Sample records for aquifer cxs applied

  1. AQUIFER THERMAL ENERGY STORAGE

    E-Print Network [OSTI]

    Tsang, C.-F.

    2011-01-01T23:59:59.000Z

    aquifers for thermal energy storage. Problems outlined aboveModeling of Thermal Energy Storage in Aquifers," Proceed-ings of Aquifer Thermal Energy Storage Workshop, Lawrence

  2. AQUIFER THERMAL ENERGY STORAGE

    E-Print Network [OSTI]

    Tsang, C.-F.

    2011-01-01T23:59:59.000Z

    aquifers for thermal energy storage. Problems outlined abovean Aquifer Used for Hot Water Storage: Digital Simulation ofof Aquifer Systems for Cyclic Storage of Water," of the Fall

  3. AQUIFER THERMAL ENERGY STORAGE

    E-Print Network [OSTI]

    Tsang, C.-F.

    2011-01-01T23:59:59.000Z

    using aquifers for thermal energy storage. Problems outlinedmatical Modeling of Thermal Energy Storage in Aquifers,"ings of Aquifer Thermal Energy Storage Workshop, Lawrence

  4. AQUIFER THERMAL ENERGY STORAGE

    E-Print Network [OSTI]

    Tsang, C.-F.

    2011-01-01T23:59:59.000Z

    using aquifers for thermal energy storage. Problems outlinedmatical Modeling of Thermal Energy Storage in Aquifers,"Proceed- ings of Aquifer Thermal Energy Storage Workshop,

  5. The 1997 Irrigation Suspension Program for the Edwards Aquifer: Evaluation and Alternatives

    E-Print Network [OSTI]

    Keplinger, Keith O.; McCarl, Bruce A.

    (drought) Management Rules. The Aquifer region, however, experienced a wet Spring in 1997, so that even irrigators not enrolled in the program applied little or no irrigation water. If conditions were dry in Spring 1997, aquifer simulation results indicate...

  6. The 1997 Irrigation Suspension Program for the Edwards Aquifer: Evaluation and Alternatives 

    E-Print Network [OSTI]

    Keplinger, Keith O.; McCarl, Bruce A.

    1998-01-01T23:59:59.000Z

    (drought) Management Rules. The Aquifer region, however, experienced a wet Spring in 1997, so that even irrigators not enrolled in the program applied little or no irrigation water. If conditions were dry in Spring 1997, aquifer simulation results indicate...

  7. Apply

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProductsAlternative FuelsSanta3Appliance andApplicationBerkeleyAppliedApply

  8. CX-008476: Categorical Exclusion Determination | Department of...

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

    CX-008476: Categorical Exclusion Determination Small Scale Field Test Demonstrating Carbon Dioxide Sequestration in the Arbuckle Saline Aquifer CX(s) Applied: A9, B1.15,...

  9. Aquifer behavior with reinjection

    E-Print Network [OSTI]

    Bonet, Euclides Jose

    1967-01-01T23:59:59.000Z

    rates, so only the latter is considered here. Six cases have been treated here. They are: f) A linear aquifer of finite width and extent. Water is injected into the aquifer at point x, y at constant rate. The pres- 0 0 sure along the line x = o... is maintained at zero pressure. See Figure f. Equations showing the potential distribution, rates, velocity and cumulative influx have been developed. Certain numerical results are shown. 2) A linear aquifer of finite width and extent. Water is injected...

  10. Aquifer behavior with reinjection 

    E-Print Network [OSTI]

    Bonet, Euclides Jose

    1967-01-01T23:59:59.000Z

    AQUIFER BEHAVIOR WITH REINJECTION A Thesis By EUCLIDES JOSE BONET Submitted to the Graduate College of the Texas ARUM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May, f967 Major Subject... Petroleum Engineering AQUIFER BEHAVIOR WITH REINJECTION A Thesis By E UC LI DES JOSE BONE T Approved as to style and content by: (Chairman of Committee) (Member) (Member) May, 1967 ACKNOWLEDGMENT Thanks are due to Petroleo Brasilerio S...

  11. Analyzing aquifers associated with gas reservoirs using aquifer influence functions

    E-Print Network [OSTI]

    Targac, Gary Wayne

    1988-01-01T23:59:59.000Z

    - teristics of the associated aquifer are vital to proper management of the reservoir. Typically, the reservoir and associated aquifer are located in a geologic setting which is highly faulted. Limited geologic and seismic knowledge exists about...ANALYZING AQUIFERS ASSOCIATED WITH GAS RESERVOIRS USING AQUIFER INFLUENCE FUNCTIONS A Thesis by GARY WAYNE TARGAC Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER...

  12. Analyzing aquifers associated with gas reservoirs using aquifer influence functions 

    E-Print Network [OSTI]

    Targac, Gary Wayne

    1988-01-01T23:59:59.000Z

    ANALYZING AQUIFERS ASSOCIATED WITH GAS RESERVOIRS USING AQUIFER INFLUENCE FUNCTIONS A Thesis by GARY WAYNE TARGAC Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE V z May 1988 z V z z I- Major Subject: Petroleum Engineering ANALYZING AQUIFERS ASSOCIATED WITH GAS RESERVOIRS USING AQUIFER INFLUENCE FUNCTIONS A Thesis by GARY WAYNE TARGAC Approved as to style and content by: (Chair of Committ R...

  13. THERMAL ENERGY STORAGE IN AQUIFERS WORKSHOP

    E-Print Network [OSTI]

    Authors, Various

    2011-01-01T23:59:59.000Z

    Survey of Thermal Energy Storage in Aquifers Coupled withconcept of thermal energy storage in aquifers was suggestedLow Temperature Thermal Energy Storage Program of Oak Ridge

  14. FEWA: a Finite Element model of Water flow through Aquifers

    SciTech Connect (OSTI)

    Yeh, G.T.; Huff, D.D.

    1983-11-01T23:59:59.000Z

    This report documents the implementation and demonstration of a Finite Element model of Water flow through Aquifers (FEWA). The particular features of FEWA are its versatility and flexibility to deal with as many real-world problems as possible. Point as well as distributed sources/sinks are included to represent recharges/pumpings and rainfall infiltrations. All sources/sinks can be transient or steady state. Prescribed hydraulic head on the Dirichlet boundaries and fluxes on Neumann or Cauchy boundaries can be time-dependent or constant. Source/sink strength over each element and node, hydraulic head at each Dirichlet boundary node, and flux at each boundary segment can vary independently of each other. Either completely confined or completely unconfined aquifers, or partially confined and partially unconfined aquifers can be dealt with effectively. Discretization of a compound region with very irregular curved boundaries is made easy by including both quadrilateral and triangular elements in the formulation. Large-field problems can be solved efficiently by including a pointwise iterative solution strategy as an optional alternative to the direct elimination solution method for the matrix equation approximating the partial differential equation of groundwater flow. FEWA also includes transient flow through confining leaky aquifers lying above and/or below the aquifer of interest. The model is verified against three simple cases to which analytical solutions are available. It is then demonstrated by two examples of how the model can be applied to heterogeneous and anisotropic aquifers with transient boundary conditions, time-dependent sources/sinks, and confining aquitards for a confined aquifer of variable thickness and for a free surface problem in an unconfined aquifer, respectively. 20 references, 25 figures, 8 tables.

  15. Transboundary aquifers: Southwestern states assess

    E-Print Network [OSTI]

    Wythe, Kathy

    2008-01-01T23:59:59.000Z

    and Mexico borders. The federally funded project, known as United States-Mexico Transboundary Aquifer Assessment, will provide a scientific foundation for state and local officials to address pressing water resources challenges in the United States... heavily on groundwater in aquifers. Municipal and other water users are increasing their use of groundwater, raising concerns about the long-term quality and availability of this supply, Michelsen said. ?Groundwater is the major and, in many areas...

  16. Transboundary aquifers: Southwestern states assess 

    E-Print Network [OSTI]

    Wythe, Kathy

    2008-01-01T23:59:59.000Z

    tx H2O | pg. 14 Southwestern states assess Researchers from three universities in Texas, New Mexico, and Arizona and from the U.S. Geological Survey (USGS) are partnering on a new project to evaluate aquifers that span the United States... and Mexico borders. The federally funded project, known as United States-Mexico Transboundary Aquifer Assessment, will provide a scientific foundation for state and local officials to address pressing water resources challenges in the United States...

  17. THERMAL ENERGY STORAGE IN AQUIFERS WORKSHOP

    E-Print Network [OSTI]

    Authors, Various

    2011-01-01T23:59:59.000Z

    and J. Schwarz, Survey of Thermal Energy Storage in AquifersLow Temperature Thermal Energy Storage Program of Oak RidgeAquifers for Seasonal Thermal Energy Storage: An Overview of

  18. AQUIFER CHARACTERIZATION JOHN S. BRIDGE

    E-Print Network [OSTI]

    Bioremediation Site in southwestern Michigan, where detailed estimates of aquifer properties were needed to accurately simulate multi-component reactive transport and to design an effective bioremediation strategy-long continuous cores was collected in the vicinity of the bioremediation-system delivery wells. These cores were

  19. CX-008478: Categorical Exclusion Determination | Department of...

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

    CX-008478: Categorical Exclusion Determination Small Scale Field Test Demonstrating Carbon Dioxide Sequestration in the Arbuckle Saline Aquifer CX(s) Applied: A9, B3.1, B5.3...

  20. CX-008477: Categorical Exclusion Determination | Department of...

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

    CX-008477: Categorical Exclusion Determination Small Scale Field Test Demonstrating Carbon Dioxide Sequestration in the Arbuckle Saline Aquifer CX(s) Applied: A9, B3.1, B3.7,...

  1. CX-008474: Categorical Exclusion Determination | Department of...

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

    CX-008474: Categorical Exclusion Determination Small Scale Field Test Demonstrating Carbon Dioxide Sequestration in the Arbuckle Saline Aquifer CX(s) Applied: B1.15, B3.6,...

  2. CX-008475: Categorical Exclusion Determination | Department of...

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

    CX-008475: Categorical Exclusion Determination Small Scale Field Test Demonstrating Carbon Dioxide Sequestration in the Arbuckle Saline Aquifer CX(s) Applied: A9, B3.1, B3.7,...

  3. CX-008441: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Modeling Carbon Dioxide Sequestration in Saline Aquifer and Depleted Oil Reservoir (Task 17 - Office Work) CX(s) Applied: A9, A11 Date: 06/26/2012 Location(s): Kansas Offices(s): National Energy Technology Laboratory

  4. CX-008440: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Modeling Carbon Dioxide Sequestration in Saline Aquifer and Depleted Oil Reservoir (Task 17 - Seismic Survey) CX(s) Applied: B3.1 Date: 06/26/2012 Location(s): Kansas Offices(s): National Energy Technology Laboratory

  5. Radon Concern in the Hickory Aquifer

    E-Print Network [OSTI]

    Crawford, Amanda

    2005-01-01T23:59:59.000Z

    Randolph conducts her research at a small field site in the Katemcy Creek watershed in northern Mason and southern McCulloch counties. She hopes to gather enough data to achieve the first step in a long-term assessment of radionuclides in the Hickory... in the world's aquifers that are geologically and hydrologically similar to the Hickory aquifer,? she said, anticipating her research leading to further investigations of relationships between radon gas and its parent nuclides, aquifer mineralogy...

  6. EXPERIMENTAL AND THEORETICAL STUDIES OF THERMAL ENERGY STORAGE IN AQUIFERS

    E-Print Network [OSTI]

    Tsang, Chin Fu

    2011-01-01T23:59:59.000Z

    In Proceed- ings of Thermal Energy Storage in Aquifers Work-Mathematical Modeling of Thermal Energy storage in Aquifers.In Proceed- ings of Thermal Energy Storage in Aquifers Work-

  7. Seymour Aquifer Water Quality Improvement Project Final Report 

    E-Print Network [OSTI]

    Sij, J.; Morgan, C.; Belew, M.; Jones, D.; Wagner, K.

    2008-01-01T23:59:59.000Z

    The Seymour Aquifer is a shallow aquifer underlying over 300,000 acres in 20 counties in northwest central Texas. High nitrate concentrations are widespread in the Seymour Aquifer. Median nitrate levels in Knox, Haskell, Baylor, Hall, Wichita...

  8. AQUIFER THERMAL ENERGY STORAGE-A SURVEY

    E-Print Network [OSTI]

    Tsang, Chin Fu

    2012-01-01T23:59:59.000Z

    High temperature underground thermal energy storage, inProceedings, Thermal Energy Storage in Aquifers Workshop:underground thermal energy storage, in ATES newsletter:

  9. Regional Analysis And Characterization Of Fractured Aquifers...

    Open Energy Info (EERE)

    Regional Analysis And Characterization Of Fractured Aquifers In The Virginia Blue Ridge And Piedmont Provinces Jump to: navigation, search OpenEI Reference LibraryAdd to library...

  10. Aquifer Protection Area Land Use Regulations (Connecticut)

    Broader source: Energy.gov [DOE]

    These regulations describe allowable activities within aquifer protection areas, the procedure by which such areas are delineated, and relevant permit requirements. The regulations also describe...

  11. THERMAL ENERGY STORAGE IN AQUIFERS WORKSHOP

    E-Print Network [OSTI]

    Authors, Various

    2011-01-01T23:59:59.000Z

    Survey of Thermal Energy Storage in Aquifers Coupled withAnnual Thermal Energy Storage Contractors' InformationLarge-Scale Thermal Energy Storage for Cogeneration and

  12. AQUIFER THERMAL ENERGY STORAGE-A SURVEY

    E-Print Network [OSTI]

    Tsang, Chin Fu

    2012-01-01T23:59:59.000Z

    1978, High temperature underground thermal energy storage,in Proceedings, Thermal Energy Storage in Aquifers Workshop:High temperature underground thermal energy storage, in ATES

  13. THE SNAKE RIVER PLAIN AQUIFER THE SNAKE RIVER...

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

    the complex to be found in the aquifer are volatile organic contaminants - particularly carbon tetrachloride ("carbon tet"). The carbon tet found in the aquifer is attributed to...

  14. ENERGY STORAGE IN AQUIFERS - - A SURVEY OF RECENT THEORETICAL STUDIES

    E-Print Network [OSTI]

    Tsang, Chin Fu

    2013-01-01T23:59:59.000Z

    temperature underground thermal energy storage. In Proc. Th~al modeling of thermal energy storage in aquifers. In ~~-Mathematical modeling; thermal energy storage; aquifers;

  15. aquifer beneath yucca: Topics by E-print Network

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

    AQUIFER BIBI. IOGRAPHY... Wauters, John F 2012-06-07 38 Modelling Bioremediation of Uranium Contaminated Aquifers Edinburgh, University of - Research Archive Summary:...

  16. aquifer recharge areas: Topics by E-print Network

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

    processes across4 Fisher, Andrew 4 Investigation of Possible Extra Recharge During Pumping in Nottinghant .Aquifer Geosciences Websites Summary: completely from aquifer...

  17. aquifer recharge investigations: Topics by E-print Network

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

    25 Next Page Last Page Topic Index 1 Investigation of Possible Extra Recharge During Pumping in Nottinghant .Aquifer Geosciences Websites Summary: completely from aquifer...

  18. aquifer testing recommendations: Topics by E-print Network

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

    Sand-And-Gravel Aquifer Santa; Christopher J. Richards 3 Airflow induced by pumping tests in unconfined aquifer with a low-permeability cap Geosciences Websites Summary:...

  19. alto piura aquifer: Topics by E-print Network

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

    An impermeable layer isolates these two aquifers. This layer is deleted in some area and causes connection between two aquifers. This relationship affects the unconfined...

  20. AQUIFER STORAGE SITE EVALUATION AND MONITORING

    E-Print Network [OSTI]

    Edwards, Mike

    CO2 AQUIFER STORAGE SITE EVALUATION AND MONITORING Edited and compiled by Martin Smith, David Campbell, Eric Mackay and Debbie Polson Understanding the challenges of CO2 storage: results of the CASSEM Project Im agecopyrightofNERC #12;#12;CO2 Aquifer storage site evaluation and monitoring EDITED

  1. Laboratory Experiments to Evaluate Diffusion of 14C into Nevada Test Site Carbonate Aquifer Matrix

    SciTech Connect (OSTI)

    Ronald L. Hershey; William Howcroft; Paul W. Reimus

    2003-03-01T23:59:59.000Z

    Determination of groundwater flow velocities at the Nevada Test Site is important since groundwater is the principal transport medium of underground radionuclides. However, 14C-based groundwater velocities in the carbonate aquifers of the Nevada Test Site are several orders of magnitude slower than velocities derived from the Underground Test Area regional numerical model. This discrepancy has been attributed to the loss or retardation of 14C from groundwater into the surrounding aquifer matrix making 14C-based groundwater ages appear much older. Laboratory experiments were used to investigate the retardation of 14C in the carbonate aquifers at the Nevada Test Site. Three sets of experiments were conducted evaluating the diffusion of 14C into the carbonate aquifer matrix, adsorption and/or isotopic exchange onto the pore surfaces of the carbonate matrix, and adsorption and/or isotopic exchange onto the fracture surfaces of the carbonate aquifer. Experimental results a nd published aquifer matrix and fracture porosities from the Lower Carbonate Aquifer were applied to a 14C retardation model. The model produced an extremely wide range of retardation factors because of the wide range of published aquifer matrix and fracture porosities (over three orders of magnitude). Large retardation factors suggest that groundwater with very little measured 14C activity may actually be very young if matrix porosity is large relative to the fracture porosity. Groundwater samples collected from highly fractured aquifers with large effective fracture porosities may have relatively small correction factors, while samples from aquifers with a few widely spaced fractures may have very large correction factors. These retardation factors were then used to calculate groundwater velocities from a proposed flow path at the Nevada Test Site. The upper end of the range of 14C correction factors estimated groundwater velocities that appear to be at least an order of magnitude too high compared to published velocities. The lower end of the range of 14C correction factors falls within the range of reported velocities. From these results, future experimental studies (both laboratory and field scale) to support 14C groundwater age dating should focus on obtaining better estimates of aquifer properties including matrix and fracture porosities.

  2. Estimation of regional aquifer parameters using baseflow recession data Victor M. Ponce

    E-Print Network [OSTI]

    Ponce, V. Miguel

    's (1963) theoretical model of groundwater flow to a stream is used to estimate regional aquifer parameters diffusiv- ity, hydrogeology, Mexico, Papaloapan. 1 #12;1. Introduction In groundwater hydrology basin. More recent studies have applied Rorabaugh's model to estimate groundwater recharge in diverse

  3. AQUIFER THERMAL ENERGY STORAGE-A SURVEY

    E-Print Network [OSTI]

    Tsang, Chin Fu

    2012-01-01T23:59:59.000Z

    solid-fluid heat storage systems in the ground; extractions0 Thermal storage of cold water in ground water aquifers forA. 8 1971, Storage of solar energy in a sandy-gravel ground:

  4. Streamline simulation of Surfactant Enhanced Aquifer Remediation 

    E-Print Network [OSTI]

    Tunison, Douglas Irvin

    1996-01-01T23:59:59.000Z

    Nonaqueous Phase Liquids (NAPLS) are a recognized source of groundwater contamination. Surfactant Enhanced Aquifer Remediation (SEAR) shows promise in increasing the efficiency and effectiveness over traditional "pump and treat" NAPL remediation...

  5. The Edwards Aquifer: An Economic Perspective 

    E-Print Network [OSTI]

    Merrifield, John D.; McCarl, Bruce A.; Griffin, Ronald C.; Emerson, Peter M.; Collinge, Robert A.

    1993-01-01T23:59:59.000Z

    now served by the Edwards Aquifer. A system of transferable groundwater rights is commendable for several reasons. It is flexible because it accomodates unforeseeable future shifts in demand. Transferable rights allow voluntary action on behalf...

  6. Modelling Bioremediation of Uranium Contaminated Aquifers 

    E-Print Network [OSTI]

    Rotter, Ben E G

    2008-01-01T23:59:59.000Z

    Radionuclide extraction, processing and storage have resulted in a legacy of radionuclide-contaminated groundwater aquifers worldwide. An emerging remediation technology for such sites is the in situ immobilisation of ...

  7. aquifers: Topics by E-print Network

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

    31 Gulf Service Station... Neathery, Jeffrey Stephen 2012-06-07 331 Evaluation of kinetic controls on sulfate reduction in a contaminated wetland-aquifer system Texas A&M...

  8. THERMAL ENERGY STORAGE IN AQUIFERS WORKSHOP

    E-Print Network [OSTI]

    Authors, Various

    2011-01-01T23:59:59.000Z

    HAUSZ, W. , 1977. "Seasonal Storage in District Heating,"District Heating, July-August-September, 1977, pp. 5-11.aquifer storage for district heating and cooling. C. W.

  9. THERMAL ENERGY STORAGE IN AQUIFERS WORKSHOP

    E-Print Network [OSTI]

    Authors, Various

    2011-01-01T23:59:59.000Z

    and J. Schwarz, Survey of Thermal Energy Storage in AquifersB. Quale. Seasonal storage of thermal energy in water in theSecond Annual Thermal Energy Storage Contractors'

  10. A new pseudo time for geopressured aquifers

    E-Print Network [OSTI]

    Villegas, Mauricio Eduardo

    1992-01-01T23:59:59.000Z

    Time variable linearizes the pressure behavior of a single fluid flowing through a porous medium. Four cases were simulated: (1) three different aquifers at different states of flow and at a constant rate of water influx and, (2) a variable rate... to the diffusivity equati. on when nonlinear behavior exist and when rate changes are not very important. Traditional methods to calculate water influx in geopressured aquifers are improved by using the new Pseudo Time. DEDICATION To my family for what I am...

  11. A new pseudo time for geopressured aquifers 

    E-Print Network [OSTI]

    Villegas, Mauricio Eduardo

    1992-01-01T23:59:59.000Z

    A NEW PSEUDO TIME FOR GEOPRESSURED AQUIFERS A Thesis by MAURICIO EDUARDO VILLEGAS 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 May 1992... Major Subject: Petroleum Engineering A NEW PSEUDO TIME METHOD FOR GEOPRESSURED AQUIFERS A Thesis by MAURICIO EDUARDO VILLEGAS Approved as to style and content by: Dr. Robert A. Watte ger (Chair of Comm ee) Dr. James E. Russell (Member) Dr...

  12. Aquitard control of stream-aquifer interaction and flow to a horizontal well in coastal aquifers 

    E-Print Network [OSTI]

    Sun, Dongmin

    2007-04-25T23:59:59.000Z

    from aquitard as a source term inside the aquifer which is called Hantush�s assumption (1964), we linked flows in aquitard and aquifer by the idea of continuity of flux and drawdown. The result in this chapter is compared with that of Zhan and Park...

  13. ENERGY STORAGE IN AQUIFERS - - A SURVEY OF RECENT THEORETICAL STUDIES

    E-Print Network [OSTI]

    Tsang, Chin Fu

    2013-01-01T23:59:59.000Z

    underground thermal energy storage. In Proc. Th~rmal1980), 'I'hermal energy storage? in a confined aquifer·--al modeling of thermal energy storage in aquifers. In ~~-

  14. A Lumped Parameter Model for the Edwards Aquifer

    E-Print Network [OSTI]

    Anaya, Roberto; Wanakule, Nisai

    A lumped parameter model has been developed to simulate monthly water levels and spring flows in the Edwards Aquifer. It is less complex and easier to use than the existing complex finite difference models for the Edwards Aquifer. The lumped...

  15. Analyzing aquifer driven reservoirs using a computer-oriented approach

    E-Print Network [OSTI]

    Flumerfelt, Raymond William

    1996-01-01T23:59:59.000Z

    on knowledge of the aquifer properties, nor does it depend specifically on a large amount of accurate pressure and production data. Instead, an initial reservoir model, based on the flow properties, boundary conditions, and geometry of the aquifer, is refined...

  16. A Lumped Parameter Model for the Edwards Aquifer 

    E-Print Network [OSTI]

    Anaya, Roberto; Wanakule, Nisai

    1993-01-01T23:59:59.000Z

    A lumped parameter model has been developed to simulate monthly water levels and spring flows in the Edwards Aquifer. It is less complex and easier to use than the existing complex finite difference models for the Edwards Aquifer. The lumped...

  17. Economic and Hydrologic Implications of Proposed Edwards Aquifer Management Plans 

    E-Print Network [OSTI]

    Dillon, Carl R.; Jones, Lonnie L.; Williams, R. Lynn; Jordan, Wayne R.; McCarl, Bruce A.

    1993-01-01T23:59:59.000Z

    The Edwards Aquifer underlies a large region in south central Texas extending from west of Uvalde to Austin. The karstic aquifer supports irrigated agriculture in the western part of the region, provides the sole source of water supply for San...

  18. Fluid Dynamics of Carbon Dioxide Disposal into Saline Aquifers

    E-Print Network [OSTI]

    Garcia, Julio Enrique

    2003-01-01T23:59:59.000Z

    natural gas ?a, storage in aquifers in the midwestern U.S states of Illinois and Indiana and salt caverns

  19. Seymour Aquifer Water Quality Improvement Project Final Report

    E-Print Network [OSTI]

    Sij, J.; Morgan, C.; Belew, M.; Jones, D.; Wagner, K.

    on over 2,500 acres. NRCS also began funding irrigation improvements in Haskell, Knox, Baylor, Wilbarger, Hardeman and Foard counties through the Seymour Aquifer Special Emphasis Area. Since this Special Emphasis Area was established in 2004, over $16.../Need Statement Figure 1. Seymour Aquifer Region (TWDB 2004). The Seymour Aquifer is a shallow, unconfined aquifer formed by isolated pockets of alluvial deposits (Figure 1). It underlies over 300,000 acres in 20 counties in north central Texas...

  20. Aquifer thermal energy storage. International symposium: Proceedings

    SciTech Connect (OSTI)

    NONE

    1995-05-01T23:59:59.000Z

    Aquifers have been used to store large quantities of thermal energy to supply process cooling, space cooling, space heating, and ventilation air preheating, and can be used with or without heat pumps. Aquifers are used as energy sinks and sources when supply and demand for energy do not coincide. Aquifer thermal energy storage may be used on a short-term or long-term basis; as the sole source of energy or as a partial storage; at a temperature useful for direct application or needing upgrade. The sources of energy used for aquifer storage are ambient air, usually cold winter air; waste or by-product energy; and renewable energy such as solar. The present technical, financial and environmental status of ATES is promising. Numerous projects are operating and under development in several countries. These projects are listed and results from Canada and elsewhere are used to illustrate the present status of ATES. Technical obstacles have been addressed and have largely been overcome. Cold storage in aquifers can be seen as a standard design option in the near future as it presently is in some countries. The cost-effectiveness of aquifer thermal energy storage is based on the capital cost avoidance of conventional chilling equipment and energy savings. ATES is one of many developments in energy efficient building technology and its success depends on relating it to important building market and environmental trends. This paper attempts to provide guidance for the future implementation of ATES. Individual projects have been processed separately for entry onto the Department of Energy databases.

  1. Fluid Dynamics of Carbon Dioxide Disposal into Saline Aquifers

    SciTech Connect (OSTI)

    Garcia, Julio Enrique

    2003-12-18T23:59:59.000Z

    Injection of carbon dioxide (CO{sub 2}) into saline aquifers has been proposed as a means to reduce greenhouse gas emissions (geological carbon sequestration). Large-scale injection of CO{sub 2} will induce a variety of coupled physical and chemical processes, including multiphase fluid flow, fluid pressurization and changes in effective stress, solute transport, and chemical reactions between fluids and formation minerals. This work addresses some of these issues with special emphasis given to the physics of fluid flow in brine formations. An investigation of the thermophysical properties of pure carbon dioxide, water and aqueous solutions of CO{sub 2} and NaCl has been conducted. As a result, accurate representations and models for predicting the overall thermophysical behavior of the system CO{sub 2}-H{sub 2}O-NaCl are proposed and incorporated into the numerical simulator TOUGH2/ECO{sub 2}. The basic problem of CO{sub 2} injection into a radially symmetric brine aquifer is used to validate the results of TOUGH2/ECO2. The numerical simulator has been applied to more complex flow problem including the CO{sub 2} injection project at the Sleipner Vest Field in the Norwegian sector of the North Sea and the evaluation of fluid flow dynamics effects of CO{sub 2} injection into aquifers. Numerical simulation results show that the transport at Sleipner is dominated by buoyancy effects and that shale layers control vertical migration of CO{sub 2}. These results are in good qualitative agreement with time lapse surveys performed at the site. High-resolution numerical simulation experiments have been conducted to study the onset of instabilities (viscous fingering) during injection of CO{sub 2} into saline aquifers. The injection process can be classified as immiscible displacement of an aqueous phase by a less dense and less viscous gas phase. Under disposal conditions (supercritical CO{sub 2}) the viscosity of carbon dioxide can be less than the viscosity of the aqueous phase by a factor of 15. Because of the lower viscosity, the CO{sub 2} displacement front will have a tendency towards instability. Preliminary simulation results show good agreement between classical instability solutions and numerical predictions of finger growth and spacing obtained using different gas/liquid viscosity ratios, relative permeability and capillary pressure models. Further studies are recommended to validate these results over a broader range of conditions.

  2. Radon Concern in the Hickory Aquifer 

    E-Print Network [OSTI]

    Crawford, Amanda

    2005-01-01T23:59:59.000Z

    in the Hickory Aquifer's groundwater poses health risks for residents in the area. Radon is a natural, radioactive gas that may be found indoors in air or drinking water. Radon is the decay product of radium, so radon indi- rectly reflects the presence... of radium. Radon in groundwater occurs from the decay of radium both within the aquifer host rock and in the groundwater itself. It does not react chemically with either, however, because it is a noble or inert gas. About 1 percent to 2 percent...

  3. Aquifer thermal energy storage: a survey

    SciTech Connect (OSTI)

    Tsang, C.F.; Hopkins, D.; Hellstroem, G.

    1980-01-01T23:59:59.000Z

    The disparity between energy production and demand in many power plants has led to increased research on the long-term, large-scale storage of thermal energy in aquifers. Field experiments have been conducted in Switzerland, France, the United States, Japan, and the People's Republic of China to study various technical aspects of aquifer storage of both hot and cold water. Furthermore, feasibility studies now in progress include technical, economic, and environmental analyses, regional exploration to locate favorable storage sites, and evaluation and design of pilot plants. Several theoretical and modeling studies are also under way. Among the topics being studied using numerical models are fluid and heat flow, dispersion, land subsidence or uplift, the efficiency of different injection/withdrawal schemes, buoyancy tilting, numerical dispersion, the use of compensation wells to counter regional flow, steam injection, and storage in narrow glacial deposits of high permeability. Experiments to date illustrate the need for further research and development to ensure successful implementation of an aquifer storage system. Some of the areas identified for further research include shape and location of the hydrodynamic and thermal fronts, choice of appropriate aquifers, thermal dispersion, possibility of land subsidence or uplift, thermal pollution, water chemistry, wellbore plugging and heat exchange efficiency, and control of corrosion.

  4. Aquifer Management for CO2 Sequestration 

    E-Print Network [OSTI]

    Anchliya, Abhishek

    2010-07-14T23:59:59.000Z

    Storage of carbon dioxide is being actively considered for the reduction of green house gases. To make an impact on the environment CO2 should be put away on the scale of gigatonnes per annum. The storage capacity of deep saline aquifers...

  5. Gas Geochemistry of the Dogger Geothermal Aquifer (Paris Basin, France)

    SciTech Connect (OSTI)

    Criaud, A.; Fouillac, C.; Marty, B.; Brach, M.; Wei, H.F.

    1987-01-20T23:59:59.000Z

    The low enthalpy program developed in the Paris Basin provides the opportunity for studying the gas geochemistry of the calcareous aquifer of the Dogger. Hydrocarbons and CO{sub 2} are mainly biogenic, He displays high concentrations. He, Ar and N{sub 2} have multiple origins (radioactive decay, atmospheric migration, biochemical processes). The distribution of the gases in the zones of the basin varies in relation to the general chemistry, sedimentology and hydrodynamics. The gas geothermometers do not apply to this environment but useful estimations of the redox potential of the fluid can be derived from CO{sub 2}/CH{sub 4} and N{sub 2}/NH{sub 4}{sup +} ratios. H{sub 2} and H{sub 2}S are involved in corrosion processes and scaling in the pipes. 12 refs., 3 figs., 2 tabs.

  6. Effects of aquifer interconnection resulting from underground coal gasification

    SciTech Connect (OSTI)

    Stone, R.

    1983-09-01T23:59:59.000Z

    Lawrence Livermore National Laboratory evaluated the effects of aquifer interconnection caused by the collapse of cavities formed in coal seams by two small underground coal gasification experiments in the Powder River Basin, Wyoming. Flow models and field measurements were used to show that the water from one or both of the upper aquifers enters the collapse, rubble and flows down to the lowest aquifer (the gasified coal seam) where it flows away from the collapse zones. The investigations showed that the hydraulic conductivity of the collapse rubble is less than that of the aquifers and provides only a moderately permeable interconnection between them, a marked reduction in hydraulic conductivity of the gasified coal seam near the collapse zones restricts the flow in the seam, away from them; changes in the hydraulic head and flow patterns caused by aquifer interconnection extend generally only 60-90 m away from the experiment sites, whereas flow in the uppermost aquifer at one of the sites may be influenced as far away as 122 m. At both sites, the aquifer interconnection allows water from the uppermost (sand) aquifer, which contains the poorest quality water of the 3 aquifers, to enter one or both of the underlying aquifers.

  7. Aquifer sensitivity assessment modeling at a large scale

    SciTech Connect (OSTI)

    Berg, R.C.; Abert, C.C. (Illinois State Geological Survey, Champaign, IL (United States))

    1994-03-01T23:59:59.000Z

    A 480 square-mile region within Will County, northeastern Illinois was used as a test region for an evaluation of the sensitivity of aquifers to contamination. An aquifer sensitivity model was developed using a Geographic Information System (GIS) with ARC/INFO software to overlay and combine several data layers. Many of the input data layers were developed using 2-dimensional surface modeling (Interactive Surface Modeling (ISM)) and 3-dimensional volume modeling (Geologic Modeling Program (GMP)) computer software. Most of the input data layers (drift thickness, thickness of sand and gravel, depth to first aquifer) were derived from interpolation of descriptive logs for water wells and engineering borings from their study area. A total of 2,984 logs were used to produce these maps. The components used for the authors' model are (1) depth to sand and gravel or bedrock, (2) thickness of the uppermost sand and gravel aquifer, (3) drift thickness, and (4) absence or presence of uppermost bedrock aquifer. The model is an improvement over many aquifer sensitivity models because it combines specific information on depth to the uppermost sand and gravel aquifer with information on the thickness of the uppermost sand and gravel aquifer. The manipulation of the source maps according to rules-based assumptions results in a colored aquifer sensitivity map for the Will County study area. This colored map differentiates 42 aquifer sensitivity map areas by using line patterns within colors. The county-scale model results in an aquifer sensitivity map that can be a useful tool for making land-use planning decisions regarding aquifer protection and management of groundwater resources.

  8. Estimation of Recharge to the Middle Trinity Aquifer of Central Texas Using Water-Level Fluctuations 

    E-Print Network [OSTI]

    Jennings, Marshall; Chad, Thomas; Burch, John; Creutzburg, Brian; Lambert, Lance

    2001-01-01T23:59:59.000Z

    A 23-site monitoring well network located in the Trinity Aquifer region of Central Texas, with all wells penetrating the Middle Trinity Aquifer, was used with available values of aquifer storativity and specific yield to estimate recharge...

  9. Analysis of the semianalytical method for matching aquifer influence functions using an analytical model 

    E-Print Network [OSTI]

    Vega, Leonardo

    1998-01-01T23:59:59.000Z

    For a heterogeneous aquifer of unknown size and shape, ics. Aquifer Influence Functions (AIF) can be used to model the aquifer pressure behavior from field production and pressure data. Two methods have been used in the past to accomplish this...

  10. EXPERIMENTAL AND THEORETICAL STUDIES OF THERMAL ENERGY STORAGE IN AQUIFERS

    E-Print Network [OSTI]

    Tsang, Chin Fu

    2011-01-01T23:59:59.000Z

    Department of Energy, Energy Storage Division through thegeneration and energy storage, Presented at Frontiers ofIn Proceed- ings of Thermal Energy Storage in Aquifers Work-

  11. Methane-eating microbes found in Illinois aquifer | Argonne National...

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

    The Mahomet aquifer is protected by its glacial ancestry; growing and receding glaciers laid alternating blankets of fine glacial "till" and coarser gravel. When humans...

  12. Accidental Gas Emission From Shallow Pressurized Aquifers At...

    Open Energy Info (EERE)

    gas pressurized aquifers confined underneath impermeable layers, within both the volcanic rock pile and the underlying Pleistocene loose sediments. Degassing mostly occurs in...

  13. aquifers geochemical results: Topics by E-print Network

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

    industrial sectors in the area. However, increasing water demand and sustained heavy pumping from the aquifer ... Zhu, Ni, M. Eng. Massachusetts Institute of Technology...

  14. aquifer system idaho: Topics by E-print Network

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

    scatterer InSAR reveals seasonal and long-term aquifer-system response to groundwater pumping and artificial Geosciences Websites Summary: characterize the storage properties of...

  15. aquifer system brazil: Topics by E-print Network

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

    of southern England a simple methodology Hydrology and Earth System Sciences, 6(3), 485495 (2002) EGS Physics Websites Summary: Estimating daily recharge to the Chalk aquifer of...

  16. Chemical and Isotopic Prediction of Aquifer Temperatures in the...

    Open Energy Info (EERE)

    Prediction of Aquifer Temperatures in the Geothermal System at Long Valley, California Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Chemical...

  17. alluvial aquifer nicaragua: Topics by E-print Network

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

    15 kyears B.P. and prevailed in the early Holocene (10 Klinger, Yann 427 Hydrogeologic Controls on Bioactive Zone Development in Biostimulated Aquifers University of Kansas - KU...

  18. EIA - Natural Gas Pipeline Network - Aquifer Storage Reservoir...

    Gasoline and Diesel Fuel Update (EIA)

    Configuration About U.S. Natural Gas Pipelines - Transporting Natural Gas based on data through 20072008 with selected updates Aquifer Underground Natural Gas Storage...

  19. Review of simulation techniques for aquifer thermal energy storage (ATES)

    SciTech Connect (OSTI)

    Mercer, J.W.; Faust, C.R.; Miller, W.J.; Pearson, F.J. Jr.

    1981-03-01T23:59:59.000Z

    The storage of thermal energy in aquifers has recently received considerable attention as a means to conserve and more efficiently use energy supplies. The analysis of aquifer thermal energy storage (ATES) systems will rely on the results from mathematical and geochemical models. Therefore, the state-of-the-art models relevant to ATES was reviewed and evaluated. These models describe important processes active in ATES including ground-water flow, heat transport (heat flow), solute transport (movement of contaminants), and geochemical reactions. In general, available models of the saturated ground-water environment are adequate to address most concerns associated with ATES; that is, design, operation, and environmental assessment. In those cases where models are not adequate, development should be preceded by efforts to identify significant physical phenomena and relate model parameters to measurable quantities. Model development can then proceed with the expectation of an adequate data base existing for the model's eventual use. Review of model applications to ATES shows that the major emphasis has been on generic sensitivity analysis and site characterization. Assuming that models are applied appropriately, the primary limitation on model calculations is the data base used to construct the model. Numerical transport models are limited by the uncertainty of subsurface data and the lack of long-term historical data for calibration. Geochemical models are limited by the lack of thermodynamic data for the temperature ranges applicable to ATES. Model applications undertaken with data collection activities on ATES sites should provide the most important contributions to the understanding and utilization of ATES. Therefore, the primary conclusion of this review is that model application to field sites in conjunction with data collection activities is essential to the development of this technology.

  20. Geostatistical Simulation of Hydrofacies Heterogeneity of the West Thessaly Aquifer Systems in Greece

    SciTech Connect (OSTI)

    Modis, K., E-mail: kmodis@mail.ntua.gr; Sideri, D. [National Technical University of Athens, School of Mining and Metallurgical Engineering (Greece)] [National Technical University of Athens, School of Mining and Metallurgical Engineering (Greece)

    2013-06-15T23:59:59.000Z

    Integrating geological properties, such as relative positions and proportions of different hydrofacies, is of highest importance in order to render realistic geological patterns. Sequential indicator simulation (SIS) and Plurigaussian simulation (PS) are alternative methods for conceptual and deterministic modeling for the characterization of hydrofacies distribution. In this work, we studied the spatial differentiation of hydrofacies in the alluvial aquifer system of West Thessaly basin in Greece. For this, we applied both SIS and PS techniques to an extensive set of borehole data from that basin. Histograms of model versus experimental hydrofacies proportions and indicative cross sections were plotted in order to validate the results. The PS technique was shown to be more effective in reproducing the spatial characteristics of the different hydrofacies and their distribution across the study area. In addition, the permeability differentiations reflected in the PS model are in accordance to known heterogeneities of the aquifer capacity.

  1. THEORETICAL STUDIES IN LONG-TERM THERMAL ENERGY STORAGE IN AQUIFERS

    E-Print Network [OSTI]

    Tsang, C.F.

    2013-01-01T23:59:59.000Z

    Mathematical Modeling of Thermal Energy Storage in Aquifers.of Aquifer Thermal Energy Storage Workshop, Lawrencethe Seasonal Thermal Energy Storage program managed by

  2. SEASONAL THERMAL ENERGY STORAGE IN AQUIFERS-MATHEMATICAL MODELING STUDIES IN 1979

    E-Print Network [OSTI]

    Tsang, Chin Fu

    2013-01-01T23:59:59.000Z

    of Aquifer Thermal Energy Storage." Lawrence BerkeleyP, Andersen, "'rhermal Energy Storage in a Confined Aquifer~University Thermal Energy Storage Experiment." Lawrence

  3. AQUIFER THERMAL ENERGY STORAGE. A NUMERICAL SIMULATION OF AUBURN UNIVERSITY FIELD EXPERIMENTS

    E-Print Network [OSTI]

    Tsang, Chin Fu

    2013-01-01T23:59:59.000Z

    Auburn University Thermal Energy Storage , LBL No. 10194.Mathematical modeling of thermal energy storage in aquifers,of Current Aquifer Thermal Energy Storage Programs (in

  4. SEASONAL THERMAL ENERGY STORAGE IN AQUIFERS-MATHEMATICAL MODELING STUDIES IN 1979

    E-Print Network [OSTI]

    Tsang, Chin Fu

    2013-01-01T23:59:59.000Z

    of Aquifer Thermal Energy Storage." Lawrence Berkeleythe Auburn University Thermal Energy Storage Experiment."LBL~l0208 SEASONAL THERMAL ENERGY STORAGE IN AQUIFERS~

  5. THEORETICAL STUDIES IN LONG-TERM THERMAL ENERGY STORAGE IN AQUIFERS

    E-Print Network [OSTI]

    Tsang, C.F.

    2013-01-01T23:59:59.000Z

    Mathematical Modeling of Thermal Energy Storage in Aquifers.of Aquifer Thermal Energy Storage Workshop, Lawrencewithin the Seasonal Thermal Energy Storage program managed

  6. SEASONAL THERMAL ENERGY STORAGE IN AQUIFERS-MATHEMATICAL MODELING STUDIES IN 1979

    E-Print Network [OSTI]

    Tsang, Chin Fu

    2013-01-01T23:59:59.000Z

    Aspects of Aquifer Thermal Energy Storage." Lawrencethe Auburn University Thermal Energy Storage Experiment."LBL~l0208 SEASONAL THERMAL ENERGY STORAGE IN AQUIFERS~

  7. THEORETICAL STUDIES IN LONG-TERM THERMAL ENERGY STORAGE IN AQUIFERS

    E-Print Network [OSTI]

    Tsang, C.F.

    2013-01-01T23:59:59.000Z

    Mathematical Modeling of Thermal Energy Storage in Aquifers.Proceedings of Aquifer Thermal Energy Storage Workshop,within the Seasonal Thermal Energy Storage program managed

  8. Aquifer Sampling Tube Results for Fiscal Year 2003

    SciTech Connect (OSTI)

    Hartman, Mary J.; Peterson, Robert E.

    2003-10-27T23:59:59.000Z

    This report presents and discusses results of the fiscal year 2003 sampling event associated with aquifer tubes along the Columbia River in the northern Hanford Site. Aquifer tube data help define the extent of groundwater contamination near the river, determine vertical variations in contamination, monitor the performance of interim remedial actions near the river, and support impact studies.

  9. Investigation of Possible Extra ~Recharge During Pumping in Nottinghant .Aquifer

    E-Print Network [OSTI]

    Jiao, Jiu Jimmy

    Investigation of Possible Extra ~Recharge During Pumping in Nottinghant .Aquifer by Jiu J. Jiaoa Abstract Approaches to investigate possible recharge during a pumping test period are demonstrated by analyzing the pumping test data from the Nottingham aquifer, UK. The pumping lasted more than 200 days

  10. Characterizing aquifer heterogeneity using hydraulic tomography

    E-Print Network [OSTI]

    Wachter, Brian James

    2008-07-29T23:59:59.000Z

    such as sands and gravels because these materials drain the water so quickly. The K value is highly localized and only represents the portion of the aquifer in which the core was taken. When working with unconsolidated sediments, care must be taken to pack...?????. .?????.1 17 vi LIST OF FIGURES Figure 1: Map of field site and layout of wells used in study (figure modified from Engard, 2006). Figure 2: MOG setup for tomography study. Figure 3: Packed versus unpacked response in an observation well...

  11. Aquifer thermal energy (heat and chill) storage

    SciTech Connect (OSTI)

    Jenne, E.A. (ed.)

    1992-11-01T23:59:59.000Z

    As part of the 1992 Intersociety Conversion Engineering Conference, held in San Diego, California, August 3--7, 1992, the Seasonal Thermal Energy Storage Program coordinated five sessions dealing specifically with aquifer thermal energy storage technologies (ATES). Researchers from Sweden, The Netherlands, Germany, Switzerland, Denmark, Canada, and the United States presented papers on a variety of ATES related topics. With special permission from the Society of Automotive Engineers, host society for the 1992 IECEC, these papers are being republished here as a standalone summary of ATES technology status. Individual papers are indexed separately.

  12. Method for isolating two aquifers in a single borehole

    DOE Patents [OSTI]

    Burklund, P.W.

    1984-01-20T23:59:59.000Z

    A method for isolating and individually instrumenting separate aquifers within a single borehole is disclosed. A borehole is first drilled from the ground surface, through an upper aquifer, and into a separating confining bed. A casing, having upper and lower sections separated by a coupling collar, is lowered into the borehole. The borehole is grouted in the vicinity of the lower section of the casing. A borehole is then drilled through the grout plug and into a lower aquifer. After the lower aquifer is instrumented, the borehole is grouted back into the lower portion of the casing. Then the upper section of the casing is unscrewed via the coupling collar and removed from the borehole. Finally, instrumentation is added to the upper aquifer and the borehole is appropriately grouted. The coupling collar is designed to have upper right-hand screw threads and lower left-hand screw thread, whereby the sections of the casing can be readily separated.

  13. Geophysical modeling of the Franklin Township buried valley, and associated aquifer, Portage County, Ohio

    SciTech Connect (OSTI)

    Yan, Yuejun; Palmer, D.F. (Kent State Univ., OH (United States). Dept. of Geology)

    1992-01-01T23:59:59.000Z

    A detailed geophysical survey was conducted in Franklin Township, Portage County, Ohio to delineate a buried valley. A combination of the gravity, electrical resistivity, and surface refraction seismic modeling has been applied to determine the bedrock topography, the lithology of the bedrock, the nature of the glacial fill, and the thickness of the associated aquifer. Three dimensional gravity modeling defines the size and shape of the glacial fill with low density compared to the surrounding bedrock and provides a bedrock topography map with a high resolution. The calculated bedrock topography coincides with the water well data available in the area. Resistivity modeling was used to search for a least-squares fit between the measured and the theoretical curves to evaluate the layer thickness and resistivity. The resistivity profile indicates that there exists an aquifer with the thickness about 50 feet within the glacial fill. The level of the soil moisture and the water table is suggested by the resistivity data as well. The seismic profile supports the bedrock boundary calculated by gravity modeling, and shows that the upper part of the bedrock consists of three layers, upper sandstone, shale, and lower sandstone. The comprehensive geophysical interpretation infers that the pre-glacial valley, cut through Sharon Sandstone, Meadville Shale to Berea Sandstone, was extended and deepened at the northern end, and filled with glacial material derived from the north during the later glacial period, resulting in a thick aquifer in the glacial fill.

  14. OPTIMAL GEOLOGICAL ENVIRONMENTS FOR CARBON DIOXIDE DISPOSAL IN SALINE AQUIFERS IN THE UNITED STATES

    SciTech Connect (OSTI)

    Susan D. Hovorka

    1999-02-01T23:59:59.000Z

    Recent research and applications have demonstrated technologically feasible methods, defined costs, and modeled processes needed to sequester carbon dioxide (CO{sub 2}) in saline-water-bearing formations (aquifers). One of the simplifying assumptions used in previous modeling efforts is the effect of real stratigraphic complexity on transport and trapping in saline aquifers. In this study we have developed and applied criteria for characterizing saline aquifers for very long-term sequestration of CO{sub 2}. The purpose of this pilot study is to demonstrate a methodology for optimizing matches between CO{sub 2} sources and nearby saline formations that can be used for sequestration. This project identified 14 geologic properties used to prospect for optimal locations for CO{sub 2} sequestration in saline-water-bearing formations. For this demonstration, we digitized maps showing properties of saline formations and used analytical tools in a geographic information system (GIS) to extract areas that meet variably specified prototype criteria for CO{sub 2} sequestration sites. Through geologic models, realistic aquifer properties such as discontinuous sand-body geometry are determined and can be used to add realistic hydrologic properties to future simulations. This approach facilitates refining the search for a best-fit saline host formation as our understanding of the most effective ways to implement sequestration proceeds. Formations where there has been significant drilling for oil and gas resources as well as extensive characterization of formations for deep-well injection and waste disposal sites can be described in detail. Information to describe formation properties can be inferred from poorly known saline formations using geologic models in a play approach. Resulting data sets are less detailed than in well-described examples but serve as an effective screening tool to identify prospects for more detailed work.

  15. Groundwater nitrates in the Seymour Aquifer: problem or resource? 

    E-Print Network [OSTI]

    Arreola-Triana, Alejandra

    2012-01-01T23:59:59.000Z

    24 tx H2O Fall 2012 Story by Alejandra Arreola-Triana In the Rolling Plains of Texas, the Seymour Aquifer is the major source of water for Haskell, Jones and Knox counties. #31;e water from the Seymour Aquifer, however, contains nitrate levels... are working on ways to manage the nitrate levels in this aquifer. Tracking the source Nitrates in groundwater can come from runo#27;, fertilizer use, leaks from septic tanks, sewage and erosion of natural deposits, according to the U.S. Environmental...

  16. Migration and trapping of CO? in saline aquifers

    E-Print Network [OSTI]

    MacMinn, Christopher William

    2012-01-01T23:59:59.000Z

    Mitigation of climate change requires a reduction in atmospheric carbon dioxide (C0 2) emissions. One promising tool for achieving this is the large-scale injection of CO2 into deep saline aquifers. After injection, upward ...

  17. EXPERIMENTAL AND THEORETICAL STUDIES OF THERMAL ENERGY STORAGE IN AQUIFERS

    E-Print Network [OSTI]

    Tsang, Chin Fu

    2011-01-01T23:59:59.000Z

    1971, storage of Solar Energy in a Bandy- Gravel Ground. 2.Aquifer Storage of Heated Water: A Field Experuuent. GroundStorage of Heated Water: Part II - Numerical Simulation of Field Results. Ground

  18. Simulation analysis of the unconfined aquifer, Raft River Geothermal...

    Open Energy Info (EERE)

    Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Simulation analysis of the unconfined aquifer, Raft River Geothermal Area, Idaho-Utah Abstract This study...

  19. Underground helium travels to the Earth's surface via aquifers...

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

    of South America; it supplies water to more than 15 million people. Scientists found helium pools in this aquifer and is released to the atmosphere when the water reaches the...

  20. Seawater circulation in coastal aquifers : processes and impacts

    E-Print Network [OSTI]

    Karam, Hanan Nadim

    2012-01-01T23:59:59.000Z

    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 ...

  1. aquifer colombia estudio: Topics by E-print Network

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

    availability of ground water and the impact of withdrawals on existing users and the environment Sand-And-Gravel Aquifer Santa; Christopher J. Richards 33 Water temperature as a...

  2. aquifer column studies: Topics by E-print Network

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

    6 Simulation Study of Heat Transportation in an Aquifer about Well-water-source Heat Pump Texas A&M University - TxSpace Summary: The study of groundwater reinjection, pumping...

  3. Analyzing aquifer driven reservoirs using a computer-oriented approach 

    E-Print Network [OSTI]

    Flumerfelt, Raymond William

    1996-01-01T23:59:59.000Z

    A new computer-oriented approach for analyzing aquifer driven reservoirs incorporates both geological and historical pressure data to determine original hydrocarbons-in-place and to forecast production. This new approach does not rely entirely...

  4. On the solute transport in an aquifer-aquitard system 

    E-Print Network [OSTI]

    Bian, Aiguo

    2009-05-15T23:59:59.000Z

    This dissertation is composed of five chapters and three major contributions are presented in Chapter II, III and IV. Chapter I provided a review of studies on solute transport in aquifer-aquitard system. If the aquitard is considered, two...

  5. Reduction of trichloroethylene in a model aquifer with methanotrophic bacteria 

    E-Print Network [OSTI]

    Hicks, Duane Dee

    1990-01-01T23:59:59.000Z

    REDUCTION OF TRICHLOROETHYLENE IN A MODEL AQUIFER WITH METHANOTROPHIC BACTERIA A Thesis by Duane Dee Hicks Submitted to the Office of Graduate Studies of Texas ARM University in partial fullfillment of the requirements for thc degree... of MASTER OF SCIENCE December 1990 Major Subject: Civil Engineering REDUCTION OF TRICHLOROETHYLENE IN A MODEL AQUIFER WITH METHANOTROPHIC BACTEPslA A Thesis by Duane Dec Hicks Approved as to style and content by Bill Batchclor (Chair of Committee...

  6. Methanogens in Central Texas aquifers: a microbiological and molecular study 

    E-Print Network [OSTI]

    MacRae, Martha Jean Davies

    1992-01-01T23:59:59.000Z

    METHANOGENS IN CENTRAL TEXAS AQUIFERS: A MICROBIOLOGICAL AND MOLECULAR STUDY A Thesis by MARTHA JEAN DAVIES MACRAE Submitted to the Office of Graduate Studies of Texas A8cM University in partial fulfillmen of the requirements for the degree... of MASTER OF SCIENCE December 1992 Major Subject: Oceanography METHANOGENS IN CENTRAL TEXAS AQUIFERS: A MICROBIOLOGICAL AND MOLECULAR STUDY A Thesis by MARTHA JEAN DAVIES MACRAE Approved as to style and content by: James W. Ammerman (Chair...

  7. Hydrogeology and groundwater modeling of a Calvert Bluff aquifer 

    E-Print Network [OSTI]

    Lawrence, James

    1989-01-01T23:59:59.000Z

    HYDROGEOLOGY AND GROUNDWATER MODELING OF A CALVERT BLUFF AQUIFER A Thesis by JAMES LAWRENCE Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE... May 1989 Major Subject: Geology HYDROGEOLOGY AND GROUNDWATER MODELING OF A CALVERT BLUFF AQUIFER A Thesis by James Lawrence Approved as to style and content by: Patrick A. Domenico (Chair of Committee) Donald L. Reddell (Member) Robert R...

  8. Application of the decline curve method to aquifers 

    E-Print Network [OSTI]

    Potnis, Girish Vijay

    1992-01-01T23:59:59.000Z

    APPLICATION OF THE DECLINE CURVE METHOD TO AQUIFERS A Thesis by GIRISH VIJAY POTNIS Submitted to the Office of Graduate Studies of Texas ADAM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE December... 1992 Major Subject: Petroleum Engineering APPLICATION OF THE DECLINE CURVE METHOD TO AQUIFERS A Thesis by GIRISH VIJAY POTNIS Approved as to style and content by: Steven W. Poston (Chair of Committee) Thomas . Blasingame (member) James E...

  9. CX-008439: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Modeling Carbon Dioxide Sequestration in Saline Aquifer and Depleted Oil Reservoir (Task 17 - Borehole) CX(s) Applied: A9, B1.13, B3.1, B3.7 Date: 06/26/2012 Location(s): Kansas Offices(s): National Energy Technology Laboratory

  10. FEMA: a Finite Element Model of Material Transport through Aquifers

    SciTech Connect (OSTI)

    Yeh, G.T.; Huff, D.D.

    1985-01-01T23:59:59.000Z

    This report documents the construction, verification, and demonstration of a Finite Element Model of Material Transport through Aquifers (FEMA). The particular features of FEMA are its versatility and flexibility to deal with as many real-world problems as possible. Mechanisms included in FEMA are: carrier fluid advection, hydrodynamic dispersion and molecular diffusion, radioactive decay, sorption, source/sinks, and degradation due to biological, chemical as well as physical processes. Three optional sorption models are embodied in FEMA. These are linear isotherm and Freundlich and Langmuir nonlinear isotherms. Point as well as distributed source/sinks are included to represent artificial injection/withdrawals and natural infiltration of precipitation. All source/sinks can be transient or steady state. Prescribed concentration on the Dirichlet boundary, given gradient on the Neumann boundary segment, and flux at each Cauchy boundary segment can vary independently of each other. The aquifer may consist of as many formations as desired. Either completely confined or completely unconfined or partially confined and partially unconfined aquifers can be dealt with effectively. FEMA also includes transient leakage to or from the aquifer of interest through confining beds from or to aquifers lying below and/or above.

  11. Analysis of Sweet Lake geopressured-geothermal aquifer

    SciTech Connect (OSTI)

    Andrade, M.; Rago, F.; Ohkuma, H.; Sepehrnoori, K.; Peters, E.; Dorfman, M.

    1982-01-01T23:59:59.000Z

    The Sweet Lake geopressured-geothermal aquifer, located southeast of Lake Charles, Louisiana, is modeled by a two-dimensional geopressured-geothermal simulator. This aquifer is a sandstone within the Frio formation at depths between 15,000 to 15,640 ft with a net porous thickness of 250 ft, a calculated in-situ permeability (from drawdown data) of 17 md, an estimated porosity of 24%, a uniaxial compaction coefficient of 4.5 x 10/sup -7/ psi/sup -1/ and a solution gas-water ratio of 11 SCF/STB all at the initial reservoir pressure of 12,060 psi. These parameters are typically pressure sensitive in geopressured-geothermal aquifers and are critically important to aquifer performance. Several simulation experiments are conducted which investigate the effects of varying initial values for these parameters with the experimentally determined values as means. The simulations give both optimistic and pessimistic expectations for aquifer performance. The expected life of the geopressured-geothermal well is reported for each simulation.

  12. Multivariate analysis of cross-hole georadar velocity and attenuation tomograms for aquifer zonation

    E-Print Network [OSTI]

    Barrash, Warren

    for characterizing heterogeneous alluvial aquifers. A multivariate statistical technique, known as k-means cluster in a well-studied alluvial aquifer. A comparison of the clustered tomographic section with well-log data

  13. A simulation model for generation of aquifer characteristics and contaminant concentrations

    E-Print Network [OSTI]

    Deena, Jayaram

    1993-01-01T23:59:59.000Z

    simulation model was developed to generate aquifer characteristics such as hydraulic conductivity, porosity and organic carbon content. The variability of aquifer characteristics is represented by the fields generated using the simulation model. Random...

  14. Geochemical modeling of an aquifer storage and recovery project in Union County, Arkansas

    E-Print Network [OSTI]

    Zhu, Ni, M. Eng. Massachusetts Institute of Technology

    2013-01-01T23:59:59.000Z

    The Sparta aquifer in Union County, Arkansas has served as an important potable water supply to the public and industrial sectors in the area. However, increasing water demand and sustained heavy pumping from the aquifer ...

  15. Estimation of Recharge to the Middle Trinity Aquifer of Central Texas Using Water-Level Fluctuations

    E-Print Network [OSTI]

    Jennings, Marshall; Chad, Thomas; Burch, John; Creutzburg, Brian; Lambert, Lance

    to the aquifer for 1999 and 2000. As part of the investigation, the Edwards Aquifer Research & Data Center (EARDC) staff worked with the Texas Water Development Board (TWDB) and local groundwater conservation districts to install five new recording well monitors...

  16. Modeling the High Plains Aquifer's Response to Land Use and Climate Change

    E-Print Network [OSTI]

    Dermyer, Reuben

    2011-06-14T23:59:59.000Z

    The High Plains Aquifer is extremely important to the economic life of Kansas and the surrounding states, but water is being withdrawn from the aquifer much faster than it is being recharged. Due to the importance of ...

  17. A Farm-Level Evaluation of Agricultural Profit and Ground Water Quality: Texas Seymour Aquifer 

    E-Print Network [OSTI]

    Chowdhury, Manzoor; Lacewell, Ronald D.; McCarl, Bruce A.; Ozuna, Teofilo Jr.; Benson, Verel W.; Harris, Billy L.; Dyke, Paul T.

    1994-01-01T23:59:59.000Z

    The Seymour Aquifer of north-central Texas is known to have elevated levels of nitrates. The design of economically sound policies for reducing agriculture's nitrate contribution to the aquifer suggests a need to evaluate alternative management...

  18. A simulation model for generation of aquifer characteristics and contaminant concentrations 

    E-Print Network [OSTI]

    Deena, Jayaram

    1993-01-01T23:59:59.000Z

    Remediation of natural systems such as aquifers requires a thorough characterization of its physical and hydraulic properties. Variability in physical and hydraulic properties of aquifers makes design and operation of suitable remediation process...

  19. AQUIFER THERMAL ENERGY STORAGE. A NUMERICAL SIMULATION OF AUBURN UNIVERSITY FIELD EXPERIMENTS

    E-Print Network [OSTI]

    Tsang, Chin Fu

    2013-01-01T23:59:59.000Z

    C.F. , 1980, "Aquifer Thermal Energy - Parameter Study" (infrom the Auburn University Thermal Energy Storage , LBL No.studies in aquifer thermal energy , Presented at the ~~~~~~~

  20. Hydraulics of horizontal wells in fractured shallow aquifer systems Eungyu Parka,*, Hongbin Zhanb

    E-Print Network [OSTI]

    Zhan, Hongbin

    Hydraulics of horizontal wells in fractured shallow aquifer systems Eungyu Parka,*, Hongbin Zhanb Accepted 1 May 2003 Abstract An analysis of groundwater hydraulic head in the vicinity of a horizontal well in fractured or porous aquifers considering confined, leaky confined, and water-table aquifer boundary

  1. Singlehole GPR reflection imaging of solute transport in a granitic aquifer

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Singlehole GPR reflection imaging of solute transport in a granitic aquifer Caroline Dorn,1 Niklas mmaperture fractures. A dipole tracer test was performed in a granitic aquifer by injecting a saline solution of solute transport in a granitic aquifer, Geophys. Res. Lett., 38, L08401, doi:10.1029/ 2011GL047152. 1

  2. Saving for dry days: Aquifer storage and recovery may help

    E-Print Network [OSTI]

    Wythe, Kathy

    2008-01-01T23:59:59.000Z

    underground storage (MUS) of recoverable water. The Committee on Sustainable Underground Storage of Recoverable Water uses MUS ?to denote purposeful recharge of water into an aquifer system for intended recovery and use as an element of long-term water...tx H2O | pg. 2 Saving for dry days Story by Kathy Wythe tx H2O | pg. 3 Aquifer storage and recovery may help With reoccurring droughts and growing population, Texas will always be looking for better ways to save or use water. Some water...

  3. Legal and regulatory issues affecting aquifer thermal energy storage

    SciTech Connect (OSTI)

    Hendrickson, P.L.

    1981-10-01T23:59:59.000Z

    This document updates and expands the report with a similar title issued in October 1980. This document examines a number of legal and regulatory issues that potentially can affect implementation of the aquifer thermal energy storage (ATES) concept. This concept involves the storage of thermal energy in an underground aquifer until a later date when it can be effectively utilized. Either heat energy or chill can be stored. Potential end uses of the energy include district space heating and cooling, industrial process applications, and use in agriculture or aquaculture. Issues are examined in four categories: regulatory requirements, property rights, potential liability, and issues related to heat or chill delivery.

  4. Saving for dry days: Aquifer storage and recovery may help 

    E-Print Network [OSTI]

    Wythe, Kathy

    2008-01-01T23:59:59.000Z

    tx H2O | pg. 2 Saving for dry days Story by Kathy Wythe tx H2O | pg. 3 Aquifer storage and recovery may help With reoccurring droughts and growing population, Texas will always be looking for better ways to save or use water. Some water... suppliers in Texas are turning to aquifer storage and recovery. During the dry summer of 2008, the San Antonio Water System (SAWS) had enough assets in its ?bank? (of water) to make with- drawals to meet the needs of its customers. The water bank...

  5. Determining the Fate of Herbicides in the Ogallala Aquifer

    E-Print Network [OSTI]

    Schneider, A. D.; Wiese, A. F.; Jones, O. R.; Mathers, A. C.

    1971-01-01T23:59:59.000Z

    8-1 1 12 August 1971 termining The Fate of Herbicides in the Ogallala Aquifer Fine textured soils "., ..'. ::: .::::.. a ...... Sandy rolls .. .... - [ Little or no water O Miles 100 U in Ogalla la formation Sand dunes -c Texas ABM... indicate that a dual-porpo+e "" in a sand aquifer that is accidentally contamin~r " by herbicides will not be a serious hazard if the '" l (1 is pumped soon after recharging. Since dual-purr. . wells are normally used for seasonal recharpinr I...

  6. Stochastic estimation of aquifer geometry using seismic refraction data with borehole depth constraints

    SciTech Connect (OSTI)

    Chen, Jinsong [Lawrence Berkeley National Laboratory (LBNL); Hubbard, Susan S [Lawrence Berkeley National Laboratory (LBNL); Korneev, V. [Lawrence Berkeley National Laboratory (LBNL); Gaines, David [University of Tennessee; Baker, Gregory S. [University of Tennessee; Watson, David [ORNL

    2010-11-01T23:59:59.000Z

    We develop a Bayesian model to invert surface seismic refraction data with depth constraints from boreholes for characterization of aquifer geometry and apply it to seismic and borehole data sets collected at the contaminated Oak Ridge National Laboratory site in Tennessee. Rather than the traditional approach of first inverting the seismic arrival times for seismic velocity and then using that information to aid in the spatial interpolation of wellbore data, we jointly invert seismic first arrival time data and wellbore based information, such as depths of key lithological boundaries. We use a staggered grid finite difference algorithm with second order accuracy in time and fourth order accuracy in space to model seismic full waveforms and use an automated method to pick the first arrival times. We use Markov Chain Monte Carlo methods to draw many samples from the joint posterior probability distribution, on which we can estimate the key interfaces and their associated uncertainty as a function of horizontal location and depth. We test the developed method on both synthetic and field case studies. The synthetic studies show that the developed method is effective at rigorous incorporation of multiscale data and the Bayesian inversion reduces uncertainty in estimates of aquifer zonation. Applications of the approach to field data, including two surface seismic profiles located 620 m apart from each other, reveal the presence of a low velocity subsurface zone that is laterally persistent. This geophysically defined feature is aligned with the plume axis, suggesting it may serve as an important regional preferential flow pathway.

  7. Applications of Ensemble-based Data Assimilation Techniques for Aquifer Characterization using Tracer Data at Hanford 300 Area

    SciTech Connect (OSTI)

    Chen, Xingyuan; Hammond, Glenn E.; Murray, Christopher J.; Rockhold, Mark L.; Vermeul, Vincent R.; Zachara, John M.

    2013-10-31T23:59:59.000Z

    Subsurface aquifer characterization often involves high parameter dimensionality and requires tremendous computational resources if employing a full Bayesian approach. Ensemble-based data assimilation techniques, including filtering and smoothing, are computationally efficient alternatives. Despite the increasing number of applications of ensemble-based methods in assimilating flow and transport related data for subsurface aquifer charaterization, most are limited to either synthetic studies or two-dimensional problems. In this study, we applied ensemble-based techniques for assimilating field tracer experimental data obtained from the Integrated Field Research Challenge (IFRC) site at the Hanford 300 Area. The forward problem was simulated using the massively-parallel three-dimensional flow and transport code PFLOTRAN to effectively deal with the highly transient flow boundary conditions at the site and to meet the computational demands of ensemble-based methods. This study demonstrates the effectiveness of ensemble-based methods for characterizing a heterogeneous aquifer by sequentially assimilating multiple types of data. The necessity of employing high performance computing is shown to enable increasingly mechanistic non-linear forward simulations to be performed within the data assimilation framework for a complex system with reasonable turnaround time.

  8. Comparing Approaches to Locating Boreholes in Spatially Heterogeneous Aquifers Sean A. McKenna, Sandia National Laboratories, Albuquerque, New Mexico

    E-Print Network [OSTI]

    Kenna, Sandia National Laboratories, Albuquerque, New Mexico Abstract Limited sampling of an aquifer

  9. Investigating cross-contamination of aquifers Paul M. Santi John E. McCray Jamie L. Martens

    E-Print Network [OSTI]

    Investigating cross-contamination of aquifers Paul M. Santi · John E. McCray · Jamie L. Martens Abstract Shallow aquifers can cross-contaminate deeper aquifers through penetration of an intervening of several of these techniques at three sites ex- periencing aquifer cross-contamination, the authors con

  10. Economic and Hydrologic Implications of Proposed Edwards Aquifer Management Plans

    E-Print Network [OSTI]

    Dillon, Carl R.; Jones, Lonnie L.; Williams, R. Lynn; Jordan, Wayne R.; McCarl, Bruce A.

    on water elevation in a reference well located in San Antonio. Four variants of the plans were analyzed using an annual economic/hydrologic simulation model of the aquifer. The model simulates water use by the agricultural, industrial and municipal sectors...

  11. AUTOMATED WATER LEVEL MEASUREMENTS IN SMALL-DIAMETER AQUIFER TUBES

    SciTech Connect (OSTI)

    PETERSEN SW; EDRINGTON RS; MAHOOD RO; VANMIDDLESWORTH PE

    2011-01-14T23:59:59.000Z

    Groundwater contaminated with hexavalent chromium, strontium-90, and uranium discharges into the Columbia River along approximately 16 km (10 mi) of the shoreline. Various treatment systems have and will continue to be implemented to eliminate the impact of Hanford Site contamination to the river. To optimize the various remediation strategies, it is important to understand interactions between groundwater and the surface water of the Columbia River. An automated system to record water levels in aquifer sampling tubes installed in the hyporheic zone was designed and tested to (1) gain a more complete understanding of groundwater/river water interactions based on gaining and losing conditions ofthe Columbia River, (2) record and interpret data for consistent and defensible groundwater/surface water conceptual models that may be used to better predict subsurface contaminant fate and transport, and (3) evaluate the hydrodynamic influence of extraction wells in an expanded pump-and-treat system to optimize the treatment system. A system to measure water levels in small-diameter aquifer tubes was designed and tested in the laboratory and field. The system was configured to allow manual measurements to periodically calibrate the instrument and to permit aquifer tube sampling without removing the transducer tube. Manual measurements were collected with an e-tape designed and fabricated especially for this test. Results indicate that the transducer system accurately records groundwater levels in aquifer tubes. These data are being used to refine the conceptual and numeric models to better understand interactions in the hyporheic zone of the Columbia River and the adjacent river water and groundwater, and changes in hydrochemistry relative to groundwater flux as river water recharges the aquifer and then drains back out in response to changes in the river level.

  12. Descriptive analysis of aquifer thermal energy storage systems

    SciTech Connect (OSTI)

    Reilly, R.W.

    1980-06-01T23:59:59.000Z

    The technical and economic feasibility of large-scale aquifer thermal energy storage (ATES) was examined. A key to ATESs attractiveness is its simplicity of design and construction. The storage device consists of two ordinary water wells drilled into an aquifer, connected at the surface by piping and a heat exchanger. During the storage cycle water is pumped out of the aquifer, through the heat exchanger to absorb thermal energy, and then back down into the aquifer through the second well. The thermal storage remains in the aquifer storage bubble until required for use, when it is recovered by reversing the storage operation. For many applications the installation can probably be designed and constructed using existing site-specific information and modern well-drilling techniques. The potential for cost-effective implementation of ATES was investigated in the Twin Cities District Heating-Cogeneration Study in Minnesota. In the study, ATES demonstrated a net energy saving of 32% over the nonstorage scenario, with an annual energy cost saving of $31 million. Discounting these savings over the life of the project, the authors found that the break-even capital cost for ATES construction was $76/kW thermal, far above the estimated ATES development cost of $23 to 50/kW thermal. It appears tht ATES can be highly cost effective as well as achieve substantial fuel savings. ATES would be environmentally beneficial and could be used in many parts of the USA. The existing body of information on ATES indicates that it is a cost-effective, fuel-conserving technique for providing thermal energy for residential, commercial, and industrial users. The negative aspects are minor and highly site-specific, and do not seem to pose a threat to widespread commercialization. With a suitable institutional framework, ATES promises to supply a substantial portion of the nation's future energy needs. (LCL)

  13. Hydrogeophysical methods for analyzing aquifer storage and recovery systems

    SciTech Connect (OSTI)

    Minsley, B.J.; Ajo-Franklin, J.; Mukhopadhyay, A.; Morgan, F.D.

    2009-12-01T23:59:59.000Z

    Hydrogeophysical methods are presented that support the siting and monitoring of aquifer storage and recovery (ASR) systems. These methods are presented as numerical simulations in the context of a proposed ASR experiment in Kuwait, although the techniques are applicable to numerous ASR projects. Bulk geophysical properties are calculated directly from ASR flow and solute transport simulations using standard petrophysical relationships and are used to simulate the dynamic geophysical response to ASR. This strategy provides a quantitative framework for determining site-specific geophysical methods and data acquisition geometries that can provide the most useful information about the ASR implementation. An axisymmetric, coupled fluid flow and solute transport model simulates injection, storage, and withdrawal of fresh water (salinity {approx}500 ppm) into the Dammam aquifer, a tertiary carbonate formation with native salinity approximately 6000 ppm. Sensitivity of the flow simulations to the correlation length of aquifer heterogeneity, aquifer dispersivity, and hydraulic permeability of the confining layer are investigated. The geophysical response using electrical resistivity, time-domain electromagnetic (TEM), and seismic methods is computed at regular intervals during the ASR simulation to investigate the sensitivity of these different techniques to changes in subsurface properties. For the electrical and electromagnetic methods, fluid electric conductivity is derived from the modeled salinity and is combined with an assumed porosity model to compute a bulk electrical resistivity structure. The seismic response is computed from the porosity model and changes in effective stress due to fluid pressure variations during injection/recovery, while changes in fluid properties are introduced through Gassmann fluid substitution.

  14. Modeling of thermal energy storage in groundwater aquifers

    E-Print Network [OSTI]

    Reed, David Bryan

    1979-01-01T23:59:59.000Z

    , nuclear fission, fusion, geo- thermal energy, and solar energy as potential alternate energy sources to replace natural gas and oil. Of these, soIar energy is one of the most promisino alternate energy sources for space heating and cooling. Solar...MODELING OF THERMAL ENERGY STORAGE IN GROUNDWATER AQUIFERS A Thesis by DAVID BRYAN REED Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE December 1979...

  15. Geothermal development of the Madison group aquifer: a case study

    SciTech Connect (OSTI)

    Martinez, J.A.

    1981-01-01T23:59:59.000Z

    A geothermal well has been drilled at the St. Mary's Hospital in Pierre, South Dakota. The well is 2176 feet deep and artesian flows 375 gpm at 106/sup 0/F. The well is producing fluids from the Mississippian Madison Group, a sequence of carbonate rocks deposited over several western states. The project was funded to demonstrate the goethermal potential of this widespread aquifer. This case study describes the development of the project through geology, drilling, stimulation, and testing.

  16. Methanogens in Central Texas aquifers: a microbiological and molecular study

    E-Print Network [OSTI]

    MacRae, Martha Jean Davies

    1992-01-01T23:59:59.000Z

    ) to determine if lithology and water characteristics favor one type of bacteria over another, 3) to determine if viable methanogens are present in the sampled aquifers; and 4) to determine if the abundance of biogenic methane correlates with the presence... flow filtration to recover viruses and dissolved DNA from eutrophic and oligotrophic seawater. Jiang et aL (44) also utilized vortex flow filtration to concentrate particulate DNA, chlorophyll a, and bacteria from fresh water, estuarine, coastal...

  17. Relationship of regional water quality to aquifer thermal energy storage

    SciTech Connect (OSTI)

    Allen, R.D.

    1983-11-01T23:59:59.000Z

    Ground-water quality and associated geologic characteristics may affect the feasibility of aquifer thermal energy storage (ATES) system development in any hydrologic region. This study sought to determine the relationship between ground-water quality parameters and the regional potential for ATES system development. Information was collected from available literature to identify chemical and physical mechanisms that could adversely affect an ATES system. Appropriate beneficiation techniques to counter these potential geochemical and lithologic problems were also identified through the literature search. Regional hydrology summaries and other sources were used in reviewing aquifers of 19 drainage regions in the US to determine generic geochemical characteristics for analysis. Numerical modeling techniques were used to perform geochemical analyses of water quality from 67 selected aquifers. Candidate water resources regions were then identified for exploration and development of ATES. This study identified six principal mechanisms by which ATES reservoir permeability may be impaired: (1) particulate plugging, (2) chemical precipitation, (3) liquid-solid reactions, (4) formation disaggregation, (5) oxidation reactions, and (6) biological activity. Specific proven countermeasures to reduce or eliminate these effects were found. Of the hydrologic regions reviewed, 10 were identified as having the characteristics necessary for ATES development: (1) Mid-Atlantic, (2) South-Atlantic Gulf, (3) Ohio, (4) Upper Mississippi, (5) Lower Mississippi, (6) Souris-Red-Rainy, (7) Missouri Basin, (8) Arkansas-White-Red, (9) Texas-Gulf, and (10) California.

  18. Large-scale impact of CO2 storage in deep saline aquifers: A sensitivity study on pressure response in stratified systems

    E-Print Network [OSTI]

    Birkholzer, J.T.

    2008-01-01T23:59:59.000Z

    aquifer near the ground surface to the storage formation.below the ground surface. The storage formation is boundedstorage formation, and Aquifer 8 the uppermost aquifer nearest to the ground

  19. Effect of sediment concentration on artificial well recharge in a fine sand aquifer

    E-Print Network [OSTI]

    Rahman, Mohammed Ataur

    1968-01-01T23:59:59.000Z

    of the aquifer and also the shape of the water profile in the model aquifer during the period of recharge. CHAPTER II REVIEW OF LITERATURE The flow of water through porous materials follows a law first discovered experimentally in 1856 by Henri Darcy (12), a... WITH TAP WATER AND SEDIMENT-LADEN WATER 74 76 77 Appendix AVERAGE CONDUCTIVITY IN ONE FOOT SECTIONS OF THE AQUIFER 84 LIST OF FIGURES Figure Page 3-1 Model Recharge Well with Accessori. es 14 3-2 Pie-shaped Model Well and Aquifer Sector Viewed...

  20. Sensitivity analysis of aquifer parameter estimations based on the Laplace equation with linearized boundary conditions

    E-Print Network [OSTI]

    Szilagyi, Jozsef

    boundary conditions Jozsef Szilagyi Conservation and Survey Division, University of Nebraska analysis Citation: Szilagyi, J., Sensitivity analysis of aquifer parameter estimations based on the Laplace

  1. BPA, electric co-op and irrigation district testing aquifer recharge

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

    electric co-op and irrigation district testing aquifer recharge Dispatching recharge pumping could save money and relieve electricity oversupply Portland, Ore. - The Bonneville...

  2. Subsurface Biogeochemical Heterogeneity (Field-scale removal of U(VI) from groundwater in an alluvial aquifer by electron donor amendment)

    SciTech Connect (OSTI)

    Long, Philip E.; Derek R. Lovley; A. L. N’Guessan; Kelly Nevin; C. T. Resch; Evan Arntzen; Jenny Druhan; Aaron Peacock; Brett Baldwin; Dick Dayvault; Dawn Holmes; Ken Williams; Susan Hubbard; Steve Yabusaki; Yilin Fang; D.C. White; John Komlos; Peter Jaffe

    2006-06-01T23:59:59.000Z

    Determine if biostimulation of alluvial aquifers by electron donor amendment can effectively remove U(VI) from groundwater at the field scale. Uranium contamination in groundwater is a significant problem at several DOE sites. In this project, the possibility of accelerating bioreduction of U(VI) to U(IV) as a means of decreasing U(VI) concentrations in groundwater is directly addressed by conducting a series of field-scale experiments. Scientific goals include demonstrating the quantitative linkage between microbial activity and U loss from groundwater and relating the dominant terminal electron accepting processes to the rate of U loss. The project is currently focused on understanding the mechanisms for unexpected long-term ({approx}2 years) removal of U after stopping electron donor amendment. Results obtained in the project successfully position DOE and others to apply biostimulation broadly to U contamination in alluvial aquifers.

  3. Critical analysis of plume containment modeling in a thin heterogeneous unconfined aquifer: application to a bulk fuel storage terminal

    E-Print Network [OSTI]

    Mejia, Karl Edward

    1997-01-01T23:59:59.000Z

    The reported hydrocarbon contamination and subsequent consultant work at a bulk fuel storage terminal has instigated the need to critically analyze modeling techniques in thin, heterogeneous, unconfined aquifers. This study provides an aquifer...

  4. Improving land-surface model hydrology: Is an explicit aquifer model better than a deeper soil profile?

    E-Print Network [OSTI]

    2007-01-01T23:59:59.000Z

    land-surface model hydrology: Is an explicit aquifer modelAL. : LAND-SURFACE MODEL HYDROLOGY Changnon, S. , et al. (land-surface model hydrology: Is an explicit aquifer model

  5. Interactions and Implications of a Collector Well with a River in an Unconfined Aquifer with Regional Background Flow

    E-Print Network [OSTI]

    Dugat, William D., IV

    2010-01-14T23:59:59.000Z

    the petroleum industry and hydrologic sciences. This study improved the understanding of the interaction of collector wells and the aquifers/reservoirs they tap by numerically modeling flux exchanges between a collector well and a river in an unconfined aquifer...

  6. Stream aquifer interactions: analytical solution to estimate stream depletions caused by stream stage fluctuations and pumping wells near streams

    E-Print Network [OSTI]

    Intaraprasong, Trin

    2009-05-15T23:59:59.000Z

    This dissertation is composed of three parts of contributions. Systems of a fully penetrating pumping well in a confined aquifer near a fully penetrating stream with and without streambeds are discussed in Chapter II. In Chapter III, stream-aquifer...

  7. Critical analysis of plume containment modeling in a thin heterogeneous unconfined aquifer: application to a bulk fuel storage terminal 

    E-Print Network [OSTI]

    Mejia, Karl Edward

    1997-01-01T23:59:59.000Z

    The reported hydrocarbon contamination and subsequent consultant work at a bulk fuel storage terminal has instigated the need to critically analyze modeling techniques in thin, heterogeneous, unconfined aquifers. This study provides an aquifer...

  8. Stream aquifer interactions: analytical solution to estimate stream depletions caused by stream stage fluctuations and pumping wells near streams 

    E-Print Network [OSTI]

    Intaraprasong, Trin

    2009-05-15T23:59:59.000Z

    This dissertation is composed of three parts of contributions. Systems of a fully penetrating pumping well in a confined aquifer near a fully penetrating stream with and without streambeds are discussed in Chapter II. In Chapter III, stream-aquifer...

  9. Barriers to water marketing: opinions of major pumpers on water marketing issues in the Edwards Aquifer region 

    E-Print Network [OSTI]

    Phillips, Laura Maureen

    1996-01-01T23:59:59.000Z

    Groundwater use is a contentious issue in the Edwards Aquifer region of Texas. Many environmentalists are advocating groundwater law reform, much to the chagrin of property rights advocates. Establishment of tighter controls in the Edwards Aquifer...

  10. Interactions and Implications of a Collector Well with a River in an Unconfined Aquifer with Regional Background Flow 

    E-Print Network [OSTI]

    Dugat, William D., IV

    2010-01-14T23:59:59.000Z

    the petroleum industry and hydrologic sciences. This study improved the understanding of the interaction of collector wells and the aquifers/reservoirs they tap by numerically modeling flux exchanges between a collector well and a river in an unconfined aquifer...

  11. Storage capacity and injection rate estimates for CO? sequestration in deep saline aquifers in the conterminous United States

    E-Print Network [OSTI]

    Szulczewski, Michael Lawrence

    2009-01-01T23:59:59.000Z

    A promising method to mitigate global warming is injecting CO? into deep saline aquifers. In order to ensure the safety of this method, it is necessary to understand how much CO? can be injected into an aquifer and at what ...

  12. Potential Risks of Freshwater Aquifer Contamination with Geosequestration

    SciTech Connect (OSTI)

    Jackson, Robert

    2013-09-30T23:59:59.000Z

    Substantial leakage of CO{sub 2} from deep geological strata to shallow potable aquifers is likely to be rare, but chemical detection of potential leakage nonetheless remains an integral component of any safe carbon capture and storage system. CO{sub 2} that infiltrates an unconfined freshwater aquifer will have an immediate impact on water chemistry by lowering pH in most cases and by altering the concentration of total dissolved solids. Chemical signatures in affected waters provide an important opportunity for early detection of leaks. In the presence of CO{sub 2}, trace elements such as Mn, Fe, and Ca can increase by an order of magnitude or more above control concentrations within 100 days. Therefore, these and other elements should be monitored along with pH as geochemical markers of potential CO{sub 2} leaks. Dissolved inorganic carbon and alkalinity can also be rapidly responsive to CO{sub 2} and are stable indicators of a leak. Importantly, such changes may be detectable long before direct changes in CO{sub 2} are observed. The experimental results also suggest that the relative severity of the impact of leaks on overlying drinking-water aquifers should be considered in the selection of CO{sub 2} sequestration sites. One primary selection criteria should be metal and metalloid availability, such as uranium and arsenic abundance, to carefully monitor chemical species that could trigger changes above maximum contaminant levels (MCLs). Overall, the risks of leakage from underground CO{sub 2} storage are real but appear to be manageable if systems are closely monitored.

  13. Effect of permeability anisotropy on buoyancy-driven flow for CO2 sequestration in saline aquifers

    E-Print Network [OSTI]

    Firoozabadi, Abbas

    ) in deep saline aquifers is considered one of the most effective methods for carbon sequestration., 48, W09539, doi:10.1029/2012WR011939.* 1. Introduction [2] Carbon sequestration in deep salineEffect of permeability anisotropy on buoyancy-driven flow for CO2 sequestration in saline aquifers

  14. Regional assessment of aquifers for thermal-energy storage. Volume 3. Appendices

    SciTech Connect (OSTI)

    Not Available

    1981-06-01T23:59:59.000Z

    This volume contains two appendices to the main report. The first lists the aquifers in the 12 geographic regions of the USA and characterizes each as containing sands and gravels or limestones or volcanic rock. The second appendix tabulates the hydrologic characteristics of each aquifer. (LCL)

  15. Regional assessment of aquifers for thermal-energy storage. Volume 2. Regions 7 through 12

    SciTech Connect (OSTI)

    Not Available

    1981-06-01T23:59:59.000Z

    This volume contains information on the geologic and hydrologic framework, major aquifers, aquifers which are suitable and unsuitable for annual thermal energy storage (ATES) and the ATES potential of the following regions of the US: Unglaciated Central Region; Glaciated Appalachians, Unglaciated Appalachians; Coastal Plain; Hawaii; and Alaska. (LCL)

  16. Regional assessment of aquifers for thermal energy storage. Volume 1. Regions 1 through 6

    SciTech Connect (OSTI)

    Not Available

    1981-06-01T23:59:59.000Z

    This volume contains information on the geologic and hydrologic framework, major aquifers, aquifers which are suitable and unsuitable for annual thermal energy storage (ATES) and the ATES potential of the following regions of the US: the Western Mountains; Alluvial Basins; Columbia LAVA Plateau; Colorado Plateau; High Plains; and Glaciated Central Region. (LCL)

  17. The Influence of Topology on Hydraulic Conductivity in a Sand-and-Gravel Aquifer

    E-Print Network [OSTI]

    The Influence of Topology on Hydraulic Conductivity in a Sand-and-Gravel Aquifer by Roger H. Morin1 and tracer testing was conducted in a single well that penetrated a sand-and-gravel aquifer at the U, and tortuosity that primarily control the hydraulic conductivity. Results show that F correlates well with K

  18. Spreading and convective dissolution of carbon dioxide in vertically confined, horizontal aquifers

    E-Print Network [OSTI]

    Huppert, Herbert

    Spreading and convective dissolution of carbon dioxide in vertically confined, horizontal aquifers of carbon dioxide (CO2) into saline aquifers is a promising tool for reducing anthropogenic CO2 emissions. At reservoir conditions, the injected CO2 is buoyant relative to the ambient groundwater. The buoyant plume

  19. 1 Estimating aquifer hydraulic properties from the inversion of surface 2 Streaming Potential (SP) anomalies

    E-Print Network [OSTI]

    Sailhac, Pascal

    1 Estimating aquifer hydraulic properties from the inversion of surface 2 Streaming Potential (SP with the geometry of the water table. It follows that 11 SP measurements can be used to estimate aquifer hydraulic and found that we 14 are able to estimate the hydraulic conductivity and the depth 15 and the thickness

  20. Information content of slug tests for estimating hydraulic properties in realistic, high-conductivity aquifer scenarios

    E-Print Network [OSTI]

    Barrash, Warren

    Information content of slug tests for estimating hydraulic properties in realistic, high for partially-penetrating slug tests in unconfined aquifers (Malama et al., in press) provides a semi the ultimate goal of determining aquifer properties such as hydraulic conductivity K and specific storage Ss

  1. Characterizing Hydraulic Properties and Ground-Water Chemistry in Fractured-Rock Aquifers: A User's Manual

    E-Print Network [OSTI]

    Characterizing Hydraulic Properties and Ground-Water Chemistry in Fractured-Rock Aquifers: A User source for science about the Earth, its natural and living resources, natural hazards., 2007, Characterizing hydraulic properties and ground-water chemistry in fractured-rock aquifers: A user

  2. Limiting Pumping from the Edwards Aquifer: An Economic Investigation of Proposals, Water Markets and Springflow Guarantees

    E-Print Network [OSTI]

    McCarl, Bruce A.

    Limiting Pumping from the Edwards Aquifer: An Economic Investigation of Proposals, Water Markets for pumping and springflow which in turn provides water for recreation and habitat for several endangered species. A management authority is charged with aquifer management and is mandated to reduce pumping

  3. Measuring The Effectiveness of Groundwater Management Policies for the Carrizo-Wilcox Aquifer of Texas 

    E-Print Network [OSTI]

    Gamache, Kevin Robert

    2014-11-03T23:59:59.000Z

    rate of decline in groundwater levels in the Carrizo-Wilcox Aquifer in Texas after establishment of a GCD. The data did not show a correlation between the water allocation method used and the impact on average annual drawdown of the aquifer. The study...

  4. A Fractal Interpretation of Controlled-Source Helicopter Electromagnetic Survey Data Seco Creek, Edwards Aquifer, TX 

    E-Print Network [OSTI]

    Decker, Kathryn T.

    2010-07-14T23:59:59.000Z

    The Edwards aquifer lies in the structurally complex Balcones fault zone and supplies water to the growing city of San Antonio. To ensure that future demands for water are met, the hydrological and geophysical properties of the aquifer must be well...

  5. Aquifer operator scaling and the effect on solute mixing and dispersion

    E-Print Network [OSTI]

    Bäumer, Boris

    Aquifer operator scaling and the effect on solute mixing and dispersion David A. Benson Geology settings. Most previous models have used isotropic scaling characterized by a single scalar Hurst, are associated with thicker layering of aquifer sediments and more preferential, unmixed transport. Therefore

  6. Determining the Fate of Herbicides in the Ogallala Aquifer.

    E-Print Network [OSTI]

    Schneider, A. D.; Wiese, A. F.; Jones, O. R.; Mathers, A. C.

    1971-01-01T23:59:59.000Z

    Aquifer A. D. SCHNEIDER, A. F. WIESE, 0. R. JONES AND A. C. M.~THERS* 11 , I jvi~i\\ \\~!~llI~llR~ ARE RECHARGED by nat~~ral or arti- ,, , iiti;~l jlrocesses, they may receive runoff from [I. , :iillltar;~l lands. In the Texas High Plains, dual- [, rp..., if needed. Nitrate and nitrite were cleterminetl by tl,c ,i~ mated, colormetric procedures of Kamphake, H.II~I~ - and Cohen (5). Herbicides in the water samples were dete~~ll~~ with a Barber-Coleman Moclel 5360 gas chromatoy equipped with a radium 226...

  7. Application of the decline curve method to aquifers

    E-Print Network [OSTI]

    Potnis, Girish Vijay

    1992-01-01T23:59:59.000Z

    k = value of pointin time = value of point in time n = value of point in time 39 REFERENCES 1. Fetkovich, M. J. : "Decline Curve Analysis Using Type Curves, " JPT (June 1980) 1065-1077. 2. Havlena, D. and Odeh, A. S. : "The Material Balance...APPLICATION OF THE DECLINE CURVE METHOD TO AQUIFERS A Thesis by GIRISH VIJAY POTNIS Submitted to the Office of Graduate Studies of Texas ADAM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE December...

  8. Groundwater nitrates in the Seymour Aquifer: problem or resource?

    E-Print Network [OSTI]

    Arreola-Triana, Alejandra

    2012-01-01T23:59:59.000Z

    in the Groundwater nitrates in the Seymour Aquifer: problem or resource? Texas High Plains and Rolling Plain project. #31;e aim of this project is to understand how nitrates move through the soil and how they can be managed to improve water quality in underlying... it is a slow process and it may take several years before we see improvement.? Putting nitrates to work AgriLife Research environmental soil scientist Dr. Paul DeLaune is exploring one of these best management practices. Last July, Ale and De...

  9. Precision Dual-Aquifer Dewatering at a Low Level Radiological Cleanup in New Jersey

    SciTech Connect (OSTI)

    Gosnell, A. S.; Langman, J. W. Jr.; Zahl, H. A.; Miller, D. M.

    2002-02-27T23:59:59.000Z

    Cleanup of low-level radioactive wastes at the Wayne Interim Storage Site (WISS), Wayne, New Jersey during the period October, 2000 through November, 2001 required the design, installation and operation of a dual-aquifer dewatering system to support excavation of contaminated soils. Waste disposal pits from a former rare-earth processing facility at the WISS had been in contact with the water table aquifer, resulting in moderate levels of radionuclides being present in the upper aquifer groundwater. An uncontaminated artesian aquifer underlies the water table aquifer, and is a localized drinking water supply source. The lower aquifer, confined by a silty clay unit, is flowing artesian and exhibits potentiometric heads of up to 4.5 meters above grade. This high potentiometric head presented a strong possibility that unloading due to excavation would result in a ''blowout'', particularly in areas where the confining unit was < 1 meter thick. Excavation of contaminated materials w as required down to the surface of the confining unit, potentially resulting in an artesian aquifer head of greater than 8 meters above the excavation surface. Consequently, it was determined that a dual-aquifer dewatering system would be required to permit excavation of contaminated material, with the water table aquifer dewatered to facilitate excavation, and the deep aquifer depressurized to prevent a ''blowout''. An additional concern was the potential for vertical migration of contamination present in the water table aquifer that could result from a vertical gradient reversal caused by excessive pumping in the confined system. With these considerations in mind, a conceptual dewatering plan was developed with three major goals: (1) dewater the water table aquifer to control radionuclide migration and allow excavation to proceed; (2) depressurize the lower, artesian aquifer to reduce the potential for a ''blowout''; and (3) develop a precise dewatering level control mechanism to insure a vertical gradient reversal did not result in cross-contamination. The plan was executed through a hydrogeologic investigation culminating with the design and implementation of a complex, multi-phased dual-aquifer dewatering system equipped with a state of the art monitoring network.

  10. Temporal and spatial scaling of hydraulic response to recharge in fractured aquifers: Insights from a frequency domain analysis

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Temporal and spatial scaling of hydraulic response to recharge in fractured aquifers: Insights from investigate the hydraulic response to recharge of a fractured aquifer, using a frequency domain approach scaling of hydraulic response to recharge in fractured aquifers: Insights from a frequency domain analysis

  11. Permanent scatterer InSAR reveals seasonal and long-term aquifer-system response to groundwater pumping and artificial

    E-Print Network [OSTI]

    Amelung, Falk

    with an artificial recharge program, long-term, residual, inelastic aquifer-system compaction (subsidenceSAR reveals seasonal and long-term aquifer-system response to groundwater pumping and artificial rechargePermanent scatterer InSAR reveals seasonal and long-term aquifer-system response to groundwater

  12. MODELING OF CO2 LEAKAGE UP THROUGH AN ABANDONED WELL FROM DEEP SALINE AQUIFER TO SHALLOW FRESH

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 MODELING OF CO2 LEAKAGE UP THROUGH AN ABANDONED WELL FROM DEEP SALINE AQUIFER TO SHALLOW FRESH restricted to: (i) supercritical CO2 injection and storage within the Dogger reservoir aquifer, (ii) CO2 the cement-rock formation interface in the abandoned well (iii) impacts on the Albian aquifer water quality

  13. Short-and long-time behavior of aquifer drainage after slow and sudden recharge according to the linearized Laplace equation

    E-Print Network [OSTI]

    Walter, M.Todd

    not fully penetrate the aquifer, the solution still produces good results [Szilagyi, J. Sensitivity analysis

  14. Hydrochemistry and hydrogeologic conditions within the Hanford Site upper basalt confined aquifer system

    SciTech Connect (OSTI)

    Spane, F.A. Jr.; Webber, W.D.

    1995-09-01T23:59:59.000Z

    As part of the Hanford Site Ground-Water Surveillance Project, Flow System Characterization Task. Pacific Northwest Laboratory examines the potential for offsite migration of contamination within the upper basalt confined aquifer system for the US Department of Energy (DOE). As part of this activity, groundwater samples were collected over the past 2 years from selected wells completed in the upper Saddle Mountains Basalt. The hydrochemical and isotopic information obtained from these groundwater samples provides hydrologic information concerning the aquifer-flow system. Ideally, when combined with other hydrologic property information, hydrochemical and isotopic data can be used to evaluate the origin and source of groundwater, areal groundwater-flow patterns, residence and groundwater travel time, rock/groundwater reactions, and aquifer intercommunication for the upper basalt confined aquifer system. This report presents the first comprehensive Hanford Site-wide summary of hydrochemical properties for the upper basalt confined aquifer system. This report provides the hydrogeologic characteristics (Section 2.0) and hydrochemical properties (Section 3.0) for groundwater within this system. A detailed description of the range of the identified hydrochemical parameter subgroups for groundwater in the upper basalt confined aquifer system is also presented in Section 3.0. Evidence that is indicative of aquifer contamination/aquifer intercommunication and an assessment of the potential for offsite migration of contaminants in groundwater within the upper basalt aquifer is provided in Section 4.0. The references cited throughout the report are given in Section 5.0. Tables that summarize groundwater sample analysis results for individual test interval/well sites are included in the Appendix.

  15. Geology and hydrogeology of the Edwards Aquifer Transition Zone, Bexar County, Texas

    E-Print Network [OSTI]

    Neathery, Jeffrey Stephen

    1989-01-01T23:59:59.000Z

    into the Edwards Aquifer (Figure 5). Rainfall and stream flow on the Balcones Fault Zone/Transition Zone also contributes to the water migrating to and recharging the Edwards Aquifer. Water 14 OKLAHOMA ARKANSAS TEXAS l a g/ CENTRAL I I(l TEXAS I I PLA M I... WATER LINE Glen Roee Llmeetone aneltlon Z one F Oem ~ lion FLOWING ARTESIAN WELL nanna fa an r aaneltlon Z one DWA AQUIFER EDWARDS PLATEAU BALCONES ESCARPMENT Glen Roe e Lime alone ALCONE FAULT ZONE Generalized cross section...

  16. Uncertainty analyses of CO2 plume expansion subsequent to wellbore CO2 leakage into aquifers

    SciTech Connect (OSTI)

    Hou, Zhangshuan; Bacon, Diana H.; Engel, David W.; Lin, Guang; Fang, Yilin; Ren, Huiying; Fang, Zhufeng

    2014-08-01T23:59:59.000Z

    In this study, we apply an uncertainty quantification (UQ) framework to CO2 sequestration problems. In one scenario, we look at the risk of wellbore leakage of CO2 into a shallow unconfined aquifer in an urban area; in another scenario, we study the effects of reservoir heterogeneity on CO2 migration. We combine various sampling approaches (quasi-Monte Carlo, probabilistic collocation, and adaptive sampling) in order to reduce the number of forward calculations while trying to fully explore the input parameter space and quantify the input uncertainty. The CO2 migration is simulated using the PNNL-developed simulator STOMP-CO2e (the water-salt-CO2 module). For computationally demanding simulations with 3D heterogeneity fields, we combined the framework with a scalable version module, eSTOMP, as the forward modeling simulator. We built response curves and response surfaces of model outputs with respect to input parameters, to look at the individual and combined effects, and identify and rank the significance of the input parameters.

  17. Microbial ecology and carbon cycling in Texas aquifers

    SciTech Connect (OSTI)

    Zhang, Chuanlun; Grossman, E.L. (Texas A and M Univ., College Station, TX (United States). Dept. of Geology); MacRae, M.; Ammerman, J.W. (Texas A and M Univ., College Station, TX (United States). Dept. of Oceanography)

    1992-01-01T23:59:59.000Z

    To evaluate the relationship between microbial activity and carbon cycling in the subsurface, the authors performed geochemical and microbiological analyses on ground-waters from 15 wells in three aquifers in Texas--the Edwards (Ed), the Wilcox-Carrizo (WC), and the Sparta-Queen City (SQC). Samples were collected from 128 to 976 m depth. Total bacteria enumerated by direct count methodology range from 1.6 [times] 10[sup 3] to 4.0 [times] 10[sup 4] cells/ml. In both the (SQC) and (WC) aquifers, total bacterial counts decrease with depth. Total counts in (SQC) waters decrease from 6 [times] 10[sup 3] cells/ml at 217 m to 2 [times] 10[sup 3] cells/ml at 616 m; total counts in (WC) waters decrease from 32 [times] 10[sup 3] cells/ml at 369 m to [approximately]5 [times] 10[sup 3] cells/ml at 907 m. Except for two wells, all of the waters contained trace to large amounts of methane. Carbon isotopic analyses of dissolved and head-gas methane range from [minus]80 to [minus]9[per thousand]. Light [delta] C-13 values for methane indicate methane production by bacteria without secondary alteration while heavy [delta] C-13 values for methane strongly suggest methane oxidation, probably by sulfate reduction. delta C-13 values of DIC for high bicarbonate waters indicate a source of CO[sub 2] associated with methanogenesis through fermentation reactions and CO[sub 2] reduction. No correlation is found between the response to the archaebacterial probe and methane content in water, probably due to the limited sensitivity of the archaebacterial probe. However, anaerobic laboratory incubations of water samples in nutrient media showed significant production of methane for all cultured samples except those showing isotopic evidence for methane oxidation. This suggests that methanogens may be present in all waters except those in which methane oxidation has occurred.

  18. SIMULATION OF CARBON DIOXIDE STORAGE APPLYING ...

    E-Print Network [OSTI]

    Capture and storage of Carbon dioxide in aquifers and reservoirs is one of the solutions to mitigate the greenhouse effect. Geophysical methods can be used to

  19. The Effect of Ashe Juniper Removal on Groundwater Recharge in the Edwards Aquifer

    E-Print Network [OSTI]

    Bazan, Roberto

    2011-02-22T23:59:59.000Z

    Understanding groundwater recharge rates has direct relevance for management of the Edwards Aquifer, which serves as the main source of fresh water for the city of San Antonio and surrounding communities. As population around San Antonio continues...

  20. CO[subscript 2] migration in saline aquifers. Part 2. Capillary and solubility trapping

    E-Print Network [OSTI]

    MacMinn, C. W.

    The large-scale injection of carbon dioxide (CO[subscript 2]) into saline aquifers is a promising tool for reducing atmospheric CO[subscript 2] emissions to mitigate climate change. An accurate assessment of the post-injection ...

  1. Weathered Diesel oil as a sorptive phase for hydrophobic organic compounds in aquifer materials

    E-Print Network [OSTI]

    Hudson, Rondall James

    1994-01-01T23:59:59.000Z

    The sorptive properties of weathered diesel oil were investigated by conducting miscible displacement experiments with three hydrophobic organic compounds (HOCs), acenapthene, fluorene, and dibenzothiophene, as tracers in columns containing aquifer...

  2. Hydrologic and hydraulic assessment of artificial recharge in the Sparta Aquifer of Union County, Arkansas

    E-Print Network [OSTI]

    Sowby, Robert B

    2013-01-01T23:59:59.000Z

    Groundwater pumping from the Sparta aquifer in Union County, Arkansas, has long exceeded natural recharge, threatening the regional water supply. An alternative water-supply project, completed in 2004, now provides treated ...

  3. Simulation of microbial transport and carbon tetrachloride biodegradation in intermittently-fed aquifer columns

    E-Print Network [OSTI]

    Simulation of microbial transport and carbon tetrachloride biodegradation in intermittently associated with carbon tetrachloride (CT) biodegradation in laboratory aquifer columns operated with a pulsed Hydrology: Groundwater transport; KEYWORDS: biodegradation, carbon tetrachloride, microbial transport

  4. Geophysical constraints on contaminant transport modeling in a heterogeneous fluvial aquifer

    E-Print Network [OSTI]

    Zheng, Chunmiao

    Geophysical constraints on contaminant transport modeling in a heterogeneous fluvial aquifer Jerry the geophysically derived hydraulic conductivity representation in numerical simulations of the natural the effectiveness of geophysically derived and flowmeter based representations of the hydraulic conductivity field

  5. The hydrogeochemistry of pond and rice field recharge : implications for the arsenic contaminated aquifers in Bangladesh

    E-Print Network [OSTI]

    Neumann, Rebecca B

    2010-01-01T23:59:59.000Z

    The shallow aquifers in Bangladesh, which provide drinking water for millions and irrigation water for innumerable rice fields, are severely contaminated with geogenic arsenic. Water mass balance calculations show that ...

  6. Physical and chemical effects of CO2 storage in saline aquifers of the southern North Sea 

    E-Print Network [OSTI]

    Heinemann, Niklas

    2013-07-01T23:59:59.000Z

    One of the most promising mitigation strategies for greenhouse gas accumulation in the atmosphere is carbon capture and storage (CCS). Deep saline aquifers are seen as the most efficient carbon dioxide (CO2) storage sites, ...

  7. Rapid nutrient load reduction during infiltration of managed aquifer recharge in an agricultural groundwater basin

    E-Print Network [OSTI]

    Fisher, Andrew

    , treated wastewater and sources influenced by agricultural activity (Ma & Spalding, 1997; Drewes, 2009Rapid nutrient load reduction during infiltration of managed aquifer recharge in an agricultural; denitrification; agriculture; water quality Received 6 October 2010; Accepted 26 July 2011 INTRODUCTION Artificial

  8. STIMULATION OF GEOTHERMAL AQUIFERS Paul Kruger and Henry J. Ramey, J r .

    E-Print Network [OSTI]

    Stanford University

    . STIMULATION OF GEOTHERMAL AQUIFERS Paul Kruger and Henry J. Ramey, J r . Co o f Geothermal Formations . . . . . . . . 6 Table 2: Water Quali t y Constituents-Water Distribution Coefficients . . . . . . . . 62 Table 7: Gaseous Constituents i n Geothermal Fluids . . . . . . 64

  9. Three-dimensional conceptual model for the Hanford Site unconfined aquifer system: FY 1994 status report

    SciTech Connect (OSTI)

    Thorne, P.D.; Chamness, M.A.; Vermeul, V.R.; Macdonald, Q.C.; Schubert, S.E.

    1994-11-01T23:59:59.000Z

    This report documents work conducted during the fiscal year 1994 to development an improved three-dimensional conceptual model of ground-water flow in the unconfined aquifer system across the Hanford Site Ground-Water Surveillance Project, which is managed by Pacific Northwest Laboratory. The main objective of the ongoing effort to develop an improved conceptual model of ground-water flow is to provide the basis for improved numerical report models that will be capable of accurately predicting the movement of radioactive and chemical contaminant plumes in the aquifer beneath Hanford. More accurate ground-water flow models will also be useful in assessing the impacts of changes in facilities and operations. For example, decreasing volumes of operational waste-water discharge are resulting in a declining water table in parts of the unconfined aquifer. In addition to supporting numerical modeling, the conceptual model also provides a qualitative understanding of the movement of ground water and contaminants in the aquifer.

  10. acidic uranium-contaminated aquifer: Topics by E-print Network

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

    availability of ground water and the impact of withdrawals on existing users and the environment Sand-And-Gravel Aquifer Santa; Christopher J. Richards 30 Water temperature as a...

  11. Seasonal dynamics in costal aquifers : investigation of submarine groundwater discharge through field measurements and numerical models

    E-Print Network [OSTI]

    Michael, Holly Anne, 1976-

    2005-01-01T23:59:59.000Z

    The fresh and saline groundwater flowing from coastal aquifers into the ocean comprise submarine groundwater discharge (SGD). This outflow is an important pathway for the transport of nutrients and contaminants, and has ...

  12. Regression Based Investigation of Pumping Limits and Springflow Within the Edwards Aquifer

    E-Print Network [OSTI]

    McCarl, Bruce A.

    Regression Based Investigation of Pumping Limits and Springflow Within the Edwards Aquifer K . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 A Model to Study the Effects of Pumping Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Investigation of the Effects of Pumping Allocations on Springflow

  13. Simulation Study of Heat Transportation in an Aquifer about Well-water-source Heat Pump

    E-Print Network [OSTI]

    Cong, X.; Liu, Y.; Yang, W.

    2006-01-01T23:59:59.000Z

    The study of groundwater reinjection, pumping and heat transportation in an aquifer plays an important theoretical role in ensuring the stability of deep-well water reinjection and pumping as well as smooth reinjection. Based on the related...

  14. Rock-water interactions of the Madison Aquifer, Mission Canyon Formation, Williston Basin, North Dakota 

    E-Print Network [OSTI]

    Spicer, James Frank

    1994-01-01T23:59:59.000Z

    and provide an excellent framework in which to study rockwater interactions in highly saline aquifers. Geochemical speciation was coupled with data visualization interpretations in order to understand specific rock-water interactions that occur...

  15. Simulation Study of Heat Transportation in an Aquifer about Well-water-source Heat Pump 

    E-Print Network [OSTI]

    Cong, X.; Liu, Y.; Yang, W.

    2006-01-01T23:59:59.000Z

    The study of groundwater reinjection, pumping and heat transportation in an aquifer plays an important theoretical role in ensuring the stability of deep-well water reinjection and pumping as well as smooth reinjection. Based on the related...

  16. Weathered Diesel oil as a sorptive phase for hydrophobic organic compounds in aquifer materials 

    E-Print Network [OSTI]

    Hudson, Rondall James

    1994-01-01T23:59:59.000Z

    The sorptive properties of weathered diesel oil were investigated by conducting miscible displacement experiments with three hydrophobic organic compounds (HOCs), acenapthene, fluorene, and dibenzothiophene, as tracers in columns containing aquifer...

  17. Analysis of No-Flow Boundaries in Mixed Unconfined-Confined Aquifer Systems 

    E-Print Network [OSTI]

    Langerlan, Kent A.

    2010-07-14T23:59:59.000Z

    As human population increases, demand for water supplies will cause an increase in pumping rates from confined aquifers which may become unconfined after long-term pumping. Such an unconfined-confined conversion problem has not been fully...

  18. Interpretation of Flow Logs from Nevada Test Site Boreholes to Estimate Hydraulic conductivity Using Numerical Simulations Constrained by Single-Well Aquifer Tests

    SciTech Connect (OSTI)

    Garcia, C. Amanda; Halford, Keith J.; Laczniak, Randell J.

    2010-02-12T23:59:59.000Z

    Hydraulic conductivities of volcanic and carbonate lithologic units at the Nevada Test Site were estimated from flow logs and aquifer-test data. Borehole flow and drawdown were integrated and interpreted using a radial, axisymmetric flow model, AnalyzeHOLE. This integrated approach is used because complex well completions and heterogeneous aquifers and confining units produce vertical flow in the annular space and aquifers adjacent to the wellbore. AnalyzeHOLE simulates vertical flow, in addition to horizontal flow, which accounts for converging flow toward screen ends and diverging flow toward transmissive intervals. Simulated aquifers and confining units uniformly are subdivided by depth into intervals in which the hydraulic conductivity is estimated with the Parameter ESTimation (PEST) software. Between 50 and 150 hydraulic-conductivity parameters were estimated by minimizing weighted differences between simulated and measured flow and drawdown. Transmissivity estimates from single-well or multiple-well aquifer tests were used to constrain estimates of hydraulic conductivity. The distribution of hydraulic conductivity within each lithology had a minimum variance because estimates were constrained with Tikhonov regularization. AnalyzeHOLE simulated hydraulic-conductivity estimates for lithologic units across screened and cased intervals are as much as 100 times less than those estimated using proportional flow-log analyses applied across screened intervals only. Smaller estimates of hydraulic conductivity for individual lithologic units are simulated because sections of the unit behind cased intervals of the wellbore are not assumed to be impermeable, and therefore, can contribute flow to the wellbore. Simulated hydraulic-conductivity estimates vary by more than three orders of magnitude across a lithologic unit, indicating a high degree of heterogeneity in volcanic and carbonate-rock units. The higher water transmitting potential of carbonate-rock units relative to volcanic-rock units is exemplified by the large difference in their estimated maximum hydraulic conductivity; 4,000 and 400 feet per day, respectively. Simulated minimum estimates of hydraulic conductivity are inexact and represent the lower detection limit of the method. Minimum thicknesses of lithologic intervals also were defined for comparing AnalyzeHOLE results to hydraulic properties in regional ground-water flow models.

  19. An investigation of pneumatic control on immiscible contaminant migration in confined aquifers 

    E-Print Network [OSTI]

    Watts, John David

    1991-01-01T23:59:59.000Z

    AN INVESTIGATION OF PNEUMATIC CONTROL ON IMMISCIBLE CONTAMINANT MIGRATION IN CONFINED AQUIFERS A Thesis by JOHN DAVID WATTS Submitted to the Office of Graduate Studies of Texas AkM University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE May 1991 Major Subject: Civil Engineering AN INVESTIGATION OF PNEUMATIC CONTROL ON IMMISCIBLE CONTAMINANT MIGRATION IN CONFINED AQUIFERS A Thesis by JOHN DAVID %VATTS Approved as to style and content by: W e . mes...

  20. A parametric and economic investigation of an energy system utilizing aquifer storage 

    E-Print Network [OSTI]

    Tostengard, Stephen Gilbert

    1980-01-01T23:59:59.000Z

    -Chairman of Committee) (Co-Chairman of Committee) (He d. of Department (Member) e ber) December 1980 ABSTRACT A Parametric and Economic Investigation of an Energy System Utilizing Aquifer Storage. (Dec. 1980) Stephen Gilbert Tostengard B. S. , Texas Lutheran... College Co-Chairmen of Advisory Committee: Or. Richard R. Davison Dr. William B. Harris Aquifers may be used as long-term storage facilities i'or heated or chilled water. Computer models were used to simulate the thermal response of an aquafer...

  1. Effect of sediment concentration on artificial well recharge in a fine sand aquifer 

    E-Print Network [OSTI]

    Rahman, Mohammed Ataur

    1968-01-01T23:59:59.000Z

    EFFECT OF SEDIMENT CONCENTRATION ON ARTIFICIAL WELL RECHARGE IN A FINE SAND AQUIFER A Thesis By MD. ATAUR RAHMAN Submitted to the Graduate College of the Texas ASM University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE May 1968 Major Subject: Agricultural Engineering EFFECT OF SEDIMENT CONCENTRATION ON ARTIFICIAL WELL RECHARGE IN A FINE SAND AqUIFER A Thesis By MD. ATAUR RAHMAN Approved as to style and content by: (Chairman of ommitt ) ( a o...

  2. Geology and hydrogeology of the Edwards Aquifer Transition Zone, Bexar County, Texas 

    E-Print Network [OSTI]

    Neathery, Jeffrey Stephen

    1989-01-01T23:59:59.000Z

    GEOLOGY AND HYDROGEOLOGY OF THE EDWARDS AQUIFER TRANSITION ZONE, BEXAR COUNTY, TEXAS A Thesis by JEFFREY STEPHEN HEATHERY Submitted to the Office of Graduate Studies of Texas AQh University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE May 1989 Major Subject: Geology GEOLOGY AND HYDROGEOLOGY OF THE EDWARDS AQUIFER TRANSITION ZONE, BEXAR COUNTY, TEXAS A Thesis by JEFFREY STEPHEN HEATHERY Approved as to style and content by: Chris pher C. Mathewson...

  3. Effect of methane pulsation on methanotropic biodegradation of trichloroethylene in an in-situ model aquifer 

    E-Print Network [OSTI]

    Natarajan, Ranjan

    1993-01-01T23:59:59.000Z

    EFFECT OF METHANE PULSATION ON METHANOTROPHIC BIODEGRADATION OF TRICHLOROETHYLENE IN AN IN-SITU MODEL AQUIFER A Thesis by RAN JAN NATARAJAN Submitted to the OIIice of Graduate Studies of Texas A8rM University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE August 1993 Major Subject: Agricultural Engineering EFFECT OF MET~ PULSATION ON METHANOTROPHIC BIODEGRADATION OF TRICHLOROETHYLENE IN AN IN-SITU MODEL AQUIFER A Thesis by RAN JAN NATARA JAN Submitted...

  4. Effect of methane pulsation on methanotropic biodegradation of trichloroethylene in an in-situ model aquifer

    E-Print Network [OSTI]

    Natarajan, Ranjan

    1993-01-01T23:59:59.000Z

    EFFECT OF METHANE PULSATION ON METHANOTROPHIC BIODEGRADATION OF TRICHLOROETHYLENE IN AN IN-SITU MODEL AQUIFER A Thesis by RAN JAN NATARAJAN Submitted to the OIIice of Graduate Studies of Texas A8rM University in partial fulfillment... of Department) August 1993 Major Subject: Agricultural Engineering ABSTRACT Effect of Methane Pulsation on Methanotrophic Biodegradation of Trichloroethylene in an in-situ Model Aquifer. (August 1993) Ranjan Natarajan, B. E. , P. S. G College...

  5. IMPROVED NUMERICAL METHODS FOR MODELING RIVER-AQUIFER INTERACTION.

    SciTech Connect (OSTI)

    Tidwell, Vincent C.; Sue Tillery; Phillip King

    2008-09-01T23:59:59.000Z

    A new option for Local Time-Stepping (LTS) was developed to use in conjunction with the multiple-refined-area grid capability of the U.S. Geological Survey's (USGS) groundwater modeling program, MODFLOW-LGR (MF-LGR). The LTS option allows each local, refined-area grid to simulate multiple stress periods within each stress period of a coarser, regional grid. This option is an alternative to the current method of MF-LGR whereby the refined grids are required to have the same stress period and time-step structure as the coarse grid. The MF-LGR method for simulating multiple-refined grids essentially defines each grid as a complete model, then for each coarse grid time-step, iteratively runs each model until the head and flux changes at the interfacing boundaries of the models are less than some specified tolerances. Use of the LTS option is illustrated in two hypothetical test cases consisting of a dual well pumping system and a hydraulically connected stream-aquifer system, and one field application. Each of the hypothetical test cases was simulated with multiple scenarios including an LTS scenario, which combined a monthly stress period for a coarse grid model with a daily stress period for a refined grid model. The other scenarios simulated various combinations of grid spacing and temporal refinement using standard MODFLOW model constructs. The field application simulated an irrigated corridor along the Lower Rio Grande River in New Mexico, with refinement of a small agricultural area in the irrigated corridor.The results from the LTS scenarios for the hypothetical test cases closely replicated the results from the true scenarios in the refined areas of interest. The head errors of the LTS scenarios were much smaller than from the other scenarios in relation to the true solution, and the run times for the LTS models were three to six times faster than the true models for the dual well and stream-aquifer test cases, respectively. The results of the field application show that better estimates of daily stream leakage can be made with the LTS simulation, thereby improving the efficiency of daily operations for an agricultural irrigation system. ACKNOWLEDGEMENTSThe authors appreciatively acknowledge support for Sue Tillery provided by Sandia National Laboratories' through a Campus Executive Laboratory Directed Research and Development (LDRD) research project.Funding for this study was provided by Directed Research and Development (LDRD) research project.

  6. Climate Change Impacts on the Arbuckle-Simpson Aquifer in South-Central Oklahoma due to Projected Precipitation Variations

    E-Print Network [OSTI]

    Osborne, Cesalea

    2014-11-19T23:59:59.000Z

    Precipitation Variations on the Arbuckle-Simpson Aquifer in South-Central Oklahoma due to Projected Climate Change Impacts Cesalea N. Osborne Environmental Science Haskell Indian Nations University This project was sponsored by Kiksapa Consulting... through NASA CAN NNX10AU65A The Arbuckle-Simpson aquifer spans five counties in south-central Oklahoma: Carter, Coal, Johnston, Murray, and Pontotoc Base Data • Aquifer study area, roads, rural/non-rural communities, state/county boundaries Methodology...

  7. Developing conservation plan for the Edwards Aquifer: Stakeholders reach consensus resolution to balance protection of endangered species and water use 

    E-Print Network [OSTI]

    Smith, Courtney

    2012-01-01T23:59:59.000Z

    Fall 2012 tx H2O 17 Story by Courtney Smith ] Comal and San Marcos springs are the only known habitats for eight federally listed threatened or endangered species. Photo courtesy of the Edwards Aquifer Authority. What does it take... Aquifer region of Texas achieved a milestone in a struggle that has lasted nearly six decades. Working together, participants in the Edwards Aquifer Recovery Implementation Program (EARIP) developed a habitat conservation plan that will protect...

  8. Uranium partitioning under acidic conditions in a sandy soil aquifer

    SciTech Connect (OSTI)

    Johnson, W.H. [Westinghouse Savannah River Co., Aiken, SC (United States). Savannah River Technology Center]|[Georgia Institute of Technology, Atlanta, GA (United States); Serkiz, S.M. [Westinghouse Savannah River Co., Aiken, SC (United States). Savannah River Technology Center; Johnson, L.M. [Clemson Univ., SC (United States). Environmental Systems Engineering] [and others

    1995-07-01T23:59:59.000Z

    The partitioning of uranium in an aquifer down gradient of two large mixed waste sites was examined with respect to the solution and soil chemistry (e.g., pH redox potential and contaminant concentration) and aqueous-phase chemical speciation. This involved generation of field-derived, batch sorption, and reactive mineral surface sorption data. Field-derived distribution coefficients for uranium at these waste sites were found to vary between 0.40 and 15,000. Based on thermodynamic speciation modeling and a comparison of field and laboratory data, gibbsite is a potential reactive mineral surface present in modified soils at the sites. Uranium partitioning data are presented from field samples and laboratory studies of background soil and the mineral surface gibbsite. Mechanistic and empirical sorption models fit to the field-derived uranium partitioning data show an improvement of over two orders of magnitude, as measured by the normalized sum of errors squared, when compared with the single K{sub d} model used in previous risk work. Models fit to batch sorption data provided a better fit of sorbed uranium than do models fit to the field-derived data.

  9. Evaluating impacts of CO2 gas intrusion into a confined sandstone aquifer: Experimental results

    SciTech Connect (OSTI)

    Qafoku, Nikolla; Lawter, Amanda R.; Shao, Hongbo; Wang, Guohui; Brown, Christopher F.

    2014-12-31T23:59:59.000Z

    Deep subsurface storage and sequestration of CO2 has been identified as a potential mitigation technique for rising atmospheric CO2 concentrations. Sequestered CO2 represents a potential risk to overlying aquifers if the CO2 leaks from the deep storage reservoir. Experimental and modeling work is required to evaluate potential risks to groundwater quality and develop a systematic understanding of how CO2 leakage may cause important changes in aquifer chemistry and mineralogy by promoting dissolution/precipitation, adsorption/desorption, and redox reactions. Sediments from the High Plains aquifer in Kansas, United States, were used in this investigation, which is part of the National Risk Assessment Partnership Program sponsored by the US Department of Energy. This aquifer was selected to be representative of consolidated sand and gravel/sandstone aquifers overlying potential CO2 sequestration repositories within the continental US. In this paper, we present results from batch experiments conducted at room temperature and atmospheric pressure with four High Plains aquifer sediments. Batch experiments simulate sudden, fast, and short-lived releases of the CO2 gas as would occur in the case of well failure during injection. Time-dependent release of major, minor, and trace elements were determined by analyzing the contacting solutions. Characterization studies demonstrated that the High Plains aquifer sediments were abundant in quartz and feldspars, and contained about 15 to 20 wt% montmorillonite and up to 5 wt% micas. Some of the High Plains aquifer sediments contained no calcite, while others had up to about 7 wt% calcite. The strong acid extraction tests confirmed that in addition to the usual elements present in most soils, rocks, and sediments, the High Plains aquifer sediments had appreciable amounts of As, Cd, Pb, Cu, and occasionally Zn, which potentially may be mobilized from the solid to the aqueous phase during or after exposure to CO2. However, the results from the batch experiments showed that the High Plains sediments mobilized only low concentrations of trace elements (potential contaminants), which were detected occasionally in the aqueous phase during these experiments. Importantly, these occurrences were more frequent in the calcite-free sediment. Results from these investigations provide useful information to support site selection, risk assessment, and public education efforts associated with geological CO2 storage and sequestration.

  10. Aquifer restoration at in-situ leach uranium mines: evidence for natural restoration processes

    SciTech Connect (OSTI)

    Deutsch, W.J.; Serne, R.J.; Bell, N.E.; Martin, W.J.

    1983-04-01T23:59:59.000Z

    Pacific Northwest Laboratory conducted experiments with aquifer sediments and leaching solution (lixiviant) from an in-situ leach uranium mine. The data from these laboratory experiments and information on the normal distribution of elements associated with roll-front uranium deposits provide evidence that natural processes can enhance restoration of aquifers affected by leach mining. Our experiments show that the concentration of uranium (U) in solution can decrease at least an order of magnitude (from 50 to less than 5 ppM U) due to reactions between the lixiviant and sediment, and that a uranium solid, possibly amorphous uranium dioxide, (UO/sub 2/), can limit the concentration of uranium in a solution in contact with reduced sediment. The concentrations of As, Se, and Mo in an oxidizing lixiviant should also decrease as a result of redox and precipitation reactions between the solution and sediment. The lixiviant concentrations of major anions (chloride and sulfate) other than carbonate were not affected by short-term (less than one week) contact with the aquifer sediments. This is also true of the total dissolved solids level of the solution. Consequently, we recommend that these solution parameters be used as indicators of an excursion of leaching solution from the leach field. Our experiments have shown that natural aquifer processes can affect the solution concentration of certain constituents. This effect should be considered when guidelines for aquifer restoration are established.

  11. Economic comparison of CAES designs employing hardrock, salt, and aquifer storage reservoirs

    SciTech Connect (OSTI)

    Reilly, R.W.; Schainker, R.B.

    1981-01-01T23:59:59.000Z

    The economic performance of three CAES designs is briefly examined. Each design was developed by a different A and E under different assumptions and constraints, and each employed a different type of air storage facility: a hardrock-mined cavity, a solution-mined salt deposit, and an aquifer. The results indicate that aquifer and salt storage facilities cost roughly 60 to 70% of the equivalent hardrock-mined cavern. In this comparison the aquifer storage facility was somewhat less expensive than the salt cavity, but this difference could be reversed with different salt and/or aquifer characteristics. For instance, if the aquifer had been less permeable, then more wells would have been required for the same power level, and total storage cost would have been higher. The major difference between the plant cost estimates lies not in the cost of storage facilities, but rather in vendor estimates of turbomachinery cost. And, since turbomachinery contributes about half of total plant cost, this difference could be critical to the decision to build a CAES plant.

  12. Inducinga CO2 leak into ashallow aquifer (CO2FieldLab EUROGIA+ project): Monitoring the CO2 plume in groundwaters.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    (saline aquifer, depleted oil/gas reservoir), aquifers are ubiquitousin the overlying sedimentary pile in case of unwanted CO2leakages from a storage site. Independently from the nature of the reservoir

  13. HOUSING GUARANTEE Apply Online

    E-Print Network [OSTI]

    Mease, Kenneth D.

    THE UCI HOUSING GUARANTEE Apply Online 1 Log in to your MyAdmission account via the tab of Admission fee. 3 Complete the Online Housing Application and pay the $20 non-refundable fee. Freshmen apply for the residence halls. Transfer students apply for Arroyo Vista theme houses and on-campus apartments. Students 25

  14. Managing the risk of CO2 leakage from deep saline aquifer reservoirs through the creation of a hydraulic barrier

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    - up in the storage reservoir. For some man-made leakages (e.g. abandoned well), and more importantlyGHGT-10 Managing the risk of CO2 leakage from deep saline aquifer reservoirs through the creation emissions. Depleted oil and gas fields or saline aquifers are seen as possible storage reservoirs

  15. Impact of porous medium desiccation during anhydrous CO2 injection in deep saline aquifers: up scaling from experimental

    E-Print Network [OSTI]

    Boyer, Edmond

    flow rate and capillary properties on the desiccation mechanisms. Keywords: supercritical CO2, dryingImpact of porous medium desiccation during anhydrous CO2 injection in deep saline aquifers: up - France Abstract Injection of CO2 in geological reservoirs or deep aquifers is nowadays studied

  16. TWO-DIMENSIONAL REACTIVE TRANSPORT MODELING OF CO2 INJECTION IN A SALINE AQUIFER AT THE SLEIPNER SITE

    E-Print Network [OSTI]

    Boyer, Edmond

    model of long-term geological storage of carbon dioxide. A data set from the Utsira formation assemblages are considered in the Utsira formation, a sand formation that is highly permeable and a shale or gas reservoirs, (ii) unmineable coal beds and (iii) saline aquifers. Deep saline aquifers offer

  17. Isotope characterization of shallow aquifers in the Horombe region, South of Madagascar

    E-Print Network [OSTI]

    Fareze, L P; Ramaroson, V; Andriambololona, Raoelina; Andriamiarintsoa, G; Razafitsalama, P R; Rahobisoa, J J; Randrianarison, H; Ranaivoarisoa, A; Marah, H

    2012-01-01T23:59:59.000Z

    The present study deals with the problem of evaluation of the recharge mechanism and the characterization of the groundwater flow system in the basement shallow aquifer, which is one of the groundwater resource in the semi-arid South region of Madagascar. Stable isotopes (deuterium and oxygen-18) and tritium are used to achieve with accuracy the hydrogeological and geochemical dynamics study. Chemical analysis is used to provide complementary information to the investigation. A space distribution of tritium concentration and isotopic composition in groundwater shows evidence of two opposite categories of aquifers, which is confirmed by the chemical analysis results and by the geological features of the study site. Some groundwater flow path directions have been identified in the study area thanks to the tritium concentration space distribution and the geological formation. Besides, the groundwater recharge of the shallow aquifers in the South of Madagascar has been characterized by the exponential mixing mode...

  18. Detections of MTBE in surficial and bedrock aquifers in New England

    SciTech Connect (OSTI)

    Grady, S.J. [Geological Survey, Hartford, CT (United States)

    1995-12-31T23:59:59.000Z

    The gasoline additive methyl tert-butyl ether (MTBE) was detected in 24% of water samples collected from surficial and bedrock aquifers in areas of New England. MTBE was the most frequently detected volatile organic compound among the 60 volatile chemicals analyzed and was present in 33 of 133 wells sampled from July 1993 through September 1995. The median MTBE concentration measured in ground-water samples was 0.45 microgram per liter and concentrations ranged from 0.2 to 5.8 microgram per liter. The network of wells sampled for MTBE consisted of 103 monitoring wells screened in surficial sand-and-gravel aquifers and 30 domestic-supply wells in fractured crystalline bedrock aquifers. Seventy-seven percent of all MTBE detections were from 26 shallow monitoring wells screened in surficial aquifers. MTBE was detected in42% of monitoring wells in urban areas. In agricultural areas, MTBE was detected i 8% (2 of 24) of wells and was not detected in undeveloped areas. Sixty-two percent of the MTBE detections in surficial aquifers were from wells within 0.25 mile of gasoline stations or underground gasoline storage tanks; all but one of these wells were in Connecticut and Massachusetts, where reformulated gasoline is used. MTBE was detected in 23% of deep domestic-supply wells that tapped fractured bedrock aquifers. MTBE was detected in bedrock wells only in Connecticut and Massachusetts; land use near the wells was suburban to rural, and none of the sampled bedrock wells were within 0.25 mile of a gasoline station.

  19. Two well storage systems for combined heating and airconditioning by groundwater heatpumps in shallow aquifers

    SciTech Connect (OSTI)

    Pelka, W.

    1980-07-01T23:59:59.000Z

    The use of soil and ground water as an energy source and heat storage systems for heat pumps in order to conserve energy in heating and air conditioning buildings is discussed. Information is included on heat pump operation and performance, aquifer characteristics, soil and ground water temperatures, and cooling and heating demands. Mathematical models are used to calculate flow and temperature fields in the aquifer. It is concluded that two well storage systems with ground water heat pumps are desirable, particularly in northern climates. (LCL)

  20. Impact of background flow on dissolution trapping of carbon dioxide injected into saline aquifers

    E-Print Network [OSTI]

    Rapaka, Saikiran

    2011-01-01T23:59:59.000Z

    While there has been a large interest in studying the role of dissolution-driven free convection in the context of geological sequestration, the contribution of forced convection has been largely ignored. This manuscript considers CO$_2$ sequestration in saline aquifers with natural background flow and uses theoretical arguments to compute the critical background velocity needed to establish the forced convective regime. The theoretical arguments are supported by two dimensional high-resolution numerical simulations which demonstrate the importance of forced convection in enhancing dissolution in aquifers characterised by low Rayleigh numbers.

  1. A parametric and economic investigation of an energy system utilizing aquifer storage

    E-Print Network [OSTI]

    Tostengard, Stephen Gilbert

    1980-01-01T23:59:59.000Z

    CLIMATE. . 5. RESULTS PROM SOLAR& COLD CLIMATE. . 6. RESULTS PROM SPRAY POR SEVERAL LOCATIONS. . 7. RESULTS PROM SPRAY POR AMARILLO. . 8. EXAMPLE OP SOLAR AVERAGING PROCESS. . 9. WET-BULB DATA POR SPRAY. 39 . . 50 . . 70 . . 76 . . 78 . . 159... aquifer at a mild climate. 52 8. Recovery efficiency for a 30. 48 m aquii'er in a mild climate. 9. Recovery efficiency for a 15. 24 m aquifer in a cold climate. 10 ' Recovery efficiency versus injection volume 53 for cold water injection...

  2. The recovery of crude oil spilled on a ground water aquifer 

    E-Print Network [OSTI]

    Malter, Paul Lawrence

    1983-01-01T23:59:59.000Z

    THE RECOVERY OF CRUDE OIL SPILLED ON A GROUND WATER AQUIFER A Thesis by PAUL LAWRENCE MALTER Approved as to style and content by: oy W, ann, J (Ch irman of Committee) / Dona McDona (Head of Department) as (Me ) 0 s Le a . ~e e (Member...) May 1983 ABSTRACT The Recovery of Crude Oil Spilled on a Ground Water Aquifer. (Nay 1983) Paul Lawrence Malter, B. S. , Texas A6K University Chairman of Advisory Committee: Roy W. Bann, Jr. Case histories of previous petroleum spill cleanups...

  3. Legal and regulatory issues affecting the aquifer thermal energy storage concept

    SciTech Connect (OSTI)

    Hendrickson, P.L.

    1980-10-01T23:59:59.000Z

    A number of legal and regulatory issus that potentially can affect implementation of the Aquifer Thermal Energy Storage (ATES) concept are examined. This concept involves the storage of thermal energy in an underground aquifer until a later date when it can be effectively utilized. Either heat energy or chill can be stored. Potential end uses of the energy include district space heating and cooling, industrial process applications, and use in agriculture or aquaculture. Issues are examined in four categories: regulatory requirements, property rights, potential liability, and issues related to heat or chill delivery.

  4. Apparatus and method for extraction of chemicals from aquifer remediation effluent water

    DOE Patents [OSTI]

    McMurtrey, Ryan D. (Idaho Falls, ID); Ginosar, Daniel M. (Idaho Falls, ID); Moor, Kenneth S. (Idaho Falls, ID); Shook, G. Michael (Idaho Falls, ID); Moses, John M. (Dedham, MA); Barker, Donna L. (Idaho Falls, ID)

    2002-01-01T23:59:59.000Z

    An apparatus and method for extraction of chemicals from an aquifer remediation aqueous effluent are provided. The extraction method utilizes a critical fluid for separation and recovery of chemicals employed in remediating aquifers contaminated with hazardous organic substances, and is particularly suited for separation and recovery of organic contaminants and process chemicals used in surfactant-based remediation technologies. The extraction method separates and recovers high-value chemicals from the remediation effluent and minimizes the volume of generated hazardous waste. The recovered chemicals can be recycled to the remediation process or stored for later use.

  5. Control of water coning in gas reservoirs by injecting gas into the aquifer 

    E-Print Network [OSTI]

    Haugen, Sigurd Arild

    1980-01-01T23:59:59.000Z

    CONTROL O' NATEP, CONING IN GAS RESERVOIRS BY INJECTII4G CAS INTO THE AQUIFER A Thesis by SIGURD ARILD HAUGEN Submitted to the Graduate College of Texas AIIM University in partial fulfillment of the requirements for the degree of MASTER... Member May 1980 I~SGi9". p ABSTRACT Control of Water Coninc ir, Gas Reservoirs by Injecting Gas into the Aquifer (May 1980) Sigurd Arild Haugen, Dis. Ing. , Roga)and Regional College Chairman of Advisory Committee: Dr. R. A. Morse The production...

  6. Applied Computer Science

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

    Science and Innovation Computing CCS Division CCS-7 Applied Computer Science Innovative co-design of applications, algorithms, and architectures in order to enable...

  7. Apply early! Limited enrollment.

    E-Print Network [OSTI]

    volcano. Experience the culture and history of Hawaii, and the impact of human activitiesApply early! Limited enrollment. Environmental Science in the Hawaiian Islands Observe, research

  8. Selecting and Applying Interfacings

    E-Print Network [OSTI]

    2006-05-01T23:59:59.000Z

    Selecting and using interfacing correctly is an important component of garment construction. The various types of interfacing are described and methods of applying them are discussed in detail....

  9. INTRODUCTION APPLIED GEOPHYSICS

    E-Print Network [OSTI]

    Merriam, James

    GEOL 384.3 INTRODUCTION TO APPLIED GEOPHYSICS OUTLINE INTRODUCTION TO APPLIED GEOPHYSICS GEOL 384 unknowns; the ones we don't know we don't know. And if one looks throughout the history of geophysics he didn't really say geophysics. He said, " ... our country and other free countries ...". But I am

  10. Two different investigations of shallow sandy aquifers inform our thinking about the role of reactive

    E-Print Network [OSTI]

    in contaminated aquifers and the role of Fe(III)- bearing minerals and grain coatings as sorption substrates of reactive iron minerals in hydrogeological systems. Ground water in a number of settings has been described as having elevated concentrations of dissolved iron in anoxic portions of contaminant plumes (e.g. Baedecker

  11. Natural arsenic contamination of Holocene alluvial aquifers by linked tectonic, weathering, and microbial processes

    E-Print Network [OSTI]

    Fayek, Mostafa

    Natural arsenic contamination of Holocene alluvial aquifers by linked tectonic, weathering tectonic, geochemical, and biologic processes lead to natural arsenic contamination of groundwater-bearing minerals occurs. We propose a ``GBH-As'' model that ties together all of the important tectonic, biologic

  12. Column Studies of Anaerobic Carbon Tetrachloride Biotransformation with Hanford Aquifer Material

    E-Print Network [OSTI]

    Semprini, Lewis

    Column Studies of Anaerobic Carbon Tetrachloride Biotransformation with Hanford Aquifer Material bioremediation of carbon tetrachloride (CT) at the Hanford site in south- central Washington state. Benzoate in south- central Washington state has been a defense materials pro- duction complex since 1943. Carbon

  13. Remediation of CO2 Leakage from Deep Saline Aquifer Storage Based on Reservoir and Pollution

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Remediation of CO2 Leakage from Deep Saline Aquifer Storage Based on Reservoir and Pollution Hazards and Safety of CO2 Storage" Division, Orléans, FRANCE www.brgm.fr References Audigane, P., Chiaberge, C., Lions, J., Humez, P., 2009. Modeling of CO2 leakage through an abandoned well from a deep

  14. Controls on the regional-scale salinization of the Ogallala aquifer, Southern High Plains, Texas, USA

    E-Print Network [OSTI]

    Banner, Jay L.

    of Kentucky, Lexington, KY 40506-0053, USA b Department of Geological Sciences, The University of TexasControls on the regional-scale salinization of the Ogallala aquifer, Southern High Plains, Texas, USA Sunil Mehtaa, *, Alan E. Fryara , Jay L. Bannerb a Department of Geological Sciences, University

  15. 2013 Faculty Publications A Cloud-Based Framework for Automating MODFLOW Simulations for Aquifer Management

    E-Print Network [OSTI]

    Olsen Jr., Dan R.

    2013 Faculty Publications A Cloud-Based Framework for Automating MODFLOW Simulations for Aquifer Performance-Based Liquefaction Triggering Models for the SPT. Seismological Society of America 2013 Annual. A Simplified Uniform Hazard Liquefaction Analysis Procedure for Bridges. Transportation Research Record. Kevin

  16. A numerical procedure to model and monitor CO2 sequestration in aquifers

    E-Print Network [OSTI]

    Santos, Juan

    sequestration over very long periods of time. The analysis of CO2 underground storage safety in the long term procedure to model and monitor CO2 sequestration in aquifers ­ p. #12;Introduction. I Storage of CO2 (31.6C, 7.38 MPa). First industrial scale CO2 injection project: Sleipner gas field (North Sea

  17. 1 Spreading and convective dissolution of carbon dioxide in vertically 2 confined, horizontal aquifers

    E-Print Network [OSTI]

    Neufeld, Jerome A.

    1 Spreading and convective dissolution of carbon dioxide in vertically 2 confined, horizontal] Injection of carbon dioxide (CO2) into saline aquifers is a promising tool for reducing 6 anthropogenic CO2 emissions. At reservoir conditions, the injected CO2 is buoyant relative 7 to the ambient groundwater

  18. AQUIFER BIOTHERMOREMEDIATION USING HEAT PUMPS: SOUND THEORETICAL BASIS AND RESULTS ON THERMAL, GEOCHEMICAL AND

    E-Print Network [OSTI]

    Boyer, Edmond

    example, the long-term use of groundwater heat pumps for air conditioning of homes or buildings can induce and hydrogeological background. The presence of organic pollutants in the aquifer can amplify these phenomena/or the well productivity, (ii) an inappropriate temperature for the use of groundwater heat pumps for air

  19. Evaluating the impact of aquifer layer properties on geomechanical response during CO2 geological sequestration

    SciTech Connect (OSTI)

    Bao, Jie; Xu, Zhijie; Lin, Guang; Fang, Yilin

    2013-04-01T23:59:59.000Z

    Numerical models play an essential role in understanding the facts of carbon dioxide (CO2) geological sequestration in the life cycle of a storage reservoir. We present a series of test cases that reflect a broad and realistic range of aquifer reservoir properties to systematically evaluate and compare the impacts on the geomechanical response to CO2 injection. In this study, a coupled hydro-mechanical model was introduced to simulate the sequestration process, and a quasi-Monte Carlo sampling method was introduced to efficiently sample the value of aquifer properties and geometry parameters. Aquifer permeability was found to be of significant importance to the geomechanical response to the injection. To study the influence of uncertainty of the permeability distribution in the aquifer, an additional series of tests is presented, based on a default permeability distribution site sample with various distribution deviations generated by the Monte Carlo sampling method. The results of the test series show that different permeability distributions significantly affect the displacement and possible failure zone.

  20. Analysis of No-Flow Boundaries in Mixed Unconfined-Confined Aquifer Systems

    E-Print Network [OSTI]

    Langerlan, Kent A.

    2010-07-14T23:59:59.000Z

    investigated before and is the focus of this thesis. The objective of this thesis is to use both analytical and numerical modeling to investigate groundwater flow in an unconfined-confined aquifer including the no-flow lateral boundary effect and the regional...

  1. Chloride Analysis of the Soils Overlaying the Carrizo-Wilcox Aquifer

    E-Print Network [OSTI]

    Wolf, Emery

    2013-09-28T23:59:59.000Z

    With a vast amount of people living in semi-arid to arid environments around the globe, the resource of water is valued very highly. The Carrizo-Wilcox aquifer in SW Texas is a semi-arid zone and was chosen as the site for this study. The Chloride...

  2. Using tracer experiments to determine deep saline aquifers caprocks transport characteristics for carbon dioxide storage

    E-Print Network [OSTI]

    Boyer, Edmond

    for carbon dioxide storage P. Bachaud1,2 , Ph. Berne1 , P. Boulin1,3,4 , F. Renard5,6 , M. Sardin2 , J caprocks from a deep saline aquifer in the Paris basin. Introduction Storage of carbon dioxide in deep bubble. Determination of the diffusion properties is also required since they will govern how dissolved

  3. Groundwater flow to a horizontal or slanted well in an unconfined aquifer

    E-Print Network [OSTI]

    Zhan, Hongbin

    groundwater, vapor, or oil improves the effective recovery of fluids. In a case study in a thin oil reservoir with the horizontal aquifer units; (4) drilling oper- ations are feasible near the ground surfaces that are obstructed equal to that of 10 vertical wells. In the petroleum industry, horizontal wells improve oil recovery

  4. Monitoring aquifer storage and recovery using multiple geophysical methods , Kristofer Davis

    E-Print Network [OSTI]

    -gravity methods to monitor an aquifer storage recovery (ASR) project. An abandoned coal mine has been developed into an underground water reservoir in Leyden, Colorado. Excess water from surface sources is injected into the reservoir during winter and then retrieved for use in the summer. Understanding the storage-recovery process

  5. Siderite zonation within the Brent Group: microbial influence or aquifer flow?

    E-Print Network [OSTI]

    Haszeldine, Stuart

    isotopic data (n = 32) to determine which of these two controls (i.e. biochemistry or pore-water flowSiderite zonation within the Brent Group: microbial influence or aquifer flow? M. WILKINSON1 , *, R versa. There is a strong facies control upon siderite formation, with ripple cross-laminated sands being

  6. The Economics of CO2 Transport by Pipeline and Storage in Saline Aquifers and Oil Reservoirs

    E-Print Network [OSTI]

    The Economics of CO2 Transport by Pipeline and Storage in Saline Aquifers and Oil Reservoirs Sean T Description Date 0 Original document 1/29/2008 1 Estimate for carbon content of crude oil was incorrect (see p an invaluable summer at the Bureau of Economic Geology at the University of Texas at Austin working with Sue

  7. Air and water flows in a large sand box with a two-layer aquifer system

    E-Print Network [OSTI]

    Jiao, Jiu Jimmy

    Air and water flows in a large sand box with a two-layer aquifer system Xingxing Kuang & Jiu Jimmy negative air pressure can be generated in the vadose zone during pumping. The negative air pressure. The initial water-table depth has a significant effect on the generated negative air pressure. The shallower

  8. Vadose zone influences on aquifer parameter estimates of saturated-zone hydraulic theory

    E-Print Network [OSTI]

    Szilagyi, Jozsef

    Szilagyi* Conservation and Survey Division, University of Nebraska, 113 Nebraska Hall, Lincoln, NE 68588 aquifer properties at the scale of the watershed (Szilagyi et al., 1998). Such work is of the utmost-mail address: jszilagyil@unl.edu (J. Szilagyi). #12;(Fig. 1), and h is the changing phreatic surface

  9. Reactive transport of trace elements and isotopes in the Eutaw coastal plain aquifer, Alabama

    E-Print Network [OSTI]

    Wang, Yang

    geochemistry, mineralogy, and numerical modeling techniques to study the reactive transport of heavy metals ground- water geochemistry. Because the possible biogeochemical reactions in regional aquifers are quite suggest that that elevated metal concentrations may be derived from bacterial iron and manganese reduction

  10. Airflow induced by pumping tests in unconfined aquifer with a low-permeability cap

    E-Print Network [OSTI]

    Jiao, Jiu Jimmy

    Airflow induced by pumping tests in unconfined aquifer with a low-permeability cap Jiu Jimmy Jiao1 October 2009. [1] Most analytical and numerical models developed to analyze pumping test data focus on saturated flow below the water table. Traditionally the soil above the initial water table prior to pumping

  11. The Different Characteristics of Aquifer Parameters and Their Implications on Pumping-Test Analysis

    E-Print Network [OSTI]

    Jiao, Jiu Jimmy

    The Different Characteristics of Aquifer Parameters and Their Implications on Pumping-Test Analysis and storativity, under constant-rate pumping conditions. A two-way coordinate is such that the conditions implications on pumping-test designs and interpretation. For example, to estimate the parameters

  12. Mineralogical and Microbial Controls on Iron Reduction in a Contaminated Aquifer-Wetland System

    E-Print Network [OSTI]

    Howson, Andrea Melissa

    2011-02-22T23:59:59.000Z

    minerals are important controls on iron reduction in natural systems. For the first phase of this research a series of sequential chemical extractions was performed on a core taken from a landfill-leachate-contaminated wetland-aquifer system at the Norman...

  13. Shell Geologist: "It is Critical to Ensure Protection of Freshwater Aquifer Zones in Marcellus Shale Drilling"

    E-Print Network [OSTI]

    Boyer, Elizabeth W.

    Shell Geologist: "It is Critical to Ensure Protection of Freshwater Aquifer Zones in Marcellus Protection in Marcellus Development Wells, Tioga County," at 4 p.m., Wednesday, Sept. 21. Open to the public, the talk will be held in 117 Earth-Engineering Sciences (EES) Building. While Marcellus natural gas

  14. Chloride Analysis of the Soils Overlaying the Carrizo-Wilcox Aquifer 

    E-Print Network [OSTI]

    Wolf, Emery

    2013-09-28T23:59:59.000Z

    With a vast amount of people living in semi-arid to arid environments around the globe, the resource of water is valued very highly. The Carrizo-Wilcox aquifer in SW Texas is a semi-arid zone and was chosen as the site for this study. The Chloride...

  15. 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

  16. HighResolution Numerical Methods for MicellarPolymer Flooding and Surfactant Enhanced Aquifer Remediation

    E-Print Network [OSTI]

    Trangenstein, John A.

    been used to study the micellar­ polymer flooding process in enhanced oil recovery [12], [18], [19 in practical im­ plementation of enhanced oil recovery techniques at this time, there is increasing interestHigh­Resolution Numerical Methods for Micellar­Polymer Flooding and Surfactant Enhanced Aquifer

  17. Aquifer characterization and groundwater modeling in support of remedial actions at the Weldon Spring Site

    SciTech Connect (OSTI)

    Durham, L.A. [Argonne National Lab., IL (United States); Carman, J.D. [Jacobs Engineering Group, Inc., St. Charles, MO (United States)

    1993-10-01T23:59:59.000Z

    Aquifer characterization studies were performed to develop a hydrogeologic understanding of an unconfined shallow aquifer at the Weldon Spring site west of St. Louis, Missouri. The 88-ha site became contaminated because of uranium and thorium processing and disposal activities that took place from the 1940s through the 1960s. Slug and pumping tests provided valuable information on the lateral distribution of hydraulic conductivities, and packer tests and lithologic information were used to determine zones of contrasting hydrologic properties within the aquifer. A three-dimensional, finite- element groundwater flow model was developed and used to simulate the shallow groundwater flow system at the site. The results of this study show that groundwater flow through the system is predominantly controlled by a zone of fracturing and weathering in the upper portion of the limestone aquifer. The groundwater flow model, developed and calibrated from field investigations, improved the understanding of the hydrogeology and supported decisions regarding remedial actions at the site. The results of this study illustrate the value, in support of remedial actions, of combining field investigations with numerical modeling to develop an improved understanding of the hydrogeology at the site.

  18. An analytical solution of groundwater response to tidal fluctuation in a leaky confined aquifer

    E-Print Network [OSTI]

    Jiao, Jiu Jimmy

    of China. 1. Introduction In most coastal areas, groundwater and seawater are in con- stant communicationAn analytical solution of groundwater response to tidal fluctuation in a leaky confined aquifer Jiu of the solution presented in this paper. This solution is based on a conceptual model under the assumption

  19. Assessment of Managed Aquifer Recharge Site Suitability Using a GIS and Modeling

    E-Print Network [OSTI]

    Fisher, Andrew

    with a regional groundwater model to assess the hydrologic impact of potential MAR placement and operating planning, including evaluation of options for enhancing groundwater resources. Introduction ManagedAssessment of Managed Aquifer Recharge Site Suitability Using a GIS and Modeling by Tess A. Russo1

  20. Geochemical Impacts of Leaking CO2 from Subsurface Storage Reservoirs to Unconfined and Confined Aquifers

    SciTech Connect (OSTI)

    Qafoku, Nikolla; Brown, Christopher F.; Wang, Guohui; Sullivan, E. C.; Lawter, Amanda R.; Harvey, Omar R.; Bowden, Mark

    2013-04-15T23:59:59.000Z

    Experimental research work has been conducted and is undergoing at Pacific Northwest National Laboratory (PNNL) to address a variety of scientific issues related with the potential leaks of the carbon dioxide (CO2) gas from deep storage reservoirs. The main objectives of this work are as follows: • Develop a systematic understanding of how CO2 leakage is likely to influence pertinent geochemical processes (e.g., dissolution/precipitation, sorption/desorption and redox reactions) in the aquifer sediments. • Identify prevailing environmental conditions that would dictate one geochemical outcome over another. • Gather useful information to support site selection, risk assessment, policy-making, and public education efforts associated with geological carbon sequestration. In this report, we present results from experiments conducted at PNNL to address research issues related to the main objectives of this effort. A series of batch and column experiments and solid phase characterization studies (quantitative x-ray diffraction and wet chemical extractions with a concentrated acid) were conducted with representative rocks and sediments from an unconfined, oxidizing carbonate aquifer, i.e., Edwards aquifer in Texas, and a confined aquifer, i.e., the High Plains aquifer in Kansas. These materials were exposed to a CO2 gas stream simulating CO2 gas leaking scenarios, and changes in aqueous phase pH and chemical composition were measured in liquid and effluent samples collected at pre-determined experimental times. Additional research to be conducted during the current fiscal year will further validate these results and will address other important remaining issues. Results from these experimental efforts will provide valuable insights for the development of site-specific, generation III reduced order models. In addition, results will initially serve as input parameters during model calibration runs and, ultimately, will be used to test model predictive capability and competency. The results from these investigations will provide useful information to support site selection, risk assessment, and public education efforts associated with geological, deep subsurface CO2 storage and sequestration.

  1. Biotransformation involved in sustained reductive removal of uranium in contaminant aquifers

    SciTech Connect (OSTI)

    Lovley, Derek R.

    2005-06-01T23:59:59.000Z

    This report summarizes progress made from August 2004 to July 2005. During this period research focused primarily on obtaining a better understanding of the factors controlling the reduction of U(VI) during in situ uranium bioremediation as well as investigating the potential for using electrodes as an alternative electron donor to promote in situ uranium reduction. Analysis of the 2003 experiment at the field study site in Rifle, CO was completed. The results demonstrated the substantial heterogeneity of the zone undergoing bioremediation, both in terms of geochemistry and microbiology. The lack of U(VI) reduction under sulfate-reducing conditions was clearly documented. The need for more detailed sampling both with time and with depth in the aquifer was demonstrated. For the first time a comparison between the composition of the microbial community in the sediments and the microbes in the corresponding groundwater was attempted. The findings from this study are important not only in further demonstrating the potential for in situ uranium bioremediation, but also for indicating how methods and sampling approaches should be improved in the future. A manuscript summarizing these findings has been accepted for publication in Applied and Environmental Microbiology. In summer of 2004 a new field experiment was conducted at the Rifle site. A novel feature of this study was much more intensive sampling in order to better define the progression of microbial processes during in situ uranium bioremediation. The results demonstrated that stimulation of in situ uranium bioremediation with added acetate was a repeatable phenomenon and that U(VI) reduction was clearly linked to the presence and activity of microorganisms in the family Geobacteraceae. A manuscript summarizing these results is in preparation. A surprising result of the field studies at the Rifle site was that although Geobacter species actively reduced U(VI) in the groundwater, removing it from solution, a high percentage of the uranium in sediments was recovered as U(VI). In order to evaluate this further, studies were conducted in which sediments from the Rifle site were incubated under strict anaerobic conditions. This permitted accurate monitoring of the uranium speciation in the sediments as well as in the groundwater over time. When acetate was added to simulate the in situ uranium bioremediation strategy, U(VI) in the groundwater was reduced with a corresponding increase in U(IV) in the sediments. However, the U(VI) in the sediments was not reduced, even after long-term incubations. The resistance of U(VI) adsorbed to sediments to microbial reduction was not previously suspected and has important implications for in situ uranium bioremediation.

  2. Essays in applied microeconomics

    E-Print Network [OSTI]

    Aron-Dine, Aviva

    2012-01-01T23:59:59.000Z

    This dissertation consists of three chapters on topics in applied microeconomics. In the first chapter. I investigate whether voters are more likely to support additional spending on local public services when they perceive ...

  3. Engineering and Applied

    E-Print Network [OSTI]

    Stowell, Michael

    > Computer Science > Electrical, Computer, and Energy Engineering > Mechanical Engineering 11, Computational Science and Engineering, Energy Systems and Environmental Sustainability, Materials ScienceCollege of Engineering and Applied Science Contact Robert H. Davis, Engineering Dean 303

  4. Applying for Research Awards

    E-Print Network [OSTI]

    ... 53.22 KB APPLYING FOR RESEARCH AWARDS The Eastern Bird Banding Association seeks applicants for its annual $500 research awards in aid of research using banding techniques or bird banding data. ...

  5. AQUIFER TESTING AND REBOUND STUDY IN SUPPORT OF THE 100-H DEEP CHROMIUM INVESTIGATION

    SciTech Connect (OSTI)

    SMOOT JL

    2010-11-05T23:59:59.000Z

    The 100-HR-3 Groundwater Operable Unit (OU) second Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA) 5-year review (DOEIRL-2006-20, The Second CERCLA Five-Year Review Report for the Hanford Site) set a milestone to conduct an investigation of deep hexavalent chromium contamination in the sediments of the Ringold upper mud (RUM) unit, which underlies the unconfined aquifer in the 100-H Area. The 5-year review noted that groundwater samples from one deep well extending below the aquitard (i.e., RUM) exceeded both the groundwater standard of 48 parts per billion (ppb) (Ecology Publication 94-06, Model Toxics Control Act Cleanup Statute and Regulation) and the federal drinking water standard of 100 {mu}g/L for hexavalent chromium. The extent of hexavalent chromium contamination in this zone is not well understood. Action 12-1 from the 5-year review is to perform additional characterization of the aquifer below the initial aquitard. Field characterization and aquifer testing were performed in the Hanford Site's 100-H Area to address this milestone. The aquifer tests were conducted to gather data to answer several fundamental questions regarding the presence of the hexavalent chromium in the deep sediments of the RUM and to determine the extent and magnitude of deeper contamination. The pumping tests were performed in accordance with the Description of Work for Aquifer Testing in Support of the 100-H Deep Chromium Investigation (SGW-41302). The specific objectives for the series of tests were as follows: (1) Evaluate the sustainable production of the subject wells using step-drawdown and constant-rate pumping tests. (2) Collect water-level data to evaluate the degree of hydraulic connection between the RUM and the unconfined (upper) aquifer (natural or induced along the well casing). (3) Evaluate the hydraulic properties of a confined permeable layer within the RUM.; (4) Collect time-series groundwater samples during testing to evaluate the extent and persistence of hexavalent chromium in the deeper zones. Use data collected to refine the current conceptual model for the 100-H Area unconfined aquifer and the RUM in this area. (5) Evaluate the concentration 'rebound' in the unconfined aquifer of hexavalent chromium and the contaminants of concern during shutdown of the extraction wells. Measure co-contaminants at the beginning, middle, and end of each pumping test. The RUM is generally considered an aquitard in the 100-HR-3 OU; however, several water-bearing sand layers are present that are confined within the RUM. The current hydrogeologic model for the 100-H Area aquifer system portrays the RUM as an aquitard layer that underlies the unconfined aquifer, which may contain permeable zones, stringers, or layers. These permeable zones may provide pathways for chromium to migrate deeper into the RUM under certain hydrogeologic conditions. One condition may be the discharge of large volumes of cooling water that occurred near the former H Reactor, which caused a mound of groundwater to form 4.9 to 10.1 m (16 to 33 ft) above the natural water table. The cooling water reportedly contained 1 to 2 mglL of hexavalent chromium for corrosion prevention. Three alternate hypotheses for the introduction of hexavalent chromium into the RUM are as follows: (1) Local groundwater with higher concentrations of hexavalent chromium originating from reactor operations at H Reactor was driven by high heads from groundwater mounding in the unconfined aquifer into the RUM via permeable pathways in the upper surface of the RUM. (2) Local groundwater with hexavalent chromium was introduced from the unconfined aquifer via well boreholes, either during drilling or as a result of poor well construction, allowing hydraulic communication between the unconfined aquifer and the RUM. (3) Hexavalent chromium migrated across the Hom area within the more permeable zones of the RUM. The three wells used for the aquifer pumping tests (199-H3-2C, 199-H4-12C, and 199-H4-15CS) exhibit hexavalent chromium contamination in confined aqu

  6. High Resolution Simulation and Characterization of Density-Driven Flow in CO2 Storage in Saline Aquifers

    E-Print Network [OSTI]

    are routinely used to study the process of carbon dioxide (CO2) sequestration in saline aquifers. In this paper TOUGH2-MP. 1. Introduction Geologic carbon dioxide (CO2) sequestration involves injecting CO2

  7. Information Science, Computing, Applied Math

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

    Science, Computing, Applied Math science-innovationassetsimagesicon-science.jpg Information Science, Computing, Applied Math National security depends on science and...

  8. Hydrogeologic characterization of the Hickory Sandstone Aquifer near Camp Air in northern Mason and southern McCulloch counties, Texas

    E-Print Network [OSTI]

    Delaney, Cynthia Daphine

    1990-01-01T23:59:59.000Z

    Hickory Sandstone is the primary source of ground water for the Western Uano Region of Central Texas. Irrigation from the Hickory Aquifer has been intensive for the past 15 years. Available hydrogeologic data for development of a management model... are very limited. Localized detailed studies of the spatial and temporal variations within the aquifer were conducted to provide data for characterization of the ground-water flow system. Field investigations of the Hickory Sandstone included geologic...

  9. The construction and use of aquifer influence functions in determining original gas in place for water-drive gas reservoirs 

    E-Print Network [OSTI]

    Gajdica, Ronald Joseph

    1986-01-01T23:59:59.000Z

    THE CONSTRUCTION AND USE OF AQUIFER INFLUENCE FUNCTIONS IN DETERMINING ORIGINAL GAS IN PLACE FOR WATER-DRIVE GAS RESERVOIRS A Thesis by RONALD JOSEPH GAJDICA Submitted to the Graduate College of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 1986 Major Subject: Petroleum Engineering THE CONSTRUCTION AND USE OF AQUIFER INFLUENCE FUNCTIONS IN DETERMINING ORIGINAL GAS IN PLACE FOR MATER-DRIVE GAS RESERVOIRS A Thesis by RONALD JOSEPH...

  10. Options, knowledge, and satisfaction of Texas residents affected by Edwards Aquifer issues: implications for education and government 

    E-Print Network [OSTI]

    Kinney, Amy Suzette

    1994-01-01T23:59:59.000Z

    OPINIONS, KNOWLEDGE, AND SATISFACTION OF TEXAS RESIDENTS AFFECTED BY EDWARDS AQUIFER ISSUES: IMPLICATIONS FOR EDUCATION AND GOVERNMENT A Thesis by AMY SUZETTE KINNEY Submitted to Texas A&M University in partial fulfillment of the requirements... Education ABSTRACT Opinions, Knowledge, and Satisfaction of Texas Residents Affected by Edwards Aquifer Issues: Implications for Education and Government. (December 1994) Amy Suzette Kinney, B. S. , Tarleton State University Chair of Advisory Committee...

  11. Results of Aquifer Tests Performed Near R-Area, Savannah River Site

    SciTech Connect (OSTI)

    Hiergesell, R.A.

    2001-01-31T23:59:59.000Z

    The aquifer testing described in this report was conducted in response to USEPA comments (WSRC, 1998) on the Rev. 0 R-Reactor Seepage Basins RFI/RI Report (WSRC, 1998a), Appendix G, Groundwater Contaminant Transport Modeling for the R-Reactor Seepage Basins (RRSB)/108-4R Overflow Basin Operable Unit. The R-area regional flow model described in Appendix G of the RFI/RI is based on small-scale and/or indirect measures of hydraulic conductivity, including laboratory tests, slug tests, cone penetration testing (CPT) and lithologic core descriptions. The USEPA proposed and SRS- agreed that large-scale conductivity estimates from multiple well pumping tests would be beneficial for validating the model conductivity field. Overall, the aquifer test results validate the 1998 R-area regional groundwater flow model.

  12. SUSTAINABILITY WHO CAN APPLY

    E-Print Network [OSTI]

    FUNDED BY CALL FOR SUSTAINABILITY RESEARCH STUDENT WHO CAN APPLY Undergraduate and graduate Participate in the Global Change & Sustainability Center's Research Symposium; attend workshops with faculty or publish in the U's student-run sustainability publication to be released in May 2014. Are you conducting

  13. Applied Microbiology and Biotechnology

    E-Print Network [OSTI]

    Alvarez-Cohen, Lisa

    1 23 Applied Microbiology and Biotechnology ISSN 0175-7598 Appl Microbiol Biotechnol DOI 10.1007/s-Cohen #12;1 23 Your article is protected by copyright and all rights are held exclusively by Springer in electronic repositories. If you wish to self-archive your article, please use the accepted manuscript version

  14. Chlorine isotope investigation of natural attenuation of trichloroethene in an aerobic aquifer

    SciTech Connect (OSTI)

    Sturchio, N.C.; Heraty, L.J.; Huang, L.; Holt, B.D.; Abrajano, T.A. Jr. [Argonne National Lab., IL (United States)] [Argonne National Lab., IL (United States); Clausen, J.L. [Lockheed-Martin Energy Services, Inc., Kevil, KY (United States)] [Lockheed-Martin Energy Services, Inc., Kevil, KY (United States)

    1998-10-15T23:59:59.000Z

    Natural attenuation of chlorinated aliphatic hydrocarbons (CAHs) can be an important mechanism for groundwater remediation. It is difficult to determine the effectiveness of natural CAH attenuation from chemical analyses of groundwater samples because mixing, dispersion, and secondary reactions can mask the chemical evidence of attenuation. In this paper, the authors explore the application of stable chlorine isotope ratio measurements as a new tool for evaluating natural attenuation of CAHs. They report stable isotope ratios of chlorine in both trichloroethene (TCE) and inorganic chloride in groundwater from an aerobic aquifer beneath an extensively contaminated industrial site, the Paducah Gaseous Diffusion Plant in western Kentucky. Variations in the concentrations and chlorine isotope ratios of TCE and chloride in the groundwater are consistent with those expected from natural attenuation. These data support a model in which partial TCE degradation occurred in relatively impermeable, clay-rich sediments above the aquifer, and little or no further degradation of TCE occurred within the aquifer. A record of changing conditions within the TCE source area can be inferred from the spatial variation of chlorine isotope ratios for TCE and chloride within the plume.

  15. University of Minnesota aquifer thermal energy storage (ATES) project report on the third long-term cycle

    SciTech Connect (OSTI)

    Hoyer, M.C.; Hallgren, J.P.; Uebel, M.H.; Delin, G.N.; Eisenreich, S.J.; Sterling, R.L.

    1994-12-01T23:59:59.000Z

    The University of Minnesota aquifer thermal energy storage (ATES) system has been operated as a field test facility (FTF) since 1982. The objectives were to design, construct, and operate the facility to study the feasibility of high-temperature ATES in a confined aquifer. Four short-term and two long-term cycles were previously conducted, which provided a greatly increased understanding of the efficiency and geochemical effects of high-temperature aquifer thermal energy storage. The third long-term cycle (LT3) was conducted to operate the ATES system in conjunction with a real heating load and to further study the geochemical impact that heated water storage had on the aquifer. For LT3, the source and storage wells were modified so that only the most permeable portion, the Ironton-Galesville part, of the Franconia-Ironton-Galesville aquifer was used for storage. This was expected to improve storage efficiency by reducing the surface area of the heated volume and simplify analysis of water chemistry results by reducing the number of aquifer-related variables which need to be considered. During LT3, a total volume of 63.2 {times} 10{sup 3} m {sup 3} of water was injected at a rate of 54.95 m{sup 3}/hr into the storage well at a mean temperature of 104.7{degrees}C. Tie-in to the reheat system of the nearby Animal Sciences Veterinary Medicine (ASVM) building was completed after injection was completed. Approximately 66 percent (4.13 GWh) of the energy added to the aquifer was recovered. Approximately 15 percent (0.64 GWh) of the usable (10 building. Operations during heat recovery with the ASVM building`s reheat system were trouble-free. Integration into more of the ASVM (or other) building`s mechanical systems would have resulted in significantly increasing the proportion of energy used during heat recovery.

  16. Applied ALARA techniques

    SciTech Connect (OSTI)

    Waggoner, L.O.

    1998-02-05T23:59:59.000Z

    The presentation focuses on some of the time-proven and new technologies being used to accomplish radiological work. These techniques can be applied at nuclear facilities to reduce radiation doses and protect the environment. The last reactor plants and processing facilities were shutdown and Hanford was given a new mission to put the facilities in a safe condition, decontaminate, and prepare them for decommissioning. The skills that were necessary to operate these facilities were different than the skills needed today to clean up Hanford. Workers were not familiar with many of the tools, equipment, and materials needed to accomplish:the new mission, which includes clean up of contaminated areas in and around all the facilities, recovery of reactor fuel from spent fuel pools, and the removal of millions of gallons of highly radioactive waste from 177 underground tanks. In addition, this work has to be done with a reduced number of workers and a smaller budget. At Hanford, facilities contain a myriad of radioactive isotopes that are 2048 located inside plant systems, underground tanks, and the soil. As cleanup work at Hanford began, it became obvious early that in order to get workers to apply ALARA and use hew tools and equipment to accomplish the radiological work it was necessary to plan the work in advance and get radiological control and/or ALARA committee personnel involved early in the planning process. Emphasis was placed on applying,ALARA techniques to reduce dose, limit contamination spread and minimize the amount of radioactive waste generated. Progress on the cleanup has,b6en steady and Hanford workers have learned to use different types of engineered controls and ALARA techniques to perform radiological work. The purpose of this presentation is to share the lessons learned on how Hanford is accomplishing radiological work.

  17. Predevelopment Water-Level Contours for Aquifers in the Rainier Mesa and Shoshone Mountain area of the Nevada Test Site, Nye County, Nevada

    SciTech Connect (OSTI)

    Joseph M. Fenelon; Randell J. Laczniak; and Keith J. Halford

    2008-06-24T23:59:59.000Z

    Contaminants introduced into the subsurface of the Nevada Test Site at Rainier Mesa and Shoshone Mountain by underground nuclear testing are of concern to the U.S. Department of Energy and regulators responsible for protecting human health and safety. Although contaminants were introduced into low-permeability rocks above the regional flow system, the potential for contaminant movement away from the underground test areas and into the accessible environment is greatest by ground-water transport. The primary hydrologic control on this transport is evaluated and examined through a series of contour maps developed to represent the water-level distribution within each of the major aquifers underlying the area. Aquifers were identified and their extents delineated by merging and analyzing multiple hydrostratigraphic framework models developed by other investigators from existing geologic information. The contoured water-level distribution in each major aquifer was developed from a detailed evaluation and assessment of available water-level measurements. Multiple spreadsheets that accompany this report provide pertinent water-level and geologic data by well or drill hole. Aquifers are mapped, presented, and discussed in general terms as being one of three aquifer types—volcanic aquifer, upper carbonate aquifer, or lower carbonate aquifer. Each of these aquifer types was subdivided and mapped as independent continuous and isolated aquifers, based on the continuity of its component rock. Ground-water flow directions, as related to the transport of test-generated contaminants, were developed from water-level contours and are presented and discussed for each of the continuous aquifers. Contoured water-level altitudes vary across the study area and range from more than 5,000 feet in the volcanic aquifer beneath a recharge area in the northern part of the study area to less than 2,450 feet in the lower carbonate aquifer in the southern part of the study area. Variations in water-level altitudes within any single continuous aquifer range from a few hundred feet in a lower carbonate aquifer to just more than 1,100 feet in a volcanic aquifer. Flow directions throughout the study area are dominantly southward with minor eastward or westward deviations. Primary exceptions are westward flow in the northern part of the volcanic aquifer and eastward flow in the eastern part of the lower carbonate aquifer. Northward flow in the upper and lower carbonate aquifers in the northern part of the study area is possible but cannot be substantiated because data are lacking. Interflow between continuous aquifers is evaluated and mapped to define major flow paths. These flow paths delineate tributary flow systems, which converge to form the regional ground-water flow system. The implications of these tributary flow paths in controlling transport away from the underground test areas at Rainier Mesa and Shoshone Mountain are discussed. The obvious data gaps contributing to uncertainties in the delineation of aquifers and development of water-level contours are identified and evaluated.

  18. Fresh Water Generation from Aquifer-Pressured Carbon Storage: Interim Progress Report

    SciTech Connect (OSTI)

    Aines, R D; Wolery, T J; Hao, Y; Bourcier, W L

    2009-07-22T23:59:59.000Z

    This project is establishing the potential for using brine pressurized by Carbon Capture and Storage (CCS) operations in saline formations as the feedstock for desalination and water treatment technologies including nanofiltration (NF) and reverse osmosis (RO). The aquifer pressure resulting from the energy required to inject the carbon dioxide provides all or part of the inlet pressure for the desalination system. Residual brine would be reinjected into the formation at net volume reduction. This process provides additional storage space (capacity) in the aquifer, reduces operational risks by relieving overpressure in the aquifer, and provides a source of low-cost fresh water to offset costs or operational water needs. Computer modeling and laboratory-scale experimentation are being used to examine mineral scaling and osmotic pressure limitations for brines typical of CCS sites. Computer modeling is being used to evaluate processes in the aquifer, including the evolution of the pressure field. This progress report deals mainly with our geochemical modeling of high-salinity brines and covers the first six months of project execution (September, 2008 to March, 2009). Costs and implementation results will be presented in the annual report. The brines typical of sequestration sites can be several times more concentrated than seawater, requiring specialized modeling codes typical of those developed for nuclear waste disposal calculations. The osmotic pressure developed as the brines are concentrated is of particular concern, as are precipitates that can cause fouling of reverse osmosis membranes and other types of membranes (e.g., NF). We have now completed the development associated with tasks (1) and (2) of the work plan. We now have a contract with Perlorica, Inc., to provide support to the cost analysis and nanofiltration evaluation. We have also conducted several preliminary analyses of the pressure effect in the reservoir in order to confirm that reservoir pressure can indeed be used to drive the reverse osmosis process. Our initial conclusions from the work to date are encouraging: (1) The concept of aquifer-pressured RO to provide fresh water associated with carbon dioxide storage appears feasible. (2) Concentrated brines such as those found in Wyoming are amenable to RO treatment. We have looked at sodium chloride brines from the Nugget Formation in Sublette County. 20-25% removal with conventional methods is realistic; higher removal appears achievable with NF. The less concentrated sulfate-rich brines from the Tensleep Formation in Sublette County would support >80% removal with conventional RO. (3) Brines from other proposed sequestration sites can now be analyzed readily. An osmotic pressure curve appropriate to these brines can be used to evaluate cost and equipment specifications. (4) We have examined a range of subsurface brine compositions that is potentially pertinent to carbon sequestration and noted the principal compositional trends pertinent to evaluating the feasibility of freshwater extraction. We have proposed a general categorization for the feasibility of the process based on total dissolved solids (TDS). (5) Withdrawing pressurized brine can have a very beneficial effect on reservoir pressure and total available storage capacity. Brine must be extracted from a deeper location in the aquifer than the point of CO{sub 2} injection to prevent CO{sub 2} from migrating to the brine extraction well.

  19. Electrodic voltages accompanying stimulated bioremediation of a uranium-contaminated aquifer

    SciTech Connect (OSTI)

    Williams, K.H.; N'Guessan, A.L.; Druhan, J.; Long, P.E.; Hubbard, S.S.; Lovley, D.R.; Banfield, J.F.

    2009-11-15T23:59:59.000Z

    The inability to track the products of subsurface microbial activity during stimulated bioremediation has limited its implementation. We used spatiotemporal changes in electrodic potentials (EP) to track the onset and persistence of stimulated sulfate-reducing bacteria in a uranium-contaminated aquifer undergoing acetate amendment. Following acetate injection, anomalous voltages approaching -900 mV were measured between copper electrodes within the aquifer sediments and a single reference electrode at the ground surface. Onset of EP anomalies correlated in time with both the accumulation of dissolved sulfide and the removal of uranium from groundwater. The anomalies persisted for 45 days after halting acetate injection. Current-voltage and current-power relationships between measurement and reference electrodes exhibited a galvanic response, with a maximum power density of 10 mW/m{sup 2} during sulfate reduction. We infer that the EP anomalies resulted from electrochemical differences between geochemically reduced regions and areas having higher oxidation potential. Following the period of sulfate reduction, EP values ranged from -500 to -600 mV and were associated with elevated concentrations of ferrous iron. Within 10 days of the voltage decrease, uranium concentrations rebounded from 0.2 to 0.8 {mu}M, a level still below the background value of 1.5 {mu}M. These findings demonstrate that EP measurements provide an inexpensive and minimally invasive means for monitoring the products of stimulated microbial activity within aquifer sediments and are capable of verifying maintenance of redox conditions favorable for the stability of bioreduced contaminants, such as uranium.

  20. Single-well tracer methods for hydrogeologic evaluation of target aquifers

    SciTech Connect (OSTI)

    Hall, S.H.

    1994-11-01T23:59:59.000Z

    Designing an efficient well field for an aquifer thermal energy storage (ATES) project requires measuring local groundwater flow parameters as well as estimating horizontal and vertical inhomogeneity. Effective porosity determines the volume of aquifer needed to store a given volume of heated or chilled water. Ground-water flow velocity governs the migration of the thermal plume, and dispersion and heat exchange along the flow path reduces the thermal intensity of the recovered plume. Stratigraphic variations in the aquifer will affect plume dispersion, may bias the apparent rate of migration of the plume, and can prevent efficient hydraulic communication between wells. Single-well tracer methods using a conservative flow tracer such as bromide, along with pumping tests and water-level measurements, provide a rapid and cost-effective means for estimating flow parameters. A drift-and-pumpback tracer test yields effective porosity and flow velocity. Point-dilution tracer testing, using new instrumentation for downhole tracer measurement and a new method for calibrating the point-dilution test itself, yields depth-discrete hydraulic conductivity as it is affected by stratigraphy, and can be used to estimate well transmissivity. Experience in conducting both drift-and-pumpback and point-dilution tests at three different test sites has yielded important information that highlights both the power and the limitations of the single-well tracer methods. These sites are the University of Alabama Student Recreation Center (UASRC) ATES well field and the VA Medical Center (VA) ATES well field, both located in Tuscaloosa, Alabama, and the Hanford bioremediation test site north of Richland, Washington.

  1. Well injectivity during CO2 storage operations in deep saline aquifers6 1: Experimental investigation of drying effects, salt precipitation and7

    E-Print Network [OSTI]

    Boyer, Edmond

    Carbon Capture and Storage (CCS) is a technique than can potentially limit the accumulation29-17Jan2014 #12;3 1. Introduction51 52 Geological sequestration of CO2 into deep saline aquifers studied54 much less than mature oil & gas reservoirs. Injection of carbon dioxide into saline aquifers55

  2. Experimental assessment of CO2-mineral-toxic ion interactions in a1 simplified freshwater aquifer: Implications for CO2 leakage from deep2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Experimental assessment of CO2-mineral-toxic ion interactions in a1 simplified freshwater aquifer: Implications for CO2 leakage from deep2 geological storage3 4 German Montes-Hernandez*a , François Renarda, b : 10.1021/es3053448 #12;2 Abstract1 The possible intrusion of CO2 into a given freshwater aquifer due

  3. Kinetics of CO2-Fluid-Rock Reactions in a Basalt Aquifer, Soda Springs, Idaho

    E-Print Network [OSTI]

    Maskell, Alexandra; Kampman, Niko; Chapman, Hazel; Condon, Daniel J.; Bickle, Mike

    2015-06-24T23:59:59.000Z

    of the fluvial Salt Lake Formation unconformably above Proterozoic and Palaeozoic rocks characterise this extensional period (e.g. Miller, 1991; Oriel, 1968; Oriel and Platt, 1980; Sacks and Platt, 1985). Several generations of faults cut the Salt Lake... 30.2' ???? ? ??? ??? [1] This gave a bulk hydraulic conductivity of 1.2 x 10-4 ± 1.8 x 10-5 m/min. Uncertainty was calculated using the equations in Appendix A. Drilling conducted by the U.S. Army Engineers (1968) in the upper aquifer...

  4. Geochemistry of the Yegua Aquifer system and its relation to microbial processes

    E-Print Network [OSTI]

    Schlichenmeyer, Jeannette Leone

    1996-01-01T23:59:59.000Z

    in southwestern North Dakota and northwestern South Dakota They noted a decrease in sulfate and an increase in HS- along the hydrologic flow path. In a study of the Black Creek aquifer in South Carolina, Chapelle and McMahon (1991) found evidence that sulfate... in South Carolina, Fredrickson et aL (1991) found higher viable counts in the coarse sands of the Middendorf formation than in the fine sands of the Cape Fear formation, or in lignites and lignite-sands. Also, at the Savannah River Site higher numbers...

  5. Problems of trace element ratios and geothermometry in a gravel geothermal-aquifer system

    SciTech Connect (OSTI)

    Sonderegger, J.L.; Donovan, J.J.; Ruscetta, C.A.; Foley, D. (eds.)

    1981-05-01T23:59:59.000Z

    A Tertiary-age, block-faulted basin in which a Pleistocene gravel bed acts as a confined aquifer and permits the lateral dispersion of the geothermal fluids is studied. Basic data on geology and trace element holes presented previously are reproduced along with fluoride data. Evaluation of the phenomena in this system was attempted using a dissolved silica-enthalpy graph. A chalcedomy curve is also plotted. An enthalpy versus chloride plot suggests that either conductive cooling occurs before mixing or that higher chloride content background waters are available for mixing. (MHR)

  6. Fresh Water Generation from Aquifer-Pressured Carbon Storage: Annual Report FY09

    SciTech Connect (OSTI)

    Wolery, T; Aines, R; Hao, Y; Bourcier, W; Wolfe, T; Haussman, C

    2009-11-25T23:59:59.000Z

    This project is establishing the potential for using brine pressurized by Carbon Capture and Storage (CCS) operations in saline formations as the feedstock for desalination and water treatment technologies including reverse osmosis (RO) and nanofiltration (NF). The aquifer pressure resulting from the energy required to inject the carbon dioxide provides all or part of the inlet pressure for the desalination system. Residual brine is reinjected into the formation at net volume reduction, such that the volume of fresh water extracted balances the volume of CO{sub 2} injected into the formation. This process provides additional CO{sub 2} storage capacity in the aquifer, reduces operational risks (cap-rock fracturing, contamination of neighboring fresh water aquifers, and seismicity) by relieving overpressure in the formation, and provides a source of low-cost fresh water to offset costs or operational water needs. This multi-faceted project combines elements of geochemistry, reservoir engineering, and water treatment engineering. The range of saline formation waters is being identified and analyzed. Computer modeling and laboratory-scale experimentation are being used to examine mineral scaling and osmotic pressure limitations. Computer modeling is being used to evaluate processes in the storage aquifer, including the evolution of the pressure field. Water treatment costs are being evaluated by comparing the necessary process facilities to those in common use for seawater RO. There are presently limited brine composition data available for actual CCS sites by the site operators including in the U.S. the seven regional Carbon Sequestration Partnerships (CSPs). To work around this, we are building a 'catalog' of compositions representative of 'produced' waters (waters produced in the course of seeking or producing oil and gas), to which we are adding data from actual CCS sites as they become available. Produced waters comprise the most common examples of saline formation waters. Therefore, they are expected to be representative of saline formation waters at actual and potential future CCS sites. We are using a produced waters database (Breit, 2002) covering most of the United States compiled by the U.S. Geological Survey (USGS). In one instance to date, we have used this database to find a composition corresponding to the brine expected at an actual CCS site (Big Sky CSP, Nugget Formation, Sublette County, Wyoming). We have located other produced waters databases, which are usually of regional scope (e.g., NETL, 2005, Rocky Mountains basins).

  7. Hydrogen Chemistry of Basalt Aquifers --Treiman et al. 282 (5397): 21... http://www.sciencemag.org/cgi/content/full/282/5397/2194e?maxtosh... 1 of 2 2/19/2008 1:26 PM

    E-Print Network [OSTI]

    Lovley, Derek

    Hydrogen Chemistry of Basalt Aquifers -- Treiman et al. 282 (5397): 21... http. 2194 DOI: 10.1126/science.282.5397.2194e LETTERS Hydrogen Chemistry of Basalt Aquifers In their report "Evidence against hydrogen-based microbial ecosystems in basalt aquifers" (14 Aug., p. 976), Robert T

  8. The construction and use of aquifer influence functions in determining original gas in place for water-drive gas reservoirs

    E-Print Network [OSTI]

    Gajdica, Ronald Joseph

    1986-01-01T23:59:59.000Z

    at the water contact to a unit rate of water influx. For constant water influx rates, the relationship between pressure, flow rate, and the aquifer influence function is given by p - p(t) = q F(t) Terms are defined in the Nomenclature. The pressure... points taken from a continuous curve. See Fig. l. Inspection of the above equations reveals that if the pressure vector and the water flow rate vector are known, then the aquifer influence function vector can be calculated. The pressure vector...

  9. Options, knowledge, and satisfaction of Texas residents affected by Edwards Aquifer issues: implications for education and government

    E-Print Network [OSTI]

    Kinney, Amy Suzette

    1994-01-01T23:59:59.000Z

    : Dr. James E. Christiansen The Edwards Aquifer is an important source of water for the city of San Antonio in Texas. In fact, it is the city's only source of water. Recently, new regulations (Senate Bill 1477) require a limit on the use of water...), to regulate pumping from the eight counties that use the aquifer for their water supply. To determine the public's opinion of this new regulation and to determine concerns over water conservation and water supply, 1, 008 questionnaires were sent to a random...

  10. School of Applied Technology School of Applied Technology

    E-Print Network [OSTI]

    Heller, Barbara

    School of Applied Technology School of Applied Technology Daniel F. and Ada L. Rice Campus Illinois Institute of Technology 201 E. Loop Road Wheaton, IL 60187 630.682.6000 www.iit.edu/applied tech/ Dean and Academic Director, Information Technology and Management Programs: C. Robert Carlson Director of Operations

  11. School of Applied Technology School of Applied Technology

    E-Print Network [OSTI]

    Heller, Barbara

    School of Applied Technology School of Applied Technology Daniel F. and Ada L. Rice Campus Illinois Institute of Technology 201 E. Loop Road Wheaton, IL 60187 630.682.6000 www.iit.edu/applied tech/ Dean Technology and Management Programs: Mazin Safar Director, Marketing & Development: Scott Pfeiffer Director

  12. Flow Instabilities During Injection of CO2 into SalineAquifers

    SciTech Connect (OSTI)

    Garcia, Julio E.; Pruess, Karsten

    2003-04-15T23:59:59.000Z

    Injection of carbon dioxide (CO{sub 2}) into saline aquifers has been proposed as a means to reduce greenhouse gas emissions (geological carbon sequestration). The injection process can be classified as immiscible displacement of an aqueous phase by a less dense and less viscous gas phase. Under disposal conditions (supercritical CO{sub 2}) the viscosity of carbon dioxide can be less than the viscosity of the aqueous phase by a factor of 15. Because of the lower viscosity, the CO{sub 2} displacement front will have a tendency towards instability so that waves or rounded lobes of saturation may appear and grow into fingers that lead to enhanced dissolution, bypassing, and possibly poor sweep efficiency. This paper presents an analysis, through high-resolution numerical simulations, of the onset of instabilities (viscous fingering) during injection of CO{sub 2} into saline aquifers. We explore the influence of viscosity ratio, relative permeability functions, and capillary pressure on finger growth and spacing. In addition, we address the issues of finger triggering, convergence under grid refinement and boundary condition effects. Simulations were carried out on scalar machines, and on an IBM RS/6000 SP (a distributed-memory parallel computer with 6080 processors) with a parallelized version of TOUGH2.

  13. Journal of Computational and Applied Mathematics 208 (2007) 7281 www.elsevier.com/locate/cam

    E-Print Network [OSTI]

    Knowles, Ian W.

    to the process of modelling a groundwater system. In an unconfined aquifer, the problem is more complex because groundwater estimation; Unconfined aquifer 1. Introduction It is common to assume that groundwater flow.elsevier.com/locate/cam The reconstruction of groundwater parameters from head data in an unconfined aquifer Ian Knowlesa, , Aimin Yanb a

  14. Applied inductive learning Louis Wehenkel

    E-Print Network [OSTI]

    Wehenkel, Louis

    problems 20 2.3.1 Classes 20 2.3.2 Types of classi cation problems 20 2.3.3 Learning and test sets 21 2Applied inductive learning Louis Wehenkel University of Li`ege Faculty of Applied Sciences Course;#12;APPLIED INDUCTIVE LEARNING COURSE NOTES : OCTOBER 2000 LOUIS A. WEHENKEL University of Li#12;ege

  15. Applied inductive learning Louis Wehenkel

    E-Print Network [OSTI]

    Wehenkel, Louis

    .3.2 Types of classification problems 20 2.3.3 Learning and test sets 21 2.3.4 Decision or classificationApplied inductive learning Louis Wehenkel University of Liâ??ege Faculty of Applied Sciences Courseâ??e'' #12; #12; APPLIED INDUCTIVE LEARNING COURSE NOTES : OCTOBER 2000 LOUIS A. WEHENKEL University of Li

  16. Journal of Applied Ecology 2004

    E-Print Network [OSTI]

    Holl, Karen

    Journal of Applied Ecology 2004 41, 922­933 © 2004 British Ecological Society Blackwell Publishing-scale, Sacramento River, succession, vegetation Journal of Applied Ecology (2004) 41, 922­933 Introduction More than@ucsc.edu). #12;923 Riparian forest restoration © 2004 British Ecological Society, Journal of Applied Ecology, 41

  17. Journal of Applied Ecology 2002

    E-Print Network [OSTI]

    Holl, Karen

    Journal of Applied Ecology 2002 39, 960­970 © 2002 British Ecological Society Blackwell Science- tion, succession. Journal of Applied Ecology (2002) 39, 960­970 Introduction Efforts to reclaim@ucsc.edu). #12;961 Vegetation on reclaimed mines © 2002 British Ecological Society, Journal of Applied Ecology

  18. Applying Mathematics.... ... to catch criminals

    E-Print Network [OSTI]

    O'Leary, Michael

    Applying Mathematics.... ... to catch criminals Mike O'Leary Department of Mathematics Towson University Stevenson University Kappa Mu Epsion 2008 Mike O'Leary (Towson University) Applying mathematics Department Mike O'Leary (Towson University) Applying mathematics to catch criminals September 10, 2008 2 / 42

  19. A comparison of recharge rates in aquifers of the United States based on groundwater-age data

    E-Print Network [OSTI]

    . McMahon & L. N. Plummer & J. K. Böhlke & S. D. Shapiro & S. R. Hinkle Abstract An overview of recharge in selected unconfined aquifer systems of the United States. Apparent age distributions, numerical hydraulic modeling, water-table fluctuations, stream base-flow separation, and various other types

  20. Degradation rates of CFC-11, CFC-12 and CFC-113 in anoxic shallow aquifers of Araihazar, Bangladesh

    E-Print Network [OSTI]

    Ho, David

    Degradation rates of CFC-11, CFC-12 and CFC-113 in anoxic shallow aquifers of Araihazar, Bangladesh that these compounds are not stable under anaerobic conditions. To determine the degradation rates of CFCs observed in 3 H/3 He dated groundwater were used to estimate degradation rates in the saturated zone

  1. Time-lapse gravity monitoring: A systematic 4D approach with application to aquifer storage and recovery

    E-Print Network [OSTI]

    . An abandoned underground coal mine has been developed into a subsurface water reservoir. Water from surface reservoirs use valuable land needed for develop- ment or the preservation of open space and can have of such reservoirs can reach tens of millions of dollars. The aquifer storage recovery ASR process Pyne, 1995 pro

  2. Hydraulic interference testbetween several doublets in the Dogger aquifer in Ile-de-France region (Val-de-Marne)

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Hydraulic interference testbetween several doublets in the Dogger aquifer in Ile-de-France region of the "thermal breakthrough".One uncertainty of these models is the hydraulic interference between the different of the hydraulic test whichwas carried out in September 2013.The test included 5 geothermal doublets (Cachan 1

  3. High-resolution stratigraphic and structural characterization of the fault-partitioned Hickory Sandstone aquifer system, Mason County, central Texas

    E-Print Network [OSTI]

    Wilson, Jason Steven

    2001-01-01T23:59:59.000Z

    The Hickory Sandstone is an important aquifer in central Texas and is partitioned by faults that impede cross-fault fluid flow. This study provides a detailed stratigraphic and structural model in the vicinity of a normal, oblique-slip fault...

  4. Preliminary delineation of natural geochemical reactions, Snake River Plain aquifer system, Idaho National Engineering Laboratory and vicinity, Idaho

    SciTech Connect (OSTI)

    Knobel, L.L.; Bartholomay, R.C.; Orr, B.R.

    1997-05-01T23:59:59.000Z

    The U.S. Geological Survey, in cooperation with the U.S. Department of Energy, is conducting a study to determine the natural geochemistry of the Snake River Plain aquifer system at the Idaho National Engineering Laboratory (INEL), Idaho. As part of this study, a group of geochemical reactions that partially control the natural chemistry of ground water at the INEL were identified. Mineralogy of the aquifer matrix was determined using X-ray diffraction and thin-section analysis and theoretical stabilities of the minerals were used to identify potential solid-phase reactants and products of the reactions. The reactants and products that have an important contribution to the natural geochemistry include labradorite, olivine, pyroxene, smectite, calcite, ferric oxyhydroxide, and several silica phases. To further identify the reactions, analyses of 22 representative water samples from sites tapping the Snake River Plain aquifer system were used to determine the thermodynamic condition of the ground water relative to the minerals in the framework of the aquifer system. Principal reactions modifying the natural geochemical system include congruent dissolution of olivine, diopside, amorphous silica, and anhydrite; incongruent dissolution of labradorite with calcium montmorillonite as a residual product; precipitation of calcite and ferric oxyhydroxide; and oxidation of ferrous iron to ferric iron. Cation exchange reactions retard the downward movement of heavy, multivalent waste constituents where infiltration ponds are used for waste disposal.

  5. Origin of groundwater salinity and hydrogeochemical processes in the confined Quaternary aquifer of the Pearl River Delta, China

    E-Print Network [OSTI]

    Jiao, Jiu Jimmy

    Origin of groundwater salinity and hydrogeochemical processes in the confined Quaternary aquifer of groundwater salinity and the major hydrogeochemical processes controlling the groundwater evolution­2009, and groundwater samples were collected for major ion (Ca2ţ ; Mg2ţ ; Naţ ; Kţ ; NHţ 4 ; Cl Ŕ ; SO2Ŕ 4 and HCOŔ 3

  6. CROSSWELL SEISMIC REFLECTION IMAGING OF A SHALLOW COBBLE-AND-SAND AQUIFER: AN EXAMPLE FROM THE BOISE HYDROGEOPHYSICAL

    E-Print Network [OSTI]

    Barrash, Warren

    CROSSWELL SEISMIC REFLECTION IMAGING OF A SHALLOW COBBLE-AND- SAND AQUIFER: AN EXAMPLE FROM Crosswell seismic data contain first-arrival information for velocity inversion and reflec- tions for seismic stratigraphic analysis. Seismic velocity information is useful for directly com- paring to

  7. Changes in sources and storage in a karst aquifer during a transition from drought to wet conditions

    E-Print Network [OSTI]

    Banner, Jay L.

    , and used inverse geochemical modeling (PHREEQC) to con- strain controls on groundwater compositions during more storage. Ă? 2012 Elsevier B.V. All rights reserved. 1. Introduction Karst groundwater systems Keywords: Karst Drought Telogenetic Edwards aquifer Groundwater Texas s u m m a r y Understanding

  8. Determining flow, recharge, and vadose zonedrainage in anunconfined aquifer from groundwater strontium isotope measurements, PascoBasin, WA

    SciTech Connect (OSTI)

    mjsingleton@lbl.gov

    2004-06-29T23:59:59.000Z

    Strontium isotope compositions (87Sr/86Sr) measured in groundwater samples from 273 wells in the Pasco Basin unconfined aquifer below the Hanford Site show large and systematic variations that provide constraints on groundwater recharge, weathering rates of the aquifer host rocks, communication between unconfined and deeper confined aquifers, and vadose zone-groundwater interaction. The impact of millions of cubic meters of wastewater discharged to the vadose zone (103-105 times higher than ambient drainage) shows up strikingly on maps of groundwater 87Sr/86Sr. Extensive access through the many groundwater monitoring wells at the site allows for an unprecedented opportunity to evaluate the strontium geochemistry of a major aquifer, hosted primarily in unconsolidated sediments, and relate it to both long term properties and recent disturbances. Groundwater 87Sr/86Sr increases systematically from 0.707 to 0.712 from west to east across the Hanford Site, in the general direction of groundwater flow, as a result of addition of Sr from the weathering of aquifer sediments and from diffuse drainage through the vadose zone. The lower 87Sr/86Sr groundwater reflects recharge waters that have acquired Sr from Columbia River Basalts. Based on a steady-state model of Sr reactive transport and drainage, there is an average natural drainage flux of 0-1.4 mm/yr near the western margin of the Hanford Site, and ambient drainage may be up to 30 mm/yr in the center of the site assuming an average bulk rock weathering rate of 10-7.5 g/g/yr.

  9. Compressed air energy storage: preliminary design and site development program in an aquifer. Final draft, Task 1: establish facility design criteria and utility benefits

    SciTech Connect (OSTI)

    None

    1980-10-01T23:59:59.000Z

    Compressed air energy storage (CAES) has been identified as one of the principal new energy storage technologies worthy of further research and development. The CAES system stores mechanical energy in the form of compressed air during off-peak hours, using power supplied by a large, high-efficiency baseload power plant. At times of high electrical demand, the compressed air is drawn from storage and is heated in a combustor by the burning of fuel oil, after which the air is expanded in a turbine. In this manner, essentially all of the turbine output can be applied to the generation of electricity, unlike a conventional gas turbine which expends approximately two-thirds of the turbine shaft power in driving the air compressor. The separation of the compression and generation modes in the CAES system results in increased net generation and greater premium fuel economy. The use of CAES systems to meet the utilities' high electrical demand requirements is particularly attractive in view of the reduced availability of premium fuels such as oil and natural gas. This volume documents the Task 1 work performed in establishing facility design criteria for a CAES system with aquifer storage. Information is included on: determination of initial design bases; preliminary analysis of the CAES system; development of data for site-specific analysis of the CAES system; detailed analysis of the CAES system for three selected heat cycles; CAES power plant design; and an economic analysis of CAES.

  10. Aquifer thermal energy storage reference manual: seasonal thermal energy storage program

    SciTech Connect (OSTI)

    Prater, L.S.

    1980-01-01T23:59:59.000Z

    This is the reference manual of the Seasonal Thermal Energy Storage (STES) Program, and is the primary document for the transfer of technical information of the STES Program. It has been issued in preliminary form and will be updated periodically to include more technical data and results of research. As the program progresses and new technical data become available, sections of the manual will be revised to incorporate these data. This primary document contains summaries of: the TRW, incorporated demonstration project at Behtel, Alaska, Dames and Moore demonstration project at Stony Brook, New York, and the University of Minnesota demonstration project at Minneapolis-St. Paul, Minnesota; the technical support programs including legal/institutional assessment; economic assessment; environmental assessment; field test facilities; a compendia of existing information; numerical simulation; and non-aquifer STES concepts. (LCL)

  11. Abiotic/Biotic Degradation and Mineralization of N-Nitrosodimethylamine in Aquifer Sediments

    SciTech Connect (OSTI)

    Szecsody, James E.; McKinley, James P.; Breshears, Andrew T.; Crocker, Fiona H.

    2008-10-14T23:59:59.000Z

    The N-nitrosodimethylamine (NDMA) degradation rate and mineralization rate were measured in two aquifer sediments that received treatments to create oxic, reducing, and sequential reducing/oxic environments. Chemically reduced sediments rapidly abiotically degraded NDMA to nontoxic dimethylamine (DMA) to parts per trillion levels, then degraded to further products. NDMA was partially mineralized in reduced sediments (6 to 28 percent) at a slow rate (half-life 3,460 h) by an unknown abiotic/biotic pathway. In contrast, NDMA was mineralized more rapidly (half-life 342 h) and to a greater extent (30 to 81 percent) in oxic sediments with propane addition, likely by a propane monooxygenase pathway. NDMA mineralization in sequential reduced sediment followed by oxic sediment treatment did result in slightly more rapid mineralization and a greater mineralization extent relative to reduced systems. These increases were minor, so aerobic NDMA mineralization with oxygen and propane addition was the most viable in situ NDMA mineralization strategy.

  12. Simulation of Coupled Processes of Flow, Transport, and Storage of CO2 in Saline Aquifers

    SciTech Connect (OSTI)

    Wu, Yu-Shu; Chen, Zizhong; Kazemi, Hossein; Yin, Xiaolong; Pruess, Karsten; Oldenburg, Curt; Winterfeld, Philip; Zhang, Ronglei

    2014-09-30T23:59:59.000Z

    This report is the final scientific one for the award DE- FE0000988 entitled “Simulation of Coupled Processes of Flow, Transport, and Storage of CO2 in Saline Aquifers.” The work has been divided into six tasks. In task, “Development of a Three-Phase Non-Isothermal CO2 Flow Module,” we developed a fluid property module for brine-CO2 mixtures designed to handle all possible phase combinations of aqueous phase, sub-critical liquid and gaseous CO2, supercritical CO2, and solid salt. The thermodynamic and thermophysical properties of brine-CO2 mixtures (density, viscosity, and specific enthalpy of fluid phases; partitioning of mass components among the different phases) use the same correlations as an earlier fluid property module that does not distinguish between gaseous and liquid CO2-rich phases. We verified the fluid property module using two leakage scenarios, one that involves CO2 migration up a blind fault and subsequent accumulation in a secondary “parasitic” reservoir at shallower depth, and another investigating leakage of CO2 from a deep storage reservoir along a vertical fault zone. In task, “Development of a Rock Mechanical Module,” we developed a massively parallel reservoir simulator for modeling THM processes in porous media brine aquifers. We derived, from the fundamental equations describing deformation of porous elastic media, a momentum conservation equation relating mean stress, pressure, and temperature, and incorporated it alongside the mass and energy conservation equations from the TOUGH2 formulation, the starting point for the simulator. In addition, rock properties, namely permeability and porosity, are functions of effective stress and other variables that are obtained from the literature. We verified the simulator formulation and numerical implementation using analytical solutions and example problems from the literature. For the former, we matched a one-dimensional consolidation problem and a two-dimensional simulation of the Mandel-Cryer effect. For the latter, we obtained a good match of temperature and gas saturation profiles, and surface uplift, after injection of hot fluid into a model of a caldera structure. In task, “Incorporation of Geochemical Reactions of Selected Important Species,” we developed a novel mathematical model of THMC processes in porous and fractured saline aquifers, simulating geo-chemical reactions associated with CO2 sequestration in saline aquifers. Two computational frameworks, sequentially coupled and fully coupled, were used to simulate the reactions and transport. We verified capabilities of the THMC model to treat complex THMC processes during CO2 sequestration by analytical solutions and we constructed reactive transport models to analyze the THMC process quantitatively. Three of these are 1D reactive transport under chemical equilibrium, a batch reaction model with equilibrium chemical reactions, and a THMC model with CO2 dissolution. In task “Study of Instability in CO2 Dissolution-Diffusion-Convection Processes,” We reviewed literature related to the study of density driven convective flows and on the instability of CO2 dissolution-diffusion-convection processes. We ran simulations that model the density-driven flow instability that would occur during CO2 sequestration. CO2 diffused through the top of the system and dissolved in the aqueous phase there, increasing its density. Density fingers formed along the top boundary, and coalesced into a few prominent ones, causing convective flow that forced the fluid to the system bottom. These simulations were in two and three dimensions. We ran additional simulations of convective mixing with density contrast caused by variable dissolved CO2 concentration in saline water, modeled after laboratory experiments in which supercritical CO2 was circulated in the headspace above a brine saturated packed sand in a pressure vessel. As CO2 dissolved into the upper part of the saturated sand, liquid phase density increases causing instability and setting off convective mixing. We obtained good agreement

  13. Effect of immiscible liquid contaminants on P-wave transmission through natural aquifer samples

    SciTech Connect (OSTI)

    Geller, Jil T.; Ajo-Franklin, Jonathan B.; Majer, Ernest L.

    2003-01-31T23:59:59.000Z

    We performed core-scale laboratory experiments to examine the effect of non-aqueous phase liquid (NAPL) contaminants on P-wave velocity and attenuation in heterogeneous media. This work is part of a larger project to develop crosswell seismic methods for minimally invasive NAPL detection. The test site is the former DOE Pinellas Plant in Florida, which has known NAPL contamination in the surficial aquifer. Field measurements revealed a zone of anomalously high seismic attenuation, which may be due to lithology and/or contaminants (NAPL or gas phase). Intact core was obtained from the field site, and P-wave transmission was measured by the pulse-transmission technique with a 500 kHz transducer. Two types of samples were tested: a clean fine sand from the upper portion of the surficial aquifer, and clayey-silty sand with shell fragments and phosphate nodules from the lower portion. Either NAPL trichloroethene or toluene was injected into the initially water-saturated sample. Maximum NAPL saturations ranged from 30 to 50% of the pore space. P-wave velocity varied by approximately 4% among the water-saturated samples, while velocities decreased by 5 to 9% in samples at maximum NAPL saturation compared to water-saturated conditions. The clay and silt fraction as well as the larger scatterers in the clayey-silty sands apparently caused greater P-wave attenuation compared to the clean sand. The presence of NAPLs caused a 34 to 54% decrease in amplitudes of the first arrival. The central frequency of the transmitted energy ranged from 85 to 200 kHz, and was sensitive to both grain texture and presence of NAPL. The results are consistent with previous trends observed in homogeneous sand packs. More data will be acquired to interpret P-wave tomograms from crosswell field measurements, determine the cause of high attenuation observed in the field data and evaluate the sensitivity of seismic methods for NAPL detection.

  14. Spatial and temporal dynamics of the microbial community in the Hanford unconfined aquifer

    SciTech Connect (OSTI)

    Lin, Xueju; McKinley, James P.; Resch, Charles T.; Kaluzny, Rachael M.; Lauber, C.; Fredrickson, Jim K.; Knight, Robbie C.; Konopka, Allan

    2012-03-29T23:59:59.000Z

    Pyrosequencing analysis of 16S rRNA genes was used to study temporal dynamics of groundwater Bacteria and Archaea over 10 months within 3 well clusters separated by ~30 m and located 250 m from the Columbia River on the Hanford Site, WA. Each cluster contained 3 wells screened at different depths ranging from 10 to 17 m that differed in hydraulic conductivities. Representative samples were selected for analyses of prokaryotic 16S and eukaryotic 18S rRNA gene copy numbers. Temporal changes in community composition occurred in all 9 wells over the 10 month sampling period. However, there were particularly strong effects near the top of the water table when the seasonal rise in the Columbia River caused river water intrusion at the top of the aquifer. The occurrence and disappearance of some microbial assemblages (such as Actinobacteria ACK-M1) were correlated to river water intrusion. This seasonal impact on microbial community structure was greater in the shallow saturated zone than deeper in the aquifer. Spatial and temporal patterns for several 16S rRNA gene operational taxonomic units associated with particular physiological functions (e.g.methane oxidizers and metal reducers) suggests dynamic changes in fluxes of electron donors and acceptors over an annual cycle. In addition, temporal dynamics in eukaryotic 18S rRNA gene copies and the dominance of protozoa in 18S clone libraries suggest that bacterial community dynamics could be affected not only by the physical and chemical environment, but also by top-down biological control.

  15. APPLIED TECHNOLOGY Strategic Plan Summary

    E-Print Network [OSTI]

    Heller, Barbara

    and collaborative technology-based support for the proposed Innovation Center and the Entrepreneurship Academy. We research centers­CNR, CPI, and CSP. Establish a food safety and processing technology hub/incubator/innovationSCHOOL OF APPLIED TECHNOLOGY Strategic Plan Summary #12;School of Applied Technology Strategic Plan

  16. Scaling of capillary trapping in unstable two-phase flow: Application to CO[subscript 2] sequestration in deep saline aquifers

    E-Print Network [OSTI]

    Szulczewski, Michael L.

    The effect of flow instabilities on capillary trapping mechanisms is a major source of uncertainty in CO2 sequestration in deep saline aquifers. Standard macroscopic models of multiphase flow in porous media are unable to ...

  17. Spatial and temporal controls on biogeochemical indicators at the small-scale interface between a contaminated aquifer and wetland surface water

    E-Print Network [OSTI]

    Baez-Cazull, Susan Enid

    2009-05-15T23:59:59.000Z

    from three locations exhibiting upward, downward, and negligent hydrologic flow between aquifer and wetland. PCA was used to identify the principal biogeochemical processes and to obtain factor scores for evaluating significant seasonal and hydrological...

  18. The Footprint of the CO[subscript 2] Plume during Carbon Dioxide Storage in Saline Aquifers: Storage Efficiency for Capillary Trapping at the Basin Scale

    E-Print Network [OSTI]

    Juanes, Ruben

    We study a sharp-interface mathematical model of CO[subscript 2] migration in deep saline aquifers, which accounts for gravity override, capillary trapping, natural groundwater flow, and the shape of the plume during the ...

  19. Department of Applied Mathematics Department of Applied Mathematics

    E-Print Network [OSTI]

    Heller, Barbara

    , computational mathematics, discrete applied mathematics, and stochas- tics. More detailed descriptions of Philosophy in Collegiate Mathematics Education (joint program with the Department of Mathematics and Science Education) Research Facilities The department provides students with office space equipped with computers

  20. Modeling applied to problem solving

    E-Print Network [OSTI]

    Pawl, Andrew

    We describe a modeling approach to help students learn expert problem solving. Models are used to present and hierarchically organize the syllabus content and apply it to problem solving, but students do not develop and ...

  1. IIT SCHOOL OF APPLIED TECHNOLOGY

    E-Print Network [OSTI]

    Heller, Barbara

    INDUSTRIAL TECHNOLOGY AND MANAGEMENT IIT SCHOOL OF APPLIED TECHNOLOGY PREPARING SKILLED INDIVIDUALS, INDUSTRIAL FACILITIES, SUPPLY CHAIN MANAGEMENT, SUSTAINABILITY AND MANUFACTURING TECHNOLOGY. #12;BE ONE to assess, implement, and utilize current technologies, and to learn how to manage industrial operations

  2. Sustainable FACULTY OF APPLIED SCIENCE

    E-Print Network [OSTI]

    Michelson, David G.

    Working Together Towards a Sustainable Energy Future FACULTY OF APPLIED SCIENCE Clean Energy aspects of sustainable energy solutions, and is committed to using its extensive expertise to serve, Electrical & Computer, Materials, Mechanical, Mining), the School of Architecture & Landscape Architecture

  3. Analysis of volatile organic compounds (VOCs) in A/M Area Crouch Branch (Cretaceous) Aquifer characterization samples: 1993

    SciTech Connect (OSTI)

    Looney, B.B.; Haselow, J.S.; Keenan, M.A.; Van Pelt, R.; Eddy-Dilek, C.A.; Rossabi, J.; Simmons, J.L.

    1993-12-06T23:59:59.000Z

    Samples were collected during the A/M Area Crouch Branch (Cretaceous) Aquifer Characterization (Phase I) Program. The samples were analyzed for chlorinated VOCs by the Savannah River Technology Center (SRTC) and MicroSeeps Ltd. All samples were sealed in the field immediately upon retrieval of the core and subsampling. A total of 113 samples locations were selected for analysis. The Environmental Sciences Section (ESS) of SRTC analyzed all locations in duplicate (226 samples). MicroSeeps Ltd was selected as the quality assurance (QA) check laboratory. MicroSeeps Ltd analyzed 40 locations with 4 duplicates (44 samples). The samples were collected from seven boreholes in A/M Area in the interval from 200 feet deep to the total depth of the boring (360 feet deep nominal); samples were collected every 10 feet within this interval. The sampling zone corresponds approximately to the Crouch Branch Aquifer in A/M Area. The overall A/M Area Crouch Branch Aquifer characterization objectives, a brief description of A/M Area geology and hydrology, and the sample locations, field notes, driller lithologic logs, and required procedural documentation are presented in WSRC (1993).

  4. CX-009420: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Additive Manufacturing Using EOSINT M280 CX(s) Applied: None applied. Date: 10/30/2012 Location(s): Missouri Offices(s): Kansas City Site Office

  5. CX-009418: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Electron Beam Melting CX(s) Applied: None applied. Date: 10/30/2012 Location(s): Missouri Offices(s): Kansas City Site Office

  6. CX-010574: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination Applied Materials - Kerf-less Crystaline-Silicon Photovoltaic: Gas to Modules CX(s) Applied: B3.6 Date: 05162013 Location(s): California,...

  7. CX-009419: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Magnetic Pulser CX(s) Applied: None applied. Date: 10/30/2012 Location(s): Missouri Offices(s): Kansas City Site Office

  8. Site-specific investigations of aquifer thermal energy storage for space and process cooling

    SciTech Connect (OSTI)

    Brown, D R; Hattrup, M P; Watts, R L

    1991-08-01T23:59:59.000Z

    The Pacific Northwest Laboratory (PNL) has completed three preliminary site-specific feasibility studies that investigated using aquifer thermal energy storage (ATES) to reduce space and process cooling costs. Chilled water stored in an ATES system could be used to meet all or part of the process and/or space cooling loads at the three facilities investigated. The work was sponsored by the US Department of Energy's (DOE) Office of Energy Management. The ultimate goal of DOE's Thermal Energy Storage Program is to successfully transfer ATES technology to industrial and commercial sectors. The primary objective of this study was to identify prospective sites and determine the technical and economic feasibility of implementing chill ATES technology. A secondary objective was to identify site-specific factors promoting or inhibiting the application of chill ATES technology so that other potentially attractive sites could be more easily identified and evaluated. A preliminary investigation of the feasibility of commercializing chill ATES in automotive assembly facilities was completed. The results suggested that automotive assembly facilities was completed. The results suggested that automotive assembly facilities represent a good entry market for chill ATES, if the system is cost-effective. As a result, this study was undertaken to identify and evaluate prospective chill ATES applications in the automotive industry. The balance of the report contains two main sections. Section 2.0 describes the site identification process. Site feasibility is addressed in Section 3.0. Overall study conclusions and recommendations are than presented in Section 4.0.

  9. Single-cell genomics reveal metabolic strategies for microbial growth and survival in an oligotrophic aquifer

    SciTech Connect (OSTI)

    Wilkins, Michael J.; Kennedy, David W.; Castelle, Cindy; Field, Erin; Stepanauskas, Ramunas; Fredrickson, Jim K.; Konopka, Allan

    2014-02-01T23:59:59.000Z

    Bacteria from the genus Pedobacter are a major component of microbial assemblages at Hanford Site and have been shown to significantly change in abundance in response to the subsurface intrusion of Columbia River water. Here we employed single cell genomics techniques to shed light on the physiological niche of these microorganisms. Analysis of four Pedobacter single amplified genomes (SAGs) from Hanford Site sediments revealed a chemoheterotrophic lifestyle, with the potential to exist under both aerobic and microaerophilic conditions via expression of both aa3­?type and cbb3-type cytochrome c oxidases. These SAGs encoded a wide-range of both intra-and extra­-cellular carbohydrate-active enzymes, potentially enabling the degradation of recalcitrant substrates such as xylan and chitin, and the utilization of more labile sugars such as mannose and fucose. Coupled to these enzymes, a diversity of transporters and sugar-binding molecules were involved in the uptake of carbon from the extracellular local environment. The SAGs were enriched in TonB-dependent receptors (TBDRs), which play a key role in uptake of substrates resulting from degradation of recalcitrant carbon. CRISPR-Cas mechanisms for resisting viral infections were identified in all SAGs. These data demonstrate the potential mechanisms utilized for persistence by heterotrophic microorganisms in a carbon-limited aquifer, and hint at potential linkages between observed Pedobacter abundance shifts within the 300 Area subsurface and biogeochemical shifts associated with Columbia River water intrusion.

  10. Analysis of Fault Permeability Using Mapping and Flow Modeling, Hickory Sandstone Aquifer, Central Texas

    SciTech Connect (OSTI)

    Nieto Camargo, Jorge E., E-mail: jorge.nietocamargo@aramco.com; Jensen, Jerry L., E-mail: jjensen@ucalgary.ca [University of Calgary, Department of Chemical and Petroleum Engineering (Canada)

    2012-09-15T23:59:59.000Z

    Reservoir compartments, typical targets for infill well locations, are commonly created by faults that may reduce permeability. A narrow fault may consist of a complex assemblage of deformation elements that result in spatially variable and anisotropic permeabilities. We report on the permeability structure of a km-scale fault sampled through drilling a faulted siliciclastic aquifer in central Texas. Probe and whole-core permeabilities, serial CAT scans, and textural and structural data from the selected core samples are used to understand permeability structure of fault zones and develop predictive models of fault zone permeability. Using numerical flow simulation, it is possible to predict permeability anisotropy associated with faults and evaluate the effect of individual deformation elements in the overall permeability tensor. We found relationships between the permeability of the host rock and those of the highly deformed (HD) fault-elements according to the fault throw. The lateral continuity and predictable permeability of the HD fault elements enhance capability for estimating the effects of subseismic faulting on fluid flow in low-shale reservoirs.

  11. Preliminary hydrogeologic framework of the Silurian and Devonian carbonate aquifer system in the Midwestern Basins and Arches Region of Indiana, Ohio, Michigan, and Illinois

    SciTech Connect (OSTI)

    Casey, G.D. (Geological Survey, Columbus, OH (United States))

    1992-01-01T23:59:59.000Z

    The aquifer and confining units have been identified; data on the thickness, extent, and structural configuration of these units have been collected; and thickness and structure-contour maps have been generated. Hydrologic information for the confining units and the aquifer also has been compiled. Where present, the confining unit that caps the carbonate aquifer consists of shales of Middle and Upper Devonian age and Lower Mississippian age, however, these units have been eroded from a large part of the study area. The regional carbonate aquifer consists of Silurian and Devonian limestones and dolomites. The rocks that comprise the aquifer in Indiana and northwestern Illinois are grouped into four major stratigraphic units: Brassfield and Sexton Creek Limestones or the Cataract Formation, the Salamonie Dolomite, the Salina Group, and the Detroit River and Traverse Formations or the Muscatatuck Group. In Ohio and southern Michigan the aquifer is grouped into ten stratigraphic units: Brassfield Limestone and Cataract Formation, the Dayton Limestone, the Rochester Shale equivalent, the Lockport Dolomite, the Salina Formation, the Hillsboro Sandstone, the Detroit River Group, the Columbus Limestone, the Delaware Limestone, and the Traverse Formation. The thickness of the carbonate aquifer increases from the contact with the outcropping Ordovician shales in the south-central part of the study area from the contact into the Appalachian Foreland Structural Basin from 0 ft at the contact to more than 700 ft at the eastern boundary of the study area, to more than 1,000 ft beneath Lake Erie and greater than 1,200 ft in southeastern Michigan. At the edge of the Michigan Intercontinental Structural Basin in western Ohio and eastern Indiana, the thickness ranges from 700 to 900 ft. and from 200 ft to 300 ft in south-central Indiana along the northeastern edge of the Illinois Intercontinental Structural Basin.

  12. Journal of Applied Ecology 2006

    E-Print Network [OSTI]

    Thomas, Len

    Journal of Applied Ecology 2006 43, 377­384 © 2006 The Authors. Journal compilation © 2006 British Ecological Society Blackwell Publishing Ltd METHODOLOGICAL INSIGHTS Point transect sampling with traps, Etive House, Beechwood Park, Inverness IV2 3BW, UK Summary 1. The ability to monitor abundance of animal

  13. APPLIED MATHEMATICS AND SCIENTIFIC COMPUTING

    E-Print Network [OSTI]

    Rogina, Mladen

    APPLIED MATHEMATICS AND SCIENTIFIC COMPUTING Brijuni, Croatia June 23{27, 2003. y x Runge's example; Organized by: Department of Mathematics, Unversity of Zagreb, Croatia. Miljenko Maru#20;si#19;c, chairman;simir Veseli#19;c Andro Mikeli#19;c Sponsors: Ministry of Science and Technology, Croatia, CV Sistemi d

  14. Applied Sustainability Political Science 319

    E-Print Network [OSTI]

    Young, Paul Thomas

    1 Applied Sustainability Political Science 319 College of Charleston Spring 2013 Day/Time: TH 1 Address: fisherb@cofc.edu Office: 284 King Street, #206 (Office of Sustainability) Office Hours: by appt sustainability. It will focus on the development of semester-long sustainability projects, from conception

  15. California Energy Commission Apply Today!

    E-Print Network [OSTI]

    including HVAC and thermal energy storage system upgrades, stadium light conversion and a microturbineCalifornia Energy Commission Apply Today! "The College implemented all of the recommended projects Programs Office (916) 654-4147 pubprog@energy.state.ca.us "CEC financing allowed us to install many

  16. implementing bioenergy applied research & development

    E-Print Network [OSTI]

    Northern British Columbia, University of

    1 A Northern Centre for Renewable Energy implementing bioenergy applied research & development to develop local solutions to these challenges by integrating campus operations, education, and research will help the University meet its current and future energy needs, reduce or eliminate our greenhouse gas

  17. System-Scale Model of Aquifer, Vadose Zone, and River Interactions for the Hanford 300 Area - Application to Uranium Reactive Transport

    SciTech Connect (OSTI)

    Rockhold, Mark L.; Bacon, Diana H.; Freedman, Vicky L.; Parker, Kyle R.; Waichler, Scott R.; Williams, Mark D.

    2013-10-01T23:59:59.000Z

    This report represents a synthesis and integration of basic and applied research into a system-scale model of the Hanford 300 Area groundwater uranium plume, supported by the U.S. Department of Energy’s Richland Operations (DOE-RL) office. The report integrates research findings and data from DOE Office of Science (DOE-SC), Office of Environmental Management (DOE-EM), and DOE-RL projects, and from the site remediation and closure contractor, Washington Closure Hanford, LLC (WCH). The three-dimensional, system-scale model addresses water flow and reactive transport of uranium for the coupled vadose zone, unconfined aquifer, and Columbia River shoreline of the Hanford 300 Area. The system-scale model of the 300 Area was developed to be a decision-support tool to evaluate processes of the total system affecting the groundwater uranium plume. The model can also be used to address “what if” questions regarding different remediation endpoints, and to assist in design and evaluation of field remediation efforts. For example, the proposed cleanup plan for the Hanford 300 Area includes removal, treatment, and disposal of contaminated sediments from known waste sites, enhanced attenuation of uranium hot spots in the vadose and periodically rewetted zone, and continued monitoring of groundwater with institutional controls. Illustrative simulations of polyphosphate infiltration were performed to demonstrate the ability of the system-scale model to address these types of questions. The use of this model in conjunction with continued field monitoring is expected to provide a rigorous basis for developing operational strategies for field remediation and for defining defensible remediation endpoints.

  18. Molecular analysis of phosphate limitation in Geobacteraceae during the bioremediation of a uranium-contaminated aquifer

    E-Print Network [OSTI]

    N'Guessan, L.A.

    2010-01-01T23:59:59.000Z

    in Geobacteraceae During the Bioremediation of a Uranium-the effectiveness of bioremediation strategies, especiallywhere trichloroethene bioremediation was applied (Lee et

  19. Geochemical, mineralogical and microbiological characteristics of sediment from a naturally reduced zone in a uranium-contaminated aquifer

    SciTech Connect (OSTI)

    Campbell, Kate M.; Kukkadapu, Ravi K.; Qafoku, Nikolla; Peacock, Aaron D.; Lesher, E.; Williams, Kenneth H.; Bargar, John R.; Wilkins, Michael J.; Figueroa, Linda A.; Ranville, James; Davis, James; Long, Philip E.

    2012-05-23T23:59:59.000Z

    Localized zones or lenses of naturally reduced sediments have the potential to play a significant role in the fate and transport of redox-sensitive metals and metalloids in aquifers. To assess the mineralogy, microbiology, and redox processes that occur in these zones, we examined several cores from a region of naturally occurring reducing conditions in a uranium-contaminated aquifer (Rifle, CO). Sediment samples from a transect of cores ranging from oxic/suboxic Rifle aquifer sediment to naturally reduced sediment were analyzed for uranium and iron content, oxidation state, and mineralogy, reduced sulfur phases, and solid phase organic carbon content using a suite of analytical and spectroscopic techniques on bulk sediment and size fractions. Solid-phase uranium concentrations were higher in the naturally reduced zone, with a high proportion of the uranium present as reduced U(IV). The sediments were also elevated in reduced sulfur phases and Fe(II), indicating it is very likely that U(VI), Fe(III), and sulfate reduction occurred or is occurring in the sediment. The microbial community was assessed using lipid- and DNA-based techniques, and statistical redundancy analysis was performed to determine correlations between the microbial community and the geochemistry. Increased concentration of solid phase organic carbon and biomass in the naturally reduced sediment suggests that natural bioreduction is stimulated by a zone of increased organic carbon concentration associated with fine-grained material and lower permeability to groundwater flow. Characterization of the naturally bioreduced sediment provides an understanding of the natural processes that occur in the sediment under reducing conditions and how they may impact natural attenuation of radionuclides and other redox sensitive materials. Results also suggest the importance of recalcitrant organic carbon for maintaining reducing conditions and uranium immobilization.

  20. Using complex resistivity imaging to infer biogeochemical processes associated with bioremediation of a uranium-contaminated aquifer

    SciTech Connect (OSTI)

    Orozco, A. Flores; Williams, K.H.; Long, P.E.; Hubbard, S.S.; Kemna, A.

    2011-04-01T23:59:59.000Z

    Experiments at the Department of Energy's Rifle Integrated Field Research Challenge (IFRC) site near Rifle, Colorado (USA) have demonstrated the ability to remove uranium from groundwater by stimulating the growth and activity of Geobacter species through acetate amendment. Prolonging the activity of these strains in order to optimize uranium bioremediation has prompted the development of minimally-invasive and spatially-extensive monitoring methods diagnostic of their in situ activity and the end products of their metabolism. Here we demonstrate the use of complex resistivity imaging for monitoring biogeochemical changes accompanying stimulation of indigenous aquifer microorganisms during and after a prolonged period (100+ days) of acetate injection. A thorough raw-data statistical analysis of discrepancies between normal and reciprocal measurements and incorporation of a new power-law phase-error model in the inversion were used to significantly improve the quality of the resistivity phase images over those obtained during previous monitoring experiments at the Rifle IRFC site. The imaging results reveal spatiotemporal changes in the phase response of aquifer sediments, which correlate with increases in Fe(II) and precipitation of metal sulfides (e.g., FeS) following the iterative stimulation of iron and sulfate reducing microorganism. Only modest changes in resistivity magnitude were observed over the monitoring period. The largest phase anomalies (>40 mrad) were observed hundreds of days after halting acetate injection, in conjunction with accumulation of Fe(II) in the presence of residual FeS minerals, reflecting preservation of geochemically reduced conditions in the aquifer - a prerequisite for ensuring the long-term stability of immobilized, redox-sensitive contaminants, such as uranium.

  1. Using complex resistivity imaging to infer biogeochemical processes associated with bioremediation of a uranium-contaminated aquifer

    SciTech Connect (OSTI)

    Flores-Orozco, Adrian; Williams, Kenneth H.; Long, Philip E.; Hubbard, Susan S.; Kemna, Andreas

    2011-07-07T23:59:59.000Z

    Experiments at the Department of Energy’s Rifle Integrated Field Research Challenge (IFRC) site near Rifle, Colorado (USA) have demonstrated the ability to remove uranium from groundwater by stimulating the growth and activity of Geobacter species through acetate amendment. Prolonging the activity of these strains in order to optimize uranium bioremediation has prompted the development of minimally-invasive and spatially-extensive monitoring methods diagnostic of their in situ activity and the end products of their metabolism. Here we demonstrate the use of complex resistivity imaging for monitoring biogeochemical changes accompanying stimulation of indigenous aquifer microorganisms during and after a prolonged period (100+ days) of acetate injection. A thorough raw-data statistical analysis of discrepancies between normal and reciprocal measurements and incorporation of a new power-law phase-error model in the inversion were used to significantly improve the quality of the resistivity phase images over those obtained during previous monitoring experiments at the Rifle IRFC site. The imaging results reveal spatiotemporal changes in the phase response of aquifer sediments, which correlate with increases in Fe(II) and precipitation of metal sulfides (e.g., FeS) following the iterative stimulation of iron and sulfate reducing microorganism. Only modest changes in resistivity magnitude were observed over the monitoring period. The largest phase anomalies (>40 mrad) were observed hundreds of days after halting acetate injection, in conjunction with accumulation of Fe(II) in the presence of residual FeS minerals, reflecting preservation of geochemically reduced conditions in the aquifer – a prerequisite for ensuring the long-term stability of immobilized, redox-sensitive contaminants, such as uranium.

  2. Effect of Ethanol and Methyl-tert-Butyl Ether on Monoaromatic Hydrocarbon Biodegradation: Response Variability for Different Aquifer Materials Under Various Electron-Accepting Conditions

    SciTech Connect (OSTI)

    Ruiz-Aguilar, G L; Fernandez-Sanchez, J M; Kane, S R; Kim, D; Alvarez, P J

    2003-10-06T23:59:59.000Z

    Aquifer microcosms were used to determine how ethanol and methyl-tert-butyl ether (MtBE) affect monoaromatic hydrocarbon degradation under different electron-accepting conditions commonly found in contaminated sites experiencing natural attenuation. Response variability was investigated by using aquifer material from four sites with different exposure history. The lag phase prior to BTEX (benzene, toluene, ethylbenzene, and xylenes) and ethanol degradation was typically shorter in microcosms with previously contaminated aquifer material, although previous exposure did not always result in high degradation activity. Toluene was degraded in all aquifer materials and generally under a broader range of electron-accepting conditions compared to benzene, which was degraded only under aerobic conditions. MtBE was not degraded within 100 days under any condition, and it did not affect BTEX or ethanol degradation patterns. Ethanol was often degraded before BTEX compounds, and had a variable effect on BTEX degradation as a function of electron-accepting conditions and aquifer material source. An occasional enhancement of toluene degradation by ethanol occurred in denitrifying microcosms with unlimited nitrate; this may be attributable to the fortuitous growth of toluene-degrading bacteria during ethanol degradation. Nevertheless, experiments with flow-through aquifer columns showed that this beneficial effect could be eclipsed by an ethanol-driven depletion of electron acceptors, which significantly inhibited BTEX degradation and is probably the most important mechanism by which ethanol could hinder BTEX natural attenuation. A decrease in natural attenuation could increase the likelihood that BTEX compounds reach a receptor as well as the potential duration of exposure.

  3. Applying to Teacher Education Program at Purdue

    E-Print Network [OSTI]

    David Drasin

    2012-12-02T23:59:59.000Z

    Apply to the Teacher Education Program (TEP). Please remember to apply to the TEP(Gate A) if you wish to officially enroll in the. Professional Education ...

  4. Applied Materials | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty EditCalifornia: Energy Resources JumpAnaconda,Anza ElectricInc Jump to:Applied

  5. Ground-water flow and recharge in the Mahomet Bedrock Valley Aquifer, east-central Illinois: A conceptual model based on hydrochemistry

    SciTech Connect (OSTI)

    Panno, S.V.; Hackley, K.C.; Cartwright, K.; Liu, C.L. (Illinois State Geological Survey, Champaign, IL (United States))

    1994-04-01T23:59:59.000Z

    Major-ion and isotopic analyses of ground water have been used to develop a conceptual model of flow and recharge to the Mahomet Bedrock Valley Aquifer (MVA). The MVA is composed of clean, permeable sands and gravels and forms a basal'' fill up to 60 m thick in a buried, west-trending bedrock valley. A thick succession of glacial tills, some containing interbedded lenses of sand and gravel, covers the MVA. Three regions within the MVA have hydrochemically distinct ground-water types. A fourth ground-water type was found at the confluence of the MVA and the Mackinaw Bedrock Valley Aquifer (MAK) to the west.

  6. Applications of geographic information systems (GIS) in decision analysis for monitoring aquifer systems during oilfield development projects

    SciTech Connect (OSTI)

    Blundell, S.; Baldwin, D.O.; Anderson, N.J. [Integrated Geoscience, Inc., Helena, MT (United States)

    1996-06-01T23:59:59.000Z

    Geographic Information Systems (GIS) coupled with numerical ground water models provide a powerful Decision Support System (DSS) and visualization tool for monitoring aquifer systems during oilfield development projects. A GIS is a coupled software/hardware system that stores, processes, and displays a variety of data structures (raster, vector, TIN, CAD) that have been geographically referenced to some common map projection and coordinate system. Georeferencing allows the analyst to integrate diverse types of data layers into thematic maps for analysis of spatial trends and analyses. The integration of quasi 3-D numerical ground water models with GIS provides project managers with a Decision Support System (DSS) to assess potential impacts to aquifer systems during oilfield development projects. The rapid advancement in desktop PC computing power and data storage has allowed software developers to produce 32-bit GIS and data integration software applications. A variety of image processing, GIS, and numerical ground water modeling software will be used to demonstrate techniques for monitoring and visualizing the migration of an oilfield brine plume leaking during an oilfield development project. Emphasis will be placed on the integration of data structures and on database design to create a DSS within a desktop GIS to serve Project Managers during oilfield development.

  7. Predicting the probability of elevated nitrate concentrations in the Puget Sound Basin: Implications for aquifer susceptibility and vulnerability

    SciTech Connect (OSTI)

    Tesoriero, A.J.; Voss, F.D. [Geological Survey, Tacoma, WA (United States). Water Resources Div.

    1997-11-01T23:59:59.000Z

    The occurrence and distribution of elevated nitrate concentrations in ground water in the Puget Sound Basin, Washington, were determined by examining existing data from more than 3,000 wells. Models that estimate the probability that a well has an elevated nitrate concentration were constructed by relating the occurrence of elevated nitrate concentrations to both natural and anthropogenic variables using logistic regression. The variables that best explain the occurrence of elevated nitrate concentrations were well depth, surficial geology, and the percentage of urban and agricultural land within a radius of 3.2 kilometers of the well. From these relations, logistic regression models were developed to assess aquifer susceptibility and ground-water vulnerability. Both models performed well at predicting the probability of elevated nitrate concentrations in an independent data set. This approach to assessing aquifer susceptibility and ground-water vulnerability has the advantages of having both model variables and coefficient values determined on the basis of existing water quality information and does not depend on the assignment of variables and weighting factors based on qualitative criteria.

  8. System Design and Optimization of CO2 Storage in Deep Saline Aquifers

    E-Print Network [OSTI]

    Shamshiri, Hossein

    2012-02-14T23:59:59.000Z

    Optimization of waterflooding sweep efficiency has been widely applied in reservoir engineering to improve hydrocarbon recovery while delaying water breakthrough and minimizing the bypassed oil in reservoirs. We develop a new framework to optimize...

  9. CX-012313: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Chicago Office Technical Support Services Contract CX(s) Applied: A8 Date: 06/13/2014 Location(s): CX: none Offices(s): Chicago Office

  10. CX-007858: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Southwest Solar Transformation Initiative CX(s) Applied: A9, A11 Date: 01/27/2012 Location(s): California Offices(s): Golden Field Office

  11. CX-010367: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Asbestos Abatement Actions CX(s) Applied: B1.16 Date: 11/19/2012 Location(s): Tennessee, California, Virginia Offices(s): Berkeley Site Office

  12. CX-010258: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Bangladesh Meteorological Instrumentation Installation CX(s) Applied: A9 Date: 04/26/2013 Location(s): Colorado Offices(s): Golden Field Office

  13. CX-012632: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    LURR 20140456 - Salmon Creek Avenue Pathway Project CX(s) Applied: B4.9Date: 41885 Location(s): WashingtonOffices(s): Bonneville Power Administration

  14. CX-001373: Categorical Exclusion Determination | Department of...

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

    Analytical Development Tritium Support Laboratory for Mass Spectroscopy, Infrared Spectroscopy, and Raman CX(s) Applied: B3.6 Date: 03102010 Location(s): Aiken,...

  15. CX-004196: Categorical Exclusion Determination | Department of...

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

    6: Categorical Exclusion Determination CX-004196: Categorical Exclusion Determination Infrared and Raman Spectroscopy of Biological Safety Level-1 Biological Samples CX(s) Applied:...

  16. CX-000331: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-000331: Categorical Exclusion Determination Kentucky Revision 2 - Commercial Office Building Retrofit Showcase CX(s) Applied: B1.4, B1.5,...

  17. CX-003518: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-003518: Categorical Exclusion Determination Energy from Biomass Research and Technology Transfer Program CX(s) Applied: B3.6 Date: 08232010...

  18. CX-012089: Categorical Exclusion Determination | Department of...

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

    CX-012089: Categorical Exclusion Determination Wood Pole Testing for 20 Transmission Lines in Southern Arizona and Southern California CX(s) Applied: B3.1 Date: 04172014...

  19. CX-000815: Categorical Exclusion Determination | Department of...

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

    0815: Categorical Exclusion Determination CX-000815: Categorical Exclusion Determination Hydrogen Technology Laboratory 140 - Chromatography, Wet Laboratory CX(s) Applied: B3.6...

  20. CX-009005: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Henderson Solar Energy Project CX(s) Applied: B5.16 Date: 08/22/2012 Location(s): Nevada Offices(s): Golden Field Office

  1. CX-011116: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Sunpath SANFAB CX(s) Applied: B5.16 Date: 08/09/2013 Location(s): Nevada Offices(s): Golden Field Office

  2. CX-012474: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Refractories/Ceramics Project CX(s) Applied: B3.6Date: 41870 Location(s): OregonOffices(s): National Energy Technology Laboratory

  3. CX-005151: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-005151: Categorical Exclusion Determination United States-China Advanced Coal Technologies Consortium - University of Wyoming CX(s) Applied: A9, A11...

  4. CX-005154: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-005154: Categorical Exclusion Determination United States-China Advanced Coal Technologies Consortium - University of Kentucky CX(s) Applied: A9, A11,...

  5. CX-005159: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-005159: Categorical Exclusion Determination United States-China Advanced Coal Technologies Consortium - Indiana Geological Survey CX(s) Applied: A9,...

  6. CX-008691: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Mason Substation Metering Replacement Project CX(s) Applied: B1.7 Date: 06/25/2012 Location(s): Washington Offices(s): Bonneville Power Administration

  7. CX-011237: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Lightspeed Networks Inc. Fiber Installation CX(s) Applied: B4.9 Date: 10/24/2013 Location(s): Oregon Offices(s): Bonneville Power Administration

  8. CX-006471: Categorical Exclusion Determination | Department of...

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

    CX-006471: Categorical Exclusion Determination Air Awareness Campaign Electric Car Charging Station CX(s) Applied: B5.1 Date: 08042011 Location(s): Greenville, South...

  9. CX-000903: Categorical Exclusion Determination | Department of...

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

    903: Categorical Exclusion Determination CX-000903: Categorical Exclusion Determination Smart Grid Photovoltaic Pilot CX(s) Applied: B5.1 Date: 02242010 Location(s): Illinois...

  10. CX-012015: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-012015: Categorical Exclusion Determination Enhanced Wind Resource Assessment with Sonic Ranging and Detection at Tooele Army Depot CX(s) Applied:...

  11. CX-012110: Categorical Exclusion Determination | Department of...

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

    Categorical Exclusion Determination Defense Logistics Agency, Tracy, California, Wind Resource Assessment CX(s) Applied: A9, B3.1 Date: 05072014 Location(s): California...

  12. CX-002753: Categorical Exclusion Determination | Department of...

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

    Determination CX-002753: Categorical Exclusion Determination Gilt Edge Mine Wind Resource Assessment CX(s) Applied: B3.1 Date: 06212010 Location(s): Deadwood, South...

  13. CX-002823: Categorical Exclusion Determination | Department of...

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

    CX-002823: Categorical Exclusion Determination Nebraska College of Technical Agriculture Biomass Facility CX(s) Applied: B5.1 Date: 06242010 Location(s): Curtis, Nebraska...

  14. CX-006074: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-006074: Categorical Exclusion Determination Bay Area Photovoltaics Consortium, Photovoltaic Manufacturing Initiative CX(s) Applied: A9 Date: 0628...

  15. CX-007549: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Harrisonville - Waste Water Treatment Plant CX(s) Applied: B5.1 Date: 01/10/2012 Location(s): Missouri Offices(s): Golden Field Office

  16. CX-007571: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Pulaski County - Wastewater CX(s) Applied: B5.1 Date: 12/29/2011 Location(s): Missouri Offices(s): Golden Field Office

  17. CX-008797: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Coal Pile Basin Project CX(s) Applied: B1.29 Date: 06/04/2012 Location(s): Tennessee Offices(s): Y-12 Site Office

  18. CX-010590: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Kalispell Shunt Cap Addition Project CX(s) Applied: B4.11 Date: 07/01/2013 Location(s): Montana Offices(s): Bonneville Power Administration

  19. CX-008234: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Whole Energy Glycerin Refinery CX(s) Applied: B5.15 Date: 04/20/2012 Location(s): Washington Offices(s): Golden Field Office

  20. CX-011564: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Excess Facilities Deactivation and Demolition CX(s) Applied: B1.23 Date: 11/05/2013 Location(s): Idaho Offices(s): Idaho Operations Office

  1. CX-012724: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Advanced Test Reactor (ATR) Electronic Message Board Installation CX(s) Applied: B1.7Date: 41830 Location(s): IdahoOffices(s): Nuclear Energy

  2. CX-002964: Categorical Exclusion Determination | Department of...

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

    Categorical Exclusion Determination CX-002964: Categorical Exclusion Determination Wind Energy and Sustainable Energy Solutions CX(s) Applied: B3.11, A9 Date: 07092010...

  3. CX-005201: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-005201: Categorical Exclusion Determination Tall Tower Wind Energy Monitoring and Numerical Model Validation in Southern Nevada CX(s) Applied: A9,...

  4. CX-003507: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination State Energy Program American Recovery and Reinvestment Act: Solar Power Incorporated Photovoltaic Panel Manufacturing Facility CX(s) Applied: B1.31,...

  5. CX-012810: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    St. Johns-Keeler Minor Access Road Improvement CX(s) Applied: B1.3Date: 41901 Location(s): OregonOffices(s): Bonneville Power Administration

  6. CX-011368: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    High Temperature Thermal Properties CX(s) Applied: B1.31 Date: 10/23/2013 Location(s): Idaho Offices(s): Idaho Operations Office

  7. CX-011798: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Analytical Physics - Thermal Analysis CX(s) Applied: B3.6 Date: 01/30/2014 Location(s): Oregon Offices(s): National Energy Technology Laboratory

  8. CX-001724: Categorical Exclusion Determination | Department of...

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

    CX-001724: Categorical Exclusion Determination Recovery Act City of Boise Energy Efficiency and Conservation Block Grant (EECBG) CX(s) Applied: B5.1 Date: 04122010...

  9. Categorical Exclusion Determinations: Western Area PowerAdministratio...

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

    Center October 26, 2009 CX-005544: Categorical Exclusion Determination Power Rate Formula for the Provo River Project of the Western Area Power Administration CX(s) Applied:...

  10. CX-012706: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Radiochemistry Laboratory (RCL) Supply Intake Filter Housing CX(s) Applied: B2.5Date: 41858 Location(s): IdahoOffices(s): Nuclear Energy

  11. CX-008684: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Metaline Radio Station Upgrade Project CX(s) Applied: B1.19 Date: 07/11/2012 Location(s): Washington Offices(s): Bonneville Power Administration

  12. CX-009465: Categorical Exclusion Determination | Department of...

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

    Categorical Exclusion Determination Temporal Characterization of Hydrates System Dynamics Beneath Seafloor Mounds: Integrating Time-Lapse CX(s) Applied: B3.6 Date: 10182012...

  13. CX-009462: Categorical Exclusion Determination | Department of...

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

    Categorical Exclusion Determination Temporal Characterization of Hydrates System Dynamics Beneath Seafloor Mounds: Integrating Time-Lapse CX(s) Applied: A9, A11 Date: 1018...

  14. CX-011295: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-011295: Categorical Exclusion Determination Material Dynamics and Kinetics Lab CX(s) Applied: B3.6 Date: 10172013 Location(s): Pennsylvania...

  15. CX-009463: Categorical Exclusion Determination | Department of...

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

    Categorical Exclusion Determination Temporal Characterization of Hydrates System Dynamics Beneath Seafloor Mounds: Integrating Time-Lapse CX(s) Applied: B3.6 Date: 10182012...

  16. CX-009464: Categorical Exclusion Determination | Department of...

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

    Categorical Exclusion Determination Temporal Characterization of Hydrates System Dynamics beneath Seafloor Mounds: Integrating Time-Lapse CX(s) Applied: A9, A11 Date: 1018...

  17. CX-012776: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Catalyst Processing, KCP14-05 CX(s) Applied: NOT NOTEDDate: 41857 Location(s): MissouriOffices(s): Kansas City Site Office

  18. CX-008215: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Small Hydropower Research and Development Technology Project CX(s) Applied: A9 Date: 04/03/2012 Location(s): Colorado Offices(s): Golden Field Office

  19. CX-011535: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    East Grangeville Substation Sale CX(s) Applied: B1.24 Date: 11/14/2013 Location(s): Idaho Offices(s): Bonneville Power Administration

  20. CX-012233: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Shed Acquisition at Kalispell Substation CX(s) Applied: B1.24 Date: 06/09/2014 Location(s): Montana Offices(s): Bonneville Power Administration

  1. CX-012622: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Replace roofing system at 702-F CX(s) Applied: B1.3Date: 41799 Location(s): South CarolinaOffices(s): Savannah River Operations Office

  2. CX-012621: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Replace 730-2B Roof CX(s) Applied: B1.3Date: 41799 Location(s): South CarolinaOffices(s): Savannah River Operations Office

  3. CX-012433: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Computer Simulation and Prototype Construction and Testing CX(s) Applied: A9Date: 41878 Location(s): GeorgiaOffices(s): National Energy Technology Laboratory

  4. CX-010689: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Generic CX Determination for Financial Assistance Awards CX(s) Applied: Unknown Date: 07/17/2013 Location(s): Illinois Offices(s): Chicago Office

  5. Categorical Exclusion (CX) Determinations By Date | Department...

    Office of Environmental Management (EM)

    (CX) Determinations By Date Categorical Exclusion (CX) Determinations By Date August 25, 2015 CX-012469: Categorical Exclusion Determination Gas Analysis Services CX(s) Applied:...

  6. CX-010869: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Nauticas Research Program CX(s) Applied: B3.6 Date: 08/07/2013 Location(s): Illinois Offices(s): Argonne Site Office

  7. CX-012664: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    SBIR/STTR Phase 0 Outreach and Assistance Program CX(s) Applied: A8Date: 41844 Location(s): IllinoisOffices(s): Chicago Office

  8. CX-010581: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Little Shell Property Funding CX(s) Applied: B1.25 Date: 07/16/2013 Location(s): Montana Offices(s): Bonneville Power Administration

  9. CX-011252: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-011252: Categorical Exclusion Determination Concentrating Solar Power Heat Integration for Baseload Renewable Energy Deployment CX(s) Applied: A9...

  10. CX-004374: Categorical Exclusion Determination | Department of...

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

    74: Categorical Exclusion Determination CX-004374: Categorical Exclusion Determination Solar Electric Power for Nonsectarian Educational and Social CX(s) Applied: A9, B5.1 Date:...

  11. CX-011391: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-011391: Categorical Exclusion Determination Municipal Complex Solar Power Project CX(s) Applied: B3.14 Date: 12102013 Location(s): New Jersey...

  12. CX-008507: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-008507: Categorical Exclusion Determination Midwest Regional Carbon Sequestration Partnership - Phase Three CX(s) Applied: B3.1, B5.3 Date: 07162012...

  13. CX-007111: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-007111: Categorical Exclusion Determination Shallow Carbon Sequestration Demonstration Project (Iatan Generating Station) CX(s) Applied: B3.1...

  14. CX-007118: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-007118: Categorical Exclusion Determination Shallow Carbon Sequestration Demonstration Project CX(s) Applied: B3.1 Date: 10042011...

  15. CX-009326: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-009326: Categorical Exclusion Determination Midwest Regional Carbon Sequestration Partnership - Subtask 1.7 CX(s) Applied: B3.1 Date: 09282012...

  16. CX-000591: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination 25A2936 - Carbon Nanotube Membranes for Energy-Efficient Carbon Sequestration CX(s) Applied: B3.6 Date: 12152009 Location(s): California...

  17. CX-003037: Categorical Exclusion Determination | Department of...

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

    Determination CX-003037: Categorical Exclusion Determination Mercury Removal from Clean Coal Processing Air Stream CX(s) Applied: B3.6 Date: 07132010 Location(s): Butte,...

  18. CX-011165: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Heavy Mineral Separation CX(s) Applied: B3.6 Date: 08/07/2013 Location(s): South Carolina Offices(s): Savannah River Operations Office

  19. CX-012716: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    General Scientific Infrastructure Support for University of Wisconsin CX(s) Applied: B1.31Date: 41844 Location(s): WisconsinOffices(s): Nuclear Energy

  20. CX-011115: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Realization of Algae Potential CX(s) Applied: A9 Date: 08/29/2013 Location(s): New Mexico Offices(s): Golden Field Office

  1. CX-007844: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Energy Retrofits CX(s) Applied: B5.1 Date: 12/01/2011 Location(s): Rhode Island Offices(s): Energy Efficiency and Renewable Energy

  2. CX-007689: Categorical Exclusion Determination | Department of...

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

    Tech Research Corporation- Prosumer-Based Distributed Autonomous Cyber-Physical Architecture for Ultra-Reliable Green Electricity Internetworks CX(s) Applied: A9 Date: 1118...

  3. CX-000734: Categorical Exclusion Determination | Department of...

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

    CX-000734: Categorical Exclusion Determination Detection and Production of Methane Hydrates CX(s) Applied: A9 Date: 01222010 Location(s): Stillwater, Oklahoma Office(s):...

  4. CX-000733: Categorical Exclusion Determination | Department of...

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

    CX-000733: Categorical Exclusion Determination Detection and Production of Methane Hydrates CX(s) Applied: A9 Date: 01222010 Location(s): Austin, Texas Office(s): Fossil...

  5. CX-010941: Categorical Exclusion Determination | Department of...

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

    CX-010941: Categorical Exclusion Determination Assessing the Response of Methane Hydrates to Environmental Change at the Svalbard Continental Margin CX(s) Applied: B3.6,...

  6. CX-007388: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-007388: Categorical Exclusion Determination Regional Test Center Project: Solar Technology Acceleration Center (SolarTAC) CX(s) Applied: B1.15,...

  7. CX-012245: Categorical Exclusion Determination | Department of...

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

    5: Categorical Exclusion Determination CX-012245: Categorical Exclusion Determination Hydro Research Foundation University Research Awards - Carnegie Mellon CX(s) Applied: A9 Date:...

  8. CX-012253: Categorical Exclusion Determination | Department of...

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

    3: Categorical Exclusion Determination CX-012253: Categorical Exclusion Determination Hydro Research Foundation University Research Awards - OSU CX(s) Applied: A9 Date: 05272014...

  9. CX-012252: Categorical Exclusion Determination | Department of...

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

    2: Categorical Exclusion Determination CX-012252: Categorical Exclusion Determination Hydro Research Foundation University Research Awards- Cornell CX(s) Applied: A9, B3.16 Date:...

  10. CX-012254: Categorical Exclusion Determination | Department of...

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

    4: Categorical Exclusion Determination CX-012254: Categorical Exclusion Determination Hydro Research Foundation University Research Awards - Vanderbilt CX(s) Applied: A9 Date: 05...

  11. CX-003904: Categorical Exclusion Determination | Department of...

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

    904: Categorical Exclusion Determination CX-003904: Categorical Exclusion Determination Hydro Electric Project - Snohomish Public Utility District CX(s) Applied: A9, A11, B5.1...

  12. CX-012246: Categorical Exclusion Determination | Department of...

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

    6: Categorical Exclusion Determination CX-012246: Categorical Exclusion Determination Hydro Research Foundation University Research Awards - University of Tennessee CX(s) Applied:...

  13. CX-012241: Categorical Exclusion Determination | Department of...

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

    1: Categorical Exclusion Determination CX-012241: Categorical Exclusion Determination Hydro Research Foundation University Research Awards - MIT CX(s) Applied: A9, B3.6 Date: 06...

  14. CX-011534: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Grays River Confluence Property Funding CX(s) Applied: B1.25 Date: 11/08/2013 Location(s): Washington Offices(s): Bonneville Power Administration

  15. CX-012434: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Low Cost Titanium Casting Technology CX(s) Applied: B3.6Date: 41878 Location(s): OhioOffices(s): National Energy Technology Laboratory

  16. CX-009542: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Solar Parks Project CX(s) Applied: B5.16 Date: 11/09/2012 Location(s): Florida Offices(s): Golden Field Office

  17. CX-003403: Categorical Exclusion Determination | Department of...

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

    CX-003403: Categorical Exclusion Determination The Snake River Geothermal Drilling Project - Innovative Approaches to Geothermal Exploration CX(s) Applied: A9, B3.7...

  18. CX-002745: Categorical Exclusion Determination | Department of...

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

    CX-002745: Categorical Exclusion Determination The Snake River Geothermal Drilling Project - Innovative Approaches to Geothermal Exploration CX(s) Applied: B3.1, A9...

  19. CX-006681: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-006681: Categorical Exclusion Determination New Drilling Location in Section 29 CX(s) Applied: B3.1 Date: 12232009 Location(s): Casper,...

  20. CX-006682: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-006682: Categorical Exclusion Determination New Drilling Location in Section 29 (Revision 1) CX(s) Applied: B3.7 Date: 06022010 Location(s):...

  1. CX-008486: Categorical Exclusion Determination | Department of...

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

    CX-008486: Categorical Exclusion Determination Demonstration of Gas Powered Drilling Operations for Economically-Challenged Wellhead Gas and Evaluation CX(s) Applied:...

  2. CX-007941: Categorical Exclusion Determination | Department of...

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

    Categorical Exclusion Determination Zonal Isolation Improvement for Horizontal Wells Drilling in the Marcellus Shale CX(s) Applied: A9 Date: 02152012 Location(s): Texas...

  3. CX-003888: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-003888: Categorical Exclusion Determination Improved Drilling and Fracturing Fluids for Shale Gas Reservoirs CX(s) Applied: B3.6 Date: 09102010...

  4. CX-007940: Categorical Exclusion Determination | Department of...

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

    Categorical Exclusion Determination Zonal Isolation Improvement for Horizontal Wells Drilling in the Marcellus Shale CX(s) Applied: B3.6 Date: 02152012 Location(s): Texas...

  5. CX-005582: Categorical Exclusion Determination | Department of...

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

    Categorical Exclusion Determination Foro Energy, Incorporated - Low-Contact Drilling Technology to Enable Economical Enhance Geothermal System Wells CX(s) Applied: B3.6,...

  6. CX-000855: Categorical Exclusion Determination | Department of...

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

    Determination CX-000855: Categorical Exclusion Determination 25A5208 - Low-contact Drilling Technology to Enable Economical Engineered Geothermal System Wells CX(s) Applied:...

  7. CX-008876: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Railroad Island Property Funding CX(s) Applied: B1.25 Date: 08/23/2012 Location(s): Oregon Offices(s): Bonneville Power Administration

  8. CX-011239: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Security Upgrades at Multiple Substations CX(s) Applied: ? Date: 10/02/2013 Location(s): Oregon, Washington Offices(s): Bonneville Power Administration

  9. CX-010739: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Golden State Solar Impact CX(s) Applied: A9, A11 Date: 08/15/2013 Location(s): California Offices(s): Golden Field Office

  10. CX-011044: Categorical Exclusion Determination | Department of...

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

    CX-011044: Categorical Exclusion Determination High Hydrogen, Low Methane Syngas from Low Ranked Coals for Coal-to-Liquids Production CX(s) Applied: A9 Date: 0910...

  11. CX-010751: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Solar Ready 2 CX(s) Applied: A9, A11 Date: 08/15/2013 Location(s): Missouri Offices(s): Golden Field Office

  12. CX-004015: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-004015: Categorical Exclusion Determination Arizona Balance of State- Energy Efficiency and Conservation Block Grant Wickenburg CX(s) Applied:...

  13. CX-009555: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-009555: Categorical Exclusion Determination Assisting the Tooling and Machining Industry to Become Energy Efficient CX(s) Applied: A9 Date: 12102012...

  14. CX-000835: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-000835: Categorical Exclusion Determination Wachs Cutter Tooling Station (4495) CX(s) Applied: B1.31 Date: 02112010 Location(s): Oak Ridge,...

  15. CX-012310: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Sawmill Creek Stream Bank Erosion CX(s) Applied: B1.3 Date: 06/06/2014 Location(s): Illinois Offices(s): Argonne Site Office

  16. CX-010338: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Eugene Substation Fiber Interconnection CX(s) Applied: B4.7 Date: 05/21/2013 Location(s): Oregon Offices(s): Bonneville Power Administration

  17. CX-011531: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Targhee Substation Land Acquisition CX(s) Applied: B1.24 Date: 11/05/2013 Location(s): Idaho Offices(s): Bonneville Power Administration

  18. CX-010435: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    De Moss Substation Expansion CX(s) Applied: B4.6 Date: 06/03/2013 Location(s): Oregon Offices(s): Bonneville Power Administration

  19. CX-011384: Categorical Exclusion Determination | Department of...

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

    Categorical Exclusion Determination Advanced Controls for the Multi-pod Centipod Wave Energy Converter Device CX(s) Applied: A9 Date: 12022013 Location(s): California...

  20. CX-011537: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Wanacut Creek Upper Property Funding CX(s) Applied: B1.25 Date: 11/26/2013 Location(s): Washington Offices(s): Bonneville Power Administration

  1. CX-011538: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Ninemile Creek Lower Property Funding CX(s) Applied: B1.25 Date: 11/26/2013 Location(s): Washington Offices(s): Bonneville Power Administration

  2. CX-011536: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Aeneans Creek Spring Property Funding CX(s) Applied: B1.25 Date: 11/25/2013 Location(s): Washington Offices(s): Bonneville Power Administration

  3. CX-011416: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Technology Integration Program CX(s) Applied: A9, A11 Date: 12/19/2013 Location(s): Ohio Offices(s): National Energy Technology Laboratory

  4. CX-010778: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Technology Integration Program CX(s) Applied: A9, A11 Date: 08/23/2013 Location(s): Oklahoma Offices(s): National Energy Technology Laboratory

  5. CX-012472: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Technology Integration Program CX(s) Applied: A9, A11, B3.11Date: 41873 Location(s): OhioOffices(s): National Energy Technology Laboratory

  6. CX-012038: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Deepwater Reverse-Circulation Primary Cementing CX(s) Applied: A9 Date: 04/17/2014 Location(s): Texas Offices(s): National Energy Technology Laboratory

  7. CX-010582: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Spring Creek Property Funding CX(s) Applied: B1.25 Date: 07/16/2013 Location(s): Montana Offices(s): Bonneville Power Administration

  8. CX-003706: Categorical Exclusion Determination | Department of...

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

    Categorical Exclusion Determination Development and Demonstration of an Innovative Thermal Energy Storage System for Baseload Solar Power Generation CX(s) Applied: A9, B3.6...

  9. CX-004217: Categorical Exclusion Determination | Department of...

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

    Replacement Facets for Central Receiver Test Facility Heliostats at the National Solar Thermal Test Facility (American Recovery and Reinvestment Act Funded) CX(s) Applied:...

  10. CX-003222: Categorical Exclusion Determination | Department of...

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

    and Reinvestment Act State Energy Program - Eastern Oregon Correctional Institution Solar Thermal CX(s) Applied: B5.1 Date: 08032010 Location(s): Pendleton, Oregon...

  11. CX-004251: Categorical Exclusion Determination | Department of...

    Energy Savers [EERE]

    CX-004251: Categorical Exclusion Determination High Yield Hybrid Cellulosic Ethanol Process Using High-Impact Feedstock for Commercialization by 2013 CX(s) Applied: A9,...

  12. CX-003208: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-003208: Categorical Exclusion Determination Michigan 85% Ethanol Fuel (E85) Infrastructure Project CX(s) Applied: B5.1 Date: 08032010 Location(s):...

  13. CX-003471: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-003471: Categorical Exclusion Determination Pennsylvania Ethanol Fuel (E85) Corridor Project - Lew's Service Center CX(s) Applied: B5.1 Date: 0823...

  14. CX-011215: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Nepese Marsh Upgrades CX(s) Applied: B2.5 Date: 10/17/2013 Location(s): Illinois Offices(s): Fermi Site Office

  15. CX-008534: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Peter Wentz Geothermal CX(s) Applied: B5.19 Date: 05/23/2012 Location(s): Pennsylvania Offices(s): Golden Field Office

  16. CX-008204: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Energize Missouri HUG Finch CX(s) Applied: B5.19 Date: 03/23/2012 Location(s): Missouri Offices(s): Golden Field Office

  17. CX-008203: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Energize Missouri HUG Demoret CX(s) Applied: B5.19 Date: 03/23/2012 Location(s): Missouri Offices(s): Golden Field Office

  18. CX-009442: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Cutters Grove, Anoka CX(s) Applied: A9, B5.19 Date: 07/31/2012 Location(s): Minnesota Offices(s): Golden Field Office

  19. CX-007836: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Building Retrofits CX(s) Applied: B5.19 Date: 01/30/2012 Location(s): Illinois Offices(s): Energy Efficiency and Renewable Energy

  20. CX-008241: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Energize Missouri HUG Teter CX(s) Applied: B5.19 Date: 05/15/2012 Location(s): Missouri Offices(s): Golden Field Office

  1. CX-008205: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Energize Missouri HUG Weaver CX(s) Applied: B5.19 Date: 03/23/2012 Location(s): Missouri Offices(s): Golden Field Office

  2. CX-010583: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Upper Jocko River Property Funding CX(s) Applied: B1.25 Date: 07/16/2013 Location(s): Montana Offices(s): Bonneville Power Administration

  3. CX-007925: Categorical Exclusion Determination | Department of...

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

    Determination CX-007925: Categorical Exclusion Determination Severe Environment Corrosion and Erosion Research Facility CX(s) Applied: B3.6 Date: 02222012 Location(s):...

  4. CX-006048: Categorical Exclusion Determination | Department of...

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

    Determination CX-006048: Categorical Exclusion Determination Severe Environmental Corrosion & Erosion Research Facility (SECERF) CX(s) Applied: B3.6 Date: 06082011...

  5. CX-006395: Categorical Exclusion Determination | Department of...

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

    Categorical Exclusion Determination CX-006395: Categorical Exclusion Determination Corrosion Tests on Carbon Steel Exposed to Oxalic Acid and a Sludge Simulant CX(s) Applied:...

  6. CX-005801: Categorical Exclusion Determination | Department of...

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

    Determination CX-005801: Categorical Exclusion Determination Polymer Synthesis, Corrosion, and Electrochemical Tests in Lab D-0115 CX(s) Applied: B3.6 Date: 03312011...

  7. CX-006043: Categorical Exclusion Determination | Department of...

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

    Categorical Exclusion Determination CX-006043: Categorical Exclusion Determination CorrosionElectrochemistry Laboratory CX(s) Applied: B3.6 Date: 06082011 Location(s):...

  8. CX-005861: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-005861: Categorical Exclusion Determination Pretreatment Engineering Platform (PEP) Sludge Simulant Preparation CX(s) Applied: B3.6 Date: 03172011...

  9. CX-011131: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Puget Sound Pilot Tidal Energy Project CX(s) Applied: A9 Date: 08/13/2013 Location(s): Washington Offices(s): Golden Field Office

  10. CX-012195: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Alfalfa Substation Control House Replacement CX(s) Applied: B4.11 Date: 05/02/2014 Location(s): Washington Offices(s): Bonneville Power Administration

  11. CX-008683: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Shaniko Radio Station Replacement Project CX(s) Applied: B1.19 Date: 07/11/2012 Location(s): Oregon Offices(s): Bonneville Power Administration

  12. CX-012790: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Haystack Butte Radio Site Land Acquisition CX(s) Applied: B1.24Date: 41939 Location(s): WashingtonOffices(s): Bonneville Power Administration

  13. CX-009698: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Sale of Lakeside Radio Station CX(s) Applied: B1.24 Date: 12/27/2012 Location(s): Oregon Offices(s): Bonneville Power Administration

  14. CX-012231: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Mica Peak Radio Station upgrade CX(s) Applied: B1.19 Date: 06/09/2014 Location(s): Washington Offices(s): Bonneville Power Administration

  15. CX-011190: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Alberton Communication Site Construction CX(s) Applied: B1.19 Date: 08/26/2013 Location(s): Montana Offices(s): Bonneville Power Administration

  16. CX-002138: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination CX-002138: Categorical Exclusion Determination Waste Digester Biogas Recovery System CX(s) Applied: B5.1 Date: 04292010 Location(s): Plover, Wisconsin...

  17. CX-005444: Categorical Exclusion Determination | Department of...

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

    Exclusion Determination Energy Efficiency and Conservation Block Grant: Electric and Hybrid Vehicle Incremental Cost Recovery CX(s) Applied: B5.1 Date: 03222011 Location(s):...

  18. CX-012189: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Microbial Laboratory Analysis CX(s) Applied: B3.12 Date: 05/06/2014 Location(s): Illinois Offices(s): Argonne Site Office

  19. CX-009423: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Relay and Switchboard Panel Replacements CX(s) Applied: B4.6 Date: 10/29/2012 Location(s): Arkansas Offices(s): Southwestern Power Administration

  20. CX-010057: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Eugene Substation Protective Relay Installation CX(s) Applied: B1.7 Date: 01/29/2013 Location(s): Oregon Offices(s): Bonneville Power Administration