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Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Slope preserving lossy terrain compression  

Science Conference Proceedings (OSTI)

Accurate terrain representation with appropriate preservation of important terrain characteristics, especially slope steepness, is becoming more crucial and fundamental as the geographical models are becoming more complex. Based on our earlier success ... Keywords: GIS, PDE solver, terrain elevation data set compression, terrain modeling

Zhongyi Xie; W. Randolph Franklin; Daniel M. Tracy

2010-11-01T23:59:59.000Z

2

Variability of Surface Air Temperature over Gently Sloped Terrain  

Science Conference Proceedings (OSTI)

Temperature and wind data from a rural micronet and nearby site of the Oklahoma Mesonet are analyzed to study the frequency, strength, and formation processes of cold-pool events in a region with gentle terrain. Spatial analyses were performed ...

David Bodine; Petra M. Klein; Sean C. Arms; Alan Shapiro

2009-06-01T23:59:59.000Z

3

Urbanizing terrains  

E-Print Network (OSTI)

Urban "sprawl"in the East Attica area of Athens has dramatically changed the former rural economy in a manner consistent with the urbanizing terrain's underlying properties: agricultural subdivisions, existing centres, ...

Romanos, Christoforos

2008-01-01T23:59:59.000Z

4

A Comparison of Methods for Computing the Sigma-Coordinate Pressure Gradient Force for Flow over Sloped Terrain in a Hybrid Theta-Sigma Model  

Science Conference Proceedings (OSTI)

Five methods for computing the pressure gradient force within a sigma domain of a hybrid model are compared for flow over a steeply sloped terrain. The comparison includes pressure gradient calculations determined from a direct transformation to ...

Donald R. Johnson; Louis W. Uccellini

1983-04-01T23:59:59.000Z

5

The Initiation and Horizontal Scale Selection of Convection over Gently Sloping Terrain  

Science Conference Proceedings (OSTI)

Two- and three-dimensional numerical simulations were performed to investigate the scale selection and initiation of both moist and dry convection over gentle western and gentle eastern slopes where the latter represents an idealization of the ...

Jean-Luc Redelsperger; Terry L. Clark

1990-02-01T23:59:59.000Z

6

Extending the Numerical Stability Limit of Terrain-Following Coordinate Models over Steep Slopes  

Science Conference Proceedings (OSTI)

To extend the numerical stability limit over steep slopes, a truly horizontal pressure-gradient discretization based on the ideas formulated by Mahrer in the 1980s has been developed. Conventionally, the pressure gradient is evaluated in the ...

Günther Zängl

2012-11-01T23:59:59.000Z

7

Numerical Consistency of Metric Terms in Terrain-Following Coordinates  

Science Conference Proceedings (OSTI)

In numerically integrating the equations of motion in terrain-following coordinates, care must be taken in treating the metric terms that arise due to the sloping coordinate surfaces. In particular, metric terms that appear in the advection and ...

Joseph B. Klemp; William C. Skamarock; Oliver Fuhrer

2003-07-01T23:59:59.000Z

8

Improved visibility computation on massive grid terrains  

Science Conference Proceedings (OSTI)

This paper describes the design and engineering of algorithms for computing visibility maps on massive grid terrains. Given a terrain T, specified by the elevations of points in a regular grid, and given a viewpoint v, the visibility ...

Jeremy Fishman; Herman Haverkort; Laura Toma

2009-11-01T23:59:59.000Z

9

Multiscale Evaluation of the Improvements in Surface Snow Simulation through Terrain Adjustments to Radiation  

Science Conference Proceedings (OSTI)

The downwelling shortwave radiation on the earth’s land surface is affected by the terrain characteristics of slope and aspect. These adjustments, in turn, impact the evolution of snow over such terrain. This article presents a multiscale ...

Sujay V. Kumar; Christa D. Peters-Lidard; David Mocko; Yudong Tian

2013-02-01T23:59:59.000Z

10

Turbulent Kinetic Energy Budgets over Mountainous Terrain  

Science Conference Proceedings (OSTI)

The objective of this study is to describe the characteristics of the airflow and turbulence structure over mountainous terrain. Turbulent characteristics of the airflow were measured using well-instrumented aircraft. The shear, buoyancy, ...

Theodore S. Karacostas; John D. Marwitz

1980-02-01T23:59:59.000Z

11

On Thermally Forced Circulations over Heated Terrain  

Science Conference Proceedings (OSTI)

A combination of analytical and numerical models is used to gain insight into the dynamics of thermally forced circulations over diurnally heated terrain. Solutions are obtained for two-layer flows (representing the boundary layer and the ...

Daniel J. Kirshbaum

2013-06-01T23:59:59.000Z

12

The Terrain-Induced Rotor Experiment  

Science Conference Proceedings (OSTI)

The Terrain-Induced Rotor Experiment (T-REX) is a coordinated international project, composed of an observational field campaign and a research program, focused on the investigation of atmospheric rotors and closely related phenomena in complex ...

Vanda Grubiši?; James D. Doyle; Joachim Kuettner; Richard Dirks; Stephen A. Cohn; Laura L. Pan; Stephen Mobbs; Ronald B. Smith; C. David Whiteman; Stanley Czyzyk; Simon Vosper; Martin Weissmann; Samuel Haimov; Stephan F. J. De Wekker; Fotini Katopodes Chow

2008-10-01T23:59:59.000Z

13

Wind and Diffusion Modeling for Complex Terrain  

Science Conference Proceedings (OSTI)

Atmospheric transport and dispersion over complex terrain were investigated. Meteorological and sulfur hexafluoride (SF6) concentration data were collected and used to evaluate the performance of a transport and diffusion model coupled with a ...

Robert M. Cox; John Sontowski; Richard N. Fry Jr.; Catherine M. Dougherty; Thomas J. Smith

1998-10-01T23:59:59.000Z

14

Daytime heat transfer processes over mountainous terrain  

Science Conference Proceedings (OSTI)

The daytime heat transfer mechanisms over mountainous terrain are investigated by means of large-eddy simulations over idealized valleys. Two- and three-dimensional topographies, corresponding to infinite and finite valleys, are used in order to ...

Juerg Schmidli

15

Dispersion into Severe Coastal Complex Terrain  

Science Conference Proceedings (OSTI)

A field study of dispersion using tracer gases from offshore sources into severe coastal complex terrain was conducted in central California. Data were collected on dispersion, surface concentrations trajectories, and stability. An examination of ...

Timothy C. Spangler; James W. Keating

1990-01-01T23:59:59.000Z

16

The Lidars in Flat Terrain (LIFT) Experiment  

Science Conference Proceedings (OSTI)

The authors describe and present early results from the July_August 1996 Lidars in Flat Terrain (LIFT) experiment. LIFT was a boundary layer experiment that made use of recently developed Doppler, aerosol backscatter, and ozone lidars, along with ...

Stephen A. Cohn; Shane D. Mayor; Christian J. Grund; Tammy M. Weckwerth; Christoph Senff

1998-07-01T23:59:59.000Z

17

Average Diurnal Behavior of Surface Winds during Summer at Sites in Complex Terrain  

Science Conference Proceedings (OSTI)

Mean diurnal wind distributions from five surface stations in the rugged Geysers area of northern California were examined to determine how they were affected by the terrain. The one dimensional slope-flow model of Garrett was able to simulate ...

Alfred J. Garrett; Frank G. Smith III

1985-02-01T23:59:59.000Z

18

Mesoscale Boundary Layer Evolution over Complex Terrain. Part I. Numerical Simulation of the Diurnal Cycle  

Science Conference Proceedings (OSTI)

The continuous development of a meso-?-scale boundary layer over sloping terrain upwind of a high mountain barrier was simulated through a complete diurnal cycle using a nonhydrostatic boundary-layer model. The simulation detailed the evolution ...

David C. Bader; Thomas B. McKee; Gregory J. Tripoli

1987-10-01T23:59:59.000Z

19

Real-Time streaming and rendering of terrains  

Science Conference Proceedings (OSTI)

Terrains and other geometric models have been traditionally stored locally. Their remote access presents the characteristics that are a combination of file serving and realtime streaming like audio-visual media. This paper presents a terrain streaming ...

Soumyajit Deb; Shiben Bhattacharjee; Suryakant Patidar; P. J. Narayanan

2006-12-01T23:59:59.000Z

20

Representing Drag on Unresolved Terrain as a Distributed Momentum Sink  

Science Conference Proceedings (OSTI)

In numerical weather prediction models, drag on unresolved terrain is usually represented by augmenting the boundary drag on the model atmosphere, in terms of an effective surface roughness length. But as is shown here, if a terrain-following ...

John D. Wilson

2002-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Instability Analysis of Terrain-Induced Canopy Flows  

Science Conference Proceedings (OSTI)

Tall vegetation and complex terrain create difficult conditions for measuring and modeling net ecosystem–atmosphere exchanges of carbon, water vapor, and pollutants. The instability of canopy flow regimes over complex terrain is critical for ...

Chuixiang Yi

2009-07-01T23:59:59.000Z

22

Vibration-based terrain classification for electric powered wheelchairs  

Science Conference Proceedings (OSTI)

Automated terrain classification for electric powered wheelchairs (EPWs) has two primary motivations. First, certain terrains (e.g., sand and gravel) make wheelchair mobility more difficult. To alleviate this problem the wheelchair control system can ... Keywords: advanced wheelchair systems, electric powered wheelchairs, terrain classification, vibrations

Eric Coyle; Emmanuel G. Collins, Jr.; Edmond DuPont; Dan Ding; Hongwu Wang; Rory A. Cooper; Garrett Grindle

2008-04-01T23:59:59.000Z

23

Real-time tessellation of terrain on graphics hardware  

Science Conference Proceedings (OSTI)

Synthetic terrain is a key element in many applications, which can lessen the sense of realism if it is not handled correctly. We propose a new technique for visualizing terrain surfaces by tessellating them on the GPU. The presented algorithm introduces ... Keywords: GPU, Level of detail, Real-time rendering, Terrain simulation, Tessellation

Oscar Ripolles; Francisco Ramos; Anna Puig-Centelles; Miguel Chover

2012-04-01T23:59:59.000Z

24

Electric Utility Terrain Vehicle Demonstration in a Military Base Application  

Science Conference Proceedings (OSTI)

Utility terrain vehicles (UTVs), also called all terrain vehicles (ATVs), are used for a variety of purposes ranging from transporting people and materials to recreation. Examples of uses include transportation at military bases, for beach patrols, at ports, agricultural locations, industrial sites, and local/municipal applications such as at parks and schools. As of August 30, 2012 the Federal Highway Administration estimated that annual fuel usage of All-terrain vehicles to be approximately 173 ...

2013-07-24T23:59:59.000Z

25

Alteration of Terrain Permits (New Hampshire) | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Alteration of Terrain Permits (New Hampshire) Alteration of Terrain Permits (New Hampshire) Alteration of Terrain Permits (New Hampshire) < Back Eligibility Agricultural Commercial Construction Fed. Government Fuel Distributor General Public/Consumer Industrial Installer/Contractor Institutional Investor-Owned Utility Local Government Low-Income Residential Multi-Family Residential Municipal/Public Utility Nonprofit Residential Retail Supplier Rural Electric Cooperative Schools State/Provincial Govt Systems Integrator Transportation Tribal Government Utility Savings Category Alternative Fuel Vehicles Hydrogen & Fuel Cells Buying & Making Electricity Water Home Weatherization Solar Wind Program Info State New Hampshire Program Type Siting and Permitting Provider NH Department of Environmental Services Alteration of Terrain Bureau

26

Zigbee-based Internet of Things in 3D Terrains  

Science Conference Proceedings (OSTI)

This paper focuses on the Zigbee-based Internet of Things (IoTs) in 3D terrains. A novel simulation model for IoT is proposed. The effects of various terrains, node's mobility and traffic loads are investigated in this study. Many comprehensive studies ...

Mu-Sheng Lin, Jenq-Shiou Leu, Kuen-Han Li, Jean-Lien C. Wu

2013-08-01T23:59:59.000Z

27

Accurate Wind Characterization in Complex Terrain Using the Immersed Boundary Method  

DOE Green Energy (OSTI)

This paper describes an immersed boundary method (IBM) that facilitates the explicit resolution of complex terrain within the Weather Research and Forecasting (WRF) model. Two different interpolation methods, trilinear and inverse distance weighting, are used at the core of the IBM algorithm. Functional aspects of the algorithm's implementation and the accuracy of results are considered. Simulations of flow over a three-dimensional hill with shallow terrain slopes are preformed with both WRF's native terrain-following coordinate and with both IB methods. Comparisons of flow fields from the three simulations show excellent agreement, indicating that both IB methods produce accurate results. However, when ease of implementation is considered, inverse distance weighting is superior. Furthermore, inverse distance weighting is shown to be more adept at handling highly complex urban terrain, where the trilinear interpolation algorithm breaks down. This capability is demonstrated by using the inverse distance weighting core of the IBM to model atmospheric flow in downtown Oklahoma City.

Lundquist, K A; Chow, F K; Lundquist, J K; Kosovic, B

2009-09-30T23:59:59.000Z

28

A Model Study of the Stably Stratified Steady-State Atmospheric Boundary Layer over a Slightly Inclined Terrain  

Science Conference Proceedings (OSTI)

A simple, steady-state, numerical model is used to examine the Rossby-number similarity theory of the atmospheric boundary layer over a slightly inclined terrain. The model confirms the similarity predictions. The slope-influenced universal ...

Zbigniew Sorbjan

1984-06-01T23:59:59.000Z

29

A Method for Imposing Surface Stress and Heat Flux Conditions in Finite-Difference Models with Steep Terrain  

Science Conference Proceedings (OSTI)

A numerical implementation of the surface stress boundary condition is presented for finite-difference models in which the terrain slope and curvature cannot necessarily be considered small. The method involves reducing the discretized stress ...

C. C. Epifanio

2007-03-01T23:59:59.000Z

30

Multiple-Scale Terrain Forcing of Local Wind Fields  

Science Conference Proceedings (OSTI)

Observations and numerical simulations with a hydrostatic model are used to examine effects of regional and local terrain, synoptic forcing, and stability on the wind fields of an intermountain basin. The study area is centered on the Hanford ...

J. C. Doran; E. D. Skyllingstad

1992-05-01T23:59:59.000Z

31

An Observational and Prognostic Numerical Investigation of Complex Terrain Dispersion  

Science Conference Proceedings (OSTI)

The Atmospheric Studies in Complex Terrain Program conducted a field experiment at the interface of the Rocky Mountains and the Great Plains in the winter of 1991. Extensive meteorological observations were taken in northeastern Colorado near ...

Gregory S. Poulos; James E. Bossert

1995-03-01T23:59:59.000Z

32

Boundary-layer updrafts driven by airflow over heated terrain  

Science Conference Proceedings (OSTI)

This study presents linear and nonlinear scalings for boundary-layer ascent forced by airflow over heated terrain and compares them to results from corresponding high-resolution numerical simulations. Close agreement between theory and simulation ...

Daniel J. Kirshbaum; Chun-Chih Wang

33

On the Computation of Gradients from Observations over Complex Terrain  

Science Conference Proceedings (OSTI)

A mathematical scheme is developed to compute the gradients of observations taken over complex terrain. The method is applied to an artificial example to demonstrate the scheme. An application is made to surface pressure observations between ...

Fred J. Kopp; Paul L. Smith; Harold D. Orville

2001-10-01T23:59:59.000Z

34

Flow over Heated Terrain. Part II: Generation of Convective Precipitation  

Science Conference Proceedings (OSTI)

Previous studies have shown that thunderstorms in the Rocky Mountain region have preferred areas in which to form. There has been some indication that these areas depend on the midtropospheric wind direction. A nonhydrostatic model with a terrain-...

Donna F. Tucker; N. Andrew Crook

2005-09-01T23:59:59.000Z

35

Evaluation of an Air Pollution Analysis System for Complex Terrain  

Science Conference Proceedings (OSTI)

This paper describes results from a study to evaluate components of an operational air quality modeling system for complex terrain. In particular, the Cinder Cone Butte (CCB) “modeler's dataset” is used to evaluate the current technique for ...

D. G. Ross; D. G. Fox

1991-07-01T23:59:59.000Z

36

Implication of Spatial Averaging in Complex-Terrain Wind Studies  

Science Conference Proceedings (OSTI)

Studies of wind over complex terrain have been conducted at three times and two locations in Northern California. Instrumentation included conventional cup-vane anemometers and optical anemometers with spatial averaging over path lengths of 0.6-1 ...

W. M. Porch

1982-09-01T23:59:59.000Z

37

Terrain database interoperability issues in training with distributed interactive simulation  

Science Conference Proceedings (OSTI)

In Distributed Interactive Simulation (DIS), each participating node is responsible for maintaining its own model of the synthetic environment. Problems may arise if significant inconsistencies are allowed to exist between these separate world views, ... Keywords: distributed interactive simulation, terrain databases

Guy A. Schiavone; S. Sureshchandran; Kenneth C. Hardis

1997-07-01T23:59:59.000Z

38

On Computing the Surface Horizontal Pressure Gradient over Elevated Terrain  

Science Conference Proceedings (OSTI)

Methods are proposed for calculating the surface horizontal pressure gradient or geostrophic wind in a local area over elevated terrain from randomly spaced surface observations. These procedures avoid many of the problems associated with sea-...

Maurice Danard

1989-06-01T23:59:59.000Z

39

Computing Hydrostatic Potential Vorticity in Terrain-Following Coordinates  

Science Conference Proceedings (OSTI)

The hydrostatic potential vorticity (HPV) formulated in terrain-following coordinates is reviewed and shown to be equivalent to the widely used HPV formulations in the height, pressure, and isentropic coordinates in the sense that they all ...

Jie Cao; Qin Xu

2011-09-01T23:59:59.000Z

40

On Estimating Dry Deposition Rates in Complex Terrain  

Science Conference Proceedings (OSTI)

In complex terrain, horizontal advection and filtration through a canopy can add substantially to the vertical diffusion component assumed to be the dominant transfer mechanism in conventional deposition velocity formulations. To illustrate this, ...

Bruce B. Hicks

2008-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Classification and modeling of forested terrain using LIDAR sensing  

E-Print Network (OSTI)

To operate autonomously, unmanned ground vehicles (UGVs) must be able to identify the load-bearing surface of the terrain (i.e. the ground) and obstacles. Current sensing techniques work well for structured environments ...

McDaniel, Matthew W

2010-01-01T23:59:59.000Z

42

Modeling of Summertime Flow and Dispersion in the Coastal Terrain of Southeastern Australia  

Science Conference Proceedings (OSTI)

The Latrobe Valley is situated in a coastal region of complex terrain in southeastern Australia. During typical summertime conditions of light synoptic winds and clear skies, the low-level regional wind field is dominated by sea-breeze and slope-...

William L. Physick; Deborah J. Abbs

1991-04-01T23:59:59.000Z

43

On the Laws of Geostrophic Drag and Heat Transfer over a Slightly Inclined Terrain  

Science Conference Proceedings (OSTI)

Analytical solutions of a set of equations that couples the Ekman boundary layer and the Prandtl slope wind equations are presented for terrain inclinations with an upper limit of 0.2. With the aid of the logarithmic asymptotes for wind and ...

Lev N. Gutman; JoséW. Melgarejo

1981-08-01T23:59:59.000Z

44

Improving visual quality of synthetic terrains using weathering simulation on graphics processing unit.  

E-Print Network (OSTI)

??Visual simulation of natural eroded terrains using computer graphics has always been a fascinating research field. While many algorithms have been developed to improve terrain… (more)

Nguyen, Hoang Anh.

2008-01-01T23:59:59.000Z

45

Generating color terrain images in an emergency response system  

Science Conference Proceedings (OSTI)

The Atmospheric Release Advisory Capability (ARAC) provides real-time assessments of the consequences resulting from an atmospheric release of radioactive material. In support of this operation, a system has been created which integrates numerical models, data acquisition systems, data analysis techniques, and professional staff. Of particular importance is the rapid generation of graphical images of the terrain surface in the vicinity of the accident site. A terrain data base and an associated acquisition system have been developed that provide the required terrain data. This data is then used as input to a collection of graphics programs which create and display realistic color images of the terrain. The graphics system currently has the capability of generating color shaded relief images from both overhead and perspective viewpoints within minutes. These images serve to quickly familiarize ARAC assessors with the terrain near the release location, and thus permit them to make better informed decisions in modeling the behavior of the released material. 7 refs., 8 figs.

Belles, R.D.

1985-08-01T23:59:59.000Z

46

High-Resolution Aeromagnetic Mapping Of Volcanic Terrain, Yellowstone  

Open Energy Info (EERE)

High-Resolution Aeromagnetic Mapping Of Volcanic Terrain, Yellowstone High-Resolution Aeromagnetic Mapping Of Volcanic Terrain, Yellowstone National Park Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: High-Resolution Aeromagnetic Mapping Of Volcanic Terrain, Yellowstone National Park Details Activities (1) Areas (1) Regions (0) Abstract: High-resolution aeromagnetic data acquired over Yellowstone National Park (YNP) show contrasting patterns reflecting differences in rock composition, types and degree of alteration, and crustal structures that mirror the variable geology of the Yellowstone Plateau. The older, Eocene, Absaroka Volcanic Supergroup, a series of mostly altered, andesitic volcanic and volcaniclastic rocks partially exposed in mountains on the eastern margin of YNP, produces high-amplitude, positive magnetic

47

Real Time Physically-Based Modeling and Simulation of Cratering and Fragmentation of Terrain  

Science Conference Proceedings (OSTI)

Cratering and fragmentation of terrain due to eXplosions are the behaviors of interest in this effort. We propose a physically-based approach to model the eXplosion event and the process of terrain fragmentation resulting in the formation of craters. ... Keywords: dynamic terrain, eXplosion simulation, physics-based modeling, real time system, simulation, terrain database

Nabil Rami; Michael D. Proctor

2007-12-01T23:59:59.000Z

48

All-Terrain Vehicle: Non-Road Electric Vehicle Demonstration  

Science Conference Proceedings (OSTI)

An all-terrain vehicle (ATV) is defined by the American National Standards Institute (ANSI) as one that travels on low-pressure tires, with a seat that is straddled by the operator or the operator and one passenger, along with handlebars for steering control. As the name implies, it is designed to handle a wider variety of terrain than most other vehicles. The gasoline-fueled four-wheel drive option is now the most popular type of ATV, with expanding uses in industries such as farming, ranching, and cons...

2009-12-21T23:59:59.000Z

49

A Novel Five Wheeled Rover for All Terrain Navigation  

Science Conference Proceedings (OSTI)

This paper presents a new concept for rough terrain navigation of rovers. The proposed design has reduced number of joints and links from existing suspension concepts. The suspension mechanism is derived from planar four bar mechanism and hence we present ... Keywords: Four bar mechanism, linear programming and dynamics, singularity

Arun Kumar Singh; Arun H. Patil; Anup Kumar Saha

2009-12-01T23:59:59.000Z

50

Optimization and learning for rough terrain legged locomotion  

Science Conference Proceedings (OSTI)

We present a novel approach to legged locomotion over rough terrain that is thoroughly rooted in optimization. This approach relies on a hierarchy of fast, anytime algorithms to plan a set of footholds, along with the dynamic body motions required ... Keywords: Legged robots, adaptive control, mobile robotics, motion control, nonholonomic motion planning

Matt Zucker; Nathan Ratliff; Martin Stolle; Joel Chestnutt; J Andrew Bagnell; Christopher G Atkeson; James Kuffner

2011-02-01T23:59:59.000Z

51

Geolocation of Multiple Targets from Airborne Video Without Terrain Data  

Science Conference Proceedings (OSTI)

The task of geolocating targets from airborne video is required for many applications in surveillance, law enforcement, reconnaissance, etc. The usual approaches to target geolocation involve terrain data, single target tracking, gimbal control of camera ... Keywords: Geolocation, IMU-Camera calibration, Tracking, Unmanned aerial vehicle

Kyung Min Han; Guilherme N. Desouza

2011-04-01T23:59:59.000Z

52

PRODUCING SATELLITE-DERIVED IRRADIANCES IN COMPLEX ARID TERRAIN  

Open Energy Info (EERE)

ASES 2003, Austin TX and submitted for publication in Solar Energy ASES 2003, Austin TX and submitted for publication in Solar Energy PRODUCING SATELLITE-DERIVED IRRADIANCES IN COMPLEX ARID TERRAIN Richard Perez & Marek Kmiecik ASRC, the University at Albany 251 Fuller Rd. Albany, NY 12203 perez@asrc.cestm.albany.edu Pierre Ineichen, CUEPE, University of Geneva 7 Route de Drize 1227 Carouge, Switzerland Pierre.Ineichen@cuepe.unige.ch Marek Kmiecik, ASRC Kathleen Moore, IED 251 Fuller Rd. Albany, NY 12203 moore@iedat.com David Renne & Ray George NREL 1617 Cole Blvd. Golden, CO 80401 drenne / ray_george@nrel.nrel.gov ABSTRACT This paper describes a methodology to correct satellite- derived irradiances over complex terrain. The correction applies to satellite models using visible images from geostationary satellites. 1. DESCRIPTION OF CURRENT MODEL

53

All-Terrain Vehicle: Non-Road Electric Vehicle Demonstration  

Science Conference Proceedings (OSTI)

An all-terrain vehicle (ATV) is defined by the American National Standards Institute (ANSI) as one that travels on low-pressure tires, with a seat that is straddled by the operator or the operator and one passenger, along with handlebars for steering control. Most ATVs are gas powered, but replacement of gas-powered ATVs with an electric equivalent could reduce emissions output, fuel consumption, and other petrochemical byproducts resulting from operation of these vehicles. An electric ATV offers all of ...

2010-12-31T23:59:59.000Z

54

Atmospheric transport in complex terrain at Los Alamos, Area G  

Science Conference Proceedings (OSTI)

This report documents the atmospheric dispersion used in the Area G Performance Assessment for off-site airborne dose calculations. Potential airborne contaminants from the mesa top disposal facility disperse in the complex terrain dominated by narrow mesas in parallel to narrow canyons. The dispersion is characterized by site-specific values of X/Q [(Ci/m{sup 3})/(Ci/s)] at each of two designated receptor locations, a {open_quote}maximum off-site dose{close_quote} location and a nearby population center (White Rock, NM). The values of X/Q in each of the sixteen wind sectors are first estimated with the CAP-88 computer code using 1992 annual meteorologic data from Area G and assuming an area source for release. This data captures the dominant wind direction on the mesa tops from the SSW. These dispersion parameters are assumed to apply to open, flat terrain and must be corrected for the complex mesa and canyon terrain terrain surrounding the Area G site. Additional meteorologic data has been collected over two years from six remote temporary meteorological stations operated on the mesas and in the canyons immediately around Area G. These data indicate that the wind flow in the canyons is exclusively bimodel, flowing up canyon during the day and down canyon at night. It is conservatively assumed that all ground level releases from Area G which blow out across an adjacent canyon become entrained in the canyon flow. This effectively combines the contaminant release for several sectors into a single canyon flow which is upstream during the day or downstream at night. This canyon channeling mechanism is implemented in the model by summing the wind sector dispersion factors over those sectors appropriate to the geometry for a release from Area G toward either adjacent canyon.

Vold, E.L.

1997-03-01T23:59:59.000Z

55

Exploring the Possible Role of Small-Scale Terrain Drag on Stable Boundary Layers over Land  

Science Conference Proceedings (OSTI)

This paper addresses the possible role of unresolved terrain drag, relative to the turbulent drag on the development of the stable atmospheric boundary layer over land. Adding a first-order estimate for terrain drag to the turbulent drag appears ...

G. J. Steeneveld; A. A. M. Holtslag; C. J. Nappo; B. J. H. van de Wiel; L. Mahrt

2008-10-01T23:59:59.000Z

56

Plume Dispersion Anomalies in a Nocturnal Urban Boundary Layer in Complex Terrain  

Science Conference Proceedings (OSTI)

The URBAN 2000 experiments were conducted in the complex urban and topographical terrain in Salt Lake City, Utah, in stable nighttime conditions. Unexpected plume dispersion often arose because of the interaction of complex terrain and mountain–...

Dennis Finn; Kirk L. Clawson; Roger G. Carter; Jason D. Rich; K. Jerry Allwine

2008-11-01T23:59:59.000Z

57

On-the-Fly Decompression and Rendering of Multiresolution Terrain  

SciTech Connect

We present a streaming geometry compression codec for multiresolution, uniformly-gridded, triangular terrain patches that supports very fast decompression. Our method is based on linear prediction and residual coding for lossless compression of the full-resolution data. As simplified patches on coarser levels in the hierarchy already incur some data loss, we optionally allow further quantization for more lossy compression. The quantization levels are adaptive on a per-patch basis, while still permitting seamless, adaptive tessellations of the terrain. Our geometry compression on such a hierarchy achieves compression ratios of 3:1 to 12:1. Our scheme is not only suitable for fast decompression on the CPU, but also for parallel decoding on the GPU with peak throughput over 2 billion triangles per second. Each terrain patch is independently decompressed on the fly from a variable-rate bitstream by a GPU geometry program with no branches or conditionals. Thus we can store the geometry compressed on the GPU, reducing storage and bandwidth requirements throughout the system. In our rendering approach, only compressed bitstreams and the decoded height values in the view-dependent 'cut' are explicitly stored on the GPU. Normal vectors are computed in a streaming fashion, and remaining geometry and texture coordinates, as well as mesh connectivity, are shared and re-used for all patches. We demonstrate and evaluate our algorithms on a small prototype system in which all compressed geometry fits in the GPU memory and decompression occurs on the fly every rendering frame without any cache maintenance.

Lindstrom, P; Cohen, J D

2009-04-02T23:59:59.000Z

58

Atmospheric studies in complex terrain: a planning guide for future studies  

Science Conference Proceedings (OSTI)

The objective of this study is to assist the US Department of Energy in Conducting its atmospheric studies in complex terrain (ASCOT0 by defining various complex terrain research systems and relating these options to specific landforms sites. This includes: (1) reviewing past meteorological and diffusion research on complex terrain; (2) relating specific terrain-induced airflow phenomena to specific landforms and time and space scales; (3) evaluating the technical difficulty of modeling and measuring terrain-induced airflow phenomena; and (4) avolving severdal research options and proposing candidate sites for continuing and expanding field and modeling work. To evolve research options using variable candidate sites, four areas were considered: site selection, terrain uniqueness and quantification, definition of research problems and research plans. 36 references, 111 figures, 20 tables.

Orgill, M.M.

1981-02-01T23:59:59.000Z

59

Multilinguisme, variation, contact. Des pratiques langagières sur le terrain à l'analyse de corpus hétérogènes.  

E-Print Network (OSTI)

??Ce mémoire de synthèse présente un premier chapitre de positionnements épistémologiques (pratiques langagières, construction des objets, des données et des corpus, linguistique de terrain impliquée,… (more)

Léglise, Isabelle

2013-01-01T23:59:59.000Z

60

Ultrawideband radar clutter measurements of forested terrain, 1991--1992  

Science Conference Proceedings (OSTI)

The ultrawideband (UWB) radar clutter measurements project was conducted to provide radar clutter data for new ultrawideband radar systems which are currently under development. A particular goal of this project is to determine if conventional narrow band clutter data may be extrapolated to the UWB case. This report documents measurements conducted in 1991 and additional measurements conducted in 1992. The original project consisted of clutter measurements of forested terrain in the Olympic National Forest near Sequim, WA. The impulse radar system used a 30 kW peak impulse source with a 2 Gigasample/second digitizer to form a UHF (300--1000 MHz) ultrawideband impulse radar system. Additional measurements were conducted in parallel using a Systems Planning Corporation (SPC) step-chirp radar system. This system utilized pulse widths of 1330 nanoseconds over a bandwidth of 300--1000 MHz to obtain similar resolution to the impulse system. Due to the slow digitizer data throughput in the impulse radar system, data collection rates were significantly higher using the step-chirp system. Additional forest clutter measurements were undertaken in 1992 to increase the amount of data available, and especially to increase the amount of data from the impulse radar system.

Sheen, D.M.; Severtsen, R.H.; Prince, J.M.; Davis, K.C.; Collins, H.D.

1993-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

An augmented reality system for military operations in urban terrain  

E-Print Network (OSTI)

Many future military operations are expected to occur in urban environments. These complex, 3D battlefields introduce many challenges to the dismounted warfighter. Better situational awareness is required for effective operation in urban environments. However, delivering this information to the dismounted warfighter is extremely difficult. For example, maps draw a user's attention away from the environment and cannot directly represent the three-dimensional nature of the terrain. To overcome these difficulties, we are developing the Battlefield Augmented Reality System (BARS). The system consists of a wearable computer, a wireless network system, and a tracked see-through head-mounted display (HMD). The computer generates graphics that, from the user's perspective, appear to be aligned with the actual environment. For example, a building could be augmented to show its name, a plan of its interior, icons to represent reported sniper locations, and the names of adjacent streets. This paper surveys the current state of development of BARS and describes ongoing research efforts. We describe four major research areas. The first is the development of an effective, efficient user interface for displaying data and processing user inputs. The second is the capability for collaboration between multiple BARS users and other systems. Third, we describe the current hardware for both a mobile and indoor prototype system. Finally, we

Mark A. Livingston; Mark A. Livingston; Lawrence J. Rosenblum; Simon J. Julier; Dennis Brown; Yohan Baillot; J. Edward; Swan Ii; Joseph L. Gabbard; Deborah Hix

2002-01-01T23:59:59.000Z

62

Terrain modeling with multifractional Brownian motion and self-regulating processes  

Science Conference Proceedings (OSTI)

Approximate scale-invariance and local regularity properties of natural terrains suggest that they can be a accurately modeled with random processes which are locally fractal. Current models for terrain modeling include fractional and multifractional ... Keywords: (multifractional)brownian motion, digital elevation models, hölderian regularity

Antoine Echelard; Jacques Lévy Véhel; Olivier Barrière

2010-09-01T23:59:59.000Z

63

Rapid gravity and gravity gradiometry terrain corrections via an adaptive quadtree mesh discretization  

E-Print Network (OSTI)

Rapid gravity and gravity gradiometry terrain corrections via an adaptive quadtree mesh discretization Kristofer Davis1,2 M. Andy Kass1 Yaoguo Li1 1 Center for Gravity, Electrical, and Magnetic Studies of gravity gradiometry surveys utilising an adaptive quadtree mesh discretization. The data- and terrain

64

A Model for Objective Simulation of Boundary-Layer Winds in an Area of Complex Terrain  

Science Conference Proceedings (OSTI)

An objective analysis model is formulated to simulate the boundary-layer wind field in an area of complex terrain on the island of Oahu, Hawaii. The model is designed to reproduce the effects of the terrain on the undisturbed trade wind flow in ...

D. André Erasmus

1986-12-01T23:59:59.000Z

65

Rough Terrain Autonomous Mobility—Part 2: An Active Vision, Predictive Control Approach  

Science Conference Proceedings (OSTI)

Off-road autonomous navigation is one of the most difficult automation challenges from the point of view of constraints on mobility, speed of motion, lack of environmental structure, density of hazards, and typical lack of prior information. ... Keywords: autonomous vehicles, goal-seeking, mobile robots, obstacle avoidance, requirements analysis, rough terrain mobility, terrain mapping, trajectory generation

Alonzo Kelly; Anthony Stentz

1998-05-01T23:59:59.000Z

66

Optimization of scale and parametrization for terrain segmentation: An application to soil-landscape modeling  

Science Conference Proceedings (OSTI)

This paper presents a procedure to optimize parametrization and scale for terrain-based environmental modeling. The workflow was exemplified on crop yield data, which is assumed to represent a proxy for soil productivity. Focal mean statistics were used ... Keywords: Curvature, Focal mean statistics, OBIA, Regression, Soil productivity., Terrain segmentation

Lucian Drgu; Thomas Schauppenlehner; Andreas Muhar; Josef Strobl; Thomas Blaschke

2009-09-01T23:59:59.000Z

67

I/o-efficient efficient algorithms for computing contours on a terrain  

Science Conference Proceedings (OSTI)

A terrain M is the graph of a bivariate function. We assume that M is represented as a triangulated surface with N vertices. A contour (or isoline) of M is a connected component of a level set of M. Generically, each contour is a closed ... Keywords: contours, geographical information systems, i/o-efficient algorithms, terrains

Pankaj K. Agarwal; Lars Arge; Thomas Mølhave; Bardia Sadri

2008-06-01T23:59:59.000Z

68

Observations of a Terrain-Forced Mesoscale Vortex and Canyon Drainage Flows along the Front Range of Colorado  

Science Conference Proceedings (OSTI)

Observations taken during the February 1991 Atmospheric Studies in Complex Terrain (ASCOT) Winter Validation Study are used to describe the wind field associated with a terrain-forced mesoscale vortex and thermally forced canyon drainage flows ...

David H. Levinson; Robert M. Banta

1995-07-01T23:59:59.000Z

69

Producing Satellite-Derived Irradiances in Complex Arid Terrain | OpenEI  

Open Energy Info (EERE)

Producing Satellite-Derived Irradiances in Complex Arid Terrain Producing Satellite-Derived Irradiances in Complex Arid Terrain Dataset Summary Description (Abstract): This paper describes a methodology to correct satellite-derived irradiances over complex terrain. The correction applies to satellite models using visible images from geostationary satellites. (Purpose): Solar model documentation Source SUNY Albany Date Released June 26th, 2003 (11 years ago) Date Updated August 29th, 2003 (11 years ago) Keywords methodology solar SWERA UNEP validation Data application/pdf icon Download Report (pdf, 690.1 KiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage Frequency Time Period 1999 - 2002 License License Other or unspecified, see optional comment below Comment Please cite publication as follows: Perez, R., Ineichen, P., Moore, K., Kmiecik, M., Renné, D., and George, R. 2002.Producing Satellite-Derived Irradiances in Complex Arid Terrain. ASES 2003, Austin TX and submitted for publication in Solar Energy

70

A Simple Method for Spatial Interpolation of the Wind in Complex Terrain  

Science Conference Proceedings (OSTI)

The topographical elevation difference is proposed as a new variable for spatial interpolation of the sparse surface wind measurements to a finer mesh in a complex terrain area. The most used method for the initialization of diagnostic wind field ...

I. Palomino; F. Martín

1995-07-01T23:59:59.000Z

71

Terrain-Induced Turbulence over Lantau Island: 7 June 1994 Tropical Storm Russ Case Study  

Science Conference Proceedings (OSTI)

Numerical simulations of terrain-induced turbulence associated with airflow over Lantau Island of Hong Kong are presented. Lantau is a relatively small island with three narrow peaks rising to between 700 and 950 m above mean sea level. This ...

Terry L. Clark; Teddie Keller; Janice Coen; Peter Neilley; Hsiao-ming Hsu; William D. Hall

1997-07-01T23:59:59.000Z

72

Gravity Wave Breaking over the Central Alps: Role of Complex Terrain  

Science Conference Proceedings (OSTI)

The characteristics of gravity waves excited by the complex terrain of the central Alps during the intensive observational period (IOP) 8 of the Mesoscale Alpine Programme (MAP) is studied through the analysis of aircraft in situ measurements, ...

Qingfang Jiang; James D. Doyle

2004-09-01T23:59:59.000Z

73

Geolocation of man-made reservoirs across terrains of varying complexity using GIS  

Science Conference Proceedings (OSTI)

The Reservoir Sedimentation Survey Information System (RESIS) is one of the world's most comprehensive databases of reservoir sedimentation rates, comprising nearly 6000 surveys for 1819 reservoirs across the continental United States. Sediment surveys ... Keywords: DEM, GIS, Reservoir sedimentation, Terrain complexity

David M. Mixon; David A. Kinner; Robert F. Stallard; James P. M. Syvitski

2008-10-01T23:59:59.000Z

74

Transferability of a Three-Dimensional Air Quality Model between Two Different Sites in Complex Terrain  

Science Conference Proceedings (OSTI)

The three-dimensional, diagnostic, particle-in-cell transport and diffusion model MATHEW/ADPIC is used to test its transferability from one site in complex terrain to another with different characteristics, under stable nighttime drainage flow ...

Rolf Lange

1989-07-01T23:59:59.000Z

75

An Investigation of Terrain Effects on the Mesoscale Spectrum of Atmospheric Motions  

Science Conference Proceedings (OSTI)

Wind and temperature data collected on commercial aircraft during the Global Atmospheric Sampling Program (GASP) are used to investigate the effects of underlying terrain on mesoscale variability, and the observational results are interpreted ...

G. D. Nastrom; D. C. Fritts; K. S. Gage

1987-10-01T23:59:59.000Z

76

An Examination of Residual Wind Fluctuations Observed at 10 m over Flat Terrain  

Science Conference Proceedings (OSTI)

This study investigates the behavior of wind fluctuations observed at the 10-m level over a flat terrain site located some 100 km east of the Rocky Mountains. The purposes were to assess residual fluctuations in order to ascertain effects ...

D. M. Leahey; M. C. Hansen; M. B. Schroeder

1996-01-01T23:59:59.000Z

77

Numerical Study of Terrain-Induced Mesoscale Motions in a Mixed Layer  

Science Conference Proceedings (OSTI)

Numerical integrations using a potential enstrophy conserving scheme are presented for the flow within a mixed layer over hilly terrain using the hydrostatic shallow-water equations with a quadratic drag law. The mesoscale area treated is 150 km ...

Y-J. Han; K. Ueyoshi; J. W. Deardorff

1982-11-01T23:59:59.000Z

78

Hazard avoidance for high-speed rough-terrain unmanned ground vehicles  

E-Print Network (OSTI)

High-speed unmanned ground vehicles have important applications in rough-terrain. In these applications unexpected and dangerous situations can occur that require rapid hazard avoidance maneuvers. At high speeds, there is ...

Spenko, Matthew J. (Matthew Julius), 1976-

2005-01-01T23:59:59.000Z

79

Lidar Descriptions of Mixing-Layer Thickness Characteristics in a Complex Terrain/Coastal Environment  

Science Conference Proceedings (OSTI)

Airborne lidar and supplementary measurements made during a major study of air chemistry in southern California (SCCCAMP 1985) provided a rare opportunity to examine atmospheric boundary-layer structure in a coastal area with complex terrain. ...

James L. McElroy; Ted B. Smith

1991-05-01T23:59:59.000Z

80

Orographic Clouds in Terrain-Blocked Flows: An Idealized Modeling Study  

Science Conference Proceedings (OSTI)

Idealized numerical simulations of moist strongly stratified flow over topography are used to study the processes that control orographic clouds in terrain-blocked flows as a joint function of the nondimensional flow parameter Nh/U, the ...

Joseph Galewsky

2008-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

On the Ability of the WRF Model to Reproduce the Surface Wind Direction over Complex Terrain  

Science Conference Proceedings (OSTI)

The ability of the Weather Research and Forecasting (WRF) model to reproduce the surface wind direction over complex terrain is examined. A simulation spanning a winter season at a high horizontal resolution of 2 km is compared with wind direction ...

Pedro A. Jiménez; Jimy Dudhia

2013-07-01T23:59:59.000Z

82

Empirical-Statistical Method to Estimate the Surface Wind Speed over Complex Terrain  

Science Conference Proceedings (OSTI)

An empirical-statistical method to estimate surface wind speed over complex terrain under strong wind condition is proposed. This method is based on the postulation that the surface wind speed depends on a surface roughness parameter and a ...

Hiromi Yamazawa; Junsei Kondo

1989-09-01T23:59:59.000Z

83

Radiosity Approach for the Shortwave Surface Radiation Balance in Complex Terrain  

Science Conference Proceedings (OSTI)

The influence of topography on the radiation balance in complex terrain has so far been investigated either with very simple or very sophisticated approaches that are limited, respectively, by an uncontrolled spatial representation of radiative ...

Nora Helbig; Henning Löwe; Michael Lehning

2009-09-01T23:59:59.000Z

84

Mesoscale Modeling and Four-Dimensional Data Assimilation in Areas of Highly Complex Terrain  

Science Conference Proceedings (OSTI)

A multiscale four-dimensional data assimilation (FDDA) technique, based on Newtonian relaxation, is incorporated into a mesoscale model and evaluated using meteorological and tracer data collected during the Atmospheric Studies in Complex Terrain ...

J. D. Fast

1995-12-01T23:59:59.000Z

85

The Principles of Laboratory Modeling of Stratified Atmospheric Flows over Complex Terrain  

Science Conference Proceedings (OSTI)

Laboratory modeling provides a reasonably quick and relatively inexpensive method for investigating stratified air Row around mesoscale topography. Quantitative results for stratified flow over complex terrain may be obtained from suitably ...

Peter G. Baines; Peter C. Manins

1989-11-01T23:59:59.000Z

86

Regional-Scale Flows in Mountainous Terrain. Part II: Simplified Numerical Experiments  

Science Conference Proceedings (OSTI)

A series of two- and three-dimensional idealized numerical experiments are conducted to examine the effects of different physical processes upon the development of the thermally driven regional-scale circulations over mountainous terrain ...

James E. Bossert; William R. Cotton

1994-07-01T23:59:59.000Z

87

Three-Dimensional Numerical Model Simulations of Airflow Over Mountainous Terrain: A Comparison with Observations  

Science Conference Proceedings (OSTI)

Numerical simulations of airflow over two different choices of mountainous terrain and the comparisons of results with aircraft observations are presented. Two wintertime casts for flow over Elk Mountain, Wyoming where surface heating is assumed ...

Terry L. Clark; Robert Gall

1982-07-01T23:59:59.000Z

88

Spatial Interpolation of Meteorological Data in Complex Terrain Using Temporal Statistics  

Science Conference Proceedings (OSTI)

Diagnostic wind field numerical models have significant difficulty developing representative wind velocities in complex terrain. A large of this difficulty begins with the initial wind field interpolation. If this interpolated wind field does not ...

William Porch; Daniel Rodriguez

1987-12-01T23:59:59.000Z

89

A Forward-in-Time Anelastic Nonhydrostatic Model in a Terrain-Following Coordinate  

Science Conference Proceedings (OSTI)

A three-dimensional (3D) forward-in-time anelastic nonhydrostatic model in a terrain-following coordinate is developed to investigate mesoscale circulations over topography. The anelastic nonhydrostatic model utilizes the deep-continuity equation,...

Ching-Yuang Huang

2000-07-01T23:59:59.000Z

90

An Analysis of Wind Direction and Horizontal Wind Component Fluctuations over Complex Terrain  

Science Conference Proceedings (OSTI)

Based on an extensive wind dataset over complex terrain, the commonly used small-angle approximation ?v ? ??V is studied and found to overestimate over all wind speeds and ?? values observed. This should be anticipated due to the assumptions ...

K. H. Papadopoulos; C. G. Helmis; G. T. Amanatidis

1992-09-01T23:59:59.000Z

91

Implications of Small-Scale Flow Features to Modeling Dispersion over Complex Terrain  

Science Conference Proceedings (OSTI)

Small-scale, topographically forced wind systems often have a strong influence on flow over complex terrain. A problem is that these systems are very difficult to measure, because of their limited spatial and temporal extent. They can be ...

R. M. Banta; L. D. Olivier; P. H. Gudiksen; R. Lange

1996-03-01T23:59:59.000Z

92

Impact of Environmental Variations on Simulated Squall Lines Interacting with Terrain  

Science Conference Proceedings (OSTI)

The complex evolution of convective systems crossing (or attempting to cross) mountainous terrain represents a substantial forecasting challenge. This study examines the processes associated with environments of “crossing” squall lines (which were ...

Casey E. Letkewicz; Matthew D. Parker

2011-10-01T23:59:59.000Z

93

QNH: Mesoscale Bounded Derivative Initialization and Winter Storm Test over Complex Terrain  

Science Conference Proceedings (OSTI)

Mesoscale bounded derivative initialization (BDI) is utilized to derive dynamical constraints, from which elliptic equations are formulated to derive smooth initial fields over complex terrain for mesoscale models. The initialization is ...

J. L. Lee; A. E. MacDonald

2000-04-01T23:59:59.000Z

94

An implementation of terrain geomorphing in the vertex shader for synthetic planetary surfaces  

E-Print Network (OSTI)

The purpose of this research is to develop the three-dimensional models of planetary surfaces which can be used in the test environments for the Vision-Based Navigation Systems' (VBNS) terrain recognition and navigation ...

Colagiovanni, Lawrence W. (Lawrence William)

2008-01-01T23:59:59.000Z

95

Geostatistical Mapping of Precipitation from Rain Gauge Data Using Atmospheric and Terrain Characteristics  

Science Conference Proceedings (OSTI)

A geostatistical framework for integrating lower-atmosphere state variables and terrain characteristics into the spatial interpolation of rainfall is presented. Lower-atmosphere state variables considered are specific humidity and wind, derived ...

Phaedon C. Kyriakidis; Jinwon Kim; Norman L. Miller

2001-11-01T23:59:59.000Z

96

Spatial Snow Modeling of Wind-Redistributed Snow Using Terrain-Based Parameters  

Science Conference Proceedings (OSTI)

Wind is widely recognized as one of the dominant controls of snow accumulation and distribution in exposed alpine regions. Complex and highly variable wind fields in rugged terrain lead to similarly complex snow distribution fields with areas of ...

Adam Winstral; Kelly Elder; Robert E. Davis

2002-10-01T23:59:59.000Z

97

Relationship of Synoptic Winds and Complex Terrain Flows during the MISTRAL Field Experiment  

Science Conference Proceedings (OSTI)

The relationship between the surface and synoptic wind direction is examined climatologically in a complex terrain region. Surface winds were observed over a 1-yr period during the MISTRAL project in the Basel, Switzerland, area. The measurement ...

Rudolf O. Weber; Pirmin Kaufmann

1998-11-01T23:59:59.000Z

98

Derivation of Effective Aerodynamic Surface Roughness in Urban Areas from Airborne Lidar Terrain Data  

Science Conference Proceedings (OSTI)

An automated technique was developed that uses only airborne lidar terrain data to derive the necessary parameters for calculation of effective aerodynamic surface roughness in urban areas. The technique provides parameters for geometric models ...

Donald E. Holland; Judith A. Berglund; Joseph P. Spruce; Rodney D. McKellip

2008-10-01T23:59:59.000Z

99

A System for the Hourly Assimilation of Surface Observations in Mountainous and Flat Terrain  

Science Conference Proceedings (OSTI)

An assimilation system is presented that was designed to provide timely, detailed, and coherent analyses of surface data, even when the data are collected in rough terrain where station elevations differ widely and observations are often subject ...

Patricia A. Miller; Stanley G. Benjamin

1992-10-01T23:59:59.000Z

100

Diagnostic Wind Field Modeling for Complex Terrain: Model Development and Testing  

Science Conference Proceedings (OSTI)

A three dimensional diagnostic wind field model is shown to be capable of generating potential flow solutions associated with simple terrain features. This is achieved by modifying an initially uniform background wind to make the flow divergence ...

D. G. Ross; I. N. Smith; P. C. Manins; D. G. Fox

1988-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Verification of Mesoscale Numerical Weather Forecasts in Mountainous Terrain for Application to Avalanche Prediction  

Science Conference Proceedings (OSTI)

Two high-resolution, real-time, numerical weather prediction (NWP) models are verified against case study observations to quantify their accuracy and skill in the mountainous terrain of western Canada. These models, run daily at the University of ...

Claudia Roeger; Roland Stull; David McClung; Joshua Hacker; Xingxiu Deng; Henryk Modzelewski

2003-12-01T23:59:59.000Z

102

The Energy Budget of Canadian Shield Subarctic Terrain and Its Impact on Hillslope Hydrological Processes  

Science Conference Proceedings (OSTI)

The objective of the study is to determine the local processes that control the partitioning of the energy budget of shield terrain in the western Canadian subarctic. The magnitude of the spring snowmelt and its potential to flood exposed bedrock ...

Christopher Spence; Wayne R. Rouse

2002-04-01T23:59:59.000Z

103

Sensitivities of Orographic Precipitation to Terrain Geometry and Upstream Conditions in Idealized Simulations  

Science Conference Proceedings (OSTI)

This study examines how variations in relatively simple terrain geometries influence orographic precipitation and its spatial patterns of sensitivity to small changes in upstream conditions. An idealized three-dimensional model is used to simulate ...

Campbell D. Watson; Todd P. Lane

2012-04-01T23:59:59.000Z

104

Near-Real-Time Applications of a Mesoscale Analysis System to Complex Terrain  

Science Conference Proceedings (OSTI)

Several mesoscale data analysis systems are reviewed, of which one is then adapted and applied to the complex terrain of northwest Utah and the western United States. The analysis system relies on the simple, but computationally efficient, ...

Steven M. Lazarus; Carol M. Ciliberti; John D. Horel; Keith A. Brewster

2002-10-01T23:59:59.000Z

105

Geostatistical Mapping of Mountain Precipitation Incorporating Autosearched Effects of Terrain and Climatic Characteristics  

Science Conference Proceedings (OSTI)

Hydrologic and ecologic studies in mountainous terrain are sensitive to the temporal and spatial distribution of precipitation. In this study a geostatistical model, Auto-Searched Orographic and Atmospheric Effects Detrended Kriging (ASOADeK), is ...

Huade Guan; John L. Wilson; Oleg Makhnin

2005-12-01T23:59:59.000Z

106

A Mesoscale Analysis Method for Surface Potential Temperature in Mountainous and Coastal Terrain  

Science Conference Proceedings (OSTI)

A technique is developed to anisotropically spread surface observations in steep valleys. The goal is to create an improved objective analysis for the lowest, terrain-following numerical weather prediction (NWP) model level in mountainous ...

Xingxiu Deng; Roland Stull

2005-02-01T23:59:59.000Z

107

A Simple Model for Correcting Sodar and Lidar Errors in Complex Terrain  

Science Conference Proceedings (OSTI)

Ground-based sensing of wind profiles by sodars and lidars is becoming the standard for wind energy and other applications. However, there remain difficulties in complex terrain since the instruments sense wind components in spatially separated ...

Stuart Bradley

2012-12-01T23:59:59.000Z

108

Airborne Doppler Lidar Measurements of Valley Flows in Complex Coastal Terrain  

Science Conference Proceedings (OSTI)

Three-dimensional winds obtained with an airborne Doppler lidar are used to investigate the spatial structure of topographically driven flows in complex coastal terrain in Southern California. The airborne Doppler lidar collected four hours of ...

S. F. J. De Wekker; K. S. Godwin; G. D. Emmitt; S. Greco

2012-08-01T23:59:59.000Z

109

Elsevier Editorial System(tm) for Computer Vision and Image Understanding Manuscript Draft Manuscript Number: Title: Terrain Modelling from lidar range data in natural landscapes: a predictive and Bayesian framework Article Type: Special Issue: New Advanc  

E-Print Network (OSTI)

Abstract: The Earth's topography, including vegetation and human-made features, reduced to a virtual 3D representation is a key geographic layer for any extended development or risk management project. Processed from multiple aerial images, or from airborne lidar systems, the 3D topography is first represented as a point cloud. This article deals with the generation of Digital Terrain Models in natural landscapes. We present a global methodology for estimating the terrain height by deriving a predictive filter paradigm. Under the assumption that the terrain topography (elevation and slope) is regular in a neighbouring system, a predictive filter combines linearly the predicted topographic values and the effective measured values. In this paper, it is applied to 3D lidar data which are known to be of high altimetric accuracy. The algorithm generates an adaptive local geometry wherein the altimetric distribution of the point cloud is analysed. Since local terrain elevations depend on the local slope, a predictive filter is first applied on the slopes then on the terrain elevations. The algorithm propagates through the point cloud following specific rules in order to optimize the probability of computing areas containing terrain points. Considered as an initial surface, theprevious DTM is finally regularized in a Bayesian framework. Our approach is based on the definition of an energy function that manages the evolution of a terrain surface. The energy is designed as a compromise between a data attraction term and a regularization term. The minimum of this energy corresponds to the

unknown authors

2008-01-01T23:59:59.000Z

110

Applicability of digital terrain analyses to wind energy prospecting and siting  

DOE Green Energy (OSTI)

The recent publication of the Digital Elevation Model (DEM) database by the US Geological Survey (USGS) has provided a unique opportunity for the development of cost-effective wind energy prospecting technology. This database contains terrain elevation values on a Latitude-Longitude grid with a resolution of 3 arc-seconds (about 90 m) for the contiguous United States, Hawaii, and Puerto Rico. This database has been coupled with software that will produce shaded-relief maps on a laser printer in a format compatible with the state wind power maps in the US wind energy atlas. By providing a much higher resolution of the terrain features than was possible when the US atlas was prepared, these maps can be useful in general wind prospecting activities. As highly resolved as the 90-m DEM data seem to be when compared to the atlas grid, they still appear to be too coarse to resolve terrain features in the detail required for local wind flow characterization and wind plant layout. Gridded terrain data at about 10-m resolution are available from the USGS for some areas of the United States. In areas where these data are unavailable, they may be generated by digitizing and gridding the contours from a 1:24,000-scale USGS map over the area of interest. Comparisons of terrain profiles from cross sections of the 10-m and 90-m data provide an indication of the effect of resolution on the reliability of terrain feature representation. Oblique views of the terrain in shaded-relief format provide a dramatic enhancement of the shape and relative position of features of interest.

Wendell, L.L.; Gower, G.L.; Birn, M.B. [Pacific Northwest Lab., Richland, WA (United States); Castellano, C.C. [USDOE, Washington, DC (United States)

1993-07-01T23:59:59.000Z

111

Wind Regimes in Complex Terrain of the Great Valley of Eastern Tennessee  

Science Conference Proceedings (OSTI)

This research was designed to provide an understanding of physical wind mechanisms within the complex terrain of the Great Valley of Eastern Tennessee to assess the impacts of regional air flow with regard to synoptic and mesoscale weather changes, wind direction shifts, and air quality. Meteorological data from 2008 2009 were analyzed from 13 meteorological sites along with associated upper level data. Up to 15 ancillary sites were used for reference. Two-step complete linkage and K-means cluster analyses, synoptic weather studies, and ambient meteorological comparisons were performed to generate hourly wind classifications. These wind regimes revealed seasonal variations of underlying physical wind mechanisms (forced channeled, vertically coupled, pressure-driven, and thermally-driven winds). Synoptic and ambient meteorological analysis (mixing depth, pressure gradient, pressure gradient ratio, atmospheric and surface stability) suggested up to 93% accuracy for the clustered results. Probabilistic prediction schemes of wind flow and wind class change were developed through characterization of flow change data and wind class succession. Data analysis revealed that wind flow in the Great Valley was dominated by forced channeled winds (45 67%) and vertically coupled flow (22 38%). Down-valley pressure-driven and thermally-driven winds also played significant roles (0 17% and 2 20%, respectively), usually accompanied by convergent wind patterns (15 20%) and large wind direction shifts, especially in the Central/Upper Great Valley. The behavior of most wind regimes was associated with detectable pressure differences between the Lower and Upper Great Valley. Mixing depth and synoptic pressure gradients were significant contributors to wind pattern behavior. Up to 15 wind classes and 10 sub-classes were identified in the Central Great Valley with 67 joined classes for the Great Valley at-large. Two-thirds of Great Valley at-large flow was defined by 12 classes. Winds flowed on-axis only 40% of the time. The Great Smoky Mountains helped create down-valley pressure-driven winds, downslope mountain breezes, and divergent air flow. The Cumberland Mountains and Plateau were associated with wind speed reductions in the Central Great Valley, Emory Gap Flow, weak thermally-driven winds, and northwesterly down sloping. Ridge-and-valley terrain enhanced wind direction reversals, pressure-driven winds, as well as locally and regionally produced thermally-driven flow.

Birdwell, Kevin R [ORNL

2011-05-01T23:59:59.000Z

112

A High-Resolution Air Pollution Model Suitable for Dispersion Studies in Complex Terrain  

Science Conference Proceedings (OSTI)

The development of an air pollution transport model that uses an expanding terrain-following coordinate with high resolution in analytic form near the surface and a high-order accurate transport algorithm is described. The model is designed to be ...

Ming Liu; John J. Carroll

1996-10-01T23:59:59.000Z

113

An Experimental Investigation on the Wake Interference of Wind Turbines Sited Over Complex Terrains  

E-Print Network (OSTI)

1 An Experimental Investigation on the Wake Interference of Wind Turbines Sited Over Complex, 50011 An experimental study was conducted to investigate the interferences of wind turbines sited over conducted in a large wind tunnel with of wind turbine models sited over a flat terrain (baseline case

Hu, Hui

114

Procedural Reproduction of Terrain Textures with Geographic Data Carsten Dachsbacher1,3  

E-Print Network (OSTI)

. As a consequence the native instructions of a GPU's pixel shader allow a very simple imple- mentation. The procedural model is imple- mented as vertex and fragment shaders and entirely executed on graphics hardware Textures for Terrain Rendering. In Shader X4 (2005), Charles River Media. [Fai05] FAIRCLOUGH M.: Terragen v

Bolch, Tobias

115

Dynamical Downscaling of Wind Speed in Complex Terrain Prone To Bora-Type Flows  

Science Conference Proceedings (OSTI)

The results of numerically modeled wind speed climate, a primary component of wind energy resource assessment in the complex terrain of Croatia, are given. For that purpose, dynamical downscaling of 10 yr (1992–2001) of the 40-yr ECMWF Re-Analysis ...

Kristian Horvath; Alica Baji?; Stjepan Ivatek-Šahdan

2011-08-01T23:59:59.000Z

116

A Flash-Flooding Storm at the Steep Edge of High Terrain: Disaster in the Himalayas  

Science Conference Proceedings (OSTI)

Flash floods on the edge of high terrain, such as the Himalayas or Rocky Mountains, are especially dangerous and hard to predict. The Leh flood of 2010 at the edge of the Himalayan Plateau in India is an example of the tragic consequences of such storms. ...

Kristen L. Rasmussen; Robert A. Houze Jr.

2012-11-01T23:59:59.000Z

117

Electric Utility Terrain Vehicle Demonstration at a Military Base in Florida  

Science Conference Proceedings (OSTI)

Non-road electric vehicles such as lift trucks, airport ground support equipment and underground mining vehicles have proven themselves in the marketplace. However, heavy-duty utility-terrain vehicles (UTVs) powered exclusively by electricity have been introduced only recently. To test the capabilities of electric UTVs, two demonstration vehicles were instrumented for data acquisition and placed in ...

2013-07-31T23:59:59.000Z

118

Sink placement on a 3D terrain for border surveillance in wireless sensor networks  

Science Conference Proceedings (OSTI)

With their distributed nature and redundant operation capability, wireless sensor networks are very suitable for border surveillance scenarios that track intruders trying to breach to a safe side. In such scenarios, keeping the operation going on for ... Keywords: Border surveillance, Discrete event simulation, Genetic algorithms, Sink placement, Three dimensional terrain, Wireless sensor networks

Rabun Kosar; Cem Ersoy

2012-02-01T23:59:59.000Z

119

Visual Terrain Mapping for Mars Exploration1,2 0-7803-8155-6/04/$17.00 2004 IEEE  

E-Print Network (OSTI)

1 Visual Terrain Mapping for Mars Exploration1,2 1 0-7803-8155-6/04/$17.00© 2004 IEEE 2 IEEEAC. The techniques used include wide-baseline stereo mapping for terrain distant from the rover, bundle adjustment images. However, current rover technologies do not allow rovers to autonomously navigate to distant

Li, Rongxing Â?RonÂ?

120

The Influence of Groundwater Flow on Thermal Regimes in Mountainous Terrain  

DOE Green Energy (OSTI)

Active circulation of cool groundwater in mountainous terrain can cause an advective disturbance of the thermal regime. This factor complicates interpretation of data collected in geothermal exploration programs. An isothermal free-surface model has been developed which provides qualitative insight into the nature of an advective disturbance as it is affected by topography, permeability and climate. A fully coupled model of fluid and heat transfer is being developed for quantitative study of idealized mountain hydrothermal systems.

Forster, Craig; Smith, Leslie

1986-01-21T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Surface Energy Balance of the Western and Central Canadian Subarctic: Variations in the Energy Balance among Five Major Terrain Types  

Science Conference Proceedings (OSTI)

In this study, the surface energy balance of 10 sites in the western and central Canadian subarctic is examined. Each research site is classified into one of five terrain types (lake, wetland, shrub tundra, upland tundra, and coniferous forest) ...

Andrea K. Eaton; Wayne R. Rouse; Peter M. Lafleur; Philip Marsh; Peter D. Blanken

2001-09-01T23:59:59.000Z

122

Analysis of WRF Model Wind Estimate Sensitivity to Physics Parameterization Choice and Terrain Representation in Andalusia (Southern Spain)  

Science Conference Proceedings (OSTI)

This paper reports on an evaluation of the relative roles of choice of parameterization scheme and terrain representation in the Weather Research and Forecasting (WRF) mesoscale model, in the context of a regional wind resource assessment. As a ...

F. J. Santos-Alamillos; D. Pozo-Vázquez; J. A. Ruiz-Arias; V. Lara-Fanego; J. Tovar-Pescador

2013-07-01T23:59:59.000Z

123

Radar-Based Quantitative Precipitation Estimation for the Cool Season in Complex Terrain: Case Studies from the NOAA Hydrometeorology Testbed  

Science Conference Proceedings (OSTI)

This study explores error sources of the National Weather Service operational radar-based quantitative precipitation estimation (QPE) during the cool season over the complex terrain of the western United States. A new, operationally geared radar ...

Jian Zhang; Youcun Qi; David Kingsmill; Kenneth Howard

2012-12-01T23:59:59.000Z

124

Isobaric Height Perturbations Associated with Mountain Waves Measured by Aircraft during the Terrain-Induced Rotor Experiment  

Science Conference Proceedings (OSTI)

It has only been in the last few years that accurate measurement of the horizontal pressure gradient has been possible over complex terrain using an airborne platform. To infer forcing mechanisms for the wind, an independent measure of the height ...

Thomas R. Parish; Larry D. Oolman

2012-12-01T23:59:59.000Z

125

An Intense, Quasi-Steady Thunderstorm over Mountainous Terrain. Part II: Doppler Radar Observations of the Storm Morphological Structure  

Science Conference Proceedings (OSTI)

An analysis of an intense, quasi-steady thunderstorm which developed over mountainous terrain is presented. This storm, extensively analyzed using multiple Doppler radar and surface mesonet data, formed within an environment having strong low-...

Kevin R. Knupp; William R. Cotton

1982-02-01T23:59:59.000Z

126

Examination of Errors in Near-Surface Temperature and Wind from WRF Numerical Simulations in Regions of Complex Terrain  

Science Conference Proceedings (OSTI)

The performance of an advanced research version of the Weather Research and Forecasting Model (WRF) in predicting near-surface atmospheric temperature and wind conditions under various terrain and weather regimes is examined. Verification of 2-m ...

Hailing Zhang; Zhaoxia Pu; Xuebo Zhang

2013-06-01T23:59:59.000Z

127

Evaluation of Turbulence Closure Models for Large-Eddy Simulation over Complex Terrain: Flow over Askervein Hill  

Science Conference Proceedings (OSTI)

The evaluation of turbulence closure models for large-eddy simulation (LES) has primarily been performed over flat terrain, where comparisons with theory and observations are simplified. The authors have previously developed improved closure ...

Fotini Katopodes Chow; Robert L. Street

2009-05-01T23:59:59.000Z

128

An Immersed Boundary Method Enabling Large-Eddy Simulations of Flow over Complex Terrain in the WRF Model  

Science Conference Proceedings (OSTI)

This paper describes a three-dimensional immersed boundary method (IBM) that facilitates the explicit resolution of complex terrain within the Weather Research and Forecasting (WRF) model. Two interpolation methods—trilinear and inverse distance ...

Katherine A. Lundquist; Fotini Katopodes Chow; Julie K. Lundquist

2012-12-01T23:59:59.000Z

129

High-Resolution Large-Eddy Simulations of Scalar Transport in Atmospheric Boundary Layer Flow over Complex Terrain  

Science Conference Proceedings (OSTI)

This paper presents high-resolution numerical simulations of the atmospheric flow and concentration fields accompanying scalar transport and diffusion from a point source in complex terrain. Scalar dispersion is affected not only by mean flow, ...

Takenobu Michioka; Fotini Katopodes Chow

2008-12-01T23:59:59.000Z

130

Modeling Wind Field and Pollution Transport over a Complex Terrain Using an Emergency Dose Information Code SPEEDI  

Science Conference Proceedings (OSTI)

Atmospheric dispersion code system SPEEDI (System for Prediction of Environmental Emergency Dose Information) has been applied to simulate the field experiments conducted over a complex terrain. A diagnostic mass-consistent wind field model of ...

R. Venkatesan; M. Möllmann-Coers; A. Natarajan

1997-09-01T23:59:59.000Z

131

Adding Complex Terrain and Stable Atmospheric Condition Capability to the Simulator for On/Offshore Wind Farm Applications (SOWFA) (Presentation)  

DOE Green Energy (OSTI)

This presentation describes changes made to NREL's OpenFOAM-based wind plant aerodynamics solver so that it can compute the stably stratified atmospheric boundary layer and flow over terrain. Background about the flow solver, the Simulator for Off/Onshore Wind Farm Applications (SOWFA) is given, followed by details of the stable stratification/complex terrain modifications to SOWFA, along with some preliminary results calculations of a stable atmospheric boundary layer and flow over a simple set of hills.

Churchfield, M. J.

2013-06-01T23:59:59.000Z

132

Adding Complex Terrain and Stable Atmospheric Condition Capability to the Simulator for On/Offshore Wind Farm Applications (SOWFA) (Presentation)  

SciTech Connect

This presentation describes changes made to NREL's OpenFOAM-based wind plant aerodynamics solver so that it can compute the stably stratified atmospheric boundary layer and flow over terrain. Background about the flow solver, the Simulator for Off/Onshore Wind Farm Applications (SOWFA) is given, followed by details of the stable stratification/complex terrain modifications to SOWFA, along with some preliminary results calculations of a stable atmospheric boundary layer and flow over a simple set of hills.

Churchfield, M. J.

2013-06-01T23:59:59.000Z

133

Final Report of the Grant: ''Vertical Transport and Mixing in Complex Terrain Airsheds''  

SciTech Connect

Stable stratification associated with nocturnal thermal circulation in areas of complex terrain leads to interesting and important phenomena that govern local meteorology and contaminant dispersion. Given that most urban areas are in complex topography, understanding and prediction of such phenomena are of immediate practical importance. This project dealt with theoretical, laboratory, numerical and field experimental studies aimed at understanding stratified flow and turbulence phenomena in urban areas, with particular emphasis on flow, turbulence and contaminant transport and diffusion in such flows. A myriad of new results were obtained and some of these results were used to improve the predictive capabilities of the models.

Harindra Joseph Fernando James Anderson Don Boyer Neil Berman

2004-12-29T23:59:59.000Z

134

Effects of all-terrain vehicle trails on stream channel characteristics, Ouachita National Forest, Arkansas  

E-Print Network (OSTI)

Research shows that road and trail crossings have negative impacts on forest streams, and that off-road vehicles are detrimental to the environment. However, little information is available concerning the effects of such vehicles on stream channels and riverine environments. This research investigates the effects of all-terrain vehicles (ATVs), one of the many types of off-road vehicles, on stream channel characteristics in the Ouachita National Forest, Arkansas, where the Wolf Pen Gap All-Terrain Vehicle Trail system was built and opened to public use in 1991. Statistical analysis revealed significant differences in stream pool characteristics between the "pristine" control stream (Caney Creek) and those affected by ATV trails (Board Camp Creek and Gap Creek) in the national forest. Pools in Board Camp Creek and Gap Creek were found to have increased amounts of sands and fines, higher values of embeddedness, lower depths, and less volume. These characteristics are consistent with observations that ATV trails are primary sources of sediment input into stream channels. Statistical differences in pool characteristics between streams affected by forest roads (Brushy Creek) and those by ATV trails were also revealed, although forest roads apparently impact streams to a lesser extent than ATV trails. The effects of roads and trails on stream pool characteristics were illustrated using Geographic Information Systems. These findings have important implications for the ecological integrity of stream systems in areas affected by ATV trails. They also contribute potentially valuable information in the management context.

Rohrer, Deven Michelle

2001-01-01T23:59:59.000Z

135

Regional Weather Prediction with a Model Combining Terrain-following and Isentropic Coordinates. Part I: Model Description  

Science Conference Proceedings (OSTI)

A short-range numerical prediction model, which is part of a real-time 3-h data assimilation and forecast system, is described. The distinguishing feature of the model is the use of terrain-following (?) coordinate surfaces in the lower ...

Rainer Bleck; Stanley G. Benjamin

1993-06-01T23:59:59.000Z

136

Numerical Study of Terrain-Induced Mesoscale Motions and Hydrostatic Form Drag in a Heated, Growing Mixed Layer  

Science Conference Proceedings (OSTI)

A four-layer three-dimensional model whose lowest layer is a time and space-dependent, well-mixed boundary layer is employed over artificial, irregular terrain on the mesoscale during a daytime heating cycle. Only if the surface heating and mixed-...

J. W. Deardorff; K. Ueyoshi; Y-J. Han

1984-04-01T23:59:59.000Z

137

Shear Wave Velocity Structure of Southern African Crust: Evidence for Compositional Heterogeneity within Archaean and Proterozoic Terrains  

Science Conference Proceedings (OSTI)

Crustal structure in southern Africa has been investigated by jointly inverting receiver functions and Rayleigh wave group velocities for 89 broadband seismic stations spanning much of the Precambrian shield of southern Africa. 1-D shear wave velocity profiles obtained from the inversion yield Moho depths that are similar to those reported in previous studies and show considerable variability in the shear wave velocity structure of the lower part of the crust between some terrains. For many of the Archaean and Proterozoic terrains in the shield, S velocities reach 4.0 km/s or higher over a substantial part of the lower crust. However, for most of the Kimberley terrain and adjacent parts of the Kheis Province and Witwatersrand terrain, as well as for the western part of the Tokwe terrain, mean shear wave velocities of {le} 3.9 km/s characterize the lower part of the crust along with slightly ({approx}5 km) thinner crust. These findings indicate that the lower crust across much of the shield has a predominantly mafic composition, except for the southwest portion of the Kaapvaal Craton and western portion of the Zimbabwe Craton, where the lower crust is intermediate-to-felsic in composition. The parts of the Kaapvaal Craton underlain by intermediate-to-felsic lower crust coincide with regions where Ventersdorp rocks have been preserved, and thus we suggest that the intermediate-to-felsic composition of the lower crust and the shallower Moho may have resulted from crustal melting during the Ventersdorp tectonomagmatic event at c. 2.7 Ga and concomitant crustal thinning caused by rifting.

Kgaswane, E M; Nyblade, A A; Julia, J; Dirks, P H H M; Durrheim, R J; Pasyanos, M E

2008-11-11T23:59:59.000Z

138

Characterization of the ROAMS Simulation Environment for Testing Rover Mobility on Sloped Terrain  

E-Print Network (OSTI)

in the tight arcs due to interaction of the wheels with the underlying mixed sand and concrete paving stones types (clay, loose sand, mixed, etc.). 2.7. Wheel-soil contact model The primary goal of the wheel table has a mosaic of paving stones glued to a plywood surface and covered with a layer of fine sand

139

Effects of Terrain Heights and Sizes on Island-Scale Circulations and Rainfall for the Island of Hawaii during HaRP  

Science Conference Proceedings (OSTI)

Islands in Hawaii have different sizes and terrain heights with notable differences in climate and weather. In this study, the fifth-generation Pennsylvania State University–NCAR Mesoscale Model (MM5) land surface model (LSM) is used to conduct ...

Yang Yang; Yi-Leng Chen

2008-01-01T23:59:59.000Z

140

Estimating the Urban Heat Island Contribution to Urban and Rural Air Temperature Differences over Complex Terrain: Application to an Arid City  

Science Conference Proceedings (OSTI)

This study proposes a method for estimating the canopy-layer net urban heat island (UHI) in regions with complex terrain that lack preurban observations. The approach is based on a linear relationship between the urban–rural temperature ...

Hadas Saaroni; Baruch Ziv

2010-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Role of Topography in Forcing Low-Level Jets in the Central United States during the 1993 Flood-Altered Terrain Simulations  

Science Conference Proceedings (OSTI)

Regional model sensitivity simulations in which the height of elevated terrain was reduced to explore simulated changes in features of the low-level jet (LLJ) are presented. Such an approach has not been reported, and it provides complementary ...

Zaitao Pan; Moti Segal; Raymond W. Arritt

2004-01-01T23:59:59.000Z

142

Weather Forecasts by the WRF-ARW Model with the GSI Data Assimilation System in the Complex Terrain Areas of Southwest Asia  

Science Conference Proceedings (OSTI)

This paper will first describe the forecasting errors encountered from running the National Center for Atmospheric Research (NCAR) mesoscale model (the Advanced Research Weather Research and Forecasting model; ARW) in the complex terrain of ...

J. Xu; S. Rugg; L. Byerle; Z. Liu

2009-08-01T23:59:59.000Z

143

Downscaling Climate over Complex Terrain: High Finescale (<1000 m) Spatial Variation of Near-Ground Temperatures in a Montane Forested Landscape (Great Smoky Mountains)  

Science Conference Proceedings (OSTI)

Landscape-driven microclimates in mountainous terrain pose significant obstacles to predicting the response of organisms to atmospheric warming, but few if any studies have documented the extent of such finescale variation over large regions. ...

Jason D. Fridley

2009-05-01T23:59:59.000Z

144

A Numerical Sensitivity Study on the Impact of Soil Moisture on Convection-Related Parameters and Convective Precipitation over Complex Terrain  

Science Conference Proceedings (OSTI)

The impact of soil moisture on convection-related parameters and convective precipitation over complex terrain is studied by numerical experiments using the nonhydrostatic Consortium for Small-Scale Modeling (COSMO) model. For 1 day of the ...

Christian Barthlott; Norbert Kalthoff

2011-12-01T23:59:59.000Z

145

Modeling Snow-Cover Heterogeneity over Complex Arctic Terrain for Regional and Global Climate Models  

Science Conference Proceedings (OSTI)

The small-scale (10 to 100 m) and local-scale (100 m to 10 km) effects of topography (elevation, slope, and aspect) and snow redistribution by wind on the evolution of the snowmelt are investigated. The chosen study area is the 142 km2 Upper ...

Stephen J. Déry; Wade T. Crow; Marc Stieglitz; Eric F. Wood

2004-02-01T23:59:59.000Z

146

Tech. Rep. MSSU-COE-ERC-00-13, Engineering Research Center, Mississippi State University, 2000. Decoding of Large Terrains Using a Hardware Rendering Pipeline  

E-Print Network (OSTI)

the transmission and storage of enormous quantities of data [?]. For example, the application of interest of a digital elevation map (DEM) providing a 3D terrain surface; coupled to this 3D surface is an image mosaic between grid points of the DEM are generated. With larger DEMs, the sheer number of polygons can overwhelm

Fowler, James E.

147

Quarterly Journal of the Royal Meteorological Society Q. J. R. Meteorol. Soc. 136: 593616, April 2010 Part A Summer monsoon convection in the Himalayan region: Terrain  

E-Print Network (OSTI)

2010 Part A Summer monsoon convection in the Himalayan region: Terrain and land cover effects Socorro summer monsoon, convection occurs frequently near the Himalayan foothills. However, the nature-resolution numerical simulations and available observations from two case-studies and of the monsoon climatology

Niyogi, Dev

148

Influence of initial and boundary conditions for ozone modeling in very complex terrains: A case study in the northeastern Iberian Peninsula  

Science Conference Proceedings (OSTI)

Initial (IC) and boundary conditions (BC) are required in order to solve the set of stiff differential equations included in air quality models. In this work, the influences of IC-BC are analyzed in the northeastern Iberian Peninsula (NEIP) by applying ... Keywords: Air quality modeling, Complex terrains, Initial and boundary conditions, Ozone, Photochemistry

Pedro Jiménez; René Parra; José M. Baldasano

2007-09-01T23:59:59.000Z

149

The Effect of Topographic Variability on Initial Condition Sensitivity of Low-Level Wind Forecasts. Part II: Experiments Using Real Terrain and Observations  

Science Conference Proceedings (OSTI)

A study by Bieringer et al., which is Part I of this two-part study, demonstrated analytically using the shallow-water equations and numerically in controlled experiments that the presence of terrain can result in an enhancement of sensitivities ...

Paul E. Bieringer; Peter S. Ray; Andrew J. Annunzio

2013-07-01T23:59:59.000Z

150

Block-Iterative Method of Solving the Nonhydrostatic Pressure in Terrain-Following Coordinates: Two-Level Pressure and Truncation Error Analysis  

Science Conference Proceedings (OSTI)

A technique for the treatment of the pressure in anelastic, nonhydrostatic terrain-following coordinates is described. It involves the use of two levels of pressure in such a manner so as to ensure that the anelastic mass-continuity equation is ...

Terry L. Clark

2003-07-01T23:59:59.000Z

151

Rapid gravity and gravity gradiometry terrain correction via adaptive quadtree mesh discretization Kristofer Davis, M. Andy Kass, and Yaoguo Li, Center for Gravity, Electrical and Magnetic Studies, Colorado School  

E-Print Network (OSTI)

Rapid gravity and gravity gradiometry terrain correction via adaptive quadtree mesh discretization Kristofer Davis, M. Andy Kass, and Yaoguo Li, Center for Gravity, Electrical and Magnetic Studies, Colorado School of Mines SUMMARY We present a method for modeling the terrain response in gravity and gravity

152

Precipitation over Concave Terrain  

Science Conference Proceedings (OSTI)

Many topographic barriers are comprised of a series of concave or convex ridges that modulate the intensity and distribution of precipitation over mountainous areas. In this model-based idealized study, stratiform precipitation associated with ...

Qingfang Jiang

2006-09-01T23:59:59.000Z

153

Rainfall and Climate Variation over a Sloping New Mexico Plateau during the North American Monsoon  

Science Conference Proceedings (OSTI)

The distribution of rainfall and other climatic variables is studied over sloping terrain surrounding Los Alamos in northern New Mexico. Long-term rainfall records and over 10 years of data measured routinely from a raingauge array and several ...

Brent M. Bowen

1996-12-01T23:59:59.000Z

154

Principal facts and a discussion of terrain correction methods for the complete Bouguer gravity anomaly map of the Cascade Mountains, Washington  

DOE Green Energy (OSTI)

Since 1974, the Division of Geology and Earth Resources, in conjunction with the US Department of Energy, has supported gravity studies in the Cascade Mountains of Washington State. Results of the Cascade gravity project are summarized graphically as a complete Bouguer gravity anomaly map of the Cascade Mountains, Washington (Danes and Phillips, 1983). This report provides supplementary data and documentation for the complete Bouguer gravity anomaly map. Presented are principal gravity facts, simple Bouguer and Free-air gravity anomalies, computational methods, error analysis and a discussion of terrain corrections.

Danes, Z.F.; Phillips, W.M.

1983-02-01T23:59:59.000Z

155

Correction and commentary for "Ocean forecasting in terrain-following coordinates: Formulation and skill assessment of the regional ocean modeling system" by Haidvogel et al., J. Comp. Phys. 227, pp. 3595-3624  

Science Conference Proceedings (OSTI)

Although our names appear as co-authors in the above article (Haidvogel et al. (2008) [1], hereafter H2008), we were not aware of its existence until after it was published. In reading the article, we discovered that a significant portion of it (~40%, ... Keywords: Conservation and constancy preservation, Regional ocean modeling, Split-explicit time stepping, Terrain-following coordinates

Alexander F. Shchepetkin; James C. McWilliams

2009-12-01T23:59:59.000Z

156

Dispersion Parameters over Forested Terrain  

Science Conference Proceedings (OSTI)

A unique set of micrometeorological data was obtained during a 1967–70 multidisciplinary environmental field program in a tropical forest environment. The program was under the sponsorship of the Advanced Research Project Agency (ARPA) and was ...

R. T. Pinker; J. Z. Holland

1988-11-01T23:59:59.000Z

157

Thuderstorm-Producing Terrain Features  

Science Conference Proceedings (OSTI)

Thunderstorms were traced back to their initiation sites to determine areas of repeated thunderstorm genesis over the Sangre de Cristo Mountains of Colorado and New Mexico. Using three summers of GOES data it was found that genesis-zone activity ...

Crystal Barker Schaaf; Robert M. Banta; Joshua Wurman

1988-03-01T23:59:59.000Z

158

Placement of Traffic Barriers on Roadside and Median Slopes  

E-Print Network (OSTI)

Cross median crashes have become a serious problem in recent years. Most of the median cross sections used for divided highways have terrains with steep slopes. Traffic barriers, frequently used on slopes, are generally designed based on the findings obtained from crash tests performed on flat terrain. For barriers placed on roadside and median slopes, vehicle impact height varies depending on the trajectory of the vehicle along the ditch section and lateral offset of the barrier. Thus depending on the placement location on a relatively steep slope, a barrier can be impacted by an errant vehicle at height and orientation more critical compared to those considered during its design. Hence, detailed study of performance of barriers on roadside and median slopes is needed to achieve acceptable safety performance. In this study, performances of modified G4(1S) W-beam, Midwest Guardrail System (MGS), modified Thrie-beam, modified weak post W-beam, and box-beam guardrail systems on sloped terrains are investigated using numerical simulations. A procedure is developed that provide guidance for their placement on roadside and median slopes. The research approach consists of nonlinear finite element analyses and multi-rigid-body dynamic analyses approach. Detailed finite element representation for each of the barriers is developed using LS-DYNA. Model fidelity is assessed through comparison of simulated and measured responses reported in full scale crash test studies conducted on flat terrain. LS-DYNA simulations of vehicle impacts on barriers placed on flat terrain at different impact heights are performed to identify performance limits of the barriers in terms of acceptable vehicle impact heights. The performances of the barriers are evaluated following the guidelines provided in NCHRP Report 350. Multi-rigid-body dynamic analysis code, CARSIM, is used to identify trajectories of the vehicles traversing various roadside and median cross-slopes. After analyzing vehicle trajectories and barrier performance limits, a guideline has been prepared with recommendations for the placement of barriers along roadside and median slopes. This guideline is then verified and refined using the responses obtained from full-scale LS-DYNA simulations. These simulations capture the full encroachment event from departure of the vehicle off the traveled way through impact with the barrier.

Ferdous, Md Rubiat

2011-05-01T23:59:59.000Z

159

The Use of Satellite Imagery and Surface Pressure-Gradient Analysis Modified for Sloping Terrain to Analyze the Mesoscale Events Preceding the Severe Hailstorms of 2 August 1986  

Science Conference Proceedings (OSTI)

Conditions leading up to an outbreak of severe hailstorms in northeast Colorado are examined using satellite and surface data. A persistent mesoscale ridge of surface-high pressure, caused by outflow from a mesoscale- convective system, is seen ...

John F. Weaver; James J. Toth

1990-06-01T23:59:59.000Z

160

Terrain effects in resistivity and magnetotelluric surveys  

Science Conference Proceedings (OSTI)

A three-dimensional finite element computer algorithm which can accommodate arbitrarily complex topography and subsurface structure, has been developed to model the resistivity response of the earth. The algorithm has undergone extensive evaluation and is believed to provide accurate results for realistic earth models. Testing included comparison to scale model measurements, analytically calculated solutions, and results calculated numerically by other independent means. Computer modeling experiments have demonstrated that it is possible to remove the effect of topography on resistivity data under conditions where such effects dominate the response. This can be done without resorting to lengthy and costly trial and error computer modeling. After correction, the data can be interpreted with confidence that the anomalies are due only to subsurface structure. The results of case studies on resistivity field data measured in high relief topography are discussed.

Holcombe, H.T.

1982-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Nonlinear Balance in Terrain-Following Coordinates  

Science Conference Proceedings (OSTI)

Potential vorticity (PV) is a powerful concept in geophysical fluid dynamics. One property of PV that makes it so powerful is that it may be inverted under certain conditions, one of which is the imposition of a balance constraint. Previous ...

Steven G. Decker

2010-02-01T23:59:59.000Z

162

Surface Wind Regionalization in Complex Terrain  

Science Conference Proceedings (OSTI)

Daily wind variability in the Comunidad Foral de Navarra in northern Spain was studied using wind observations at 35 locations to derive subregions with homogeneous temporal variability. Two different methodologies based on principal component ...

P. A. Jiménez; E. García-Bustamante; J. F. González-Rouco; F. Valero; J. P. Montávez; J. Navarro

2008-01-01T23:59:59.000Z

163

productivity by use of digital terrain analysis  

Science Conference Proceedings (OSTI)

mechanisms for using biological sinks to offset fossil fuel emissions. It is necessary to elucidate the spatial vari- ability of forest productivity for developing

164

TERRAINOSAURUS REALISTIC TERRAIN SYNTHESIS USING GENETIC ALGORITHMS  

E-Print Network (OSTI)

skin macroenvironment keep hair SCs quies- cent (12). Telogen HFs in C phase are devoid activation, or non- autonomously, when activators are delivered by the surrounding macroenvironment between HFs by the skin macroenvironment. Together, HF and skin macroenvironment­derived ligands and antag

Keyser, John

165

West Slope, Oregon: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Slope, Oregon: Energy Resources Slope, Oregon: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 45.496985°, -122.76938° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":45.496985,"lon":-122.76938,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

166

The Climatological Skill of a Regional Model over Complex Terrain  

Science Conference Proceedings (OSTI)

As part of an ongoing study of the regional climate and hydrology of the southwestern United States, in this paper we investigate the systematic biases of two versions of the PSU/NCAR mesoscale model (MM4). These are a standard version and one ...

Filippo Giorgi; Gary T. Bates

1989-11-01T23:59:59.000Z

167

A Physically Based Daily Hydrometeorological Model for Complex Mountain Terrain  

Science Conference Proceedings (OSTI)

This paper describes the continued development of the physically based hydrometeorological model Generate Earth Systems Science input (GENESYS) and its application in simulating snowpack in the St. Mary (STM) River watershed, Montana. GENESYS is ...

Ryan J. MacDonald; James M. Byrne; Stefan W. Kienzle

2009-12-01T23:59:59.000Z

168

A Study of the Influence of Terrain on Fog Development  

Science Conference Proceedings (OSTI)

A general purpose mesoscale numerical weather prediction model is used to simulate the development of fog at Perth, Western Australia, on 27 April 1990. Using one-dimensional and two-dimensional model configurations, an attempt is made to ...

B. W. Golding

1993-09-01T23:59:59.000Z

169

A Bistatic Sodar for Precision Wind Profiling in Complex Terrain  

Science Conference Proceedings (OSTI)

A new ground-based wind profiling technology—a scanned bistatic sodar—is described. The motivation for this design is to obtain a “mastlike” wind vector profile in a single atmospheric column extending from the ground to heights of more than 200 ...

Stuart Bradley; Sabine von Hünerbein; Torben Mikkelsen

2012-08-01T23:59:59.000Z

170

Mesoscale Snowfall Prediction and Verification in Mountainous Terrain  

Science Conference Proceedings (OSTI)

Short-term forecasting of precipitation often relies on meteorological radar coverage to provide information on the intensity, extent, and motion of approaching mesoscale features. However, in significant portions of mountainous regions, radar ...

Melanie Wetzel; Michael Meyers; Randolph Borys; Ray McAnelly; William Cotton; Andrew Rossi; Paul Frisbie; David Nadler; Douglas Lowenthal; Stephen Cohn; William Brown

2004-10-01T23:59:59.000Z

171

Length Scales of the Neutral Wind Profile over Homogeneous Terrain  

Science Conference Proceedings (OSTI)

The wind speed profile for the neutral boundary layer is derived for a number of mixing-length parameterizations, which account for the height of the boundary layer. The wind speed profiles show good agreement with the reanalysis of the Leipzig ...

Alfredo Peña; Sven-Erik Gryning; Jakob Mann; Charlotte B. Hasager

2010-04-01T23:59:59.000Z

172

Minimalistic Control of a Compass Gait Robot in Rough Terrain  

E-Print Network (OSTI)

Although there has been an increasing interest in dynamic bipedal locomotion for significant improvement of energy efficiency and dexterity of mobile robots in the real world, their locomotion capabilities are still mostly ...

Iida, Fumiya

173

High-Resolution Aeromagnetic Mapping Of Volcanic Terrain, Yellowstone...  

Open Energy Info (EERE)

magnetic lows. This implies that fractures localize the hot springs. Magnetic gradient trends reflect the mapped Basin and Range structural trends of north and northwest, as well...

174

A Mesoscale Data Analysis and Downscaling Method over Complex Terrain  

Science Conference Proceedings (OSTI)

A mesoscale data analysis method for meteorological station reports is presented. Irregularly distributed measured values are combined with measurement-independent a priori information about the modification of analysis fields due to topographic ...

Reinhold Steinacker; Matthias Ratheiser; Benedikt Bica; Barbara Chimani; Manfred Dorninger; Wolfgang Gepp; Christoph Lotteraner; Stefan Schneider; Simon Tschannett

2006-10-01T23:59:59.000Z

175

Spectral Characteristics of the Convective Boundary Layer Over Uneven Terrain  

Science Conference Proceedings (OSTI)

The paper describes a convective boundary layer experiment conducted in April 1978 at the Boulder Atmospheric Observatory, and examines the spectral behavior of wind velocity and temperature from the Observatory's 300 m tower, from aircraft ...

J. C. Kaimal; R. A. Eversole; D. H. Lenschow; B. B. Stankov; P. H. Kahn; J. A. Businger

1982-05-01T23:59:59.000Z

176

Approaches for Averaging Surface Parameters and Fluxes over Heterogeneous Terrain  

Science Conference Proceedings (OSTI)

Successful prediction of possible climate change depends on realistic parameterization of land surface processes in climate models. Such parameterizations must take appropriate account of the heterogeneities that are found in most earth surfaces. ...

A. Chehbouni; E. G. Njoku; J-P. Lhomme; Y. H. Kerr

1995-05-01T23:59:59.000Z

177

MESOSCALE MODELLING OF WIND ENERGY OVER NON-HOMOGENEOUS TERRAIN  

E-Print Network (OSTI)

. Im Mittelpunkt stand die Vorstellung von Forschungs- projekten, die das BMU im Bereich der Offshore-Windenergie.spiekerooger-klimagespraeche.de Windenergie mit Potenzial Die Windenergie habe auf abseh- bare Zeit in Deutschland von allen erneuerbaren (BMU), Katherina Reiche, an- lässlich der Eröffnung der 3. Offshore- Wissenschaftstage in Oldenburg

Pielke, Roger A.

178

The Juneau Terrain-Induced Turbulence Alert System  

Science Conference Proceedings (OSTI)

The Juneau, Alaska, airport vicinity experiences frequent episodes of moderate and severe turbulence, which affect arriving and departing air traffic. The Federal Aviation Administration funded the National Center for Atmospheric Research to ...

Marcia K. Politovich; R. Kent Goodrich; Corrinne S. Morse; Alan Yates; Robert Barron; Steven A. Cohn

2011-03-01T23:59:59.000Z

179

Two-Zone Convective Scaling of Diffusion in Complex Terrain  

Science Conference Proceedings (OSTI)

A “two-zone” convective scaling equation is developed that allows for a step change in scaling parameters. The results of the Lompoc Valley Diffusion Experiment, conducted at coastal site in California under variable cloud cover, are compared to ...

C. E. Skupniewicz

1994-05-01T23:59:59.000Z

180

Correlation of Real and Model Wind Speeds in Different Terrains  

Science Conference Proceedings (OSTI)

Wind speeds over a 6-month period from 21 surface stations, 3 upper-wind stations, and 2 different models are compared. Similar data are used for three different topographic regions of New Zealand broadly classed as having low, moderate, and high ...

Steve J. Reid; Richard Turner

2001-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Learning to visually predict terrain properties for planetary rovers  

E-Print Network (OSTI)

For future planetary exploration missions, improvements in autonomous rover mobility have the potential to increase scientific data return by providing safe access to geologically interesting sites that lie in rugged ...

Brooks, Christopher Allen, 1978-

2009-01-01T23:59:59.000Z

182

Mythical Terrain and the Building of Mexico’s UNAM  

E-Print Network (OSTI)

and the Environment in Mexico, 2005. No. 14: Kevin P.Trueba, El Pedregal de San Angel. Mexico City: UniversidadNacional Autónoma de Mexico (1995). 5. See Mario Pani and

Davids, René

2008-01-01T23:59:59.000Z

183

North Slope of Alaska  

NLE Websites -- All DOE Office Websites (Extended Search)

govSitesNorth Slope of Alaska govSitesNorth Slope of Alaska NSA Related Links Facilities and Instruments Barrow Atqasuk ES&H Guidance Statement Operations Science Field Campaigns Visiting the Site Images Information for Guest Scientists Contacts North Slope of Alaska Barrow: 71° 19' 23.73" N, 156° 36' 56.70" W Atqasuk: 70° 28' 19.11" N, 157° 24' 28.99" W The North Slope of Alaska (NSA) site is providing data about cloud and radiative processes at high latitudes. Centered at Barrow and extending to the south (to the vicinity of Atqasuk), west (to the vicinity of Wainwright), and east (towards Oliktok), the NSA site has become a focal point for atmospheric and ecological research activity on the North Slope. The principal instrumented facility was installed near Barrow in 1997,

184

Slope Currents and “JEBAR”  

Science Conference Proceedings (OSTI)

For currants along continental slopes, the joint effect of baroclinicity and bottom relief (JEBAR) provides important local forcing, comparable with the wind stress. The poleward density increase (or corresponding sea level decline) typically ...

J. M. Huthnance

1984-04-01T23:59:59.000Z

185

Steep Slope Calculator  

NLE Websites -- All DOE Office Websites (Extended Search)

Steep Slope Calculator Steep Slope Calculator Estimates Cooling and Heating Savings for Residential Roofs with Non-Black Surfaces Enter A State: Select a state Alabama Alaska Arkansas Arizona California Colorado Connecticut Delaware Florida Georgia Hawaii Iowa Idaho Illinois Indiana Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana North Carolina North Dakota Nebraska Nevada New Hampshire New Jersey New Mexico New York Ohio Oklahoma Oregon Pennsylvania Pacific Islands Puerto Rico Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington Wisconsin West Virginia Wyoming Canadian Cities Enter A City: Select a city Click to see Data for All 243 Locations Roof Inputs: R-value(Btu-in/(hr ft2 oF):

186

Assimilating Surface Weather Observations from Complex Terrain into a High-Resolution Numerical Weather Prediction Model  

Science Conference Proceedings (OSTI)

An anisotropic surface analysis method based on the mother–daughter (MD) approach has been developed to spread valley station observations to grid points in circuitous steep valleys. In this paper, the MD approach is further refined to allow ...

Xingxiu Deng; Roland Stull

2007-03-01T23:59:59.000Z

187

Evaluation of Two Land Surface Schemes Used in Terrains of Increasing Aridity in West Africa  

Science Conference Proceedings (OSTI)

In this study different parameterizations for land surface models currently employed in meteorological models at ECMWF [Tiled ECMWF Surface Scheme for Exchange Processes over Land (TESSEL)] and NCEP (Noah) are evaluated for a semiarid region in ...

D. Schüttemeyer; A. F. Moene; A. A. M. Holtslag; H. A. R. de Bruin

2008-04-01T23:59:59.000Z

188

A New Approach to Humanitarian Demining. Part 1: Mobile Platform for Operation on Unstructured Terrain  

Science Conference Proceedings (OSTI)

Landmines can deprive whole areas of valuable resources, and continue to kill and cause injuries years after the end of armed conflicts. Armored vehicles are used for mine clearance, but with limited reliability. The final inspection of minefields is ... Keywords: buggy, combustion engine, demining, landmines

Paulo Debenest; Edwardo F. Fukushima; Yuki Tojo; Shigeo Hirose

2005-05-01T23:59:59.000Z

189

Terminal Doppler Weather Radar Observation of Atmospheric Flow over Complex Terrain during Tropical Cyclone Passages  

Science Conference Proceedings (OSTI)

A Terminal Doppler Weather Radar (TDWR) started operation in Hong Kong, China, in 1997 for monitoring wind shear associated with thunderstorms affecting the Hong Kong International Airport. The airport was built on land reclaimed from the sea and ...

C. M. Shun; S. Y. Lau; O. S. M. Lee

2003-12-01T23:59:59.000Z

190

Hydrometeorological Short-Range Ensemble Forecasts in Complex Terrain. Part II: Economic Evaluation  

Science Conference Proceedings (OSTI)

Two economic models are employed to perform a value assessment of short-range ensemble forecasts of 24-h precipitation probabilities for hydroelectric reservoir operation.

Doug McCollor; Roland Stull

2008-08-01T23:59:59.000Z

191

A Tornadic Supercell over Elevated, Complex Terrain: The Divide, Colorado, Storm of 12 July 1996  

Science Conference Proceedings (OSTI)

A supercell storm that produced a tornado and large hail over the Rocky Mountains is documented with WSR-88D data, a damage survey, and visual observations. This case study demonstrates how well the WSR-88D Doppler radar was able to detect this ...

Howard B. Bluestein

2000-03-01T23:59:59.000Z

192

Influence of Grid Size and Terrain Resolution on Wind Field Predictions from an Operational Mesoscale Model  

Science Conference Proceedings (OSTI)

One of the activities of the National Oceanic and Atmospheric Administration's Air Resources Laboratory is to predict the consequences of atmospheric releases of radioactivity and other potentially harmful materials. This paper describes the ...

Jeffery T. McQueen; Roland R. Draxler; Glenn D. Rolph

1995-10-01T23:59:59.000Z

193

Multiscale Analysis of a Meso-? Frontal Passage in the Complex Terrain of the Colorado Front Range  

Science Conference Proceedings (OSTI)

Data from a mesoscale observing network are used to describe the evolution of a complex boundary between a dry air mass near the foothills of the Rocky Mountains and a shallow moist air mass over the eastern plains. Synoptic-scale analyses ...

Lisa S. Darby; William D. Neff; Robert M. Banta

1999-09-01T23:59:59.000Z

194

Hydrometeorological Accuracy Enhancement via Postprocessing of Numerical Weather Forecasts in Complex Terrain  

Science Conference Proceedings (OSTI)

Statistical postprocessing techniques such as model output statistics are used by national weather centers to improve the skill of numerical forecasts. However, many of these techniques require an extensive database to develop, maintain, and ...

Doug McCollor; Roland Stull

2008-02-01T23:59:59.000Z

195

Surface-Layer Fluxes, Profiles, and Turbulence Measurements over Uniform Terrain under Near-Neutral Conditions  

Science Conference Proceedings (OSTI)

An atmospheric surface-layer experiment over a nearly uniform plowed field was performed to determine the constants in the flux-profile similarity formulas, particularly the von Kármán constant. New instruments were constructed to minimize flow ...

Steven P. Oncley; Carl A. Friehe; John C. Larue; Joost A. Businger; Eric C. Itsweire; Sam S. Chang

1996-04-01T23:59:59.000Z

196

Scaling Evaluation of the Effect of Surface Characteristics on Potential for Deep Convection over Uniform Terrain  

Science Conference Proceedings (OSTI)

The effect of surface characteristics on the daytime change in the potential for development of deep convection resulting from surface flux of heat and moisture is evaluated by conceptual, scaling, and numerical modeling approaches. It is shown ...

M. Segal; R. W. Arritt; C. Clark; R. Rabin; J. Brown

1995-02-01T23:59:59.000Z

197

Hydrometeorological Short-Range Ensemble Forecasts in Complex Terrain. Part I: Meteorological Evaluation  

Science Conference Proceedings (OSTI)

This paper addresses the question of whether it is better to include lower-resolution members of a nested suite of numerical precipitation forecasts to increase ensemble size, or to utilize high-resolution members only to maximize forecast ...

Doug McCollor; Roland Stull

2008-08-01T23:59:59.000Z

198

Coevolution of Down-Valley Flow and the Nocturnal Boundary Layer in Complex Terrain  

Science Conference Proceedings (OSTI)

An enhanced National Center for Atmospheric Research (NCAR) integrated sounding system (ISS) was deployed as part of the Vertical Transport and Mixing (VTMX) field experiment, which took place in October of 2000. The enhanced ISS was set up at ...

J. O. Pinto; D. B. Parsons; W. O. J. Brown; S. Cohn; N. Chamberlain; B. Morley

2006-10-01T23:59:59.000Z

199

Flow in Complex Terrain: Observations by Radar Wind Profilers and Anemometers near Juneau, Alaska  

Science Conference Proceedings (OSTI)

Four years of data from three radar wind profilers and collocated anemometers are used to examine the airflow regimes near Juneau, Alaska. Wind direction probability density functions and wind rose histograms show the dominant wind speeds and ...

Stephen A. Cohn

2004-04-01T23:59:59.000Z

200

The effects of cultural noise on controlled source electromagnetic resonses of subsurface fractures in resistive terrain  

E-Print Network (OSTI)

Controlled source electromagnetic (CSEM) geophysics has been used with a fair amount of success in near surface hydrogeological studies. Recently, these investigations have been conducted frequently in human impacted field sites containing cultural conductors such as metal fences and buried pipes. Cultural noise adds an element of complexity to the geological interpretation of this type of data. This research investigates the influence of mutual induction between two buried targets in a CSEM experiment. In particular, it looks at the mutual coupling between a buried cultural conductor and a geological heterogeneity. We attempt to isolate the Hz field induced by tertiary currents in targets caused by mutual coupling. This is achieved with a Texas A&M 3D CSEM finite element code, which calculates the secondary Hz fields emanating from a target buried in a halfspace. Buried geological targets and cultural conductors are modeled as volumetric slabs embedded in a halfspace. A series of models have been simulated to study the effect of varying parameters such as target conductivity, transmitter location and shape of a target on the mutual inductance. In each case, the secondary Hz field is calculated for a model with two slabs, and two models with individual slabs. The mutual coupling is calculated by removing the secondary fields from the individual slab models from the response of a two slab model. The calculations of mutual inductance from a variety of such models suggests a complicated interaction of EM fields between the two targets. However, we can explain most of these complexities by adapting a simple approach to Maxwell’s equations. Although the tertiary Hz field is complicated, it may be useful in the characterization and delineation of electrical heterogeneities in the subsurface, which can then be related to geological features such as fractures or joints. It is seen that the most important factor affecting the mutual coupling is the host conductivity. The results have also shown that mutual coupling is very sensitive to transmitter (TX) location, especially when the TX is positioned near one of the targets.

Fernandes, Roland Anthony Savio

2008-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Numerical Prediction of Submesoscale Flow in the Nocturnal Stable Boundary Layer over Complex Terrain  

Science Conference Proceedings (OSTI)

Numerical weather prediction models often perform poorly for weakly forced, highly variable winds in nocturnal stable boundary layers (SBLs). When used as input to air-quality and dispersion models, these wind errors can lead to large errors in ...

Nelson L. Seaman; Brian J. Gaudet; David R. Stauffer; Larry Mahrt; Scott J. Richardson; Jeffrey R. Zielonka; John C. Wyngaard

2012-03-01T23:59:59.000Z

202

Validation of Solar Radiation Surfaces from MODIS and Reanalysis Data over Topographically Complex Terrain  

Science Conference Proceedings (OSTI)

The magnitude and distribution of incoming shortwave solar radiation (SW?) has significant influence on the productive capacity of forest vegetation. Models that estimate forest productivity require accurate and spatially explicit radiation ...

Todd A. Schroeder; Robbie Hember; Nicholas C. Coops; Shunlin Liang

2009-12-01T23:59:59.000Z

203

Numerical Simulation of a Low-Level Jet over Complex Terrain in Southern Iran  

Science Conference Proceedings (OSTI)

The Lut Desert of Iran is an elongated valley oriented north-northwest to south-southeast. The valley descends southward to the Jaz Murian dry lake through a pass. The Navy’s Coupled Ocean–Atmosphere Mesoscale Prediction System is used to study a ...

Ming Liu; Douglas L. Westphal; Teddy R. Holt; Qin Xu

2000-05-01T23:59:59.000Z

204

Rotor and Subrotor Dynamics in the Lee of Three-Dimensional Terrain  

Science Conference Proceedings (OSTI)

The internal structure and dynamics of rotors that form in the lee of topographic ridges are explored using a series of high-resolution eddy-resolving numerical simulations. Surface friction generates a sheet of horizontal vorticity along the lee ...

James D. Doyle; Dale R. Durran

2007-12-01T23:59:59.000Z

205

Precipitation Estimation in Mountainous Terrain Using Multivariate Geostatistics. Part I: Structural Analysis  

Science Conference Proceedings (OSTI)

Values of average annual precipitation (AAP) are desired for hydrologic studies within a watershed containing Yucca Mountain, Nevada, a potential site for a high-level nuclear-waste repository. Reliable values of AAP are not yet available for ...

Joseph A. Hevesi; Jonathan D. Istok; Alan L. Flint

1992-07-01T23:59:59.000Z

206

Thermally and Dynamically Induced Pressure Features over Complex Terrain from High-Resolution Analyses  

Science Conference Proceedings (OSTI)

Within the Vienna Enhanced Resolution Analysis (VERA) Climatology (VERACLIM) project, the complex influence of topographic structures on the spatial distribution of meteorological parameters has been investigated and evaluated climatologically. ...

Benedikt Bica; Thomas Knabl; Reinhold Steinacker; Matthias Ratheiser; Manfred Dorninger; Christoph Lotteraner; Stefan Schneider; Barbara Chimani; Wolfgang Gepp; Simon Tschannett

2007-01-01T23:59:59.000Z

207

Precipitation Estimation in Mountainous Terrain Using Multivariate Geostatistics. Part II: Isohyetal Maps  

Science Conference Proceedings (OSTI)

Values of average annual precipitation (AAP) may be important for hydrologic characterization of a potential high-level nuclear-waste repository site at Yucca Mountain, Nevada. Reliable measurements of AAP are sparse in the vicinity of Yucca ...

Joseph A. Hevesi; Alan L. Flint; Jonathan D. Istok

1992-07-01T23:59:59.000Z

208

Flow over Heated Terrain. Part I: Linear Theory and Idealized Numerical Simulations  

Science Conference Proceedings (OSTI)

The flow past heated topography is examined with both linear and nonlinear models. It is first shown that the forcing of an obstacle with horizontally homogenous surface heating can be approximated by the forcing of an obstacle with surface ...

N. Andrew Crook; Donna F. Tucker

2005-09-01T23:59:59.000Z

209

A Comparison of Statistical and Dynamical Downscaling of Winter Precipitation over Complex Terrain  

Science Conference Proceedings (OSTI)

Statistical downscaling is widely used to improve spatial and/or temporal distributions of meteorological variables from regional and global climate models. This downscaling is important because climate models are spatially coarse (50–200 km) and ...

Ethan D. Gutmann; Roy M. Rasmussen; Changhai Liu; Kyoko Ikeda; David J. Gochis; Martyn P. Clark; Jimy Dudhia; Gregory Thompson

2012-01-01T23:59:59.000Z

210

Forecasting Sun versus Shade in Complex Terrain for the 2010 Winter Olympic and Paralympic Games  

Science Conference Proceedings (OSTI)

During the 2010 Vancouver Winter Olympic and Paralympic Games in Canada, there were 10 mostly sunny days at the outdoor Olympic venues. The warmth and sunshine, possibly a result of El Niño conditions at the time, significantly reduced snow cover at one ...

Rosie Howard; Roland Stull

2011-10-01T23:59:59.000Z

211

Evaluation of High-Resolution Satellite Precipitation Products over Very Complex Terrain in Ethiopia  

Science Conference Proceedings (OSTI)

This study focuses on the evaluation of 3-hourly, 0.25° × 0.25°, satellite-based precipitation products: the Tropical Rainfall Measuring Mission (TRMM) Multisatellite Precipitation Analysis (TMPA) 3B42RT, the NOAA/Climate Prediction Center ...

Feyera A. Hirpa; Mekonnen Gebremichael; Thomas Hopson

2010-05-01T23:59:59.000Z

212

The coupled development of terrain and vegetation : the case of semiarid grasslands  

E-Print Network (OSTI)

The distribution of vegetation in semiarid landscapes organizes as a function of moisture availability, which is often mediated by the form of the land surface. Simultaneously the processes that shape the land surface are ...

Flores Cervantes, Javier Homero, 1977-

2010-01-01T23:59:59.000Z

213

Effects of climate, physical erosion, parent mineralogy, and dust on chemical erosion rates in mountainous terrain  

E-Print Network (OSTI)

the Idaho Batholith . . . . . . . . . . . . . . . . . . . .and an application of the method in the Idaho Batholithalong two altitudinal transects in the Idaho Batholith

Ferrier, Ken

2009-01-01T23:59:59.000Z

214

Evaluating Satellite-Based Cloud Persistence and Displacement Nowcasting Techniques over Complex Terrain  

Science Conference Proceedings (OSTI)

The Moderate Resolution Imaging Spectroradiometer (MODIS) sensor aboard the Terra and Aqua satellites allows roughly for the same region of Earth to be sampled twice in a nowcasting time frame. Using the MODIS cloud mask at 5-km resolution and ...

Eric M. Guillot; Thomas H. Vonder Haar; John M. Forsythe; Steven J. Fletcher

2012-04-01T23:59:59.000Z

215

Hierarchical visibility for guaranteed search in large-scale outdoor terrain  

Science Conference Proceedings (OSTI)

Searching for moving targets in large environments is a challenging task that is relevant in several problem domains, such as capturing an invader in a camp, guarding security facilities, and searching for victims in large-scale search and rescue scenarios. ... Keywords: Exploration, Guaranteed search, HRI, Human---robot-interaction, Moving target search, Path planning, Pursuit-evasion, Task allocation

A. Kleiner; A. Kolling; M. Lewis; K. Sycara

2013-01-01T23:59:59.000Z

216

Regional-Scale Flows in Mountainous Terrain. Part I: A Numerical and Observational Comparison  

Science Conference Proceedings (OSTI)

This study uses observed data and a numerical simulation to examine the generation of thermally driven flows across the Colorado mountain barrier on meso-? to meso-? scales. The observations were collected from remote surface observing systems at ...

James E. Bossert; William R. Cotton

1994-07-01T23:59:59.000Z

217

Mesoscale Weather Prediction with the RUC Hybrid Isentropic–Terrain-Following Coordinate Model  

Science Conference Proceedings (OSTI)

A mesoscale atmospheric forecast model configured in a hybrid isentropic–sigma vertical coordinate and used in the NOAA Rapid Update Cycle (RUC) for operational numerical guidance is presented. The RUC model is the only quasi-isentropic forecast ...

Stanley G. Benjamin; Georg A. Grell; John M. Brown; Tatiana G. Smirnova; Rainer Bleck

2004-02-01T23:59:59.000Z

218

Estimating the spatial and temporal distribution of snow in mountainous terrain  

E-Print Network (OSTI)

and McMillen, R.T. , 1984. Solar radiation within an oak--J.P. et al. , 2004. Solar radiation transmission through1992. Analysis of solar radiation data for Port Harcourt,

Musselman, Keith Newton

2012-01-01T23:59:59.000Z

219

Mechanisms of Along-Valley Winds and Heat Exchange over Mountainous Terrain  

Science Conference Proceedings (OSTI)

The physical mechanisms leading to the formation of diurnal along-valley winds are investigated over idealized three-dimensional topography. The topography used in this study consists of a valley with a horizontal floor enclosed by two isolated ...

Juerg Schmidli; Richard Rotunno

2010-09-01T23:59:59.000Z

220

The Role of Terrain and Pressure Stresses in Rocky Mountain Lee Cyclones  

Science Conference Proceedings (OSTI)

The earth–atmosphere exchange of storm absolute dynamic circulation by mountain-induced surface pressure stress and the response of the circulation in a Rocky Mountain Ice cyclone is examined. Surface pressure stresses that transfer horizontal ...

Alan C. Czarnetzki; Donald R. Johnson

1996-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Observations of a Subtropical Cold Front in a Region of Complex Terrain  

Science Conference Proceedings (OSTI)

The passage of shallow cold fronts during the late spring and early summer months over the island of Taiwan is often accompanied by heavy rainfall and occasional flash flood episodes. Previous studies have emphasized the weak baroclinicity of ...

Stanley B. Trier; David B. Parsons; Thomas J. Matejka

1990-12-01T23:59:59.000Z

222

Effects of climate, physical erosion, parent mineralogy, and dust on chemical erosion rates in mountainous terrain  

E-Print Network (OSTI)

Puerto Rico . . . . . . . . . . . . . . . . . . . . . .timescales: Measurements at Rio Icacos, Puerto RicoExperimental Forest, Puerto Rico. Earth and Planetary

Ferrier, Ken

2009-01-01T23:59:59.000Z

223

Surface Wind Regionalization over Complex Terrain: Evaluation and Analysis of a High-Resolution WRF Simulation  

Science Conference Proceedings (OSTI)

This study analyzes the daily-mean surface wind variability over an area characterized by complex topography through comparing observations and a 2-km-spatial-resolution simulation performed with the Weather Research and Forecasting (WRF) model ...

Pedro A. Jiménez; J. Fidel González-Rouco; Elena García-Bustamante; Jorge Navarro; Juan P. Montávez; Jordi Vilà-Guerau de Arellano; Jimy Dudhia; Antonio Muñoz-Roldan

2010-02-01T23:59:59.000Z

224

Vision-based terrain classification and classifier fusion for planetary exploration rovers  

E-Print Network (OSTI)

Autonomous rover operation plays a key role in planetary exploration missions. Rover systems require more and more autonomous capabilities to improve efficiency and robustness. Rover mobility is one of the critical components ...

Halatci, Ibrahim

2006-01-01T23:59:59.000Z

225

A knowledge-based fuzzy expert system to analyse degraded terrain  

Science Conference Proceedings (OSTI)

The quality of a site investigation campaign stands and falls with the quality of the preparatory desk study. This article presents a fuzzy expert system that improves conventional desk studies. The evaluation process is referred to as a ''multi-temporal ... Keywords: Aerial photo interpretation, Brownfields, Fuzzy logic, Kriging, Site investigation

Dieter D. Genske; Klemens Heinrich

2009-03-01T23:59:59.000Z

226

Dynamics of Local Circulations in Mountainous Terrain during the RHUBC-II Project  

Science Conference Proceedings (OSTI)

The Radiative Heating in Underexplored Bands Campaign (RHUBC-II) project was held from August to October 2009 in the Atacama Desert in Chile at 5320-m altitude. Observations from this experiment and a high-resolution numerical simulation with the ...

Julio C. Marín; Diana Pozo; Eli Mlawer; David D. Turner; Michel Curé

2013-10-01T23:59:59.000Z

227

A Statistical-Topographic Model for Mapping Climatological Precipitation over Mountainous Terrain  

Science Conference Proceedings (OSTI)

The demand for climatological precipitation fields on a regular grid is growing dramatically as ecological and hydrological models become increasingly linked to geographic information systems that spatially represent and manipulate model output. ...

Christopher Daly; Ronald P. Neilson; Donald L. Phillips

1994-02-01T23:59:59.000Z

228

I/O-Efficient Algorithms for Problems on Grid-Based Terrains  

Science Conference Proceedings (OSTI)

The potential and use of Geographic Information Systems is rapidly increasing due to the increasing availability of massive amounts of geospatial data from projects like NASA's Mission to Planet Earth. However, the use of these massive datasets also ...

Lars Arge; Laura Toma; Jeffrey Scott Vitter

2001-12-01T23:59:59.000Z

229

Ozone Cycles in the Western Mediterranean Basin: Interpretation of Monitoring Data in Complex Coastal Terrain  

Science Conference Proceedings (OSTI)

In summer, the complex layout of the coasts and mountains surrounding the western Mediterranean basin favors the development of mesoscale atmospheric recirculations and the formation of ozone reservoir layers above the coastal areas and the sea. ...

Millán M. Millán; Enrique Mantilla; Rosa Salvador; Adoración Carratalá; Maria José Sanz; Lucio Alonso; Gotzon Gangoiti; Marino Navazo

2000-04-01T23:59:59.000Z

230

An analysis of terrain roughness: Generating a GIS application for prescribed burning.  

E-Print Network (OSTI)

??Prescribed burning is a technique used to rejuvenate pastures by enhancing wildlife habitat, brush control, and removing old growth. The technique has become a science… (more)

Crawford, Matthew Allan

2008-01-01T23:59:59.000Z

231

Effects of climate, physical erosion, parent mineralogy, and dust on chemical erosion rates in mountainous terrain  

E-Print Network (OSTI)

Chemical erosion rates andchemical weathering rates over millennial timescales:mineral-specific chemical weathering rates in saprolite and

Ferrier, Ken

2009-01-01T23:59:59.000Z

232

A Numerical Study of the Effect of Island Terrain on Tropical Cyclones  

Science Conference Proceedings (OSTI)

A triply nested, movable mesh model was used to study the behavior of tropical cyclones encountering island mountain ranges. The integration domain consisted of a 37° wide and 45° long channel, with an innermost mesh resolution of 1/6°. The ...

Morris A. Bender; Robert E. Tuleya; Yoshio Kurihara

1987-01-01T23:59:59.000Z

233

GeneTerrain: visual exploration of differential gene expression profiles organized in native biomolecular interaction networks  

Science Conference Proceedings (OSTI)

We propose a new network visualization technique using scattered data interpolation and surface rendering, based upon a foundation layout of a scalar field. Contours of the interpolated surfaces are generated to support multi-scale visual interaction ...

Qian You; Shiaofen Fang; Jake Yue Chen

2010-03-01T23:59:59.000Z

234

THREE-DIMENSIONAL TERRAIN EFFECTS IN ELECTRICAL AND MAGNETOMETRIC RESISTIVITY SURVEYS  

E-Print Network (OSTI)

1 Introduction The Electrical Resistivity Method • Terrainin Electrical Resistivity Surveys • • • • . • • . • • • • •effects in electrical resistivity and magnetometric

Oppliger, G.L.

2012-01-01T23:59:59.000Z

235

Numerical Simulations of Atmospheric Transport and Diffusion over Coastal Complex Terrain  

Science Conference Proceedings (OSTI)

The purpose of this study was to demonstrate the feasibility of operating the three-dimensional atmospheric models HOTMAC (higher-order turbulence model for atmospheric circulation) and RAPTAD (random puff transport and diffusion) to forecast the ...

T. Yamada; S. Bunker; M. Moss

1992-06-01T23:59:59.000Z

236

Satellite-Based Actual Evapotranspiration over Drying Semiarid Terrain in West Africa  

Science Conference Proceedings (OSTI)

A simple satellite-based algorithm for estimating actual evaporation based on Makkink’s equation is applied to a seasonal cycle in 2002 at three test sites in Ghana, West Africa: at a location in the humid tropical southern region and two in the ...

D. Schüttemeyer; Ch Schillings; A. F. Moene; H. A. R. de Bruin

2007-01-01T23:59:59.000Z

237

Submesoscale Spatiotemporal Variability of North American Monsoon Rainfall over Complex Terrain  

Science Conference Proceedings (OSTI)

The authors analyze information from rain gauges, geostationary infrared satellites, and low earth orbiting radar in order to describe and characterize the submesoscale (<75 km) spatial pattern and temporal dynamics of rainfall in a 50 km × 75 km ...

Mekonnen Gebremichael; Enrique R. Vivoni; Christopher J. Watts; Julio C. Rodríguez

2007-05-01T23:59:59.000Z

238

A Dispersion Model Evaluation Study for Real-Time Application in Complex Terrain  

Science Conference Proceedings (OSTI)

A few tracer experiments were carried out in autumn 1984 and summer 1985 at the Lago Brasimone site, on the Appennini Mountains approximately 50 km south of Bologna with the purpose assessing the atmospheric dispersion of pollutants under ...

F. Desiato

1991-08-01T23:59:59.000Z

239

Snowfall Associated with a Terrain-Generated Convergence Zone during the Winter Icing and Storm Project  

Science Conference Proceedings (OSTI)

The Longmont anticyclone, a region of low-level anticyclonic turning and convergence during episodes of northerly winds along the Front Range of the Rocky Mountains, is documented for a snow event that occurred during the Winter Icing and Storms ...

Douglas A. Wesley; Roy M. Rasmussen; Ben C. Bernstein

1995-10-01T23:59:59.000Z

240

Daytime Boundary Layer Evolution over Mountainous Terrain. Part II: Numerical Studies of Upslope Flow Duration  

Science Conference Proceedings (OSTI)

Numerical simulators of upslope flow forming on the lee side of a heated mountain ridge showed this flow to be a transient phenomenon, in agreement with observations. The simulations, performed with a two-dimensional, dry version of the cloud ...

Robert M. Banta

1986-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

North Slope (Wahluke Slope) expedited response action cleanup plan  

SciTech Connect

The purpose of this action is to mitigate any threat to public health and the environment from hazards on the North Slope and meet the expedited response action (ERA) objective of cleanup to a degree requiring no further action. The ERA may be the final remediation of the 100-I-3 Operable Unit. A No Action record of decision (ROD) may be issued after remediation completion. The US Department of Energy (DOE) currently owns or administers approximately 140 mi{sup 2} (about 90,000 acres) of land north and east of the Columbia River (referred to as the North Slope) that is part of the Hanford Site. The North Slope, also commonly known as the Wahluke Slope, was not used for plutonium production or support facilities; it was used for military air defense of the Hanford Site and vicinity. The North Slope contained seven antiaircraft gun emplacements and three Nike-Ajax missile positions. These military positions were vacated in 1960--1961 as the defense requirements at Hanford changed. They were demolished in 1974. Prior to government control in 1943, the North Slope was homesteaded. Since the initiation of this ERA in the summer of 1992, DOE signed the modified Hanford Federal Agreement and Consent Order (Tri-Party Agreement) with the Washington Department of Ecology (Ecology) and the US Environmental Protection Agency (EPA), in which a milestone was set to complete remediation activities and a draft closeout report by October 1994. Remediation activities will make the North Slope area available for future non-DOE uses. Thirty-nine sites have undergone limited characterization to determine if significant environmental hazards exist. This plan documents the results of that characterization and evaluates the potential remediation alternatives.

Not Available

1994-02-01T23:59:59.000Z

242

Slope County, North Dakota: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

4129398°, -103.5021012° 4129398°, -103.5021012° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":46.4129398,"lon":-103.5021012,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

243

Evaluation of Surface Analyses and Forecasts with a Multiscale Ensemble Kalman Filter in Regions of Complex Terrain  

Science Conference Proceedings (OSTI)

Previous research suggests that an ensemble Kalman filter (EnKF) data assimilation and modeling system can produce accurate atmospheric analyses and forecasts at 30–50-km grid spacing. This study examines the ability of a mesoscale EnKF system ...

Brian C. Ancell; Clifford F. Mass; Gregory J. Hakim

2011-06-01T23:59:59.000Z

244

The Influence of Terrain-Induced Circulations on Wintertime Temperature and Snow Level in the Washington Cascades  

Science Conference Proceedings (OSTI)

This paper describes the mesoscale distribution of temperature and snow level in the Washington Cascades. During the winter months, when the Cascades separate relatively cold continental air to the east from warmer marine air to the west, ...

W. James Steenburgh; Clifford F. Mass; Sue A. Ferguson

1997-06-01T23:59:59.000Z

245

Ocean forecasting in terrain-following coordinates: Formulation and skill assessment of the Regional Ocean Modeling System  

Science Conference Proceedings (OSTI)

Systematic improvements in algorithmic design of regional ocean circulation models have led to significant enhancement in simulation ability across a wide range of space/time scales and marine system types. As an example, we briefly review the Regional ... Keywords: Biogeochemical cycles, Incompressible Navier-Stokes equations, Regional ocean prediction, Sea ice modeling, Split-explicit time stepping

D. B. Haidvogel; H. Arango; W. P. Budgell; B. D. Cornuelle; E. Curchitser; E. Di Lorenzo; K. Fennel; W. R. Geyer; A. J. Hermann; L. Lanerolle; J. Levin; J. C. McWilliams; A. J. Miller; A. M. Moore; T. M. Powell; A. F. Shchepetkin; C. R. Sherwood; R. P. Signell; J. C. Warner; J. Wilkin

2008-03-01T23:59:59.000Z

246

Using an implicit min/max KD-tree for doing efficient terrain line of sight calculations  

Science Conference Proceedings (OSTI)

The generation of accurate Line of Sight (LOS) visibility information consumes significant resources in large scale synthetic environments such as many-on-many serious games and battlefield simulators. Due to the importance of optimum utilisation of ... Keywords: implicit kd-tree, line of sight, spherical earth

Bernardt Duvenhage

2009-02-01T23:59:59.000Z

247

The Sensitivity of Precipitation and Snowpack Simulations to Model Resolution via Nesting in Regions of Complex Terrain  

Science Conference Proceedings (OSTI)

This paper examines the sensitivity of regional climate simulations to increasing spatial resolution via nesting by means of a 20-yr simulation of the western United States at 40-km resolution and a 5-yr simulation at 13-km resolution for the ...

L. Ruby Leung; Yun Qian

2003-12-01T23:59:59.000Z

248

The Influence of Terrain on the Severe Weather Distribution across Interior Eastern New York and Western New England  

Science Conference Proceedings (OSTI)

Forecasters have surmised that prominent mountain ranges and river valleys in eastern New York and western New England (e.g., Hudson and Mohawk River valleys; Adirondack, Catskill, Green, and Berkshire Mountains) affect convective initiation and ...

Alicia C. Wasula; Lance F. Bosart; Kenneth D. LaPenta

2002-12-01T23:59:59.000Z

249

Conoco's new approach to drill site construction in difficult, remote, swamp and jungle terrain Irian Jaya, Indonesia  

SciTech Connect

In October 1982, Conoco Irian Jaya as operator: and partners: Pertamina, Inpex Bintuni Limited, and Moeco Irian Jaya Company, mobilized construction equipment from Singapore to the KBS ''A'' contract area in Irian Jaya, Indonesia for the purpose of constructing a base camp and drill three exploratory sites. What made this construction effort different from others previously used in Irian Jaya; was that it incorporated several new and unique features, namely: a turnkey approach to construction; that is Conoco providing complete set of specifications and conditions with contractor assuming risks for a lump sum payment; special equipment designed by contractor for Irian Jaya operations; an incentive to co pensate or penalize contractor for helicopter hours flown below or above a predetermined number; structural steel pile platform designs for two swamp locations (Ayot and Aum), as opposed to the more conventional corduroy timber log-plank arrangement; and drilling rig pads designed for specific heli-rig with limited extra space. All work was successfully completed within the time frame stipulated in the contract, that is five months from the time the contractor was notified to begin mobilization of equipment, materials and personnel.

Roodriguez, F.H.

1984-02-01T23:59:59.000Z

250

An Intense, Quasi-Steady Thunderstorm over Mountainous Terrain. Part I: Evolution of the Storm-Initiating Mesoscale Circulation  

Science Conference Proceedings (OSTI)

A detailed, multisensor case study of mesoscale convective storms occurring in summer over the central and eastern Colorado Rockies is presented. This case study uses data obtained during the 1977 South Park Area Cumulus Experiment (SPACE) from ...

W. R. Cotton; R. L. George; K. R. Knupp

1982-02-01T23:59:59.000Z

251

Intermediate or Senior Surficial Geologist or Terrain Scientist Our Environmental Services group is dedicated to managing environmental issues  

E-Print Network (OSTI)

, Tau Beta Pi, Sigma Xi, and AAAS. Combined Discussion" 2 H. W. Dommel (University of British Columbia, Vancouver, Canada) and J. E. Drakos, P. S. Wong, R. M. Shier, and J. H. Sawada (British Columbia Hydro METHOD FOR BURIED PIPELINE VOLTAGES DUE TO 60 Hz AC INDUCTIVE COUPLING PART I - ANALYSIS Allen Taflove

Montréal, Université de

252

Comparisons between Mesoscale Model Terrain Sensitivity Studies and Doppler Lidar Measurements of the Sea Breeze at Monterey Bay  

Science Conference Proceedings (OSTI)

A NOAA/Environmental Technology Laboratory Doppler lidar measured the life cycle of the land- and sea-breeze system at Monterey Bay, California, in 1987, during the Land–Sea Breeze Experiment (LASBEX). On days with offshore synoptic flow, the ...

Lisa S. Darby; Robert M. Banta; Roger A. Pielke Sr.

2002-12-01T23:59:59.000Z

253

Performance of Hot Plate for measuring Solid Precipitation in Complex Terrain during the 2010 Vancouver Winter Olympics  

Science Conference Proceedings (OSTI)

Solid precipitation intensity, snow density, wind speed, and temperature were collected from November 2009 to February 2010 at a naturally sheltered station located at an altitude of 1640 m ASL on Whistler Mountain in British Colombia, Canada. The ...

Faisal S. Boudala; Roy Rasmussen; George A. Isaac; Bill Scott

254

R E F E R E E D P A P E R Interactive Local Terrain Deformation Inspired by  

E-Print Network (OSTI)

into height maps using shader programs running on graphics hardware. The height field is edited indirectly. To further improve performance, we use a graphics processing unit implementation where a vertex shader computes the deformed positions of the model to be displayed. The vertex shader is a processing function

Kurapov, Alexander

255

An Overview of MADONA: A Multinational Field Study of High-Resolution Meteorology and Diffusion over Complex Terrain  

Science Conference Proceedings (OSTI)

The multination, high-resolution field study of Meteorology And Diffusion Over Non-Uniform Areas (MADONA) was conducted by scientists from the United States, the United Kingdom, Germany, Denmark, Sweden, and the Netherlands at Porton Down, ...

R. M. Cionco; J. H. Byers; Waufm Kampe; H. van Raden; H. Weber; C. Biltoft; C. G. Collins; T. J. Higgs; C. D. Jones; D. J. Ride; R. Robson; A. R. T. Hin; P-E. Johansson; K. Nyrén; H. E. Jørgensen; T. Mikkelsen; J. M. Santabarbara; S. Thykier-Nielsen; J. F. Kimber; J. Streicher

1999-01-01T23:59:59.000Z

256

Isolating Effects of Water Table Dynamics, Terrain, and Soil Moisture Heterogeneity on the Atmospheric Boundary Layer Using Coupled Models  

E-Print Network (OSTI)

D8): Yeh PJ and Eltahir EAB, “Representation of Water TableYeh and Eltahir, 2005; Fan et al, 2007). Additionally, waterYeh and Eltahir (2005) addressed errors in predicted land surface fluxes especially for shallow water

Rihani, Jehan

2010-01-01T23:59:59.000Z

257

Final Technical Report: Development of the DUSTRAN GIS-Based Complex Terrain Model for Atmospheric Dust Dispersion  

SciTech Connect

Activities at U.S. Department of Defense (DoD) training and testing ranges can be sources of dust in local and regional airsheds governed by air-quality regulations. The U.S. Department of Energy’s Pacific Northwest National Laboratory just completed a multi-year project to develop a fully tested and documented atmospheric dispersion modeling system (DUST TRANsport or DUSTRAN) to assist the DoD in addressing particulate air-quality issues at military training and testing ranges.

Allwine, K Jerry; Rutz, Frederick C.; Shaw, William J.; Rishel, Jeremy P.; Fritz, Brad G.; Chapman, Elaine G.; Hoopes, Bonnie L.; Seiple, Timothy E.

2007-05-01T23:59:59.000Z

258

Categorization of Nocturnal Drainage Flows within the Brush Creek Valley and the Variability of Sigma Theta in Complex Terrain  

Science Conference Proceedings (OSTI)

The monthly frequencies of nocturnal drainage flows in the Brush Creek Valley were estimated over the period August 1982–January 1985 for the purpose of evaluating the representativeness of the drainage flows observed during a few intensive study ...

Paul H. Gudiksen

1989-06-01T23:59:59.000Z

259

Dispersion in Complex Terrain: A Summary of the AMS Workshop held in Keystone, Colorado, 17–20 May 1983  

Science Conference Proceedings (OSTI)

This article summarizes a workshop convened under the direction of the AMS Steering Committee for the EPA (Environmental Protection Agency) Cooperative Agreement on Air Quality Modeling. The purpose of the workshop was to address the status of ...

Bruce A. Egan; Francis A. Schiermeier

1986-10-01T23:59:59.000Z

260

Etude pétrologique, géochimique et structurale des terrains cristallins de Belledonne entre l'Arc et l'Isère (Alpes françaises).  

E-Print Network (OSTI)

??La chaine de Belledonne est l'un des massifs cristallins,comme le Mont Blanc, l'Aar-Gothard au Nord-Est, les grandes Rousses , les Ecrins-Pelvoux, l'Argentera-Mercantour au Sud-Est. Ces… (more)

Simeon, Yves

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

The Development of a Prototype Coupled Analysis and Nowcasting Knowledge-based System for Complex-Terrain Interaction Studies  

Science Conference Proceedings (OSTI)

An experimental weather classification, analysis, and nowcasting system, based upon a combination of artificial intelligence techniques and conventional numerical modeling, and designed for use as a real-time range/field forecasting aid, is ...

Montie M. Orgill; John D. Kincheloe; Robert A. Sutherland

1992-06-01T23:59:59.000Z

262

Immersed Boundary Methods for High-Resolution Simulation of Atmospheric Boundary-Layer Flow Over Complex Terrain  

E-Print Network (OSTI)

mesoscale simulations for wind energy applications, in Fallin Proceedings of the American Wind Energy Association WindWorkshop, American Wind Energy Association, Washington, DC,

Lundquist, Katherine Ann

2010-01-01T23:59:59.000Z

263

Use of Mass Conservation and Critical Dividing Streamline concepts for Efficient Objective Analysis of Winds in Complex Terrain  

Science Conference Proceedings (OSTI)

Observed winds and temperature profiles can be used to generate three-dimensional, mass-conserving wind fields that reflect topographical influences. The concept of critical dividing streamlines is used to define quasi-horizontal, flow-confining ...

F. L. Ludwig; J. M. Livingston; R. M. Endlich

1991-11-01T23:59:59.000Z

264

Horizontal Heat Fluxes over Complex Terrain Computed Using a Simple Mixed-Layer Model and a Numerical Model  

Science Conference Proceedings (OSTI)

The thermally induced local circulation over a periodic valley is simulated by a two-dimensional numerical model that does not include condensational processes. During the daytime of a clear, calm day, heat is transported from the mountainous ...

Fujio Kimura; Tuneo Kuwagata

1995-02-01T23:59:59.000Z

265

Mapping the Terrain: Language Testing and Placement for US-Educated Language Minority Students in California's Community Colleges [EXECUTIVE SUMMARY  

E-Print Network (OSTI)

college students. Sacramento, CA: Legislative Analyst'shigher education. Sacramento, CA: ICAS. Retrieved fromStudent fee handbook. Sacramento, CA: California Community

Bunch, George; Endris, Ann; Panayotova, Dora; Romero, Michelle; Llosa, Lorena

2011-01-01T23:59:59.000Z

266

Biocorrosive Thermophilic Microbial Communities in Alaskan North Slope Oil Facilities  

E-Print Network (OSTI)

in Alaskan North Slope Oil Facilities Kathleen E. Duncan,in Alaskan North Slope oil production facilities. Title:in Alaskan North Slope Oil Facilities Authors: Kathleen E.

Duncan, Kathleen E.

2010-01-01T23:59:59.000Z

267

The Turbulence Structure of Nocturnal Slope Flow  

Science Conference Proceedings (OSTI)

Measurements of the turbulence structure of nocturnal slope flow are used to test the hypothesis that slope flow turbulence in the region above the low-level wind maximum is decoupled from the surface and has a local structure similar to that ...

T. W. Horst; J. C. Doran

1988-02-01T23:59:59.000Z

268

Unsteady Thermally Driven Flows on Gentle Slopes  

Science Conference Proceedings (OSTI)

The theoretical and laboratory studies on mean velocity and temperature fields of an unsteady atmospheric boundary layer on sloping surfaces reported here were motivated by recent field observations on thermally driven circulation in very wide ...

J. C. R. Hunt; H. J. S. Fernando; M. Princevac

2003-09-01T23:59:59.000Z

269

Instabilities of Gravity Currents along a Slope  

Science Conference Proceedings (OSTI)

This work examines the linear stability of rotationally influenced density currents with zero potential vorticity flowing over a sloping seafloor at the base of an ocean of finite depth. This configuration serves as a crude model of a type of ...

S. P. Meacham; J. C. Stephens

2001-01-01T23:59:59.000Z

270

ALASKA NORTH SLOPE OIL AND GAS RESOURCES  

NLE Websites -- All DOE Office Websites (Extended Search)

Task 222.01.01 Alaska North Slope Oil and Gas A Promising Future or an Area in Decline? DOENETL-20071279 Full Report August 2007 Disclaimer This report was prepared as an account...

271

Slope Control in Western Boundary Currents  

Science Conference Proceedings (OSTI)

An analytic solution is presented for the steady-state depth-averaged western boundary current flowing over the continental slope by combining three highly idealized models: the Stommel model, the Munk model, and the arrested topographic wave ...

Sang-Ki Lee; J. L. Pelegrí; John Kroll

2001-11-01T23:59:59.000Z

272

Continental Slope Flow Northeast of Taiwan  

Science Conference Proceedings (OSTI)

Hydrographic observations and current measurements with a Shipboard Acoustic Doppler Current Profiler over the continental shelf–slope junction northeast of Taiwan during 10–17 August 1994 allow the construction of the mesoscale flow pattern ...

T. Y. Tang; Y. Hsueh; Y. J. Yang; J. C. Ma

1999-06-01T23:59:59.000Z

273

North Slope export ban in repealed  

Science Conference Proceedings (OSTI)

The U.S. Senate and House both approve a bill lifting the 20-year-old ban on exports from the North Slope. The importance of this action is described.

NONE

1995-08-01T23:59:59.000Z

274

March 13, 1968: Oil discovered on Alaska's North Slope | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

13, 1968: Oil discovered on Alaska's North Slope March 13, 1968: Oil discovered on Alaska's North Slope March 13, 1968: Oil discovered on Alaska's North Slope March 13, 1968 The...

275

Slope exploration slow but hopes remain high  

SciTech Connect

Alaska North Slope exploratory drilling has been sparse this winter. Attention focused on a pair of ARCO alaska Inc. wildcats in the West Colville high sector west of Kuparuk River oil field and two BP Exploration (Alaska) Inc. wildcats in the Badami area at Mikkelson Bay. In both prospects, the drilling effort was to prove up more production that could support commercial development of the respective areas. Though there has been relatively little exploratory drilling this winter, both of the slope`s major producers have indicated they are far from finished with exploration in Alaska. The paper discusses the debate over the use of the Arctic National Wildlife Refuge, leasing and licensing, the federal leasing outlook, and Russian-US leasing.

NONE

1995-05-15T23:59:59.000Z

276

“Pycnobathic” Currents over the Upper Continental Slope  

Science Conference Proceedings (OSTI)

The dynamic interaction of a sloping seafloor with along-isobath density variation is calculated for cases involving a sharp pycnocline and a surface-to-bottom front. Pycnocline depth is supposed to vary in the alongshore direction only, over a ...

G. T. Csanady

1985-03-01T23:59:59.000Z

277

On the Interactions of Internal Waves Reflecting from Slopes  

Science Conference Proceedings (OSTI)

Incident internal waves and those reflected from a uniform slope interact at second order. These interactions are considered for incident waves traveling obliquely to the slope in a uniformly stratified rotating fluid. It is found that (i) ...

S. A. Thorpe

1997-09-01T23:59:59.000Z

278

Mining Deformation Features of Complex Engineering Slope via Safety Monitoring  

Science Conference Proceedings (OSTI)

A nonlinear regression model is presented in this article for mining deformation features of complex engineering slope on the basis of various monitoring data. It is aimed to discover the factors which have evident effect on slope deformation, as well ... Keywords: high steep slope, deformation mining, nonlinear regression, secular distortion, Jinping 1 hydropower station

Linwei Wang; Zaobao Liu; Dan Jin; Qingxiang Meng

2012-05-01T23:59:59.000Z

279

One-Level Diagnostic Modeling of Mesoscale Surface Winds in Complex Terrain. Part I: Comparison with Three-Dimensional Modeling in Israel  

Science Conference Proceedings (OSTI)

A one-level sigma-coordinate model originally developed by Danard and modified by Mass and Dempsey and Alpert et al., is applied to the study of surface flow over an averaged summer diurnal cycle in Israel. The detailed flow features are compared ...

P. Alpert; B. Getenio

1988-10-01T23:59:59.000Z

280

Patterns of Cloud-to-Ground Lightning and Convective Rainfall Associated with Postwildfire Flash Floods and Debris Flows in Complex Terrain of the Western United States  

Science Conference Proceedings (OSTI)

Flash flood and debris flow reports from Storm Data and the U.S. Geological Survey (USGS) are used to investigate the relationship between hazardous hydrological responses, convective rainfall, and cloud-to-ground (CG) lightning flash parameters. ...

S. Jeffrey Underwood; Michael D. Schultz

2004-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Integration of the Fully Elastic Equations Cast in the Hydrostatic Pressure Terrain-Following Coordinate in the Framework of the ARPEGE/Aladin NWP System  

Science Conference Proceedings (OSTI)

ARPEGE/Aladin is a limited-area 3D primitive equation model, which belongs to the integrated NWP ARPEGE/IFS system. Like its global counterpart, the limited-area version has a spectral representation of variables in the horizontal but uses double-...

Radmila Bubnová; Gwenaëlle Hello; Pierre Bénard; Jean-François Geleyn

1995-02-01T23:59:59.000Z

282

An Application of the Immersed Boundary Method for Recovering the Three-Dimensional Wind Fields over Complex Terrain Using Multiple-Doppler Radar Data  

Science Conference Proceedings (OSTI)

This study develops an extension of a variational-based multiple-Doppler radar synthesis method to construct the three-dimensional wind field over complex topography. The immersed boundary method (IBM) is implemented to take into account the ...

Yu-Chieng Liou; Shao-Fan Chang; Juanzhen Sun

2012-05-01T23:59:59.000Z

283

Evaluation of WRF-predicted near-hub-height winds and ramp events over a Pacific Northwest site with complex terrain  

Science Conference Proceedings (OSTI)

One challenge with wind power forecasts is the accurate prediction of rapid changes in wind speed (ramps). To evaluate the Weather Research and Forecasting (WRF) model’s ability to predict such events, model simulations, conducted over an area of ...

Qing Yang; Larry K. Berg; Mikhail Pekour; Jerome D. Fast; Rob K. Newsom; Mark Stoelinga; Catherine Finley

284

Soil moisture in complex terrain: quantifying effects on atmospheric boundary layer flow and providing improved surface boundary conditions for mesoscale models  

E-Print Network (OSTI)

sensible heat flux (W/m 2 ) on 350 m grid for (a) weaksensible heat flux (W/m 2 ) on 350 m grid for (a) weakgrids to some extent through the advection and mixing terms of the heat

Daniels, Megan Hanako

2010-01-01T23:59:59.000Z

285

Impacts of Post-Dam Land-use/Land-Cover Changes on Modification of Extreme Precipitation in Contrasting Hydro-climate and Terrain Features  

Science Conference Proceedings (OSTI)

Understanding the impact of post-dam climate feedbacks, due to land-use/land-cover (LULC)variability, on modification of extreme precipitation (EP) remains a challenge for a 21st century approach to dam design and operation. In this study, we used ...

Abel T. Woldemichael; Faisal Hossain; Roger Pielke Sr.

286

Estimation of daily actual evapotranspiration from remotely sensed data under complex terrain over the upper Chao river basin in North China  

Science Conference Proceedings (OSTI)

Daily actual evapotranspiration over the upper Chao river basin in North China on 23 June 2005 was estimated based on the Surface Energy Balance Algorithm for Land (SEBAL), in which the parameterization schemes for calculating the instantaneous solar ...

Yanchun Gao; Di Long; Zhao-Liang Li

2008-06-01T23:59:59.000Z

287

The Effect of Topographic Variability on Initial Condition Sensitivity of Low-Level Wind Forecasts. Part I: Experiments Using Idealized Terrain  

Science Conference Proceedings (OSTI)

The concept of improving the accuracy of numerical weather forecasts by targeting additional meteorological observations in areas where the initial condition error is suspected to grow rapidly has been the topic of numerous studies and field ...

Paul E. Bieringer; Peter S. Ray; Andrew J. Annunzio

2013-07-01T23:59:59.000Z

288

Evaluation of WRF-Predicted Near-Hub-Height Winds and Ramp Events over a Pacific Northwest Site with Complex Terrain  

Science Conference Proceedings (OSTI)

One challenge with wind-power forecasts is the accurate prediction of rapid changes in wind speed (ramps). To evaluate the Weather Research and Forecasting (WRF) model's ability to predict such events, model simulations, conducted over an area of ...

Qing Yang; Larry K. Berg; Mikhail Pekour; Jerome D. Fast; Rob K. Newsom; Mark Stoelinga; Catherine Finley

2013-08-01T23:59:59.000Z

289

Analysis of wind shear models and trends in different terrains M.L. Ray *, A.L. Rogers, and J.G. McGowan  

E-Print Network (OSTI)

by the Energy & Environment Research Center at the University of North Dakota [1]. Each site has wind speed data.F., J.G. McGowan, and A.L. Rogers. Wind Energy Explained: Theory, Design and Application. John Wiley." Proceedings of British Wind Energy Association Workshop on the Influence of Trees on Wind Farm Energy Yields

Massachusetts at Amherst, University of

290

Mesoscale Atmospheric Modeling Using a High Horizontal Grid Resolution over a Complex Coastal Terrain and a Wine Region of South Africa  

Science Conference Proceedings (OSTI)

The Regional Atmospheric Modeling System (RAMS) was used to assess local air circulation patterns over the wine-producing Stellenbosch region of South Africa. Numerical simulations using four nested grids (25, 5, and 1 km, and 200 m of horizontal ...

V. Bonnardot; S. Cautenet

2009-02-01T23:59:59.000Z

291

Toward Development of Improved QPE in Complex Terrain Using Cloud-to-Ground Lightning Data: A Case Study for the 2005 Monsoon in Southern Arizona  

Science Conference Proceedings (OSTI)

The relationship between convective precipitation and cloud-to-ground (CG) lightning is examined over a study area in southwest Arizona and northwest Mexico. Using seasonal-to-daily and hourly time resolution, the National Climatic Data Center (...

Carlos Manuel Minjarez-Sosa; Christopher L. Castro; Kenneth L. Cummins; E. Philip Krider; Julio Waissmann

2012-12-01T23:59:59.000Z

292

ALASKA NORTH SLOPE OIL AND GAS RESOURCES  

NLE Websites -- All DOE Office Websites (Extended Search)

FFf Task 222.01.01 FFf Task 222.01.01 ADDENDUM REPORT Alaska North Slope Oil and Gas A Promising Future or an Area in Decline? DOE/NETL-2009/1385 April 2009 ii Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product or process disclosed, or represents that its use would not infringe probably owned rights. References herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement,

293

North Slope action holds West Coast spotlight  

Science Conference Proceedings (OSTI)

The first oil from a North Slope reservoir outside Prudhoe Bay will begin flowing next year at rate of 80,000 bpd from Kuparuk field now under development by Atlantic Richfield Co. west of Prudhoe Bay. Just north of the Kuparuk development, Conoco Inc. has found a commercial reservoir in the Milne Point unit and will be drilling confirmation and delineation wells later this year and in 1982. Another area which very likely will be developed for production is located northeast of Prudhoe Bay, where Sohio Alaska Petroleum Co. has announced discoveries in 2 Sag Delta wells. In California's San Joaquin Valley, 3 Kern County fields - South Belridge, Elk Hills, and Lost Hills - are the sites of intensive drilling. Seven rigs are working in the Santa Barbara Channel, 3 of them developing known fields from permanent platforms.

Wilson, H.M.

1981-05-25T23:59:59.000Z

294

Development of a New Generation of Optical Slope Measuring Profiler  

Science Conference Proceedings (OSTI)

A collaboration including all DOE synchrotron laboratories and industrial vendors of X-ray optics, and with active participation of the HBZ-BESSY-II optics group, has been established to work together on a new slope measuring profiler - the Optical Slope Measuring System (OSMS). The slope measurement accuracy of the instrument is expected to be ALS (March 26, 2010) and at the APS (May 6, 2010).

Yashchuk, V.V.; Takacs, P.; McKinney, W.R.; Assoufid, L.; Siewert, F.; Zeschke, T.

2011-10-26T23:59:59.000Z

295

North Slope of Alaska ARM Climate Research Facility  

NLE Websites -- All DOE Office Websites (Extended Search)

3 Emergency Response Plan June 2010 Atmospheric Radiation Measurement Climate Research Facility North Slope of AlaskaAdjacent Arctic Ocean Emergency Response Plan Purpose The...

296

Numerical Simulation of Katabatic Flow with Changing Slope Angle  

Science Conference Proceedings (OSTI)

A large eddy simulation (LES) model and the Advanced Regional Prediction System (ARPS) model, which does not resolve turbulent eddies, are used to study the effect of a slope angle decrease on the structure of katabatic slope flows. For a simple, ...

Craig M. Smith; Eric D. Skyllingstad

2005-11-01T23:59:59.000Z

297

Analysis on Uranic Slope Stability Based on Neural Network  

Science Conference Proceedings (OSTI)

How to accurately predict the occurrence of landslides, and it has become one of the troubles in the mining process. The author made a brief introduction of artificial neural network and BP network model in this paper, and also analysis some important ... Keywords: Uranic slope, neural network, Forecast network model, safety of slope

Yufeng Zhu; Xiaoli Ding; Zhiwei Li; Shijian Zhou

2010-07-01T23:59:59.000Z

298

Project Aids Development of Legacy Oilfield on Alaska's North Slope |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Project Aids Development of Legacy Oilfield on Alaska's North Project Aids Development of Legacy Oilfield on Alaska's North Slope Project Aids Development of Legacy Oilfield on Alaska's North Slope October 18, 2013 - 11:52am Addthis Project Aids Development of Legacy Oilfield on Alaska’s North Slope Quick Facts The National Petroleum Reserve was created by President Warren G, Harding in 1923 when the U.S. Navy was converting from coal to oil. The reserve spans 22 million acres across the western North Slope of Alaska-the largest single unit of public lands in the nation. The 800-mile-long trans-Alaska pipeline carries oil from Prudhoe Bay, on Alaska's North Slope, to Valdez, Alaska, the nearest ice-free port. More than 16 million barrels of oil have traveled through the pipeline since the first barrel flowed in 1977.

299

Project Aids Development of Legacy Oilfield on Alaska's North Slope |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Project Aids Development of Legacy Oilfield on Alaska's North Project Aids Development of Legacy Oilfield on Alaska's North Slope Project Aids Development of Legacy Oilfield on Alaska's North Slope October 18, 2013 - 11:52am Addthis Project Aids Development of Legacy Oilfield on Alaska’s North Slope Quick Facts The National Petroleum Reserve was created by President Warren G, Harding in 1923 when the U.S. Navy was converting from coal to oil. The reserve spans 22 million acres across the western North Slope of Alaska-the largest single unit of public lands in the nation. The 800-mile-long trans-Alaska pipeline carries oil from Prudhoe Bay, on Alaska's North Slope, to Valdez, Alaska, the nearest ice-free port. More than 16 million barrels of oil have traveled through the pipeline since the first barrel flowed in 1977.

300

A Method for Improved Representation of Dense Water Spreading over Topography in Geopotential-Coordinate Models  

Science Conference Proceedings (OSTI)

A new technique for incorporating processes of near-bottom tracer transport over sloping topography in geopotential-coordinate ocean circulation models is presented. It is based on a “hybrid” approach, coupling a simple terrain-following bottom ...

A. Beckmann; R. Döscher

1997-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Analysis of Gravity Waves Generated at the Top of a Drainage Flow  

Science Conference Proceedings (OSTI)

Drainage or katabatic flows are common mesoscale circulations established as a result of differential radiative cooling of near-surface air masses in sloping terrain. The initial irruption of these flows, with sudden shifts in wind speed and ...

Samuel Viana; Enric Terradellas; Carlos Yagüe

2010-12-01T23:59:59.000Z

302

A Numerical Simulation of Dryline Sensitivity to Soil Moisture  

Science Conference Proceedings (OSTI)

Previous studies have explained dryline movement to be a result of vertical turbulent mixing. Such mixing was shown to efficiently erode the western edge of the shallow moist layer above sloping terrain.

Lewis D. Grasso

2000-08-01T23:59:59.000Z

303

Example of Reduced Turbulence during Thunderstorm Outflow  

Science Conference Proceedings (OSTI)

The vertical structures of turbulence, winds, and temperatures are analyzed from a 92-m instrumented tower and a collocated acoustic sodar during an outflow episode from a weak thunderstorm over sloping terrain in northern New Mexico. Prior to ...

Brent M. Bowen

1996-06-01T23:59:59.000Z

304

A New Look at the Physics of Rossby Waves: A Mechanical–Coriolis Oscillation  

Science Conference Proceedings (OSTI)

The presence of the latitudinal variation of the Coriolis parameter serves as a mechanical barrier that causes a mass convergence for the poleward geostrophic flow and divergence for the equatorward flow, just as a sloped bottom terrain does to a ...

Ming Cai; Bohua Huang

2013-01-01T23:59:59.000Z

305

Production, development outlook bright on Alaska North Slope  

SciTech Connect

Alaskan North Slope operators continue to press efforts to bolster oil flow from currently producing fields in the province, notably giants Prudhoe Bay and Kuparuk River. This is occurring against a backdrop of an improving political climate at the federal and state levels for the future of North Slope production. North Slope operators also have programs aimed at developing marginal fields and sustaining exploration. The paper discusses Prudhoe Bay developments, efforts to improve oil recovery, the Kuparuk River field, ARCO gas prospects, changing politics, and royalty changes.

NONE

1995-06-26T23:59:59.000Z

306

Development of a new generation of optical slope measuring profiler  

SciTech Connect

We overview the results of a broad US collaboration, including all DOE synchrotron labs (ALS, APS, BNL, NSLS-II, LLNL, LCLS), major industrial vendors of x-ray optics (InSync, Inc., SSG Precision Optronics-Tinsley, Inc., Optimax Systems, Inc.), and with active participation of HBZ-BESSY-II optics group, on development of a new generation slope measuring profiler -- the optical slope measuring system (OSMS). The desired surface slope measurement accuracy of the instrument is<50 nrad (absolute) that is adequate to the current and foreseeable future needs for metrology of x-ray optics for the next generation of light sources.

Yashchuk, Valeriy V.; Takacs, Peter Z.; McKinney, Wayne R.; Assoufid, Lahsen

2010-07-09T23:59:59.000Z

307

Newly Installed Alaska North Slope Well Will Test Innovative Hydrate  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Newly Installed Alaska North Slope Well Will Test Innovative Newly Installed Alaska North Slope Well Will Test Innovative Hydrate Production Technologies Newly Installed Alaska North Slope Well Will Test Innovative Hydrate Production Technologies May 17, 2011 - 1:00pm Addthis Washington, DC - A fully instrumented well that will test innovative technologies for producing methane gas from hydrate deposits has been safely installed on the North Slope of Alaska. As a result, the "Iġnik Sikumi" (Iñupiaq for "fire in the ice") gas hydrate field trial well will be available for field experiments as early as winter 2011-12. The well, the result of a partnership between ConocoPhillips and the Office of Fossil Energy's (FE) National Energy Technology Laboratory, will test a technology that involves injecting carbon dioxide (CO2) into sandstone

308

Katabatic Flow Mechanisms on a Low-Angle Slope  

Science Conference Proceedings (OSTI)

Momentum and heat budget equations for katabatic flows on sloping surfaces are revisited. Terms in these equations are evaluated using wind and potential temperature data from four tethered-balloon data collection systems on a 3-km line running ...

Thomas Haiden; C. David Whiteman

2005-01-01T23:59:59.000Z

309

Alaska North Slope Crude Oil Production (Thousand Barrels per Day)  

U.S. Energy Information Administration (EIA)

Alaska North Slope Crude Oil Production (Thousand Barrels per Day) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9; 1980's: 1,524: 1,621 ...

310

NETL: Oil & Natural Gas Projects: Alaska North Slope Oil and...  

NLE Websites -- All DOE Office Websites (Extended Search)

Alaska North Slope Oil and Gas Transportation Support System Last Reviewed 6172013 DE-FE0001240 Goal The primary objectives of this project are to develop analysis and management...

311

Observations of Boundary Mixing over the Continental Slope  

Science Conference Proceedings (OSTI)

Observations of mixing over the continental slope using a towed body reveal a great lateral extent (several kilometers) of continuously turbulent fluid within a few hundred meters of the boundary at depth 1600 m. The largest turbulent dissipation ...

J. N. Moum; D. R. Caldwell; J. D. Nash; G. D. Gunderson

2002-07-01T23:59:59.000Z

312

Alaska North Slope Crude Oil Production (Thousand Barrels)  

U.S. Energy Information Administration (EIA)

Alaska North Slope Crude Oil Production (Thousand Barrels) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9; 1980's: 556,265: 591,506 ...

313

Satellite Evidence of Enhanced Upwelling Along the European Continental Slope  

Science Conference Proceedings (OSTI)

TIROS-N AVHRR imagery is used to describe a persistent but localized band of upwelling which follows the contours of the European continental slope from the Porcupine Seabight (southwest of Ireland) to the Bay of Biscay. Its persistent occurrence,...

Robert R. Dickson; Paul A. Gurbutt; V. Narayana Pillai

1980-05-01T23:59:59.000Z

314

Newly Installed Alaska North Slope Well Will Test Innovative...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

the North Slope of Alaska. As a result, the "Inik Sikumi" (Iupiaq for "fire in the ice") gas hydrate field trial well will be available for field experiments as early as...

315

Heat Transfer in Projecting and Sloped Fenestration Products  

NLE Websites -- All DOE Office Websites (Extended Search)

Heat Transfer in Projecting and Sloped Fenestration Products Speaker(s): Dragan Charlie Curcija Date: May 26, 2010 - 12:00pm Location: 90-3122 The heat transfer performance of...

316

Hadronic cross sections, elastic slope and physical bounds  

Science Conference Proceedings (OSTI)

An almost model-independent parametrization for the ratio of the total hadronic cross section to elastic slope is discussed. Its applicability in studies of asymptotia and analyses of extensive air shower in cosmic-ray physics is also outlined.

Fagundes, D. A.; Menon, M. J. [Instituto de Fisica Gleb Wataghin, Universidade Estadual de Campinas, UNICAMP, 13083-859 Campinas SP (Brazil)

2013-03-25T23:59:59.000Z

317

Slope-Enhanced Fission of Salty Hetons under Sea Ice  

Science Conference Proceedings (OSTI)

Ocean responses to a single brine source under ice and over a sloping bottom are investigated in numerical experiments. Brine sources considered herein are often much stronger than that anticipated from a single seawater freezing event in a time ...

Shenn-Yu Chao; Ping-Tung Shaw

2000-11-01T23:59:59.000Z

318

Modulation of erosion on steep granitic slopes by boulder armoring, as revealed by cosmogenic 26  

E-Print Network (OSTI)

Modulation of erosion on steep granitic slopes by boulder armoring, as revealed by cosmogenic 26 Al. In contrast, steep slopes lacking a boulder lag erode much more quickly than gentle slopes. Boulder armoring

Kirchner, James W.

319

Boundary Layer under Near-Inertial Internal Waves over a Critically Sloping Bottom  

Science Conference Proceedings (OSTI)

Internal waves reflecting off sloping bottoms have been shown to have boundary-layer scales proportional to ?½ (? is viscosity). As the characteristic slope of the wave approaches the slope of the bottom, the boundary-layer scale increases ...

R. Lee Gordon

1980-07-01T23:59:59.000Z

320

Slope Error Measurement Tool for Solar Parabolic Trough Collectors: Preprint  

DOE Green Energy (OSTI)

The National Renewable Energy Laboratory (NREL) has developed an optical measurement tool for parabolic solar collectors that measures the combined errors due to absorber misalignment and reflector slope error. The combined absorber alignment and reflector slope errors are measured using a digital camera to photograph the reflected image of the absorber in the collector. Previous work using the image of the reflection of the absorber finds the reflector slope errors from the reflection of the absorber and an independent measurement of the absorber location. The accuracy of the reflector slope error measurement is thus dependent on the accuracy of the absorber location measurement. By measuring the combined reflector-absorber errors, the uncertainty in the absorber location measurement is eliminated. The related performance merit, the intercept factor, depends on the combined effects of the absorber alignment and reflector slope errors. Measuring the combined effect provides a simpler measurement and a more accurate input to the intercept factor estimate. The minimal equipment and setup required for this measurement technique make it ideal for field measurements.

Stynes, J. K.; Ihas, B.

2012-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Breaking Criterion and Characteristics for Solitary Waves on Slopes  

E-Print Network (OSTI)

Shoaling and breaking of solitary waves is computed on slopes 1:100 to 1:8 using an experimentally validated fully nonlinear wave model based on potential flow equations. Characteristics of waves are computed at and beyond the breaking point, and geometric self-similarities of breakers are discussed as a function of wave height and bottom slope. No wave breaks for slopes steeper than 12 . A breaking criterion is derived for milder slopes, based on values of a nondimensional slope parameter o . This criterion predicts both whether waves will break or not and which type of breaking will occur (spilling, plunging, or surging). Empirical expressions for the breaking index and for the depth and celerity at breaking are derived based on computations. All results agree well with laboratory experiments. The NSW equations fail to predict these results with sufficient accuracy at the breaking point. Pre-breaking shoaling rates follow a more complex path than previously realized. Post-breaking behaviors exhibit a rapid (non-dissipative) decay, also observed in experiments, associated with a transfer of potential energy into kinetic energy. Wave celerity decreases in this zone of rapid decay.

S. T. Grilli; I.A. Svendsen; Member Asce; Member Asce; R. Subramanya

1997-01-01T23:59:59.000Z

322

North Slope Borough Power & Light | Open Energy Information  

Open Energy Info (EERE)

Slope Borough Power & Light Slope Borough Power & Light Jump to: navigation, search Name North Slope Borough Power & Light Place Alaska Utility Id 26616 Utility Location Yes Ownership M NERC Location AK Operates Generating Plant Yes Activity Generation Yes Activity Distribution Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png Aged or Handicapped(seniors over 60) Residential Aged or Handicapped(seniors over 60) for Nuiqsut only Residential Commercial(Including Heat Trace) Commercial Commercial(Including Heat Trace) for Nuiqsut Commercial Residential Residential Residential (For Nuiqsut) Residential

323

The 2004 North Slope of Alaska Arctic Winter Radiometric Experiment  

NLE Websites -- All DOE Office Websites (Extended Search)

2004 North Slope of Alaska 2004 North Slope of Alaska Arctic Winter Radiometric Experiment E. R. Westwater, M. A. Klein, and V. Leuski Cooperative Institute for Research in Environmental Sciences University of Colorado National Oceanic and Atmospheric Administration Environmental Technology Laboratory Boulder, Colorado A. J. Gasiewski, T. Uttal, and D. A. Hazen National Oceanic and Atmospheric Administration Environmental Technology Laboratory Boulder, Colorado D. Cimini Remote Sensing Division, CETEMPS Universita' dell'Aquila L'Aquila, Italy V. Mattioli Dipartimento di Ingegneria Elettronica e dell'Informazione Perugia, Italy B. L. Weber and S. Dowlatshahi Science Technology Corporation Boulder, Colorado J. A. Shaw Department of Electrical and Computer Engineering

324

Interaction of a Warm Ring with the Western Slope in the Gulf of Mexico  

Science Conference Proceedings (OSTI)

Between November 1985 and May 1986, a warm ring encountered the western slope in the Gulf of Mexico, moved away from the slope, and began to dissipate. Before encountering the slope, the ring was quasi-circular. After encountering the slope, it ...

Fred M. Vukovich; Evans Waddell

1991-07-01T23:59:59.000Z

325

The Snowmass Points and Slopes: Benchmarks for SUSY Searches  

E-Print Network (OSTI)

The ``Snowmass Points and Slopes'' (SPS) are a set of benchmark points and parameter lines in the MSSM parameter space corresponding to different scenarios in the search for Supersymmetry at present and future experiments. This set of benchmarks was agreed upon at the 2001 ``Snowmass Workshop on the Future of Particle Physics'' as a consensus based on different existing proposals.

B. C. Allanach; M. Battaglia; G. A. Blair; M. Carena; A. De Roeck; A. Dedes; A. Djouadi; D. Gerdes; N. Ghodbane; J. Gunion; H. E. Haber; T. Han; S. Heinemeyer; J. L. Hewett; I. Hinchliffe; J. Kalinowski; H. E. Logan; S. P. Martin; H. -U. Martyn; K. T. Matchev; S. Moretti; F. Moortgat; G. Moortgat-Pick; S. Mrenna; U. Nauenberg; Y. Okada; K. A. Olive; W. Porod; M. Schmitt; S. Su; C. E. M. Wagner; G. Weiglein; J. Wells; G. W. Wilson; P. Zerwas

2002-02-25T23:59:59.000Z

326

Wind Stress from Wave Slopes Using Phillips Equilibrium Theory  

Science Conference Proceedings (OSTI)

An open ocean, deep water air–sea interaction experiment was conducted in the Gulf of Alaska. Wave amplitude and slope data were measured using a WAVEC heave, pitch, and roll buoy that was let drift in the Alaska gyre. Wind stress estimates were ...

Barbara-Ann Juszko; Richard F. Marsden; Sherman R. Waddell

1995-02-01T23:59:59.000Z

327

A Theoretical Study of Mountain Barrier Jets over Sloping Valleys  

Science Conference Proceedings (OSTI)

A shallow-water model is developed to examine the dynamics of mountain-barrier jets over a mesoscale sloping valley between two mountain ridges. In this model, the cold air trapped in the valley is represented by a shallow-water layer that is ...

Qin Xu; Ming Liu; Douglas L. Westphal

2000-05-01T23:59:59.000Z

328

Wind-Driven Motion near a Shelf-Slope Front  

Science Conference Proceedings (OSTI)

A two-dimensional, two-layered frontal system is used to examine the wind-driven motion near a shelf-slope front. In the linear regime, the along-frontal current is characterized by barotropic perturbations. The front is dynamically passive and ...

Hsien Wang Ou

1984-06-01T23:59:59.000Z

329

On the Pressure Field in the Slope Wind Layer  

Science Conference Proceedings (OSTI)

It has been suggested by some authors that the momentum equation for thermally driven slope flow should contain a horizontal pressure gradient term, in addition to the buoyancy term. It is shown that this suggestion is incorrect and leads to a ...

T. Haiden

2003-07-01T23:59:59.000Z

330

Settlement Prediction, Gas Modeling and Slope Stability Analysis  

E-Print Network (OSTI)

Settlement Prediction, Gas Modeling and Slope Stability Analysis in Coll Cardús Landfill Li Yu using mechanical models Simulation of gas generation, transport and extraction in MSW landfill 1 models Simulation of gas generation, transport and extraction in MSW landfill 1) Analytical solution

Politècnica de Catalunya, Universitat

331

Relationship between System Slope and Updraft Intensity in Squall Lines  

Science Conference Proceedings (OSTI)

In recent years there has been debate about whether squall lines have an “optimal state.” It has been repeatedly demonstrated that the slope of a squall line’s convective region is related to the comparative magnitudes of the squall line’s cold ...

Matthew D. Parker

2010-09-01T23:59:59.000Z

332

Accelerating Dense-Water Flow down a Slope  

Science Conference Proceedings (OSTI)

Where water is denser on a shallow shelf than in the adjacent deep ocean, it tends to flow down the slope from shelf to ocean. The flow can be in a steady bottom boundary layer for moderate combinations of upslope density gradient ??x? and bottom ...

John M. Huthnance

2009-06-01T23:59:59.000Z

333

Effects of Continental Slope on the Mean Shelf Circulation  

Science Conference Proceedings (OSTI)

Csanady's (1978) theory on the mean shelf circulation in a homogeneous ocean was re-examined by including effects of a continental slope. The results suggested that the mean southwestward flow on the Mid-Atlantic Blight is driven by an inflow ...

Dong-Ping Wang

1982-12-01T23:59:59.000Z

334

Wind-Forced Downwelling Slope Currents: A Numerical Study  

Science Conference Proceedings (OSTI)

A study is made of the dynamics of slope currents that arise from a steady, constant alongshore wind over a uniform shelf. Over the first 10–20 days, the evolution of the downwelled system on an f plane is qualitatively described by linear ...

John F. Middleton; Mauro Cirano

1999-08-01T23:59:59.000Z

335

Observations of Hurricane-Generated, Near-Inertial Slope Modes  

Science Conference Proceedings (OSTI)

Velocity Profiles and current meter measurements taken near Site D(39°10?N, 70°00?W) on the continental rise south of New England are used to study the variability of the near-inertial wave field along a sloping bottom. While the typical vertical ...

D. Y. Lai; T. B. Sanford

1986-04-01T23:59:59.000Z

336

Heat Transfer in Projecting and Sloped Fenestration Products  

NLE Websites -- All DOE Office Websites (Extended Search)

Heat Transfer in Projecting and Sloped Fenestration Products Heat Transfer in Projecting and Sloped Fenestration Products Speaker(s): Dragan Charlie Curcija Date: May 26, 2010 - 12:00pm Location: 90-3122 The heat transfer performance of fenestration products is routinely determined using computer simulations combined with physical testing. Initial efforts to develop simulation and test procedures for the fenestration products in the 1980's focused on simple planar windows since they are the dominant share of the market. However, once these procedures were developed (with resulting ISO standards and national rating and labeling requirements), manufacturers of more physically complex fenestration products (skylights, green house windows, tubular skylights) demanded procedures for simulating and testing their products. Dr Curcija

337

Case study of slope failures at Spilmans Island  

SciTech Connect

This paper presents a case study for a dredge disposal site called Spilmans Island, located along the Houston-Galveston Ship Channel, east of Houston. Initially classified as a sand bar in the San Jacinto River, Spilmans Island evolved in recent years with the construction of perimeter levees to contain the flow of materials produced from dredging operations. These levees were often constructed on soft dredged sediments, and as the levees were raised, occasionally slope failures occurred. The objectives of this paper are to illustrate the importance of reconstructing the history of a site as a basis for geotechnical analyses, and to demonstrate the significance of keeping accurate records of past investigations, construction activities, slope failures and subsequent remedial measures. The results of the geotechnical investigation described in this paper offer a clear example of how such data can be used to provide reliable predictions on the stability conditions of raised levees.

Kayyal, M.K. [Damascus Univ. (Syrian Arab Republic). Faculty of Civil Engineering; Hasen, M. [HVJ Association, Inc., Houston, TX (United States)

1998-11-01T23:59:59.000Z

338

DEVELOPMENT OF SHALLOW VISCOUS OIL RESERVES IN NORTH SLOPE  

SciTech Connect

North Slope of Alaska has huge oil deposits in heavy oil reservoirs such as Ugnu, West Sak and Shrader Bluff etc. The viscosity of the last two reservoir oils vary from {approx}30 cp to {approx}3000 cp and the amount in the range of 10-20 billion barrels. High oil viscosity and low formation strength impose problems to high recovery and well productivity. Water-alternate-gas injection processes can be effective for the lower viscosity end of these deposits in West Sak and Shrader Bluff. Several gas streams are available in the North Slope containing NGL and CO{sub 2} (a greenhouse gas). The goal of this research is to develop tools to find optimum solvent, injection schedule and well-architecture for a WAG process in North Slope shallow sand viscous oil reservoirs. In the last quarter, we added numerical solution along streamline subroutines to our streamline compositional simulator. The WAG injection algorithms are being developed. We studied the wettability of the reservoir oil and formulated a four-phase relative permeability model based on two-phase relative permeabilities. The effect of new relative permeability formulations on a five-spot pattern WAG recovery was evaluated. Effect of horizontal wells on pattern sweep has been initiated. A model quarter five-spot experiment is being designed. Plans for the next quarter includes modeling of WAG injection in streamline based simulation, evaluation of complex well-architecture and design of model quarter five-spot experiment.

Kishore K. Mohanty

2003-07-01T23:59:59.000Z

339

DEVELOPMENT OF SHALLOW VISCOUS OIL RESERVES IN NORTH SLOPE  

Science Conference Proceedings (OSTI)

North Slope of Alaska has huge oil deposits in heavy oil reservoirs such as Ugnu, West Sak and Shrader Bluff etc. The viscosity of the last two reservoir oils vary from {approx}30 cp to {approx}3000 cp and the amount in the range of 10-20 billion barrels. High oil viscosity and low formation strength impose problems to high recovery and well productivity. Water-alternate-gas injection processes can be effective for the lower viscosity end of these deposits in West Sak and Shrader Bluff. Several gas streams are available in the North Slope containing NGL and CO{sub 2} (a greenhouse gas). The goal of this research is to develop tools to find optimum solvent, injection schedule and well-architecture for a WAG process in North Slope shallow sand viscous oil reservoirs. In the last quarter, we have developed streamline generation and convection subroutines for miscible gas injection. The WAG injection algorithms are being developed. We formulated a four-phase relative permeability model based on two-phase relative permeabilities. The new relative permeability formulations are being incorporated into the simulator. Wettabilities and relative permeabilities are being measured. Plans for the next quarter includes modeling of WAG injection in streamline based simulation, relative permeability studies with cores, incorporation of complex well-architecture.

Kishore K. Mohanty

2003-07-01T23:59:59.000Z

340

RESPONSE ROBOTS RESPONSE ROBOTS  

Science Conference Proceedings (OSTI)

... 44 44 • Terrains: Gravel (P) • Terrains: Mud (P) • Obstacles: Inclined Planes (V) • Obstacles: Gap Crossings: Static, Dynamic (V) • Obstacles: Pipe ...

2012-06-06T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Comparison of slope stability in two Brazilian municipal landfills  

SciTech Connect

The implementation of landfill gas to energy (LFGTE) projects has greatly assisted in reducing the greenhouse gases and air pollutants, leading to an improved local air quality and reduced health risks. The majority of cities in developing countries still dispose of their municipal waste in uncontrolled 'open dumps.' Municipal solid waste landfill construction practices and operating procedures in these countries pose a challenge to implementation of LFGTE projects because of concern about damage to the gas collection infrastructure (horizontal headers and vertical wells) caused by minor, relatively shallow slumps and slides within the waste mass. While major slope failures can and have occurred, such failures in most cases have been shown to involve contributory factors or triggers such as high pore pressures, weak foundation soil or failure along weak geosynthetic interfaces. Many researchers who have studied waste mechanics propose that the shear strength of municipal waste is sufficient such that major deep-seated catastrophic failures under most circumstances require such contributory factors. Obviously, evaluation of such potential major failures requires expert analysis by geotechnical specialists with detailed site-specific information regarding foundation soils, interface shearing resistances and pore pressures both within the waste and in clayey barrier layers or foundation soils. The objective of this paper is to evaluate the potential use of very simple stability analyses which can be used to study the potential for slumps and slides within the waste mass and which may represent a significant constraint on construction and development of the landfill, on reclamation and closure and on the feasibility of a LFGTE project. The stability analyses rely on site-specific but simple estimates of the unit weight of waste and the pore pressure conditions and use 'generic' published shear strength envelopes for municipal waste. Application of the slope stability analysis method is presented in a case study of two Brazilian landfill sites; the Cruz das Almas Landfill in Maceio and the Muribeca Landfill in Recife. The Muribeca site has never recorded a slope failure and is much larger and better-maintained when compared to the Maceio site at which numerous minor slumps and slides have been observed. Conventional limit-equilibrium analysis was used to calculate factors of safety for stability of the landfill side slopes. Results indicate that the Muribeca site is more stable with computed factors of safety values in the range 1.6-2.4 compared with computed values ranging from 0.9 to 1.4 for the Maceio site at which slope failures have been known to occur. The results suggest that this approach may be useful as a screening-level tool when considering the feasibility of implementing LFGTE projects.

Gharabaghi, B. [School of Engineering, University of Guelph, Guelph, Ontario, N1G 2W1 (Canada)], E-mail: bgharaba@uoguelph.ca; Singh, M.K. [Department of Civil and Geological Engineering, University of Saskatchewan, Saskatoon, S7N 5A9 (Canada); Inkratas, C. [School of Engineering, University of Guelph, Guelph, Ontario, N1G 2W1 (Canada)], E-mail: cinkrata@uoguelph.ca; Fleming, I.R. [Department of Civil and Geological Engineering, University of Saskatchewan, Saskatoon, S7N 5A9 (Canada)], E-mail: ian.fleming@usask.ca; McBean, E. [School of Engineering, University of Guelph, Guelph, Ontario, N1G 2W1 (Canada)], E-mail: emcbean@uoguelph.ca

2008-07-01T23:59:59.000Z

342

Directional Distributions and Mean Square Slopes in the Equilibrium and Saturation Ranges of the Wave Spectrum  

Science Conference Proceedings (OSTI)

Field observations show that the crosswind component constitutes a significant portion of the ocean surface mean square slope. The average ratio between the crosswind and upwind mean square slope components is 0.88 in slick-covered ocean ...

Paul A. Hwang; David W. Wang

2001-05-01T23:59:59.000Z

343

Observations of Flow and Turbulence in the Nocturnal Boundary Layer over a Slope  

Science Conference Proceedings (OSTI)

Measurements were conducted on an eastern slope of the Salt Lake Basin (SLB) as a part of the Vertical Transport and Mixing Experiment (VTMX) conducted in October 2000. Of interest was the nocturnal boundary layer on a slope (in particular, ...

P. Monti; H. J. S. Fernando; M. Princevac; W. C. Chan; T. A. Kowalewski; E. R. Pardyjak

2002-09-01T23:59:59.000Z

344

Asymmetry of an Equilibrated Gulf Stream–Type Jet over Topographic Slope  

Science Conference Proceedings (OSTI)

The symmetry properties of the Gulf Stream–type jet equilibrated over topographic slope are investigated in a series of idealized numerical experiments. A baroclinically unstable zonal jet equilibrates over a sloping bottom through the process of ...

Sergei A. Frolov; Georgi G. Sutyrin; Isaac Ginis

2004-05-01T23:59:59.000Z

345

Diapycnal Transport and Mixing Efficiency in Stratified Boundary Layers near Sloping Topography  

Science Conference Proceedings (OSTI)

The interaction of shear, stratification, and turbulence in boundary layers on sloping topography is investigated with the help of an idealized theoretical model, assuming uniform bottom slope and homogeneity in the upslope direction. It is shown ...

Lars Umlauf; Hans Burchard

2011-02-01T23:59:59.000Z

346

A Dense Current Flowing down a Sloping Bottom in a Rotating Fluid  

Science Conference Proceedings (OSTI)

A density-driven current was generated in the laboratory by releasing dense fluid over a sloping bottom in a rotating freshwater system. The behavior of the dense fluid descending the slope has been investigated by systematically varying four ...

C. Cenedese; J. A. Whitehead; T. A. Ascarelli; M. Ohiwa

2004-01-01T23:59:59.000Z

347

Slope design and implementation in open pit mines; geological and geomechanical Jean-Alain FLEURISSON  

E-Print Network (OSTI)

stability, slope design, engineering geology, fault, open pit mines, SOMAIR uranium mine, OCP phosphate mine of procedures for abandonment of mine sites where the problems of long-term slope stability may arise1 GHGT-9 Slope design and implementation in open pit mines; geological and geomechanical approach

Paris-Sud XI, Université de

348

TDX North Slope Generating Co | Open Energy Information  

Open Energy Info (EERE)

Generating Co Generating Co Jump to: navigation, search Name TDX North Slope Generating Co Place Alaska Utility Id 19277 Utility Location Yes Ownership I NERC Location AK Operates Generating Plant Yes Activity Generation Yes Activity Transmission Yes Activity Distribution Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] Energy Information Administration Form 826[2] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png No rate schedules available. Average Rates Commercial: $0.1310/kWh The following table contains monthly sales and revenue data for TDX North Slope Generating Co (Alaska). Month RES REV (THOUSAND $) RES SALES (MWH) RES CONS COM REV (THOUSAND $) COM SALES (MWH) COM CONS IND_REV (THOUSAND $) IND SALES (MWH) IND CONS OTH REV (THOUSAND $) OTH SALES (MWH) OTH CONS TOT REV (THOUSAND $) TOT SALES (MWH) TOT CONS

349

Prudhoe expansion. Sohio to triple North Slope presence  

Science Conference Proceedings (OSTI)

Sohio Alaska Petroleum Co. will spend $5.5 billion during the next 5 years to enhance and continue oil production at Prudhoe Bay where the company owns ca. 53% of the oil reserves. Sohio will nearly triple its physical presence on the Slope by the end of 1986, and almost double its Prudhoe staff during that period. A construction work force of between 1500 and 1700 will be required during the 5-year expansion period. Sohio's ongoing production of crude oil averages ca. 840,000 bpd. To continue at this rate, the company plans 29 separation projects on the Slope and completion of an estimated 265 wells over the next 5 years. Many of these projects will be completed over a 5- to 6-yr period. The following are several of Sohio's major 5-year plan projects: produced water expansion; wellpad manifolding; low pressure separation systems; production flowline expansion; artificial gas lift; west side waterflood; gas gathering line loop; west end development, Eileen area; and central power station expansion. A brief description of each project is given.

Not Available

1981-12-01T23:59:59.000Z

350

NETL: Methane Hydrates - Barrow Gas Fields - North Slope Borough, Alaska  

NLE Websites -- All DOE Office Websites (Extended Search)

Phase 2- Drilling and Production Testing the Methane Hydrate Resource Potential associated with the Barrow Gas Fields Last Reviewed 04/06/2010 Phase 2- Drilling and Production Testing the Methane Hydrate Resource Potential associated with the Barrow Gas Fields Last Reviewed 04/06/2010 DE-FC26-06NT42962 Goal The goal of this project is to evaluate, design, drill, log, core and production test methane hydrate resources in the Barrow Gas Fields near Barrow, Alaska to determine its impact on future free gas production and its viability as an energy source. Photo of Barrow welcome sign Performers North Slope Borough, Barrow, Alaska 99723 Petrotechnical Resources Alaska (PRA), Fairbanks, AK 99775 University of Alaska Fairbanks, Fairbanks, AK 99775 Background Phase 1 of the Barrow Gas Fields Hydrate Study provided very strong evidence for the existence of hydrates updip of the East Barrow and Walakpa Gas Fields. Full-field history matched reservoir modeling supported the

351

Low-slope roofing research needs: An ORNL draft assessment  

Science Conference Proceedings (OSTI)

The Low-Slope Roofing Research Needs Agenda is a resource document prepared by the Roofing Industry Research Advisory Panel. The document will aid the Panel in developing recommended research priorities and schedules for the Roof Research Center established by the US Department of Energy at Oak Ridge National Laboratory (ORNL). The Roof Research Center provides the roofing industry with a unique test facility capable of careful, on-line measurements on whole roof systems under controlled, simulated in-service conditions. This type of systems testing, however, is not well-developed in the roofing industry where, customarily, careful measurements are not only made to assess individual material properties under design conditions and systems testing generally is limited to ''performance testing''; that is, exposing roof systems to typical or accelerated environments and observing or measuring the time intergrated effects on various components. This document discusses the capabilities of the center and roofing research issues.

Busching, H.W.; Courville, G.E.; Dvorchak, M.; McCorkle, J.

1987-08-01T23:59:59.000Z

352

Biocorrosive Thermophilic Microbial Communities in Alaskan North Slope Oil Facilities  

DOE Green Energy (OSTI)

Corrosion of metallic oilfield pipelines by microorganisms is a costly but poorly understood phenomenon, with standard treatment methods targeting mesophilic sulfatereducing bacteria. In assessing biocorrosion potential at an Alaskan North Slope oil field, we identified thermophilic hydrogen-using methanogens, syntrophic bacteria, peptideand amino acid-fermenting bacteria, iron reducers, sulfur/thiosulfate-reducing bacteria and sulfate-reducing archaea. These microbes can stimulate metal corrosion through production of organic acids, CO2, sulfur species, and via hydrogen oxidation and iron reduction, implicating many more types of organisms than are currently targeted. Micromolar quantities of putative anaerobic metabolites of C1-C4 n-alkanes in pipeline fluids were detected, implying that these low molecular weight hydrocarbons, routinely injected into reservoirs for oil recovery purposes, are biodegraded and provide biocorrosive microbial communities with an important source of nutrients.

Duncan, Kathleen E.; Gieg, Lisa M.; Parisi, Victoria A.; Tanner, Ralph S.; Green Tringe, Susannah; Bristow, Jim; Suflita, Joseph M.

2009-09-16T23:59:59.000Z

353

Natural gas hydrates on the North Slope of Alaska  

SciTech Connect

Gas hydrates are crystalline substances composed of water and gas, mainly methane, in which a solid-water lattice accommodates gas molecules in a cage-like structure, or clathrate. These substances often have been regarded as a potential (unconventional) source of natural gas. Significant quantities of naturally occurring gas hydrates have been detected in many regions of the Arctic including Siberia, the Mackenzie River Delta, and the North Slope of Alaska. On the North Slope, the methane-hydrate stability zone is areally extensive beneath most of the coastal plain province and has thicknesses as great as 1000 meters in the Prudhoe Bay area. Gas hydrates have been identified in 50 exploratory and production wells using well-log responses calibrated to the response of an interval in one well where gas hydrates were recovered in a core by ARCO Alaska and EXXON. Most of these gas hydrates occur in six laterally continuous Upper Cretaceous and lower Tertiary sandstone and conglomerate units; all these gas hydrates are geographically restricted to the area overlying the eastern part of the Kuparuk River Oil Field and the western part of the Prudhoe Bay Oil Field. The volume of gas within these gas hydrates is estimated to be about 1.0 {times} 10{sup 12} to 1.2 {times} 10{sup 12} cubic meters (37 to 44 trillion cubic feet), or about twice the volume of conventional gas in the Prudhoe Bay Field. Geochemical analyses of well samples suggest that the identified hydrates probably contain a mixture of deep-source thermogenic gas and shallow microbial gas that was either directly converted to gas hydrate or first concentrated in existing traps and later converted to gas hydrate. The thermogenic gas probably migrated from deeper reservoirs along the same faults thought to be migration pathways for the large volumes of shallow, heavy oil that occur in this area. 51 refs., 11 figs., 3 tabs.

Collett, T.S.

1991-01-01T23:59:59.000Z

354

Numerical errors in the presence of steep topography: analysis and alternatives  

SciTech Connect

It is well known in computational fluid dynamics that grid quality affects the accuracy of numerical solutions. When assessing grid quality, properties such as aspect ratio, orthogonality of coordinate surfaces, and cell volume are considered. Mesoscale atmospheric models generally use terrain-following coordinates with large aspect ratios near the surface. As high resolution numerical simulations are increasingly used to study topographically forced flows, a high degree of non-orthogonality is introduced, especially in the vicinity of steep terrain slopes. Numerical errors associated with the use of terrainfollowing coordinates can adversely effect the accuracy of the solution in steep terrain. Inaccuracies from the coordinate transformation are present in each spatially discretized term of the Navier-Stokes equations, as well as in the conservation equations for scalars. In particular, errors in the computation of horizontal pressure gradients, diffusion, and horizontal advection terms have been noted in the presence of sloping coordinate surfaces and steep topography. In this work we study the effects of these spatial discretization errors on the flow solution for three canonical cases: scalar advection over a mountain, an atmosphere at rest over a hill, and forced advection over a hill. This study is completed using the Weather Research and Forecasting (WRF) model. Simulations with terrain-following coordinates are compared to those using a flat coordinate, where terrain is represented with the immersed boundary method. The immersed boundary method is used as a tool which allows us to eliminate the terrain-following coordinate transformation, and quantify numerical errors through a direct comparison of the two solutions. Additionally, the effects of related issues such as the steepness of terrain slope and grid aspect ratio are studied in an effort to gain an understanding of numerical domains where terrain-following coordinates can successfully be used and those domains where the solution would benefit from the use of the immersed boundary method.

Lundquist, K A; Chow, F K; Lundquist, J K

2010-04-15T23:59:59.000Z

355

Energy Performance Impacts from Competing Low-slope Roofing Choices and Photovoltaic Technologies.  

E-Print Network (OSTI)

??With such a vast quantity of space, commercial low-slope roofs offer significant potential for sustainable roofing technology deployment. Specifically, building energy performance can be improved… (more)

Nagengast, Amy L.

2013-01-01T23:59:59.000Z

356

Sub-microradian Surface Slope Metrology with the ALS Developmental Long Trace Profiler  

E-Print Network (OSTI)

upgraded LTP-II at the ALS Optical Metrology Laboratory,”Slope Metrology with the ALS Developmental Long TraceAdvanced Light Source (ALS) Optical Metrology Laboratory (

Yashchuk, Valeriy V.

2009-01-01T23:59:59.000Z

357

Sub-microradian Surface Slope Metrology with the ALS Developmental Long Trace Profiler  

E-Print Network (OSTI)

upgraded LTP-II at the ALS Optical Metrology Laboratory,”Slope Metrology with the ALS Developmental Long Traceto operation at the ALS Optical Metrology Laboratory. The

Yashchuk, Valeriy V

2010-01-01T23:59:59.000Z

358

Sub-microradian Surface Slope Metrology with the ALS Developmental Long Trace Profiler  

Science Conference Proceedings (OSTI)

A new low budget slope measuring instrument, the Developmental Long Trace Profiler (DLTP), was recently brought to operation at the ALS Optical Metrology Laboratory. The design, instrumental control and data acquisition system, initial alignment and calibration procedures, as well as the developed experimental precautions and procedures are described in detail. The capability of the DLTP to achieve sub-microradian surface slope metrology is verified via cross-comparison measurements with other high performance slope measuring instruments when measuring the same high quality test optics. The directions of future work to develop a surface slope measuring profiler with nano-radian performance are also discussed.

Yashchuk, Valeriy V; Barber, Samuel; Domning, Edward E.; Kirschman, Jonathan L.; Morrison, Gregory Y.; Smith, Brian V; Siewert, Frank; Zeschke, Thomas; Geckeler, Ralf; Just, Andreas

2009-09-11T23:59:59.000Z

359

DEVELOPMENT OF SHALLOW VISCOUS OIL RESERVES IN NORTH SLOPE  

Science Conference Proceedings (OSTI)

North Slope of Alaska has huge oil deposits in heavy oil reservoirs such as Ugnu, West Sak and Shrader Bluff etc. The viscosity of the last two reservoir oils vary from {approx}30 cp to {approx}3000 cp and the amount in the range of 10-20 billion barrels. High oil viscosity and low formation strength impose problems to high recovery and well productivity. Water-alternate-gas injection processes can be effective for the lower viscosity end of these deposits in West Sak and Shrader Bluff. Several gas streams are available in the North Slope containing NGL and CO{sub 2} (a greenhouse gas). The goal of this research is to develop tools to find optimum solvent, injection schedule and well-architecture for a WAG process in North Slope shallow sand viscous oil reservoirs. Coreflood, quarter 5-spot study, compositional simulation, wettability, relative permeability study and streamline-based simulation were conducted in this project. 1D compositional simulation results agree reasonably well with those of the slim tube experiments. Injection of CO{sub 2}-NGL is preferable over that of PBG-NGL. MME is sensitive to pressure (in the range of 1300-1800 psi) for the injection of PBG-NGL, but not for CO{sub 2}-NGL. Three hydrocarbon phases form in this pressure range. As the mean thickness of the adsorbed organic layer on minerals increases, the oil-water contact angle increases. The adsorbed organic films left behind after extraction of oil by common aromatic solvents used in core studies, such as toluene and decalin, are thinner than those left behind by non-aromatic solvents, such as cyclohexane. The force of adhesion for minerals aged with just the asphaltene fraction is similar to that of the whole oil implying that asphaltenes are responsible for the mixed-wettability in this reservoir. A new relative permeability model for a four-phase, mixed-wet system has been proposed. A streamline module is developed which can be incorporated in an existing finite-difference based compositional simulator to model water flood, gas flood and WAG flood. Horizontal wells increase well deliverability over vertical wells, but sweep efficiency can decrease. The well performance depends on the well length, position, heterogeneity, and viscosity ratio. The productivity increase due to electromagnetic heating is a function of power intensity, flow rate, and frequency etc. The productivity of a well can be doubled by electromagnetic heating. A high-pressure quarter 5-spot model has been constructed to evaluate the sweep efficiency of miscible WAG floods. WAG displacement reduces bypassing compared to gas floods and improves oil recovery in cores. As the WAG ratio decreased and slug size increased, oil recovery increased. Oil was recovered faster with increased slug size and decreased WAG ratio in the simulations for field cases studied.

Kishore K. Mohanty

2004-12-01T23:59:59.000Z

360

Prediction of a Flash Flood in Complex Terrain. Part I: A Comparison of Rainfall Estimates from Radar, and Very Short Range Rainfall Simulations from a Dynamic Model and an Automated Algorithmic System  

Science Conference Proceedings (OSTI)

Operational prediction of flash floods caused by convective rainfall in mountainous areas requires accurate estimates or predictions of the rainfall distribution in space and time. The details of the spatial distribution are especially critical ...

Thomas T. Warner; Edward A. Brandes; Juanzhen Sun; David N. Yates; Cynthia K. Mueller

2000-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

ADVANCED NUMERICAL TECHNIQUES IN ROCK SLOPE STABILITY ANALYSIS APPLICATIONS AND LIMITATIONS  

E-Print Network (OSTI)

modelling. An example of the use of FLAC in the modelling of buckling type failures in a surface coal mine. FLAC model of buckling failure in a surface coal mine slope. Figure 4. FLAC3D model of china clay slope is described in detail by Benko and Stead (14) and illustrates the possible role of underground coal mining

Eberhardt, Erik

362

The Probability Density Function of Ocean Surface Slopes and Its Effects on Radar Backscatter  

Science Conference Proceedings (OSTI)

Based on Longuet-Higgins’s theory of the probability distribution of wave amplitude and wave period and on some observations, a new probability density function (PDF) of ocean surface slopes is derived. It is where ?x and ?y are the slope ...

Y. Liu; X-H. Yan; W. T. Liu; P. A. Hwang

1997-05-01T23:59:59.000Z

363

Optical Measurements of Capillary-Gravity Wave Spectra Using a Scanning Laser Slope Gauge  

Science Conference Proceedings (OSTI)

A description of a new scanning laser slope gauge (SLSG) is given and the results obtained from both laboratory wind-wave tank and field measurements are presented. The device relies on the measurements of two components of surface slope to ...

Erik J. Bock; Tetsu Hara

1995-04-01T23:59:59.000Z

364

Observations of a Drainage Flow Event on a High-Altitude Simple Slope  

Science Conference Proceedings (OSTI)

Observations of a drainage flow event on a high-altitude simple slope were made for a few hours during a five-day field study that was otherwise characterized by high and gusty winds blowing across the face of the slope believed due to the ...

William E. Clements; Carmen J. Nappo

1983-02-01T23:59:59.000Z

365

Trapping of Waves by a Constant Slope internal Interface in a Two-Layer Ocean  

Science Conference Proceedings (OSTI)

It is well known that “edge” and “continental shelf” waves can be trapped by a constant slope nearshore bottom; in a two-layer ocean of great constant depth, a constant slope internal interface, as well as the associated geostrophic current, can ...

Henri Lacombe

1982-04-01T23:59:59.000Z

366

Evidence of Ascent in a Sloped Barrier Jet and an Associated Heavy-Snow Band  

Science Conference Proceedings (OSTI)

Doppler radar data are used to identify alongstream slope of a barrier jet running parallel to the cast slope of the Front Range of the Colorado Rockies. The barrier jet was collocated with a narrow band of heavy snow embedded within a larger ...

Lawrence B. Dunn

1992-06-01T23:59:59.000Z

367

Exporting Alaskan North Slope crude oil: Benefits and costs  

SciTech Connect

The Department of Energy study examines the effects of lifting the current prohibitions against the export of Alaskan North Slope (ANS) crude. The study concludes that permitting exports would benefit the US economy. First, lifting the ban would expand the markets in which ANS oil can be sold, thereby increasing its value. ANS oil producers, the States of California and Alaska, and some of their local governments all would benefit from increased revenues. Permitting exports also would generate new economic activity and employment in California and Alaska. The study concludes that these economic benefits would be achieved without increasing gasoline prices (either in California or in the nation as a whole). Lifting the export ban could have important implications for US maritime interests. The Merchant Marine Act of 1970 (known as the Jones Act) requires all inter-coastal shipments to be carried on vessels that are US-owned, US-crewed, and US-built. By limiting the shipment of ANS crude to US ports only, the export ban creates jobs for the seafarers and the builders of Jones Act vessels. Because the Jones Act does not apply to exports, however, lifting the ban without also changing US maritime law would jeopardize the jobs associated with the current fleet of Jones Act tankers. Therefore the report analyzes selected economic impacts of several maritime policy alternatives, including: Maintaining current law, which allows foreign tankers to carry oil where export is allowed; requiring exports of ANS crude to be carried on Jones Act vessels; and requiring exports of ANS crude to be carried on vessels that are US-owned and US-crewed, but not necessarily US-built. Under each of these options, lifting the export ban would generate economic benefits.

Not Available

1994-06-01T23:59:59.000Z

368

Economics of Alaska North Slope gas utilization options  

SciTech Connect

The recoverable natural gas available for sale in the developed and known undeveloped fields on the Alaskan North Slope (ANS) total about 26 trillion cubic feet (TCF), including 22 TCF in the Prudhoe Bay Unit (PBU) and 3 TCF in the undeveloped Point Thomson Unit (PTU). No significant commercial use has been made of this large natural gas resource because there are no facilities in place to transport this gas to current markets. To date the economics have not been favorable to support development of a gas transportation system. However, with the declining trend in ANS oil production, interest in development of this huge gas resource is rising, making it important for the U.S. Department of Energy, industry, and the State of Alaska to evaluate and assess the options for development of this vast gas resource. The purpose of this study was to assess whether gas-to-liquids (GTL) conversion technology would be an economic alternative for the development and sale of the large, remote, and currently unmarketable ANS natural gas resource, and to compare the long term economic impact of a GTL conversion option to that of the more frequently discussed natural gas pipeline/liquefied natural gas (LNG) option. The major components of the study are: an assessment of the ANS oil and gas resources; an analysis of conversion and transportation options; a review of natural gas, LNG, and selected oil product markets; and an economic analysis of the LNG and GTL gas sales options based on publicly available input needed for assumptions of the economic variables. Uncertainties in assumptions are evaluated by determining the sensitivity of project economics to changes in baseline economic variables.

Thomas, C.P.; Doughty, T.C.; Hackworth, J.H.; North, W.B.; Robertson, E.P.

1996-08-01T23:59:59.000Z

369

Alaska North Slope Tundra Travel Model and Validation Study  

SciTech Connect

The Alaska Department of Natural Resources (DNR), Division of Mining, Land, and Water manages cross-country travel, typically associated with hydrocarbon exploration and development, on Alaska's arctic North Slope. This project is intended to provide natural resource managers with objective, quantitative data to assist decision making regarding opening of the tundra to cross-country travel. DNR designed standardized, controlled field trials, with baseline data, to investigate the relationships present between winter exploration vehicle treatments and the independent variables of ground hardness, snow depth, and snow slab thickness, as they relate to the dependent variables of active layer depth, soil moisture, and photosynthetically active radiation (a proxy for plant disturbance). Changes in the dependent variables were used as indicators of tundra disturbance. Two main tundra community types were studied: Coastal Plain (wet graminoid/moist sedge shrub) and Foothills (tussock). DNR constructed four models to address physical soil properties: two models for each main community type, one predicting change in depth of active layer and a second predicting change in soil moisture. DNR also investigated the limited potential management utility in using soil temperature, the amount of photosynthetically active radiation (PAR) absorbed by plants, and changes in microphotography as tools for the identification of disturbance in the field. DNR operated under the assumption that changes in the abiotic factors of active layer depth and soil moisture drive alteration in tundra vegetation structure and composition. Statistically significant differences in depth of active layer, soil moisture at a 15 cm depth, soil temperature at a 15 cm depth, and the absorption of photosynthetically active radiation were found among treatment cells and among treatment types. The models were unable to thoroughly investigate the interacting role between snow depth and disturbance due to a lack of variability in snow depth cover throughout the period of field experimentation. The amount of change in disturbance indicators was greater in the tundra communities of the Foothills than in those of the Coastal Plain. However the overall level of change in both community types was less than expected. In Coastal Plain communities, ground hardness and snow slab thickness were found to play an important role in change in active layer depth and soil moisture as a result of treatment. In the Foothills communities, snow cover had the most influence on active layer depth and soil moisture as a result of treatment. Once certain minimum thresholds for ground hardness, snow slab thickness, and snow depth were attained, it appeared that little or no additive effect was realized regarding increased resistance to disturbance in the tundra communities studied. DNR used the results of this modeling project to set a standard for maximum permissible disturbance of cross-country tundra travel, with the threshold set below the widely accepted standard of Low Disturbance levels (as determined by the U.S. Fish and Wildlife Service). DNR followed the modeling project with a validation study, which seemed to support the field trial conclusions and indicated that the standard set for maximum permissible disturbance exhibits a conservative bias in favor of environmental protection. Finally DNR established a quick and efficient tool for visual estimations of disturbance to determine when investment in field measurements is warranted. This Visual Assessment System (VAS) seemed to support the plot disturbance measurements taking during the modeling and validation phases of this project.

Harry R. Bader; Jacynthe Guimond

2006-03-01T23:59:59.000Z

370

NETL: Oil & Natural Gas Projects: Alaska North Slope Oil and Gas  

NLE Websites -- All DOE Office Websites (Extended Search)

Alaska North Slope Oil and Gas Transportation Support System Last Reviewed 12/23/2013 Alaska North Slope Oil and Gas Transportation Support System Last Reviewed 12/23/2013 DE-FE0001240 Goal The primary objectives of this project are to develop analysis and management tools related to Arctic transportation networks (e.g., ice and snow road networks) that are critical to North Slope, Alaska oil and gas development. Performers Geo-Watersheds Scientific, Fairbanks, AK 99708 University of Alaska Fairbanks, Fairbanks, AK 99775 Idaho National Laboratory, Idaho Falls, ID 83415 Background Oil and gas development on the North Slope is critical for maintaining U.S. energy supplies and is facing a period of new growth to meet the increasing energy needs of the nation. A majority of all exploration and development activities, pipeline maintenance, and other field support projects take

371

Circulation Induced by River Inflow in Well Mixed Water over a Sloping Continental Shelf  

Science Conference Proceedings (OSTI)

The pressure field over a sloping continental shelf subject to freshwater runoff at the coast can be resolved into a nearly two-dimensional dynamic height field and a residual field, the latter arising from the interaction of baroclinity and ...

G. T. Csanady

1984-11-01T23:59:59.000Z

372

Mass transport in the Stokes edge wave for constant arbitrary bottom slope in a rotating ocean  

Science Conference Proceedings (OSTI)

The Lagrangian mass transport in the Stokes surface edge wave is obtained from the vertically integrated equations of momentum and mass in a viscous rotating ocean, correct to second order in wave steepness. The analysis is valid for bottom slope ...

Peygham Ghaffari; Jan Erik H. Weber

373

On the Shape–Slope Relation of Drop Size Distributions in Convective Rain  

Science Conference Proceedings (OSTI)

The relation between the slope and shape parameters of the raindrop size distribution parameterized by a gamma distribution is examined. The comparison of results of a simple rain shaft model with an empirical relation based on disdrometer ...

Axel Seifert

2005-07-01T23:59:59.000Z

374

Data from Innovative Methane Hydrate Test on Alaska's North Slope Now  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Data from Innovative Methane Hydrate Test on Alaska's North Slope Data from Innovative Methane Hydrate Test on Alaska's North Slope Now Available on NETL Website Data from Innovative Methane Hydrate Test on Alaska's North Slope Now Available on NETL Website March 11, 2013 - 10:07am Addthis DOE participated in gas hydrate field production trials in early 2012 in partnership with ConocoPhillips and the Japan Oil, Gas and Metals National Corp at the IÄ¡nik Sikumi (Inupiat for “Fire in the Ice”) test well, shown here, on the north slope of Alaska. Datasets from that field trial are now available to the public. DOE participated in gas hydrate field production trials in early 2012 in partnership with ConocoPhillips and the Japan Oil, Gas and Metals National Corp at the Iġnik Sikumi (Inupiat for "Fire in the Ice") test well,

375

Quasi-Steady Katabatic Winds on Slopes in Wide Valleys: Hydraulic Theory and Observations  

Science Conference Proceedings (OSTI)

Theoretical and field observational studies on mean velocity and temperature fields of quasi-steady nocturnal downslope (katabatic) flows on sloping surfaces are reported for the case of very wide valleys in the presence of weak synoptic winds. ...

M. Princevac; J. C. R. Hunt; H. J. S. Fernando

2008-02-01T23:59:59.000Z

376

NETL: News Release -Alaskan North Slope Well to Sample and Test...  

NLE Websites -- All DOE Office Websites (Extended Search)

February 20, 2007 Alaskan North Slope Well to Sample and Test Gas Hydrate DOE-Led Interagency R&D Effort Key Step to Unlocking Vast Energy Resource WASHINGTON, DC - Drilling is...

377

Evolvement of tsunami waves on the continental shelves with gentle slope in the China Seas  

Science Conference Proceedings (OSTI)

Potential tsunami generated in the Okinawa Trench or the Manila Trench may attack the southeast coast of China. The continental shelves with extremely gentle slope in the China Seas affect the evolvement of tsunami waves. In this paper

2013-01-01T23:59:59.000Z

378

A Modified Logarithmic Law for Neutrally Stratified Flow over Low-Sloped Hills  

Science Conference Proceedings (OSTI)

The study of the atmospheric boundary layer flow over two-dimensional low-sloped hills under a neutral atmosphere finds numerous applications in meteorology and engineering, such as the development of large-scale atmospheric models, the siting of ...

Cláudio C. Pellegrini; Gustavo C. R. Bodstein

2005-06-01T23:59:59.000Z

379

Tidally Forced Internal Waves and Overturns Observed on a Slope: Results from HOME  

Science Conference Proceedings (OSTI)

Tidal mixing over a slope was explored using moored time series observations on Kaena Ridge extending northwest from Oahu, Hawaii, during the Survey component of the Hawaii Ocean Mixing Experiment (HOME). A mooring was instrumented to sample the ...

Murray D. Levine; Timothy J. Boyd

2006-06-01T23:59:59.000Z

380

Diapycnal Diffusivity Inferred from Scalar Microstructure Measurements near the New England Shelf/Slope Front  

Science Conference Proceedings (OSTI)

Conductivity microstructure was used to estimate the diapycnal thermal eddy diffusivity KT near the New England shelf/slope front in early August 1997. Two datasets were collected with a towed vehicle. One involved several horizontal tows in and ...

Chris R. Rehmann; Timothy F. Duda

2000-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Model for Calculating Photosynthetic Photon Flux Densities in Forest Openings on Slopes  

Science Conference Proceedings (OSTI)

A model has been developed to calculate the spatial distribution of the photosynthetic photon flux density (PPFD) in elliptical forest openings of given slopes and orientations. The PPFD is separated into direct and diffuse components. The direct ...

Jing M. Chen; T. Andrew Black; David T. Price; Reid E. Carter

1993-10-01T23:59:59.000Z

382

Episodes of Strong Flow down the Western Slope of the Subtropical Andes  

Science Conference Proceedings (OSTI)

Nocturnal flows down the narrow Andean valleys within the western slope of the subtropical Andes (central Chile) are episodically enhanced by easterly downslope winds that flow into the Santiago basin over the radiatively cooled air above the ...

JoséA. Rutllant; RenéD. Garreaud

2004-02-01T23:59:59.000Z

383

Engineering properties of Resedimented Ugnu Clay from the Alaskan North Slope  

E-Print Network (OSTI)

This research determined the engineering properties of laboratory Resedimented Ugnu Clay (RUC) specimens created using recovered material from 3800 ft below the surface of the Alaskan Northern Slope to aid with future ...

Jones, Cullen A. (Cullen Albert)

2010-01-01T23:59:59.000Z

384

Long-Term Coastal Upwelling over a Continental Shelf–Slope  

Science Conference Proceedings (OSTI)

Long-term coastal upwelling over a continental shelf-slope with emphasis on the planetary dispersion of Rossby waves is studied with numerical models. The ocean is forced by a wind stress with a limited longshore extent. The thermocline ...

Nobuo Suginohara; Yoshiteru Kitamura

1984-06-01T23:59:59.000Z

385

The Development of the Barotropic Radiation Field of an Eddy over a Slope  

Science Conference Proceedings (OSTI)

Low-frequency current measurements near the shelf break south of Nova Scotia indicate that the presence of topographic waves on the continental slope, and rise is associated with large-scale shoreward excursions and formation of eddies by the ...

John P. Louis; Peter C. Smith

1982-01-01T23:59:59.000Z

386

Thermal Fronts Generated by Internal Waves Propagating Obliquely along the Continental Slope  

Science Conference Proceedings (OSTI)

Rapid temperature falls occurring at semidiurnal periods are observed close to the bottom above the continental slope in the Bay of Biscay. Simultaneous current measurements reveal that the abrupt temperature decrease O(0.5 K) within one minute ...

Johannes R. Gemmrich; Hans van Haren

2001-03-01T23:59:59.000Z

387

ARMs Climate Change Educational Outreach on the North Slope...  

NLE Websites -- All DOE Office Websites (Extended Search)

ARM's Climate Change Educational Outreach on the North Slope of Alaska C. E. Talus, F. J. Barnes, and M. H. Springer Los Alamos National Laboratory Los Alamos, New Mexico R. H....

388

Daytime Heat Transfer Processes Related to Slope Flows and Turbulent Convection in an Idealized Mountain Valley  

Science Conference Proceedings (OSTI)

The mechanisms governing the daytime development of thermally driven circulations along the transverse axis of idealized two-dimensional valleys are investigated by means of large-eddy simulations. In particular, the impact of slope winds and ...

Stefano Serafin; Dino Zardi

2010-11-01T23:59:59.000Z

389

The Cascade of Tidal Energy from Low to High Modes on a Continental Slope  

Science Conference Proceedings (OSTI)

The linear transfer of tidal energy from large to small scales is quantified for small tidal excursion over a near-critical continental slope. A theoretical framework for low-wavenumber energy transfer is derived from “flat bottom” vertical modes ...

Samuel M. Kelly; Jonathan D. Nash; Kim I. Martini; Matthew H. Alford; Eric Kunze

2012-07-01T23:59:59.000Z

390

Tidal Eulerian Residual Currents over a Slope: Analytical and Numerical Frictionless Models  

Science Conference Proceedings (OSTI)

The Eulerian residual tidal currents generated over a continental slope are examined. Using the assumption of a Poincaré wave, the linear frictionless solution of a semidiurnal tidal wave propagating from the deep ocean to a constant depth ...

Robert Mazé; Gilbert Langlois; François Grosjean

1998-07-01T23:59:59.000Z

391

Acceleration of a Stratified Current over a Sloping Bottom, Driven by an Alongshelf Pressure Gradient  

Science Conference Proceedings (OSTI)

An idealized theoretical model is developed for the acceleration of a two-dimensional, stratified current over a uniformly sloping bottom, driven by an imposed alongshelf pressure gradient and taking into account the effects of buoyancy advection ...

David C. Chapman; Steven J. Lentz

2005-08-01T23:59:59.000Z

392

Asymmetric Behavior of an Oceanic Boundary Layer above a Sloping Bottom  

Science Conference Proceedings (OSTI)

The effects of stratification, planetary rotation and a sloping bottom combine to produce an asymmetric response in which the characteristics of an oceanic bottom boundary layer depend on the direction, in addition to the magnitude, of the along-...

J. H. Trowbridge; S. J. Lentz

1991-08-01T23:59:59.000Z

393

Comparing Temperature and Humidity on a Mountain Slope and in the Free Air Nearby  

Science Conference Proceedings (OSTI)

Surface temperature and humidity data measured by eight remote weather stations on a south-facing slope in the San Bernardino Mountains of Southern California were compared with temperature and humidity data measured by a rawinsonde at the same ...

Morris H. McCutchan

1983-04-01T23:59:59.000Z

394

The Response of Stratified Shelf and Slope Waters to Steady Offshore Forcing  

Science Conference Proceedings (OSTI)

The effect of steady, deep-ocean forcing on the flow over a continental slope and shelf region is examined using a linear and time-independent numerical model which includes continuous stratification, vertical and horizontal diffusion of momentum ...

Kathryn A. Kelly; David C. Chapman

1988-06-01T23:59:59.000Z

395

Observed Oceanic Response over the Upper Continental Slope and Outer Shelf during Hurricane Ivan  

Science Conference Proceedings (OSTI)

Hurricane Ivan passed directly over an array of 14 acoustic Doppler current profilers deployed along the outer continental shelf and upper slope in the northeastern Gulf of Mexico. Currents in excess of 200 cm s?1 were generated during this ...

W. J. Teague; E. Jarosz; D. W. Wang; D. A. Mitchell

2007-09-01T23:59:59.000Z

396

Exact Solutions of Wind-Driven Coastal Upwelling and Downwelling over Sloping Topography  

Science Conference Proceedings (OSTI)

The dynamics of wind-driven coastal upwelling and downwelling are studied using a simplified dynamical model. Exact solutions are examined as a function of time and over a family of sloping topographies. Assumptions in the two-dimensional model ...

P. F. Choboter; Dana Duke; J. P. Horton; Paul Sinz

2011-07-01T23:59:59.000Z

397

An Investigation of the Slope–Shape Relation for Gamma Raindrop Size Distribution  

Science Conference Proceedings (OSTI)

The gamma drop size distribution (DSD) has been widely used in the meteorological community for years to model observed DSD. It has been found that the relation between the slope (?) and shape (?) parameters of the gamma DSD can be empirically ...

Yen-Hsyang Chu; Ching-Lun Su

2008-10-01T23:59:59.000Z

398

Subinertial Slope-Trapped Waves in the Northeastern Gulf of Mexico  

Science Conference Proceedings (OSTI)

Current velocity from moored arrays of acoustic Doppler current profilers (ADCPs) deployed on the outer shelf and slope, south of Mobile Bay in the northeastern Gulf of Mexico, shows evidence of alongslope, generally westward-propagating ...

Z. R. Hallock; W. J. Teague; E. Jarosz

2009-06-01T23:59:59.000Z

399

Pressure-slope momentum transfer in ocean surface boundary layers coupled with gravity waves  

Science Conference Proceedings (OSTI)

The paper focuses on the consequences of including surface and subsurface, wind forced, pressure-slope momentum transfer into the oceanic water column, a transfer process which competes with now-conventional turbulence transfer based on mixing ...

George Mellor

400

A chronostratigraphic framework for the northwestern slope of the gulf of mexico  

E-Print Network (OSTI)

Sediments from two cores, JPC31 and JPC46, were analyzed to better understand the relationship between climate and sediment deposition on the continental slope of the northwestern Gulf of Mexico. These two cores were selected from a suite of cores collected from the slope of the Gulf of Mexico after examining how bulk density varied with depth in the cores. The presence/absence of Globoratalia menardii, down-core variations of the 18O of Globigerinoides ruber, tephrochronology, and radiocarbon dating of G. ruber were used to determine the chronologies of the sediments in the cores. Globorotalia menardii were present until a depth of 100 cm in JPC31. The entrance of G. menardii in the Gulf of Mexico was dated at 8 kyr. Analysis of an ash layer found in both JPC31 and 46 yielded a date of 84 kyr, at depths of 700 cm and 1440 cm, respectively. Radiocarbon dating yielded four ages in JPC31. In sediment core JPC31, Marine Isotope Stage (MIS) 1-5 were recorded. In sediment core JPC46, MIS 2-4 and a portion of MIS 5 were recorded. These results provide a framework for determining general sedimentation rates from the northwestern slope of the Gulf of Mexico. Events in the density profiles in JPC31 and JPC46 were correlated to corresponding events in the rest of the slope cores, allowing the chronologies of JPC31 and JPC46 to be transferred to the suite of the slope cores. Sedimentation rates along different portions of the slope were then calculated, and variations in these sedimentation rates were used to better understand slope sedimentary processes. Sedimentation rates on the northwestern slope of the Gulf of Mexico were calculated for the most recent 120,000 years and compared with climate to deduce trends. Sedimentation rates for MIS 1-5 ranged from 7 cm/kyr to 28 cm/kyr. The sedimentation rate for the last glaciation (MIS 2, 3, and 4) were the highest for the time interval studied. The lowered sea level during glacial advances brings sediments farther out onto the slope; therefore, a higher sedimentation rate is expected during this time. These rates varied from 22 cm/kyr near the coast to 7 cm/kyr toward the abyssal plains. Of the 12 cores analyzed along the slope, JPC23 and JPC24 had the lowest sedimentation rates. This is likely due to high density bottom currents and turbidity currents which carry sediments farther out on the slope. Therefore, the lowest sedimentation rates would be expected a great distance from the land mass and some distance from the abyssal plains.

Elston, Kristen Eileen

2005-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Bringing Alaska North Slope Natural Gas to Market (released in AEO2009)  

Reports and Publications (EIA)

At least three alternatives have been proposed over the years for bringing sizable volumes of natural gas from Alaskas remote North Slope to market in the lower 48 States: a pipeline interconnecting with the existing pipeline system in central Alberta, Canada; a GTL plant on the North Slope; and a large LNG export facility at Valdez, Alaska. NEMS explicitly models the pipeline and GTL options [63]. The what if LNG option is not modeled in NEMS.

Information Center

2009-03-31T23:59:59.000Z

402

Ten-year growth of woody species planted in reclaimed mined banks with different slopes  

SciTech Connect

In landscape reconstruction in an opencast coal mine, a gradient of slopes can be obtained. The slope gradient can affect different processes, such as plant growth, especially in semi-arid conditions. On the other hand, to favor the heterogeneity of habitats and ensure long-term restoration, late successional woody species have been planted but with heterogeneous results. In this study, the effect of a slope gradient (from 11.4 to 15.5 degrees) on the growth and survival of five Mediterranean woody species 10 years after the reconstruction of mining banks was evaluated. Slope gradient reduced height growth significantly from 10 cm degree{sup -1} (lentish) to 25 cm degree{sup -1} (pine) in 10-year- old woody species. This gradient also reduced basal diameter growth from 0.22 mm degree{sup -1} (juniper) to 0.58 mm degree{sup -1} (pine). Survival and slope were not significantly correlated. Growth and survival of the 10-year- old woody species were equal to or higher than those of the same species in other afforestations in semi-arid conditions. This outcome demonstrates the adequacy of species and applied techniques of restoration that allow a long-term reliability of reclaimed mine slopes.

Badia, D.; Valero, R.; Gracia, A.; Marti, C.; Molina, F. [Escuela Politecnica Superior, Huesca (Spain)

2007-01-15T23:59:59.000Z

403

The relation between the optical spectral slope and the luminosity for 17 Palomar-Green QSOs  

E-Print Network (OSTI)

Using 7.5-year spectroscopic monitoring data of a sample of 17 Palomar-Green QSOs (PG QSOs) (z=0.061-0.371), we obtain the optical spectral slope for each object at all epochs by a power-law fit to the spectra in continuum bands. All of these 17 PG QSOs exhibit obvious spectral slope variability. Most of the 17 objects show anti-correlation between the spectral slope and the rest-frame 5100$\\AA$ continuum flux while five of them exist strong anti-correlation (correlation coefficient R larger than 0.5). For the ensemble of these 17 PG QSOs, a strong anti-correlation between the average spectral slope and the average rest-frame 5100$\\AA$ luminosity is found while no correlation is found between the spectral slope and the Eddington ratio. A median anti-correlation between spectral slope changes and continuum flux variations is also found which indicates a hardening of the spectrum during bright phases. Accretion disk (jet) instability models with other mechanisms associated with changes in the accretion processes are promising.

X. Pu; W. Bian; K. Huang

2006-07-29T23:59:59.000Z

404

Sub-microradian Surface Slope Metrology with the ALS Developmental Long Trace Profiler  

Science Conference Proceedings (OSTI)

Development of X-ray optics for 3rd and 4th generation X-ray light sources with a level of surface slope precision of 0.1-0.2 {micro}rad requires the development of adequate fabrication technologies and dedicated metrology instrumentation and methods. Currently, the best performance of surface slope measurement has been achieved with the NOM (Nanometer Optical Component Measuring Machine) slope profiler at BESSY (Germany) [1] and the ESAD (Extended Shear Angle Difference) profiler at the PTB (Germany) [2]. Both instruments are based on electronic autocollimators (AC) precisely calibrated for the specific application [3] with small apertures of 2.5-5 mm in diameter. In the present work, we describe the design, initial alignment and calibration procedures, the instrumental control and data acquisition system, as well as the measurement performance of the Developmental Long Trace Profiler (DLTP) slope measuring instrument recently brought into operation at the Advanced Light Source (ALS) Optical Metrology Laboratory (OML). Similar to the NOM and ESAD, the DLTP is based on a precisely calibrated autocollimator. However, this is a reasonably low budget instrument used at the ALS OML for the development and testing of new measuring techniques and methods. Some of the developed methods have been implemented into the ALS LTP-II (slope measuring long trace profiler [4]) which was recently upgraded and has demonstrated a capability for 0.25 {micro}rad surface metrology [5]. Performance of the DLTP was verified via a number of measurements with high quality reference mirrors. A comparison with the corresponding results obtained with the world's best slope measuring instrument, the BESSY NOM, proves the accuracy of the DLTP measurements on the level of 0.1-0.2 {micro}rad depending on the curvature of a surface under test. The directions of future work to develop a surface slope measuring profiler with nano-radian performance are also discussed.

Yashchuk, Valeriy V.; Barber, Samuel; Domning, Edward E.; Kirschman, Jonathan L.; Morrison, Gregory Y.; Smith, Brian V.; Siewert, Frank; Zeschke, Thomas; Geckeler, Ralf; Just, Andreas

2009-06-15T23:59:59.000Z

405

COMPARISON OF SPECTRAL SLOPES OF MAGNETOHYDRODYNAMIC AND HYDRODYNAMIC TURBULENCE AND MEASUREMENTS OF ALIGNMENT EFFECTS  

Science Conference Proceedings (OSTI)

We performed a series of high-resolution (up to 1024{sup 3}) direct numerical simulations of hydro and magnetohydrodynamic (MHD) turbulence. Our simulations correspond to the 'strong' MHD turbulence regime that cannot be treated perturbatively. We found that for simulations with normal viscosity the slopes for energy spectra of MHD are similar to ones in hydro, although slightly more shallower. However, for simulations with hyperviscosity the slopes were very different, for instance, the slopes for hydro simulations showed a pronounced and well defined bottleneck effect, while the MHD slopes were relatively much less affected. We believe that this is indicative of MHD strong turbulence being less local than the Kolmogorov turbulence. This calls for revision of MHD strong turbulence models that assume local 'as-in-hydro case' cascading. Nonlocality of MHD turbulence casts doubt on numerical determination of the slopes with currently available (512{sup 3}-1024{sup 3}) numerical resolutions, including simulations with normal viscosity. We also measure various so-called alignment effects and discuss their influence on the turbulent cascade.

Beresnyak, A.; Lazarian, A. [Department of Astronomy, University of Wisconsin, Madison, WI 53706 (United States)], E-mail: andrey@astro.wisc.edu, E-mail: lazarian@astro.wisc.edu

2009-09-10T23:59:59.000Z

406

Wintertime Surface Wind Patterns in the Colorado River Valley  

Science Conference Proceedings (OSTI)

The diurnal variation of regional wind patterns in the complex terrain of the Grand Canyon area was investigated for wintertime fair weather days using a network of wind sensors on 10-m towers. Thermally driven along-slope and along-valley ...

C. David Whiteman; Xindi Bian; Joe L. Sutherland

1999-08-01T23:59:59.000Z

407

Land Suitability Evaluation for Sorghum Using GIS: A Case Study of Jiangyang  

Science Conference Proceedings (OSTI)

The objective of this paper is to evaluate land suitability for sorghum using geographic information system (GIS). Terrain attributes (slope and aspect) and soil physical and chemical properties (effective soil depth, organic matter, texture, available ... Keywords: Class, Factor, Crop, Suitable, Jiangyang

Qing Peng; Wei Wu; Hong-Bin Liu

2011-03-01T23:59:59.000Z

408

Horizontal Grid Size Selection and its Influence on Mesoscale Model Simulations  

Science Conference Proceedings (OSTI)

The use of two-dimensional spectral analysis applied to terrain heights in order to determine characteristic terrain spatial scales and its subsequent use for the objective definition of an adequate grid size required to resolve terrain forcing ...

Rosa Salvador; Josep Calbó; Millán M. Millán

1999-09-01T23:59:59.000Z

409

CTDMPLUS: A Dispersion Model for Sources near Complex Topography. Part I: Technical Formulations  

Science Conference Proceedings (OSTI)

The Complex Terrain Dispersion Model (CTDMPLUS), a point-source, steady-state model for complex-terrain applications, is described. The model simulates the flow and plume distortion near user-selected, three-dimensional terrain features, yet ...

Steven G. Perry

1992-07-01T23:59:59.000Z

410

File:EIA-AK-NorthSlope-liquids.pdf | Open Energy Information  

Open Energy Info (EERE)

Alaskan North Slope By 2001 Liquids Reserve Class Alaskan North Slope By 2001 Liquids Reserve Class Size of this preview: 776 × 600 pixels. Full resolution ‎(6,600 × 5,100 pixels, file size: 2.17 MB, MIME type: application/pdf) Description Alaskan North Slope By 2001 Liquids Reserve Class Sources Energy Information Administration Authors Samuel H. Limerick; Lucy Luo; Gary Long; David F. Morehouse; Jack Perrin; Robert F. King Related Technologies Oil, Natural Gas Creation Date 2005-09-01 Extent Regional Countries United States UN Region Northern America States Alaska File history Click on a date/time to view the file as it appeared at that time. Date/Time Thumbnail Dimensions User Comment current 16:57, 20 December 2010 Thumbnail for version as of 16:57, 20 December 2010 6,600 × 5,100 (2.17 MB) MapBot (Talk | contribs) Automated bot upload

411

File:EIA-AK-NorthSlope-gas.pdf | Open Energy Information  

Open Energy Info (EERE)

Alaskan North Slope By 2001 Gas Reserve Class Alaskan North Slope By 2001 Gas Reserve Class Size of this preview: 776 × 600 pixels. Full resolution ‎(6,600 × 5,100 pixels, file size: 2.16 MB, MIME type: application/pdf) Description Alaskan North Slope By 2001 Gas Reserve Class Sources Energy Information Administration Authors Samuel H. Limerick; Lucy Luo; Gary Long; David F. Morehouse; Jack Perrin; Robert F. King Related Technologies Oil, Natural Gas Creation Date 2005-09-01 Extent Regional Countries United States UN Region Northern America States Alaska File history Click on a date/time to view the file as it appeared at that time. Date/Time Thumbnail Dimensions User Comment current 16:57, 20 December 2010 Thumbnail for version as of 16:57, 20 December 2010 6,600 × 5,100 (2.16 MB) MapBot (Talk | contribs) Automated bot upload

412

File:EIA-AK-NorthSlope-BOE.pdf | Open Energy Information  

Open Energy Info (EERE)

File File Edit with form History Facebook icon Twitter icon » File:EIA-AK-NorthSlope-BOE.pdf Jump to: navigation, search File File history File usage Alaskan North Slope By 2001 BOE Reserve Class Size of this preview: 776 × 600 pixels. Full resolution ‎(6,600 × 5,100 pixels, file size: 2.16 MB, MIME type: application/pdf) Description Alaskan North Slope By 2001 BOE Reserve Class Sources Energy Information Administration Authors Samuel H. Limerick; Lucy Luo; Gary Long; David F. Morehouse; Jack Perrin; Robert F. King Related Technologies Oil, Natural Gas Creation Date 2005-09-01 Extent Regional Countries United States UN Region Northern America States Alaska File history Click on a date/time to view the file as it appeared at that time. Date/Time Thumbnail Dimensions User Comment

413

Process of Equiaxed Grains of RE-Al Alloy under Slope Vibration  

SciTech Connect

A new technique using slope vibration casting process during heating and isothermal holding period to prepare Al-7Si-2RE alloy has been studied. The small, near-spherical and non-dendritic microstructure with the semi-solid processing requirements has been obtained. Experiments show that the cooling method, pouring process and the convection of melt caused by slope vibration had significant effects on the formation of near-spherical primary gains. The water-cooled copper mold casting with slope vibration at the temperature near liquidus can obtain Al-7Si-2RE alloy with small homogeneous equiaxed grains, the average grain diameter is 48.3 mum, and the average grain roundness is 1.92.

Xie Shikun; Yi Rongxi; Pan Xiaoliang; Zheng Xiaoqiu; Guo Xiuyan [School of Engineering, Jinggangshan University, Ji'an, 343009 (China)

2010-06-15T23:59:59.000Z

414

Building and Evaluating Borehole-Image-Constrained Facies Models of a Complex Channelised Slope System, Karoo Basin, South Africa.  

E-Print Network (OSTI)

??As hydrocarbons become scarcer, submarine channelised slope systems have become a focus of exploration due to their reservoir potential. Outcrops of both levee-confined (Unit C)… (more)

Van Toorenenburg, K.A.

2012-01-01T23:59:59.000Z

415

DHS-NIST-ASTM Robot Test Methods (v2011.1) BLANK ...  

Science Conference Proceedings (OSTI)

... Page 30 • Terrains: Sand (P) • Terrains ... IDENTIFIER PAN TILT ZOOM (OPT/DIG) COLOR I/RB/W NO YES VAR NO YES VAR FIXED AUTO -TIGHT ...

2013-02-04T23:59:59.000Z

416

NIST Global Standards Information WTO TBT Inquiry Point  

Science Conference Proceedings (OSTI)

... was included allowing manufacturers to certify all-terrain vehicles over a steady ... Manufacturers with only one "all-terrain vehicle exhaust emission ...

417

Automated approaches for extracting individual tree level forest information using high spatial resolution remotely sensed data  

E-Print Network (OSTI)

Laser Terrain Mapper (ALTM) unit, Inertial Measurement Unit (IMU) and Differential Global Positioning System (Laser Terrain Mapper (ALTM) unit, Differential Global Positioning System (DGPS) and Inertial Measurement

Lee, Jun Hak

2010-01-01T23:59:59.000Z

418

Mooring-Based Observations of Double-Diffusive Staircases over the Laptev Sea Slope  

Science Conference Proceedings (OSTI)

A yearlong time series from mooring-based high-resolution profiles of water temperature and salinity from the Laptev Sea slope (2003–04; 2686-m depth; 78°26?N, 125°37?E) shows six remarkably persistent staircase layers in the depth range of ~140–...

Igor V. Polyakov; Andrey V. Pnyushkov; Robert Rember; Vladimir V. Ivanov; Y.-D. Lenn; Laurie Padman; Eddy C. Carmack

2012-01-01T23:59:59.000Z

419

The Shape–Slope Relation in Observed Gamma Raindrop Size Distributions: Statistical Error or Useful Information?  

Science Conference Proceedings (OSTI)

The three-parameter gamma distribution n(D) = N0Dµ exp(–?D) is often used to characterize a raindrop size distribution (DSD). The parameters µ and ? correspond to the shape and slope of the DSD. If µ and ? are related to one another, as recent ...

Guifu Zhang; J. Vivekanandan; Edward A. Brandes; Robert Meneghini; Toshiaki Kozu

2003-08-01T23:59:59.000Z

420

Hydrographic and Current Observations on the Continental Slope and Shelf of the Western Equatorial Atlantic  

Science Conference Proceedings (OSTI)

Hydrographic and current-profiling data from December 1980 and current-meter data obtained between September 1980 and November 1981 from the continental slope and shelf of the western equatorial Atlantic between 2° and 7°N are used to describe ...

Charles N. Flagg; R. Lee Gordon; Scott McDowell

1986-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

The effects of slope limiting on asymptotic-preserving numerical methods for hyperbolic conservation laws  

Science Conference Proceedings (OSTI)

Many hyperbolic systems of equations with stiff relaxation terms reduce to a parabolic description when relaxation dominates. An asymptotic-preserving numerical method is a discretization of the hyperbolic system that becomes a valid discretization of ... Keywords: Asymptotic-preserving numerical methods, Discontinuous Galerkin, Slope limiters, Thermal radiative transfer

Ryan G. McClarren; Robert B. Lowrie

2008-12-01T23:59:59.000Z

422

Logisnet: A tool for multimethod, multiple soil layers slope stability analysis  

Science Conference Proceedings (OSTI)

Shallow landslides and slope failures have been studied from several points of view (inventory, heuristic, statistic, and deterministic). In particular, numerous methods embedded in Geographic Information Systems (GIS) applications have been developed ... Keywords: California, GIS, Landslides, Modeling, Multiple logistic regression, Redwood national and state parks, SINMAP

G. Legorreta Paulin; M. Bursik

2009-05-01T23:59:59.000Z

423

Alaskan N. Slope focus shifts from wildcats to cutting production costs  

SciTech Connect

North Slope operators are trying to hold the line against declining production with programs hit by lingering uncertainty over crude prices and taxes. The emphasis has shifted from last year's strong exploratory drilling campaign and high hopes fueled by the Kuvlum discovery to focus on more cost-efficient recovery of oil from producing fields. On the exploratory scene, the level of activity was low this past winter on the North Slope. Although Prudhoe Bay remains far out in front as the top producing field in the US, a field decline that began in 1989 continues. Overall, North Slope output declined in the first quarter but at a lower rate than Prudhoe Bay's. During the period, Prudhoe Bay, Kuparuk River, Endicott, Point McIntyre, and Milne Point together produced an average 1.64 million b/d, down 2.4% from last year. Horizontal wells and coiled tubing are an important part of the productivity of the Prudhoe Bay field. The paper discusses this technology, as well as the Gas Handling Expansion No.2 facility. The bright spot in the North Slope is the Point McIntyre field discovered in 1988. The paper gives some background and production figures for this field. Niakuk and Milne Point fields are also highlighted.

Not Available

1994-06-06T23:59:59.000Z

424

Fronts Formed by Obliquely Reflecting Internal Waves at a Sloping Boundary  

Science Conference Proceedings (OSTI)

A characteristic of internal waves reflecting from sloping boundaries is that they form fronts that travel with the component of the phase speed of the waves up the boundary. The strength of the fronts is assessed by estimating the magnitude of ...

S. A. Thorpe

1999-09-01T23:59:59.000Z

425

Obstacles, Slopes, and Tic-Tac-Toe: An excursion in discrete geometry and combinatorial game theory  

E-Print Network (OSTI)

A drawing of a graph is said to be a {\\em straight-line drawing} if the vertices of $G$ are represented by distinct points in the plane and every edge is represented by a straight-line segment connecting the corresponding pair of vertices and not passing through any other vertex of $G$. The minimum number of slopes in a straight-line drawing of $G$ is called the slope number of $G$. We show that every cubic graph can be drawn in the plane with straight-line edges using only the four basic slopes $\\{0,\\pi/4,\\pi/2,-\\pi/4\\}$. We also prove that four slopes have this property if and only if we can draw $K_4$ with them. Given a graph $G$, an {\\em obstacle representation} of $G$ is a set of points in the plane representing the vertices of $G$, together with a set of obstacles (connected polygons) such that two vertices of $G$ are joined by an edge if and only if the corresponding points can be connected by a segment which avoids all obstacles. The {\\em obstacle number} of $G$ is the minimum number of obstacles in a...

Mukkamala, V S Padmini

2011-01-01T23:59:59.000Z

426

A Model of Gulf Stream Frontal Instabilities, Meanders and Eddies along the Continental Slope  

Science Conference Proceedings (OSTI)

For a simplified model of the Gulf Stream front along a vertical-walled continental slope of a constant-depth ocean basin, the dynamics governing frontal instabilities, meanders, and eddies depend primarily on (i) L0/ R0, the ratio of the cross-...

Lie-Yauw Oey

1988-02-01T23:59:59.000Z

427

Some Two-Layer Models of the Shelf-Slope Front: Geostrophic Adjustment and its Maintenance  

Science Conference Proceedings (OSTI)

Two conceptual models of a two-layered frontal system are presented to study the wintertime shelf-slope front. The first model examines the geostrophic adjustment over a step topography after the fall overturning and applies only over short time ...

Hsien Wang Ou

1983-10-01T23:59:59.000Z

428

Construction of accurate geological cross-sections along trenches, cliffs and mountain slopes using photogrammetry  

Science Conference Proceedings (OSTI)

This paper discusses the application of close range photogrammetry for the construction of geological cross-sections from outcrops located on trenches, cliffs and mountain slopes. Our methodology is based on stereoscopic pairs of photographs of the outcrops ... Keywords: Geological cross-section, Photogeological interpretation, Photogrammetry, Stereoscopic pair, Structure from motion (SFM)

Santiago MartíN; Hodei Uzkeda; Josep Poblet; Mayte Bulnes; RamóN Rubio

2013-02-01T23:59:59.000Z

429

High-Resolution Numerical Modeling of Thermally Driven Slope Winds in a Valley with Strong Capping  

Science Conference Proceedings (OSTI)

The complete day–night cycle of the circulation over a slope under simplified idealized boundary conditions is investigated by means of large-eddy simulations (LES). The thermal forcing is given with a time-varying law for the surface ...

Franco Catalano; Antonio Cenedese

2010-09-01T23:59:59.000Z

430

SLOPE STABILITY EVALUATION AND EQUIPMENT SETBACK DISTANCES FOR BURIAL GROUND EXCAVATIONS  

Science Conference Proceedings (OSTI)

After 1970 Transuranic (TRU) and suspect TRU waste was buried in the ground with the intention that at some later date the waste would be retrieved and processed into a configuration for long term storage. To retrieve this waste the soil must be removed (excavated). Sloping the bank of the excavation is the method used to keep the excavation from collapsing and to provide protection for workers retrieving the waste. The purpose of this paper is to document the minimum distance (setback) that equipment must stay from the edge of the excavation to maintain a stable slope. This evaluation examines the equipment setback distance by dividing the equipment into two categories, (1) equipment used for excavation and (2) equipment used for retrieval. The section on excavation equipment will also discuss techniques used for excavation including the process of benching. Calculations 122633-C-004, 'Slope Stability Analysis' (Attachment A), and 300013-C-001, 'Crane Stability Analysis' (Attachment B), have been prepared to support this evaluation. As shown in the calculations the soil has the following properties: Unit weight 110 pounds per cubic foot; and Friction Angle (natural angle of repose) 38{sup o} or 1.28 horizontal to 1 vertical. Setback distances are measured from the top edge of the slope to the wheels/tracks of the vehicles and heavy equipment being utilized. The computer program utilized in the calculation uses the center of the wheel or track load for the analysis and this difference is accounted for in this evaluation.

MCSHANE DS

2010-03-25T23:59:59.000Z

431

The Breaking and Scattering of the Internal Tide on a Continental Slope  

Science Conference Proceedings (OSTI)

A strong internal tide is generated in the Luzon Strait that radiates westward to impact the continental shelf of the South China Sea. Mooring data in 1500-m depth on the continental slope show a fortnightly averaged incoming tidal flux of 12 kW m?...

Jody M. Klymak; Matthew H. Alford; Robert Pinkel; Ren-Chieh Lien; Yung Jang Yang; Tswen-Yung Tang

2011-05-01T23:59:59.000Z

432

Channel complex architecture of fine-grained submarine fans at the base-of-slope  

Science Conference Proceedings (OSTI)

The fan-valley or upper fan channel connects the submarine canyon on the outer shelf-upper slope to the basin proper. It is an erosionally-formed channel that is a conduit for sediment transported to the basin. The valley may widen where it enters the base-of-slope area. Most of the density flows are much smaller than the initial flow and therefore will not occupy the entire width of the upper fan channel. Smaller individual channels will be constructed resulting in a massive fill comprised of amalgamated sandstones. Sand-rich levees and overbank deposits flank each channel. Channel switching may take place toward locations with a slightly steeper gradient. These switches most likely result from irregular flow successions and different flow sizes. Erosion between successive channels is common, removing part of the channel fill and levee-overbank deposits. This results in a disorderly distribution of low-permeability barriers creating local obstruction to connectivity. A study of the sedimentological architecture of the updip mid-fan channel complex was conducted on cliff sections of the Permian Tanqua Karoo subbasin in South Africa, and in Big Rock Quarry in North Little Rock, Arkansas. Seismic records of the base-of-slope of the Mississippi Fan show a widening pattern, and of the Bryant Canyon Fan Complex south of the Sigsbee Escarpment the channel complexity. Integration of seismic data in outcrop observations improves our understanding of the complexity of many good reservoir sands, typically overlain by slope shales.

Bouma, A.H. [Louisiana State Univ., Baton Rouge, LA (United States); Gwang, H. [Kunsan National Univ. (Korea, Democratic People`s Republic of); Van Antwerepen, O. [Univ. of Port Elizabeth (South Africa)] [and others

1995-10-01T23:59:59.000Z

433

Observations of a Large-Amplitude Internal Wave Train and Its Reflection off a Steep Slope  

Science Conference Proceedings (OSTI)

Remote and in situ field observations documenting the reflection of a normally incident, short, and large-amplitude internal wave train off a steep slope are presented and interpreted with the help of the Dubreil–Jacotin–Long theory. Of the seven ...

Daniel Bourgault; David C. Janes; Peter S. Galbraith

2011-03-01T23:59:59.000Z

434

Investigation of Soil Erosion from Bare Steep Slopes of the Humid Tropic Philippines  

Science Conference Proceedings (OSTI)

At the Visayas State College of Agriculture (ViSCA) on the island of Leyte in the Philippines, hydrologic and soil-loss measurements were recorded for 32 erosion events over 3 yr on three 12-m-long bare soil plots with slopes of approximately 50%,...

A. L. Presbitero; C. W. Rose; B. Yu; C. A. A. Ciesiolka; K. J. Coughlan; B. Fentie

2005-05-01T23:59:59.000Z

435

Current Meter Observations on the Continental Slope at Two Sites in the Eastern Gulf of Mexico  

Science Conference Proceedings (OSTI)

Current-meter observations obtained at two sites on the continental slope of the eastern Gulf of Mexico, at nominal positions of 29°N, 88°W (the Mobile site) and 27.5°N, 85.5°W (the Tampa site) are presented. Data were collected at three levels ...

Robert L. Molinari; Dennis A. Mayer

1982-12-01T23:59:59.000Z

436

The Alternative Density Structures of Cold/Saltwater Pools on a Sloping Bottom: The Role of Friction  

Science Conference Proceedings (OSTI)

Observed density sections through dense-water pools or lenses on sloping topography typically have an asymmetric structure. One side of the dense lens usually is bounded by isopycnals that slope steeply down to the seabed while, on the other side,...

G. I. Shapiro; A. E. Hill

2003-02-01T23:59:59.000Z

437

Determination of the most probable slip surface in 3D slopes considering the effect of earthquake force direction  

Science Conference Proceedings (OSTI)

Considering the effect of earthquake forces on stability of slopes has always been of crucial importance in seismic analysis of geotechnical structures like dams, roads and embankments and there has been much concern about stability of cuts, fills and ... Keywords: 3D slopes, Earthquake force inclination, Stability analysis

A. Ahangar-Asr; M. M. Toufigh; A. Salajegheh

2012-08-01T23:59:59.000Z

438

A guidebook for insulated low-slope roof systems. IEA Annex 19, Low-slope roof systems: International Energy Agency Energy Conservation in Buildings and Community Systems Programme  

SciTech Connect

Low-slope roof systems are common on commercial and industrial buildings and, to a lesser extent, on residential buildings. Although insulating materials have nearly always been a component of low-slope roofs, the amount of insulation used has increased in the past two decades because of escalation of heating and cooling costs and increased awareness of the need for energy conservation. As the amount of insulation has increased, the demand has intensified for design, installation, and maintenance information specifically for well-insulated roofs. Existing practices for design, installation, and maintenance of insulated roofs have evolved from experience. Typically, these practices feature compromises due to the different properties of materials making up a given roof system. Therefore, they should be examined from time to time to ensure that they are appropriate as new materials continue to enter the market and as the data base on existing systems expands. A primary purpose of this International Energy Agency (IEA) study is to assess current roofing insulation practices in the context of an accumulating data base on performance.

Not Available

1994-02-01T23:59:59.000Z

439

Infrared Cloud Imager Deployment at the North Slope of Alaska During Early 2002  

NLE Websites -- All DOE Office Websites (Extended Search)

Infrared Cloud Imager Deployment Infrared Cloud Imager Deployment at the North Slope of Alaska During Early 2002 J. A. Shaw and B. Thurairajah Department of Electrical and Computer Engineering Montana State University Bozeman, Montana E. Edqvist National Oceanic and Atmospheric Administration Environmental Technology Laboratory Boulder, Colorado K. Mizutani Communications Research Laboratory Koganei, Tokyo, Japan Introduction Starting in February 2002, we deployed a new cloud-radiation sensor called the infrared cloud imager (ICI) at the North Slope of Alaska (NSA) site near Barrow, Alaska (71.32 N, 156.62 W). ICI records radiometrically calibrated images of the thermal infrared sky radiance in the 8µm to 14 µm wavelength band, from which spatial cloud statistics and spatially resolved cloud radiance can be determined.

440

Expansion of Facilities on the North Slope of Alaska in Time for the  

NLE Websites -- All DOE Office Websites (Extended Search)

Expansion of Facilities on the North Slope of Alaska in Time for the Expansion of Facilities on the North Slope of Alaska in Time for the International Polar Year Zak, Bernard Sandia National Laboratories Ivey, Mark Sandia National Laboratories Zirzow, Jeffrey Sandia National Laboratories Brower, Walter UIC Science Division ARM/NSA Ivanoff, James NSA Whiteman, Doug NSA/AAO Sassen, Kenneth University of Alaska Fairbanks Truffer-Moudra, Dana University of Alaska Fairbanks Category: Infrastructure & Outreach The International Polar Year (IPY; 2007-2008) will stimulate research in both polar regions, primarily focusing on the rapid climate-related changes occurring at high latitudes. In part in preparation for the IPY, facilities at the NSA ACRF are undergoing expansion. In addition, with funding through NOAA, Phase 1 of the planned $60M Barrow Global Climate Change Research

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Evaluation of Wax Deposition and its Control during Production of Alaska North Slope Oils  

Office of Scientific and Technical Information (OSTI)

Oil & Natural Gas Technology Oil & Natural Gas Technology DOE Award No.: DE-FC26-01NT41248 Evaluation of Wax Deposition and Its Control During Production of Alaska North Slope Oils Petroleum Development Laboratory Institute of Northern Engineering University of Alaska Fairbanks P.O. Box 755880 Fairbanks, Alaska 99775-5880 Prepared for: United States Department of Energy National Energy Technology Laboratory December 2008 Office of Fossil Energy Evaluation of Wax Deposition and Its Control During Production of Alaskan North Slope Oils Final Report Reporting Period: October 1, 2005-September 30, 2008 Principal Investigator: Tao Zhu University of Alaska Fairbanks P.O. Box 755880 Fairbanks, AK 99775-5880 fftz@uaf.edu, 907-474-5141 External Principal Investigator: Jack A. Walker

442

Mesoscale Characterization of Coupled Hydromechanical Behavior of a Fractured Porous Slope in Response to Free Water-Surface Movement  

Science Conference Proceedings (OSTI)

To better understand the role of groundwater-level changes on rock-slope deformation and damage, a carbonate rock slope (30 m x 30 m x 15 m) was extensively instrumented for mesoscale hydraulic and mechanical measurements during water-level changes. The slope is naturally drained by a spring that can be artificially closed or opened by a water gate. In this study, a 2-hour slope-dewatering experiment was analyzed. Changes in fluid pressure and deformation were simultaneously monitored, both at discontinuities and in the intact rock, using short-base extensometers and pressure gauges as well as tiltmeters fixed at the slope surface. Field data were analyzed with different coupled hydromechanical (HM) codes (ROCMAS, FLAC{sup 3D}, and UDEC). Field data indicate that in the faults, a 40 kPa pressure fall occurs in 2 minutes and induces a 0.5 to 31 x 10{sup -6} m normal closure. Pressure fall is slower in the bedding-planes, lasting 120 minutes with no normal deformation. No pressure change or deformation is observed in the intact rock. The slope surface displays a complex tilt towards the interior of the slope, with magnitudes ranging from 0.6 to 15 x 10{sup -6} rad. Close agreement with model for both slope surface and internal measurements is obtained when a high variability in slope-element properties is introduced into the models, with normal stiffnesses of k{sub n{_}faults} = 10{sup -3} x k{sub n{_}bedding-planes} and permeabilities of k{sub h{_}faults} = 10{sup 3} x k{sub h{_}bedding-planes}. A nonlinear correlation between hydraulic and mechanical discontinuity properties is proposed and related to discontinuity damage. A parametric study shows that 90% of slope deformation depends on HM effects in a few highly permeable and highly deformable discontinuities located in the basal, saturated part of the slope while the remaining 10% are related to elasto-plastic deformations in the low-permeability discontinuities induced by complex stress/strain transfers from the high-permeability zones. The periodicity and magnitude of free water-surface movements cause 10 to 20% variations in those local stress/strain accumulations related to the contrasting HM behavior for high and low-permeable elements of the slope. Finally, surface-tilt monitoring coupled with internal localized pressure/deformation measurements appears to be a promising method for characterizing the HM properties and behavior of a slope, and for detecting its progressive destabilization.

Rutqvist, Jonny; Guglielmi, Y.; Cappa, F.; Rutqvist, J.; Tsang, C.-F.; Thoraval, A.

2008-05-15T23:59:59.000Z

443

Natural gas hydrates of the Prudhoe Bay and Kuparuk River area, North Slope, Alaska  

SciTech Connect

Gas hydrates are crystalline substances composed of water and gas, mainly methane, in which a solid-water lattice accommodates gas molecules in a cage-like structure, or clathrate. These substances commonly have been regarded as a potential unconventional source of natural gas because of their enormous gas-storage capacity. Significant quantities of naturally occurring gas hydrates have been detected in many regions of the Arctic, including Siberia, the Mackenzie River Delta, and the North Slope of Alaska. On the North Slope, the methane-hydrate stability zone is a really extensive beneath most of the coastal plain province and has thicknesses greater than 1000 m in the Prudhoe Bay area. Gas hydrates have been inferred to occur in 50 North Slope exploratory and production wells on the basis of well-log responses calibrated to the response of an interval in a well where gas hydrates were recovered in a core by ARCO and Exxon. Most North Slope gas hydrates occur in six laterally continuous lower Tertiary sandstones and conglomerates; all these gas hydrates are geographically restricted to the area overlying the eastern part of the Kuparuk River oil field and the western part of the Prudhoe Bay oil field. The volume of gas within these gas hydrates is estimated to be about 1.0 [times] 10[sup 12] to 1.2 [times] 10[sup 12] m[sup 3] (37 to 44 tcf), or about twice the volume of conventional gas in the Prudhoe Bay field. 52 refs., 13 figs., 2 tabs.

Collett, T.S. (Geological Survey, Denver, CO (United States))

1993-05-01T23:59:59.000Z

444

Seismic analysis of the Par Pond Dam: Study of slope failure and liquefaction. Technical evaluation report  

SciTech Connect

Stability concerns of the Par Pond Dam, an embankment structure in the Savannah River Site complex, resulted in a comprehensive evaluation of the state of its integrity. Specifically, excessive seepage through the embankment, slope failure due to an earthquake event as well as liquefaction potential of the embankment and the foundation are addressed and the potential of failure is evaluated. Lastly, remedial benefits of the addition of a berm structure are also assessed.

Simos, N.; Reich, M.

1994-07-01T23:59:59.000Z

445

A Generalized Potential with Adjustable Slope: A Hydrostatic Alternative to Cluster Cooling Flows  

E-Print Network (OSTI)

I discuss a new gravitational potential, Phi(r) ~ (r_0^n+r^n)^(-1/n), for modeling the mass distribution of spherical systems. This potential has a finite mass and generates a density profile with adjustable inner slope 2-n. A gas embedded in this potential has hydrostatic temperature and gas density distributions that are elementary functions of n, greatly simplifying the task of measuring the slope from X-ray data. I show that this model is successful in describing the rising temperature profile and steep gas density profile often seen in cooling flow clusters. An application to the Abell 478 cluster of galaxies yields an inner slope 2-n = 1.0 +/- 0.2 (90%), consistent with the inner regions of collisionless dark matter halos first simulated by Navarro, Frenk, and White. The potential is also useful for cluster dynamics: it is a generalization of the familiar Hernquist and Plummer potentials, and because it is invertible, it allows for easy analytic calculation of particle phase space distribution functions in terms of n.

Andisheh Mahdavi

2002-12-12T23:59:59.000Z

446

The Wind-Driven Shelf and Slope Water Flow in Terms of a Local and a Remote Response  

Science Conference Proceedings (OSTI)

Clarke and Van Gorder suggest that many coastally trapped wave modes are needed to describe the wind-driven shelf and slope water alongshore velocity field. Calculations with an harmonic wind forcing confirm this and show that, for example, the ...

Manuel Lopez; Allan J. Clarke

1989-08-01T23:59:59.000Z

447

Downslope Flows on a Low-Angle Slope and Their Interactions with Valley Inversions. Part II: Numerical Modeling  

Science Conference Proceedings (OSTI)

The characteristics of well-developed downslope winds observed by tethered balloon soundings at multiple locations over a low-angle slope in the Salt Lake Valley are studied using the Regional Atmospheric Modeling System (RAMS). The model ...

Shiyuan Zhong; C. David Whiteman

2008-07-01T23:59:59.000Z

448

Ground-Based and Satellite-Derived Measurements of Surface Albedo on the North Slope of Alaska  

Science Conference Proceedings (OSTI)

Spatial and temporal variations of surface albedo on the North Slope of Alaska were investigated using both ground-based tower measurements and satellite remote sensing data. Ground-based measurements of incident and reflected solar radiation at ...

T. Zhang; T. Scambos; T. Haran; L. D. Hinzman; Roger G. Barry; D. L. Kane

2003-02-01T23:59:59.000Z

449

The Vertical Structure of the Wave Bottom Boundary Layer over a Sloping Bed: Theory and Field Measurements  

Science Conference Proceedings (OSTI)

Theoretical solutions for the wave bottom boundary layer (WBL) over a sloping bed are compared with field measurements in the nearshore zone. The WBL theory is constructed using both viscoelastic–diffusion and conventional eddy viscosity ...

Qingping Zou; Alex E. Hay

2003-07-01T23:59:59.000Z

450

Response of an Oceanic Bottom Boundary Layer on a Slope to Interior Flow. Part I: Time-Independent Interior Flow  

Science Conference Proceedings (OSTI)

The behavior of oceanic boundary layers on a sloping bottom in the presence of stratification is investigated by the method of direct numerical simulations. The Navier–Stokes equations are decomposed into mean and turbulent components with the ...

Dave Ramsden

1995-07-01T23:59:59.000Z

451

Effects of Atmospheric Thermal Stability and Slope Steepness on the Development of Daytime Thermally Induced Upslope Flow  

Science Conference Proceedings (OSTI)

The impact of background atmospheric thermal stability and slope steepness on the daytime thermally induced upslope flows was investigated using analytical and numerical model approaches. The study focuses on meso-? domains and considers the noon ...

Z. J. Ye; M. Segal; R. A. Pielke

1987-11-01T23:59:59.000Z

452

On Intermediate Models for Barotropic Continental Shelf and Slope Flow Fields. Part I: Formulation and Comparison of Exact Solutions  

Science Conference Proceedings (OSTI)

Motivated by the general objective of pursuing oceanographic process and data assimilation studies of the complex, nonlinear eddy and jet current fields observed over the continental shelf and slope off the west coast of the United States, we ...

J. S. Allen; J. A. Barth; P. A. Newberger

1990-07-01T23:59:59.000Z

453

The Behavior of Jet Currents over a Continental Slope Topography with a Possible Application to the Northern Current  

Science Conference Proceedings (OSTI)

The Northern Current is a slope current in the northwest Mediterranean that shows high mesoscale variability, generally associated with meander and eddy formation. A barotropic laboratory model of this current is used here to study the role of ...

M. M. Flexas; G. J. F. van Heijst; R. R. Trieling

2005-05-01T23:59:59.000Z

454

Evening Temperature Rises on Valley Floors and Slopes: Their Causes and Their Relationship to the Thermally Driven Wind System  

Science Conference Proceedings (OSTI)

At slope and valley floor sites in the Owens Valley of California, the late afternoon near-surface air temperature decline is often followed by a temporary temperature rise before the expected nighttime cooling resumes. The spatial and temporal ...

C. David Whiteman; Sebastian W. Hoch; Gregory S. Poulos

2009-04-01T23:59:59.000Z

455

Wind Field Climatology, Changes, and Extremes in the Chukchi–Beaufort Seas and Alaska North Slope during 1979–2009  

Science Conference Proceedings (OSTI)

Wind field climatology, changes, and extremes at ~32-km resolution were analyzed for the Chukchi–Beaufort Seas and Alaska North Slope region using 3-hourly North American Regional Reanalysis (NARR) from 1979 to 2009. The monthly average wind ...

Steve T. Stegall; Jing Zhang

2012-12-01T23:59:59.000Z

456

Coastal Upwelling: Onshore–Offshore Circulation, Equatorward Coastal Jet and Poleward Undercurrent over a Continental Shelf-Slope  

Science Conference Proceedings (OSTI)

The onshore-offshore circulation, equatorward coastal jet and poleward undercurrent associated with coastal upwelling are studied with numerical models. The model ocean has a continental shelf-slope uniform in the longshort direction and is ...

Nobuo Suginohara

1982-03-01T23:59:59.000Z

457

A Simple Model of the Formation and Maintenance of the Shelf/Slope Front in the Middle Atlantic Bight  

Science Conference Proceedings (OSTI)

The strong salinity and temperature gradients across the shelf/slope front in the Middle Atlantic Bight often compensate such that the cross-front density gradient is nearly eliminated. The suggests that the density field may not be as ...

David C. Chapman

1986-07-01T23:59:59.000Z

458

Slump dominated upper slope reservoir facies, Intra Qua Iboe (Pliocene), Edop Field, offshore Nigeria  

SciTech Connect

An integration of sedimentologic and 3D seismic data provides a basis for unraveling complex depositional processes and sand distribution of the Intra Qua Iboe (IQI) reservoir (Pliocene), Edop Field, offshore Nigeria. Nearly 3,000 feet of conventional core was examined in interpreting slump/slide/debris flow, bottom current, turbidity current, pelagic/hemipelagic, wave and tide dominated facies. The IQI was deposited on an upper slope in close proximity to the shelf edge. Through time, as the shelf edge migrated seaward, deposition began with a turbidite channel dominated slope system (IQI 1 and 2) and progressed through a slump/debris flow dominated slope system (IQI 3, the principal reservoir) to a tide and wave dominated, collapsed shelf-edge deltaic system (IQI 4). Using seismic time slices and corresponding depositional facies in the core, a sandy {open_quotes}fairway{open_quotes} has been delineated in the IQI 3. Because of differences in stacking patterns of sandy and muddy slump intervals, seismic facies show: (1) both sheet-like and mounded external forms (geometries), and (2) parallel/continuous as well as chaotic/hummocky internal reflections. In wireline logs, slump facies exhibits blocky, coarsening-up, fining-up, and serrated motifs. In the absence of conventional core, slump facies may be misinterpreted and even miscorrelated because seismic facies and log motifs of slumps and debris flows tend to mimic properties of turbidite fan deposits. The slump dominated reservoir facies is composed of unconsolidated fine-grained sand. Thickness of individual units varies from 1 to 34 feet, but amalgamated intervals reach a thickness of up to 70 feet and apparently form connected sand bodies. Porosity commonly ranges from 20 to 35%. Horizontal permeability commonly ranges from 1,000 to 3,000 md.

Shanmugam, G. [Mobil Research and Development Corp., Dallas, TX (United States); Hermance, W.E.; Olaifa, J.O. [Mobil Producing Nigeria, Lagos (Nigeria)

1995-08-01T23:59:59.000Z

459

The Component Slope Linear Model for Calculating Intensive Partial Molar Properties: Application to Waste Glasses  

SciTech Connect

Partial molar properties are the changes occurring when the fraction of one component is varied while the fractions of all other component mole fractions change proportionally. They have many practical and theoretical applications in chemical thermodynamics. Partial molar properties of chemical mixtures are difficult to measure because the component mole fractions must sum to one, so a change in fraction of one component must be offset with a change in one or more other components. Given that more than one component fraction is changing at a time, it is difficult to assign a change in measured response to a change in a single component. In this study, the Component Slope Linear Model (CSLM), a model previously published in the statistics literature, is shown to have coefficients that correspond to the intensive partial molar properties. If a measured property is plotted against the mole fraction of a component while keeping the proportions of all other components constant, the slope at any given point on a graph of this curve is the partial molar property for that constituent. Actually plotting this graph has been used to determine partial molar properties for many years. The CSLM directly includes this slope in a model that predicts properties as a function of the component mole fractions. This model is demonstrated by applying it to the constant pressure heat capacity data from the NaOH-NaAl(OH{sub 4}H{sub 2}O system, a system that simplifies Hanford nuclear waste. The partial molar properties of H{sub 2}O, NaOH, and NaAl(OH){sub 4} are determined. The equivalence of the CSLM and the graphical method is verified by comparing results detennined by the two methods. The CSLM model has been previously used to predict the liquidus temperature of spinel crystals precipitated from Hanford waste glass. Those model coefficients are re-interpreted here as the partial molar spinel liquidus temperature of the glass components.

Reynolds, Jacob G. [Washington River Protection Solutions, Richland, WA (United States)

2013-01-11T23:59:59.000Z

460

Benthic study of the continental slope off Cape Hatteras, North Carolina. Volume 3. Appendices  

SciTech Connect

The Point is an area that supports a most productive pelagic fishery, including tuna, swordfish, marlin, and more. The objective of the study is to analyze video tapes from near the Point, in order to provide data on epibenthic, megafaunal invertebrates including species composition, relative abundances, and large scale (1 km) distribution. The Point is not a defined spot on a chart. Although fishermen do use the steep shelf break for location, they generally look for the west wall of the Gulf Stream. The Point and the oil lease site coincidentally occur where the Gulf Stream parts the continental slope, just north of the eastern-most tip of Cape Hatteras.

Diaz, R.J.; Blake, J.A.; Lohse, D.P.

1993-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

The three loop slope of the Dirac form factor and the S Lamb shift in hydrogen  

DOE Green Energy (OSTI)

The last unknown contribution to hydrogen energy levels at order malpha{sup 7}, due to the slope of the Dirac form factor at three loops, is evaluated in a closed analytical form. The resulting shift of the hydrogen nS energy level is found to be 3.016/n{sup 3} kHz. Using the QED calculations of the 1S Lamb shift, the authors extract a precise value of the proton charge radius r{sub p} = 0.883{+-}0.014 fm.

Melnikov, K.

1999-12-08T23:59:59.000Z

462

STUDY OF TRANSPORTATION OF GTL PRODUCTS FROM ALASKAN NORTH SLOPE (ANS) TO MARKETS  

Science Conference Proceedings (OSTI)

The Alaskan North Slope is one of the largest hydrocarbon reserves in the US where Gas-to-Liquids (GTL) technology can be successfully implemented. The proven and recoverable reserves of conventional natural gas in the developed and undeveloped fields in the Alaskan North Slope (ANS) are estimated to be 38 trillion standard cubic feet (TCF) and estimates of additional undiscovered gas reserves in the Arctic field range from 64 TCF to 142 TCF. Transportation of the natural gas from the remote ANS is the key issue in effective utilization of this valuable and abundance resource. The throughput of oil through the Trans Alaska Pipeline System (TAPS) has been on decline and is expected to continue to decline in future. It is projected that by the year 2015, ANS crude oil production will decline to such a level that there will be a critical need for pumping additional liquid from GTL process to provide an adequate volume for economic operation of TAPS. The pumping of GTL products through TAPS will significantly increase its economic life. Transporting GTL products from the North Slope of Alaska down to the Marine terminal at Valdez is no doubt the great challenge facing the Gas to Liquids options of utilizing the abundant natural gas resource of the North Slope. The primary purpose of this study was to evaluate and assess the economic feasibility of transporting GTL products through the TAPS. Material testing program for GTL and GTL/Crude oil blends was designed and implemented for measurement of physical properties of GTL products. The measurement and evaluation of the properties of these materials were necessary so as to access the feasibility of transporting such materials through TAPS under cold arctic conditions. Results of the tests indicated a trend of increasing yield strength with increasing wax content. GTL samples exhibited high gel strengths at temperatures as high as 20 F, which makes it difficult for cold restart following winter shutdowns. Simplified analytical models were developed to study the flow of GTL and GTL/crude oil blends through TAPS in both commingled and batch flow models. The economics of GTL transportations by either commingled or batching mode were evaluated. The choice of mode of transportation of GTL products through TAPS would depend on the expected purity of the product and a trade-off between loss in product value due to contamination and cost of keeping the product pure at the discharge terminal.

Godwin A. Chukwu, Ph.D., P.E.

2002-09-01T23:59:59.000Z

463

NETL: News Release - Newly Installed Alaska North Slope Well Will Test  

NLE Websites -- All DOE Office Websites (Extended Search)

18, 2011 18, 2011 Newly Installed Alaska North Slope Well Will Test Innovative Hydrate Production Technologies Project Goals Include Injecting and Storing CO2 While Producing Methane Gas from Hydrate Washington, D.C. - A fully instrumented well that will test innovative technologies for producing methane gas from hydrate deposits has been safely installed on the North Slope of Alaska. As a result, the "Iġnik Sikumi" (Iñupiaq for "fire in the ice") gas hydrate field trial well will be available for field experiments as early as winter 2011-12. The well, the result of a partnership between ConocoPhillips and the Office of Fossil Energy's (FE) National Energy Technology Laboratory, will test a technology that involves injecting carbon dioxide (CO2) into sandstone reservoirs containing methane hydrate. Laboratory studies indicate that the CO2 molecules will replace the methane molecules within the solid hydrate lattice, resulting in the simultaneous sequestration of CO2 in a solid hydrate structure and production of methane gas.

464

Density slope of the nuclear symmetry energy from the neutron skin thickness of heavy nuclei  

E-Print Network (OSTI)

Expressing explicitly the parameters of the standard Skyrme interaction in terms of the macroscopic properties of asymmetric nuclear matter, we show in the Skyrme-Hartree-Fock approach that unambiguous correlations exist between observables of finite nuclei and nuclear matter properties. We find that existing data on neutron skin thickness Delta r(np) of Sn isotopes give an important constraint on the symmetry energy E(sym)(rho(0)) and its density slope L at saturation density rho(0). Combining these constraints with those from recent analyses of isospin diffusion and the double neutron/proton ratio in heavy-ion collisions at intermediate energies leads to a more stringent limit on L approximately independent of E(sym)(rho(0)). The implication of these new constraints on the Delta r(np) of (208)Pb as well as the core-crust transition density and pressure in neutron stars is discussed.

Chen, Lie-Wen; Ko, Che Ming; Li, Bao-An; Xu, Jun.

2010-01-01T23:59:59.000Z

465

Total Hadronic Cross Section and the Elastic Slope: An Almost Model-Independent Connection  

E-Print Network (OSTI)

An almost model-independent parametrization for the ratio of the total cross section to the elastic slope, as function of the center of mass energy, is introduced. The analytical result is based on the approximate relation of this quantity with the ratio $R$ of the elastic to total cross section and empirical fits to the $R$ data from proton-proton scattering above 10 GeV, under the conditions of asymptotic unitarity and the black-disk limit. This parametrization may be useful in studies of extensive air showers and the determination of the proton-proton total cross section from proton-air production cross section in cosmic-ray experiments.

D. A. Fagundes; M. J. Menon

2011-12-21T23:59:59.000Z

466

Physical and Chemical Implications of Mid-Winter Pumping of Trunda Lakes - North Slope, Alaska  

SciTech Connect

Tundra lakes on the North Slope, Alaska, are an important resource for energy development and petroleum field operations. A majority of exploration activities, pipeline maintenance, and restoration activities take place on winter ice roads that depend on water availability at key times of the winter operating season. These same lakes provide important fisheries and ecosystem functions. In particular, overwintering habitat for fish is one important management concern. This study focused on the evaluation of winter water use in the current field operating areas to provide a better understanding of the current water use practices. It found that under the current water use practices, there were no measurable negative effects of winter pumping on the lakes studied and current water use management practices were appropriately conservative. The study did find many areas where improvements in the understanding of tundra lake hydrology and water usage would benefit industry, management agencies, and the protection of fisheries and ecosystems.

Hinzman, Larry D. (University of Alaska Fairbanks, Water and Environmental Research Center); Lilly, Michael R. (Geo-Watersheds Scientific); Kane, Douglas L. (University of Alaska Fairbanks, Water and Environmental Research Center); Miller, D. Dan (University of Alaska Fairbanks, Water and Environmental Research Center); Galloway, Braden K. (University of Alaska Fairbanks, Water and Environmental Research Center); Hilton, Kristie M. (Geo-Watersheds Scientific); White, Daniel M. (University of Alaska Fairbanks, Water and Environmental Research Center)

2005-09-30T23:59:59.000Z

467

Laboratory measurements of the drying rates of low-slope roofing systems  

Science Conference Proceedings (OSTI)

The service life of a roofing system typically ends when excessive amounts of water have entered the system. Roofing professionals determine whether the existing failed roofing system can be repaired or salvaged by recovering. A key element in this decision is whether the accumulated water will be able to leave the roofing system in a time frame that will prevent irreparable structural damage. There are several combined heat and mass transfer models that can be used to predict drying times for low-slope roofing systems. Very little experimental data exists that can be used to validate the performance of these models. To satisfy these needs, a series of laboratory experiments has been performed. Five test panels, comprised of a plywood deck, four types of roofing insulation, and a single ply membrane were installed in a climate simulator. The test panels were outfitted with temperature sensors and heat flux transducers, and were mounted on load cells. Water was added to the test panels and they were subjected to external diurnal cycles representative of summer and winter conditions for a southern US continental climate. The load cells supplied continuous records of the weights of the test panels; these data were used to compute the drying rates of the test panels. When these experiments were completed, the test panels were ``recovered`` with different thicknesses of insulation and the environmental conditions were reapplied to the test panels. This paper reports on the design and performance of these experiments. The data compiled during these tests supply insight into the effects of meteorological conditions, insulation R-value, insulation water vapor permeance, and roof recover on the rate that water will be removed from low-slope roofing systems.

Desjarlais, A.O.; Kyle, D.M.; Childs, P.W.; Christian, J.E.

1994-05-01T23:59:59.000Z

468

UV Laser pulse temporal profile requirements for the LCLS injector. Part 1. Fourier transform limit for a temporal zero slope flattop  

E-Print Network (OSTI)

UV Laser pulse temporal profile requirements for the LCLS injector. Part 1. Fourier transform limit for a temporal zero slope flattop

Limborg-Deprey, C

2004-01-01T23:59:59.000Z

469

Constraints on the Repetitivity of the Orbit of an Altimetric Satellite: Estimation of the Cross-Track Slope  

Science Conference Proceedings (OSTI)

The effect of a poorly constrained repetitivity of the orbit of an altimetric satellite is analyzed. From existing data, 35% of the marine geoid slopes are found to excess 1.5 cm km?1. This may be due either to short-distance-scale features (...

J-F. Minster; F. Rémy; E. Normant

1993-06-01T23:59:59.000Z

470

Simulation Studies on a Multi-stage Distillation with Slope-Plate Falling Film Evaporation Desalination System Using Solar Energy  

Science Conference Proceedings (OSTI)

An innovative, multi-stage solar distillation with slope-plate falling film system for seawater desalination is investigated. The system consists of a solar heater (flat plate solar collector) and one evaporation-condensation set that is composed of ... Keywords: solar energy, falling film, desalination

Penghui Gao; Guoqing Zhou; Henglin Lv

2009-10-01T23:59:59.000Z

471

A single-slope 80MS/s ADC using two-step time-to-digital conversion  

E-Print Network (OSTI)

An 80 MS/s analog-to-digital converter (ADC) based on single-slope conversion is presented which utilizes a recently developed gated ring oscillator (GRO) time-to-digital converter (TDC) to achieve an ENOB of 6.45 bits. ...

Park, Min

472

Downslope Flows on a Low-Angle Slope and Their Interactions with Valley Inversions. Part I: Observations  

Science Conference Proceedings (OSTI)

Thermally driven downslope flows were investigated on a low-angle (1.6°) slope on the west side of the floor of Utah’s Salt Lake Valley below the Oquirrh Mountains using data from a line of four tethered balloons running down the topographic ...

C. David Whiteman; Shiyuan Zhong

2008-07-01T23:59:59.000Z

473

Gravity current down a steeply inclined slope in a rotating fluid G. I. Shapiro, A. G. Zatsepin  

E-Print Network (OSTI)

Gravity current down a steeply inclined slope in a rotating fluid G. I. Shapiro, A. G. Zatsepin P filled with water of constant density. A bottom gravity current was produced by injecting more dense was developed for a strongly non-linear gravity current forming a near-bottom density front. The theory takes

Paris-Sud XI, Université de

474

Multi-Gaussian Representation of the Cox–Munk Distribution for Slopes of Wind-Driven Waves  

Science Conference Proceedings (OSTI)

The Cox–Munk probability density function (PDF) for slopes (?x, ?y) of wind-driven ocean waves was obtained about 50 years ago and until now has remained the most complete result. This PDF is widely used in different applications. With respect to ...

Valerian I. Tatarskii

2003-11-01T23:59:59.000Z

475

Development of fly ash-based slope protection materials for waste disposal ponds. Topical report, Task 7.7  

Science Conference Proceedings (OSTI)

A research project was conducted to develop a cost-effective slope protection material for a 100-acre scrubber sludge disposal pond located at the Sherco power plant. The technical objective of the project was to formulate and evaluate the performance of a slope protection material produced using self-cementing coal combustion by-products. The material was to have sufficient durability and erosion resistance to protect the underlying bottom ash fill and clay liner from wave erosion for at least 5 years when it was placed on the interior side slopes of the pond. The two coal combustion by-products that were considered for use in the slope protection material were 1) a spray dryer waste and 2) a subbituminous coal fly ash. The spray dryer waste was approximately a 50:50 mixture of subbituminous coal fly ash and reacted, lime-based scrubber sorbent. The subbituminous coal fly ash was produced from a cyclone-fired boiler. Both by-products displayed self-cementing behavior when mixed with water. The results of the field tests indicated that a slope protection slab prepared from Sherco spray dryer waste placed with a 20% moisture content showed almost no deterioration after 20 months in the field. A slab prepared from a mixture of 25% Riverside fly ash and 75% bottom ash with a moisture content of 18% showed a slight loss of material from the surface of the slab, but no substantial deterioration after 20 months in the field. Two other materials containing Riverside fly ash that were prepared with higher moisture contents showed somewhat more deterioration after 20 months, although none of the field test slabs appeared to have failed in that time period.

Moretti, C.J.

1993-02-01T23:59:59.000Z

476

Steep-Slope Assembly Testing of Clay and Concrete Tile With and Without Cool Pigmented Colors  

Science Conference Proceedings (OSTI)

Cool color pigments and sub-tile venting of clay and concrete tile roofs significantly impact the heat flow crossing the roof deck of a steep-slope roof. Field measures for the tile roofs revealed a 70% drop in the peak heat flow crossing the deck as compared to a direct-nailed asphalt shingle roof. The Tile Roofing Institute (TRI) and its affiliate members are keenly interested in documenting the magnitude of the drop for obtaining solar reflectance credits with state and federal "cool roof" building efficiency standards. Tile roofs are direct-nailed or are attached to a deck with batten or batten and counter-batten construction. S-Misson clay and concrete tile roofs, a medium-profile concrete tile roof, and a flat slate tile roof were installed on fully nstrumented attic test assemblies. Temperature measures of the roof, deck, attic, and ceiling, heat flows, solar reflectance, thermal emittance, and the ambient weather were recorded for each of the tile roofs and also on an adjacent attic cavity covered with a conventional pigmented and directnailed asphalt shingle roof. ORNL measured the tile's underside temperature and the bulk air temperature and heat flows just underneath the tile for batten and counter-batten tile systems and compared the results to the conventional asphalt shingle.

Miller, William A [ORNL

2005-11-01T23:59:59.000Z

477

Development geology of giant fields on Alaskan North Slope: Key to successful reservoir management  

SciTech Connect

The giant fields on the North Slope of Alaska (combined Permian-Triassic/Lisburne pools at Prudhoe Bay and the Kuparuk River field) produce approximately 2 million BOPD and contain about 30 billion bbl of oil in place. This production rate amounts to almost one-fourth of the US daily production. Because the reservoirs in these fields are complex and the stakes in efficient field management so high, the development geology of these fields presents a great challenge. The technical challenge of managing these fields lies in the fact that secondary and tertiary recovery projects have been initiated soon after start-up to ensure maximum recovery. Thus, the development geologist has to recommend primary development locations while formulating a reservoir description without knowing the full areal extent and heterogeneity of the reservoirs. To support the waterflood and enhanced oil recovery projects, permeability pathways and barriers have been identified using sedimentological, log, and engineering data. Because structure also plays an important role in controlling fluid pathways, the fault geometries, fracture patterns, and detailed structure are being mapped using two-dimensional and three-dimensional seismic, well, and log data. The management challenge of development work in these fields is keeping communications channels open among the development geoscience group and the reservoir, production, operations, and drilling engineers.

Kumar, N. (ARCO Alaska, Inc., Anchorage (USA))

1988-12-01T23:59:59.000Z

478

Material management: experience on the Alaska North Slope Project. [Kuparuk River Project  

SciTech Connect

The Kuparuk River Unit Project started in 1978, with the first major production facility sea lifted to the construction site on the North Slope of Alaska in the summer of 1981. The oil production field is located approximately 25 miles west of the Prudhoe Bay facility and 250 miles north of the Arctic Circle. The size of the Kuparuk site is 215 square miles, overlaying a projected recoverable reservoir of 1.2 billion barrels of oil. The present plan calls for approximately 50 drillsite pads, with the possibility of up to 32 wells on each pad. Modular construction was the most cost-effective method to use. The need for intensive material management on the Kuparuk River Unit Project became evident as the scope of engineering effort increased, shortening the amount of time available for acquisition of purchased materials and for the construction of the modules to meet the annual six-week sea-lift delivery period. The logistics of the Kuparuk construction site, the timeframe required to do the modular construction, the support facilities necessary, and several contractors and types of contracts, required Stearns Catalytic Corporation to consider a sophisticated material control system to identify the various areas of concern. The computerized system set up to solve the problems is discussed here generically.

Humphreys, R.B.

1985-08-01T23:59:59.000Z

479

Airblast and ground vibration generation and propagation from contour mine blasting. Report of investigations/1984  

SciTech Connect

The Bureau of Mines studied airblast and ground vibrations produced by surface coal mine blasting in Appalachia to determine the topographic or other region-specific effects on generation and propagation. Arrays of seismographs were used to measure blast effects in both rolling-terrain and steep-slope contour coal mining areas. Comparisons were then made with previous blasting data from studies of midwest coal mines located in flat areas.

Stachura, V.J.; Siskind, D.E.; Kopp, J.W.

1984-01-01T23:59:59.000Z

480

Evaluation of Wax Deposition and Its Control During Production of Alaska North Slope Oils  

Science Conference Proceedings (OSTI)

Due to increasing oil demand, oil companies are moving into arctic environments and deep-water areas for oil production. In these regions of lower temperatures, wax deposits begin to form when the temperature in the wellbore falls below wax appearance temperature (WAT). This condition leads to reduced production rates and larger pressure drops. Wax problems in production wells are very costly due to production down time for removal of wax. Therefore, it is necessary to develop a solution to wax deposition. In order to develop a solution to wax deposition, it is essential to characterize the crude oil and study phase behavior properties. The main objective of this project was to characterize Alaskan North Slope crude oil and study the phase behavior, which was further used to develop a dynamic wax deposition model. This report summarizes the results of the various experimental studies. The subtasks completed during this study include measurement of density, molecular weight, viscosity, pour point, wax appearance temperature, wax content, rate of wax deposition using cold finger, compositional characterization of crude oil and wax obtained from wax content, gas-oil ratio, and phase behavior experiments including constant composition expansion and differential liberation. Also, included in this report is the development of a thermodynamic model to predict wax precipitation. From the experimental study of wax appearance temperature, it was found that wax can start to precipitate at temperatures as high as 40.6 C. The WAT obtained from cross-polar microscopy and viscometry was compared, and it was discovered that WAT from viscometry is overestimated. From the pour point experiment it was found that crude oil can cease to flow at a temperature of 12 C. From the experimental results of wax content, it is evident that the wax content in Alaskan North Slope crude oil can be as high as 28.57%. The highest gas-oil ratio for a live oil sample was observed to be 619.26 SCF/STB. The bubblepoint pressure for live oil samples varied between 1600 psi and 2100 psi. Wax precipitation is one of the most important phenomena in wax deposition and, hence, needs to be modeled. There are various models present in the literature. Won's model, which considers the wax phase as a non-ideal solution, and Pedersen's model, which considers the wax phase as an ideal solution, were compared. Comparison indicated that Pedersen's model gives better results, but the assumption of wax phase as an ideal solution is not realistic. Hence, Won's model was modified to consider different precipitation characteristics of the various constituents in the hydrocarbon fraction. The results obtained from the modified Won's model were compared with existing models, and it was found that predictions from the modified model are encouraging.

Tao Zhu; Jack A. Walker; J. Liang

2008-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "terrain slope terrain" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Assessment of Alaska's North Slope Oil Field Capacity to Sequester CO{sub 2}  

Science Conference Proceedings (OSTI)

The capacity of 21 major fields containing more than 95% of the North Slope of Alaska's oil were investigated for CO{sub 2} storage by injecting CO{sub 2} as an enhanced oil recovery (EOR) agent. These fields meet the criteria for the application of miscible and immiscible CO{sub 2}-EOR methods and contain about 40 billion barrels of oil after primary and secondary recovery. Volumetric calculations from this study indicate that these fields have a static storage capacity of 3 billion metric tons of CO{sub 2}, assuming 100% oil recovery, re-pressurizing the fields to pre-fracturing pressure and applying a 50% capacity reduction to compensate for heterogeneity and for water invasion from the underlying aquifer. A ranking produced from this study, mainly controlled by field size and fracture gradient, identifies Prudhoe, Kuparuk, and West Sak as possessing the largest storage capacities under a 20% safety factor on pressures applied during storage to avoid over-pressurization, fracturing, and gas leakage. Simulation studies were conducted using CO{sub 2} Prophet to determine the amount of oil technically recoverable and CO{sub 2} gas storage possible during this process. Fields were categorized as miscible, partially miscible, and immiscible based on the miscibility of CO{sub 2} with their oil. Seven sample fields were selected across these categories for simulation studies comparing pure CO{sub 2} and water-alternating-gas injection. Results showed that the top two fields in each category for recovery and CO{sub 2} storage were Alpine and Point McIntyre (miscible), Prudhoe and Kuparuk (partially miscible), and West Sak and Lisburne (immiscible). The study concludes that 5 billion metric tons of CO{sub 2} can be stored while recovering 14.2 billion barrels of the remaining oil.

Umekwe, Pascal, E-mail: wpascals@gmail.com [Baker Hughes (United States)] [Baker Hughes (United States); Mongrain, Joanna, E-mail: Joanna.Mongrain@shell.com [Shell International Exploration and Production Co (United States)] [Shell International Exploration and Production Co (United States); Ahmadi, Mohabbat, E-mail: mahmadi@alaska.edu [University of Alaska Fairbanks, Petroleum Engineering Department (United States)] [University of Alaska Fairbanks, Petroleum Engineering Department (United States); Hanks, Catherine, E-mail: chanks@gi.alaska.edu [University of Alaska Fairbanks, Geophysical Institute (United States)] [University of Alaska Fairbanks, Geophysical Institute (United States)

2013-03-15T23:59:59.000Z

482

MITAS-2009 Expedition, U.S. Beaufort Shelf and Slope—Lithostratigraphy Data Report  

SciTech Connect

The volume of methane released through the Arctic Ocean to the atmosphere and its potential role in the global climate cycle have increasingly become the focus of studies seeking to understand the source and origin of this methane. In 2009, an international, multi-disciplinary science party aboard the U.S. Coast Guard icebreaker Polar Sea successfully completed a trans-U.S. Beaufort Shelf expedition aimed at understanding the sources and volumes of methane across this region. Following more than a year of preliminary cruise planning and a thorough site evaluation, the Methane in the Arctic Shelf/Slope (MITAS) expedition departed from the waters off the coast of Barrow, Alaska in September 2009. The expedition was organized with an international shipboard science team consisting of 33 scientists with the breadth of expertise necessary to meet the expedition goals. NETL researchers led the expedition’s initial core processing and lithostratigraphic evaluations, which are the focus of this report. This data report is focused on the lithostratigraphic datasets from the recovered vibra cores and piston cores. Operational information about the piston and vibra cores such as date acquired, core name, total length, water depth, and geographic location is provided. Once recovered, gas samples were immediately collected from cores. In addition, each core was run through the Geotek multi-sensor core logger for magnetic susceptibility, P-wave velocity, resistivity, and gamma-density measurements (Rose et al., 2010). After the samples and measurements were completed, the cores were split into working and archive halves. Visual core descriptions of the archive half was completed for each core. Samples for shipboard smear slides, coarse fractions, and XRD analyses were collected, as well as corresponding samples for post-cruise grain size analysis from the working half of each core. Line scan images of the split core surfaces were collected post-expedition. The methods used to characterize the lithostratigraphy of the recovered cores are described.

Rose, K.; Johnson, J.E.; Phillips, S.C.; Smith, J.; Reed, A.; Disenhof, C.; Presley, J.

2012-09-17T23:59:59.000Z

483

Cálculo de campo electromagnético producido por rayo para terreno no plano y su efecto en las tensiones inducidas en líneas de distribución / Electromagnetic field calculation produced by lightning in non flat terrain and its the effect on the lightning induced voltages on distribution networks.  

E-Print Network (OSTI)

??Soto Ríos, Edison Andrés (2010) Cálculo de campo electromagnético producido por rayo para terreno no plano y su efecto en las tensiones inducidas en líneas… (more)

Soto Ríos, Edison Andrés

2010-01-01T23:59:59.000Z

484

Variation of Solar Attenuation with Height in CAPLTER The atmosphere over rural and urbanized areas differs in many ways in relation to terrain influences and human-induced variations (e.g., heat, humidity, wind, and pollution). The sun's energy penetrate  

E-Print Network (OSTI)

on amounts of solar energy that are accumulated at any given time. These controls range from extraterrestrial of variability cascade into plant productivity, solar energy technology, and urban climate processes, in generalVariation of Solar Attenuation with Height in CAPLTER Abstract The atmosphere over rural

Hall, Sharon J.

485

Geologic interrelations relative to gas hydrates within the North Slope of Alaska: Task No. 6, Final report  

SciTech Connect

The five primary objectives of the US Geological Survey North Slope Gas Hydrate Project were to: (1) Determine possible geologic controls on the occurrence of gas hydrate; (2) locate and evaluate possible gas-hydrate-bearing reservoirs; (3) estimate the volume of gas within the hydrates; (4) develop a model for gas-hydrate formation; and (5) select a coring site for gas-hydrate sampling and analysis. Our studies of the North Slope of Alaska suggest that the zone in which gas hydrates are stable is controlled primarily by subsurface temperatures and gas chemistry. Other factors, such as pore-pressure variations, pore-fluid salinity, and reservior-rock grain size, appear to have little effect on gas hydrate stability on the North Slope. Data necessary to determine the limits of gas hydrate stability field are difficult to obtain. On the basis of mud-log gas chromatography, core data, and cuttings data, methane is the dominant species of gas in the near-surface (0--1500 m) sediment. Gas hydrates were identified in 34 wells utilizing well-log responses calibrated to the response of an interval in one well where gas hydrates were actually recovered in a core by an oil company. A possible scenario describing the origin of the interred gas hydrates on the North Slope involves the migration of thermogenic solution- and free-gas from deeper reservoirs upward along faults into the overlying sedimentary rocks. We have identified two (dedicated) core-hole sites, the Eileen and the South-End core-holes, at which there is a high probability of recovering a sample of gas hydrate. At the Eileen core-hole site, at least three stratigraphic units may contain gas hydrate. The South-End core-hole site provides an opportunity to study one specific rock unit that appears to contain both gas hydrate and oil. 100 refs., 72 figs., 24 tabs.

Collett, T.S.; Bird, K.J.; Kvenvolden, K.A.; Magoon, L.B.

1988-01-01T23:59:59.000Z

486

The sedimentological and geotechnical characteristics of the lower continental slope and rise of the Mississippi Fan fold belt  

E-Print Network (OSTI)

The study is based on geological and geotechnical laboratory testing data of 70 three inch diameter piston cores. Concentration is along the Sigsbee Escarpment in a grid area between 90? and 91?W and 26.7? and 27.3?N. Water depth ranges from 1,200 meters below sea level to 2,500 meters below sea level. All data were used to characterize the seafloor processes that deposited these sediments. The Sigsbee Escarpment represents a complex topographic and geologic feature involving faults, slumps and steep slopes. Most of the study area is covered by hemipelagic Holocene sediments in 0.05 to 2.9 m thickness, greatest thickness being in bathymetric lows indicating that Holocene sediments are eroded at the bathymetric highs and transported down the slope. The underlying Pleistocene sediments are mostly laminated clays in the southwestern part of the study area, indicating no mass wasting. Hemipelagic sedimentation in quiet sea bottom environment was dominant throughout the accumulation of the unit. Several generations of slumps have occurred in the northeastern part of the Sigsbee Escarpment during the Pleistocene showing that this part of the study area is an area where active mass wasting and down slope processes dominate.

Ramazanova, Rahila

2001-01-01T23:59:59.000Z

487

Sensitivity of Low Sloped Roofs Designs to Initial Water and Air Leakage  

E-Print Network (OSTI)

Liquid water in low sloped roofs almost always causes problems. Roofs are designed only to control the migration of vapor, if at all. Small amounts of water leakage/penetration, may cause mold growth or catastrophic corrosion in current roofs systems. In a recent paper by the authors the effect of exterior surface emissive and absorptive properties was found to have a significant effect on the moisture performance of a roof that had a leak. Depending on the surface characteristics, roof systems can be designed to effectively manage water penetration, but at an energy cost. In the roofs system examined previously, air leakage was not included. In the present study, the authors reinvestigated the effect of water penetration and the influence of air leakage on the hygrothermal performance of a few selected roofs. The drying potential of a groove ventilated roof is examined. The performance concept is based on the fact that warming up of air in the groove increases it's ability to transport moisture to the outside. Solar radiation raises the temperature of air in the grooves and on average, during a sunny summer day 0.5 L of water can be ventilated out of the roof per 1m width of the roof. In this paper, one climatic condition was investigated; a hot and humid Climate representative of Houston, TX. The specific questions that the paper addresses are: What are the vapor and liquid control dynamic involved in the moisture migration of a roof in Houston TX? and how does airflow influence the performance of a roof that is initially wet ? A state-of-the-art numerical model was used to address these issues. Results showed that the drying potential depends on the ventilation rates. The roof system with ventilation grooves dried out faster from the initially wet stage than the roof without the ventilation grooves. The total increase in heat loss of the roof was found to be between 0 - 5 % depending on the thickness of the insulation. The ventilation can cool down the temperature of the roof in the middle of a hot and sunny day thus reducing the heat load to the inside.

Karagiozis, A.; Desjarlais, A.; Salonvaara, M.

2002-01-01T23:59:59.000Z

488

Chemical and Microbial Characterization of North Slope Viscous Oils to Assess Viscosity Reduction and Enhanced Recovery  

SciTech Connect

A large proportion of Alaska North Slope (ANS) oil exists in the form of viscous deposits, which cannot be produced entirely using conventional methods. Microbially enhanced oil recovery (MEOR) is a promising approach for improving oil recovery for viscous deposits. MEOR can be achieved using either ex situ approaches such as flooding with microbial biosurfactants or injection of exogenous surfactant-producing microbes into the reservoir, or by in situ approaches such as biostimulation of indigenous surfactant-producing microbes in the oil. Experimental work was performed to analyze the potential application of MEOR to the ANS oil fields through both ex situ and in situ approaches. A microbial formulation containing a known biosurfactant-producing strain of Bacillus licheniformis was developed in order to simulate MEOR. Coreflooding experiments were performed to simulate MEOR and quantify the incremental oil recovery. Properties like viscosity, density, and chemical composition of oil were monitored to propose a mechanism for oil recovery. The microbial formulation significantly increased incremental oil recovery, and molecular biological analyses indicated that the strain survived during the shut-in period. The indigenous microflora of ANS heavy oils was investigated to characterize the microbial communities and test for surfactant producers that are potentially useful for biostimulation. Bacteria that reduce the surface tension of aqueous media were isolated from one of the five ANS oils (Milne Point) and from rock oiled by the Exxon Valdez oil spill (EVOS), and may prove valuable for ex situ MEOR strategies. The total bacterial community composition of the six different oils was evaluated using molecular genetic tools, which revealed that each oil tested possessed a unique fingerprint indicating a diverse bacterial community and varied assemblages. Collectively we have demonstrated that there is potential for in situ and ex situ MEOR of ANS oils. Future work should focus on lab and field-scale testing of ex situ MEOR using Bacillus licheniformis as well as the biosurfactant-producing strains we have newly isolated from the Milne Point reservoir and the EVOS environment.

Shirish Patil; Abhijit Dandekar; Mary Beth Leigh

2008-12-31T23:59:59.000Z

489

The Response of the SSM/I to the Marine Environment. Part II: A Parameterization of the Effect of the Sea Surface Slope Distribution on Emission and Reflection  

Science Conference Proceedings (OSTI)

Based on a geometric optics model and the assumption of an isotropic Gaussian surface slope distribution, the component of ocean surface microwave emissivity variation due to large-scale surface roughness is parameterized for the frequencies and ...

Grant W. Petty; Kristina B. Katsaros

1994-06-01T23:59:59.000Z

490

Analysis of Radiosonde and Ground-Based Remotely Sensed PWV Data from the 2004 North Slope of Alaska Arctic Winter Radiometric Experiment  

Science Conference Proceedings (OSTI)

During 9 March–9 April 2004, the North Slope of Alaska Arctic Winter Radiometric Experiment was conducted at the Atmospheric Radiation Measurement Program’s (ARM) “Great White” field site near Barrow, Alaska. The major goals of the experiment ...

V. Mattioli; E. R. Westwater; D. Cimini; J. C. Liljegren; B. M. Lesht; S. I. Gutman; F. J. Schmidlin

2007-03-01T23:59:59.000Z

491

On Intermediate Models for Barotropic Continental Shelf and Slope Flow Fields. Part II: Comparison of Numerical Model Solutions in Doubly Periodic Domains  

Science Conference Proceedings (OSTI)

As part of a program to improve understanding of the dynamics of the complicated, vigorous eddy and jet flow fields recently observed over the continental shelf and slope, we investigate the potential of intermediate models for use in both ...

J. A. Barth; J. S. Allen; P. A. Newberger

1990-07-01T23:59:59.000Z

492

Improving single slope ADC and an example implemented in FPGA with 16.7 GHz equivalent counter clook frequency  

SciTech Connect

Single slope ADC is a common building block in many ASCI or FPGA based front-end systems due to its simplicity, small silicon footprint, low noise interference and low power consumption. In single slope ADC, using a Gray code counter is a popular scheme for time digitization, in which the comparator output drives the clock (CK) port of a register to latch the bits from the Gray code counter. Unfortunately, feeding the comparator output into the CK-port causes unnecessary complexities and artificial challenges. In this case, the propagation delays of all bits from the counter to the register inputs must be matched and the counter must be a Gray code one. A simple improvement on the circuit topology, i.e., feeding the comparator output into the D-port of a register, will avoid these unnecessary challenges, eliminating the requirement of the propagation delay match of the counter bits and allowing the use of regular binary counters. This scheme not only simplifies current designs for low speeds and resolutions, but also opens possibilities for applications requiring higher speeds and resolutions. A multi-channel single slope ADC based on a low-cost FPGA device has been implemented and tested. The timing measurement bin width in this work is 60 ps, which would need a 16.7 GHz counter clock had it implemented with the conventional Gray code counter scheme. A 12-bit performance is achieved using a fully differential circuit making comparison between the input and the ramping reference, both in differential format.

Wu, Jinyuan; /Fermilab; Odeghe, John; /South Carolina State U.; Stackley, Scott; /Boston U.; Zha, Charles; /Rice U.

2011-11-01T23:59:59.000Z

493

The component slope linear model for calculating intensive partial molar properties /application to waste glasses and aluminate solutions  

SciTech Connect

Partial molar properties are the changes occurring when the fraction of one component is varied while the fractions of all other component mole fractions change proportionally. They have many practical and theoretical applications in chemical thermodynamics. Partial molar properties of chemical mixtures are difficult to measure because the component mole fractions must sum to one, so a change in fraction of one component must be offset with a change in one or more other components. Given that more than one component fraction is changing at a time, it is difficult to assign a change in measured response to a change in a single component. In this study, the Component Slope Linear Model (CSLM), a model previously published in the statistics literature, is shown to have coefficients that correspond to the intensive partial molar properties. If a measured property is plotted against the mole fraction of a component while keeping the proportions of all other components constant, the slope at any given point on a graph of this curve is the partial molar property for that constituent. Actually plotting this graph has been used to determine partial molar properties for many years. The CSLM directly includes this slope in a model that predicts properties as a function of the component mole fractions. This model is demonstrated by applying it to the constant pressure heat capacity data from the NaOH-NaAl(OH){sub 4}-H{sub 2}O system, a system that simplifies Hanford nuclear waste. The partial molar properties of H{sub 2}O, NaOH, and NaAl(OH){sub 4} are determined. The equivalence of the CSLM and the graphical method is verified by comparing results determined by the two methods. The CSLM model has been previously used to predict the liquidus temperature of spinel crystals precipitated from Hanford waste glass. Those model coefficients are re-interpreted here as the partial molar spinel liquidus temperature of the glass components.

Reynolds, Jacob G. [Washington River Protection Solutions, LLC, Richland, WA (United States)

2013-01-11T23:59:59.000Z

494

SOLVENT-BASED ENHANCED OIL RECOVERY PROCESSES TO DEVELOP WEST SAK ALASKA NORTH SLOPE HEAVY OIL RESOURCES  

SciTech Connect

A one-year research program is conducted to evaluate the feasibility of applying solvent-based enhanced oil recovery processes to develop West Sak and Ugnu heavy oil resources found on the Alaska North Slope (ANS). The project objective is to conduct research to develop technology to produce and market the 300-3000 cp oil in the West Sak and Ugnu sands. During the first phase of the research, background information was collected, and experimental and numerical studies of vapor extraction process (VAPEX) in West Sak and Ugnu are conducted. The experimental study is designed to foster understanding of the processes governing vapor chamber formation and growth, and to optimize oil recovery. A specially designed core-holder and a computed tomography (CT) scanner was used to measure the in-situ distribution of phases. Numerical simulation study of VAPEX was initiated during the first year. The numerical work completed during this period includes setting up a numerical model and using the analog data to simulate lab experiments of the VAPEX process. The goal was to understand the mechanisms governing the VAPEX process. Additional work is recommended to expand the VAPEX numerical study using actual field data obtained from Alaska North Slope.

David O. Ogbe; Tao Zhu

2004-01-01T23:59:59.000Z

495

Field Study of Exhaust Fans for Mitigating Indoor Air Quality Problems: Final Report to Bonneville Power Administration  

E-Print Network (OSTI)

terrain class (1-5)[dflt=3J";TCL 'Input terrain class atsite. IF TCL=0 THEN TCL=3 INPUT "Are you going to use wind data froM the

Grimsrud, David T.

2009-01-01T23:59:59.000Z

496

A Two-Stage Quality Control Method for 2-m Temperature Observations Using Biweight Means and a Progressive EOF Analysis  

Science Conference Proceedings (OSTI)

The relatively smooth terrain embedded in the numerical model creates an elevation difference against the actual terrain, which in turn makes the quality control of 2-m temperature difficult when forecast or analysis fields are utilized in the ...

Zhifang Xu; Yi Wang; Guangzhou Fan

2013-02-01T23:59:59.000Z

497

Topography and Radiation Exchange of a Mountainous Watershed  

Science Conference Proceedings (OSTI)

This report deals with the radiation exchange of a complex terrain. A relatively simple network for computing topographic parameters global radiation, and net radiation of a mountainous terrain was developed and applied to a forested Appalachian ...

Hailiang Fu; Stanislaw J. Tajchman; James N. Kochenderfer

1995-04-01T23:59:59.000Z

498

Stratospheric Analysis and Forecast Errors Using Hybrid and Sigma Coordinates  

Science Conference Proceedings (OSTI)

Past investigations have documented large divergent wind anomalies in stratospheric reanalyses over steep terrain, which were attributed to discretization errors produced by the terrain-following (sigma) vertical coordinate in the forecast model. ...

Stephen D. Eckermann; John P. McCormack; Jun Ma; Timothy F. Hogan; Katherine A. Zawdie

499

Tandem mobile robot system  

DOE Patents (OSTI)

A robotic vehicle system for terrain navigation mobility provides a way to climb stairs, cross crevices, and navigate across difficult terrain by coupling two or more mobile robots with a coupling device and controlling the robots cooperatively in tandem.

Buttz, James H. (Albuquerque, NM); Shirey, David L. (Albuquerque, NM); Hayward, David R. (Albuquerque, NM)

2003-01-01T23:59:59.000Z

500

Optimization of central receiver concentrated solar thermal : site selection, heliostat layout & canting  

E-Print Network (OSTI)

In this thesis, two new models are introduced for the purposes of (i) locating sites in hillside terrain suitable for central receiver solar thermal plants and (ii) optimization of heliostat field layouts for any terrain. ...

Noone, Corey J. (Corey James)

2011-01-01T23:59:59.000Z