level. Previous studies show that values of Q{sub *} between 10{sup 5} and 10{sup 7} are required in order to explain the orbital circularization of main-sequence low-mass binary stars in clusters, suggesting that different dissipation mechanisms might be acting in the two cases, most likely due to the very different tidal forcing frequencies relative to the stellar rotation frequency occurring for star-star versus planet-star systems.