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Page 3578, results 89426 - 89450

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Effect of faulting on ground-water movement in the Death Valley Region, Nevada and California
Claudia C. Faunt
1997, Water-Resources Investigations Report 95-4132
This study characterizes the hydrogeologic system of the Death Valley region, an area covering approximately 100,000 square kilometers. The study also characterizes the effects of faults on ground-water movement in the Death Valley region by synthesizing crustal stress, fracture mechanics, and structural geologic data. The geologic conditions are typical of...
Spatial variability of volatile organic compounds in streams on Long Island, New York, and in New Jersey
Anne K. O’Brien, Robert G. Reiser, Helle Gylling
1997, Fact Sheet 194-97
Volatile organic compounds (VOCs) are found in almost all natural and synthetic materials and are commonly used in fuels, fuel additives, solvents, perfumes, flavor additives, and deodorants. Potential health hazards and environmental degradation resulting from the widespread use of VOCs has prompted increasing concern among scientists, industry, and the general...
Documentation of computer program (FHB1) for assignment of transient specified-flow and specified-head boundaries in applications of the modular finite-diference ground-water flow model (MODFLOW)
Stanley A. Leake, Michael R. Lilly
1997, Open-File Report 97-571
A computer program called the Flow and Head Boundary Package (FHB1) was developed for the U.S. Geological Survey three-dimensional finite-difference modular ground-water flow model, commonly referred to as MODFLOW. FHB1 allows MODFLOW users to specify flow or head boundary conditions that vary at times other than starting and ending times...
Studies of the San Francisco Bay, California, estuarine ecosystem regional monitoring program results, 1996
Jelriza I. Baylosis, Jody L. Edmunds, Brian E. Cole, James E. Cloern
1997, Open-File Report 97-598
As part of a regional monitoring program, water samples were collected in the San Francisco Bay estuary during 21 cruises from January through December 1996. Conductivity, temperature, light attenuation, turbidity, oxygen, and in-vivo chlorophyll fluorescence were measured longitudinally and vertically in the main channel of the estuary from south of...
Low-flow water-quality and discharge data for lined channels in Northeast Albuquerque, New Mexico, 1990 to 1994
R.L. Gold, Robert McBreen
1997, Open-File Report 97-811
The water resources of the Albuquerque metropolitan area are under increasing scrutiny by Federal and State regulators. Because of a lack of available low-flow data for use in addressing potential water-quality problems, a project was established to collect low-flow water-quality and discharge data. The project was initiated under a current...
Snow and ice volume on Mount Spurr Volcano, Alaska, 1981
Rod S. March, Lawrence R. Mayo, Dennis C. Trabant
1997, Water-Resources Investigations Report 97-4142
Mount Spurr (3,374 meters altitude) is an active volcano 130 kilometers west of Anchorage, Alaska, with an extensive covering of seasonal and perennial snow, and glaciers. Knowledge of the volume and distribution of snow and ice on a volcano aids in assessing hydrologic hazards such as floods, mudflows, and debris...
Spring contributions to water quantity and nitrate loads in the Suwannee River during base flow in July 1995
J. R. Pittman, H. H. Hatzell, E. T. Oaksford
1997, Water-Resources Investigations Report 97-4152
The Suwannee River flows through an area of north-central Florida where ground water has elevated nitrate concentrations. A study was conducted to determine how springs and other ground-water inflow affect the quantity and quality of water in the Suwannee River. The study was done on a 33-mile (mi) reach of...
Dynamic deformations and the M6.7, Northridge, California earthquake
Joan S. Gomberg
1997, Soil Dynamics and Earthquake Engineering (16) 471-494
A method of estimating the complete time-varying dynamic formation field from commonly available three-component single station seismic data has been developed and applied to study the relationship between dynamic deformation and ground failures and structural damage using observations from the 1994 Northridge, California earthquake. Estimates from throughout the epicentral region...
A Hydrogeologic Map of the Death Valley Region, Nevada and California, Developed Using GIS Techniques
Claudia C. Faunt, Frank A. D’Agnese, A. Keith Turner
1997, Water-Resources Investigations Report 95-4016
In support of Yucca Mountain site characterization studies, a hydrogeologic framework was developed, and a hydrogeologic map was constructed for the Death Valley region. The region, covering approximately 100,000 km 2 along the Nevada-California border near Las Vegas, is characterized by isolated mountain ranges juxtaposed against broad, alluvium-filled valleys. Geologic...
Ground-water and water-chemistry data for the upper Deschutes Basin, Oregon
Rodney R. Caldwell, Margot Truini
1997, Open-File Report 97-197
This report presents ground-water data collected and compiled as part of a study of the ground-water resources of the upper Deschutes Basin, Oregon. Data in this report include tabulated information and a location map for more than 1,500 field-located water wells, hydrographs showing water-level fluctuations over various time periods for...