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Page 4717, results 117901 - 117925

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Hydrology and water-quality at the Weldon Spring radioactive waste-disposal sites, St. Charles County, Missouri
M. J. Kleeschulte, L. F. Emmett
1987, Water-Resources Investigations Report 87-4169
Water samples from five monitoring wells adjacent to raffinate pits storing low-level radioactive waste contained concentrations of nitrate as nitrogen ranging from 53 to 990 milligrams per liter. Most samples also had maximum concentrations of calcium (900 milligrams per liter), sodium (340 milligrams per liter), sulfate (320 milligrams per liter),...
Flood hazard assessment of the Hoh River at Olympic National Park ranger station, Washington
D. L. Kresch, T.C. Pierson
1987, Water-Resources Investigations Report 86-4198
Federal regulations require buildings and public facilities on Federal land to be located beyond or protected from inundation by a 100-year flood. Flood elevations, velocities and boundaries were determined for the occurrence of a 100-year flood through a reach, approximately 1-mi-long, of the Hoh River at the ranger station complex...
Geohydrology and water quality of the Inyan Kara, Minnelusa, and Madison aquifers of the northern Black Hills, South Dakota and Wyoming, and Bear Lodge Mountains, Wyoming
D.P. Kyllonen, K. D. Peter
1987, Water-Resources Investigations Report 86-4158
The Inyan Kara, Minnelusa, and Madison aquifers are the principal sources of ground water in the northern Black Hills, South Dakota and Wyoming, and Bear Lodge Mountains, Wyoming. The aquifers are exposed in the Bear Lodge Mountains and the Black Hills and are about 3,000 to 5,000 ft below the...
Flood hazards along the Toutle and Cowlitz rivers, Washington, from a hypothetical failure of Castle Lake blockage
Antonius Laenen, L.L. Orzol
1987, Water-Resources Investigations Report 87-4055
A recent evaluation of groundwater and material in the blockage impounding Castle Lake shows that the blockage is potentially unstable against failure from piping due to heave and internal erosion when groundwater levels are seasonally high. There is also a remote possibility that a 6.8 or greater magnitude earthquake could...
Low streamflow conditions in the western states during 1987
L.L. Hubbard
1987, Water-Resources Investigations Report 87-4267
Drought conditions prevailed throughout the States of California , Nevada, Idaho, Oregon, and Washington during the summer of 1987. Streamflows were the lowest since the drought of 1977. Many streams had less discharge in August-September 1987 than in August-September of 1977. At some sites flows for July, August, and September...
AQMAN; linear and quadratic programming matrix generator using two-dimensional ground-water flow simulation for aquifer management modeling
L.J. Lefkoff, S.M. Gorelick
1987, Water-Resources Investigations Report 87-4061
A FORTRAN-77 computer program code that helps solve a variety of aquifer management problems involving the control of groundwater hydraulics. It is intended for use with any standard mathematical programming package that uses Mathematical Programming System input format. The computer program creates the input files to be used by the...
Water quality of Cedar Creek reservoir in northeast Texas, 1977 to 1984
Norman F. Leibbrand, Willard J. Gibbons
1987, Water-Resources Investigations Report 87-4231
Water in Cedar Creek Reservoir in northeast Texas had volume-weighted average concentrations of less than 140 milligrams per liter of dissolved solids, less than 30 milligrams per liter of dissolved sulfate, and less than 25 milligrams per liter of chloride between vh nuary 1977 and August 1984. The water was...
Ground-water quality assessment of the central Oklahoma Aquifer, Oklahoma; project description
S. C. Christenson, D.L. Parkhurst
1987, Open-File Report 87-235
In April 1986, the U.S. Geological Survey began a pilot program to assess the quality of the Nation's surface-water and ground-water resources. The program, known as the National Water-Quality Assessment (NAWQA) program, is designed to acquire and interpret information about a variety of water-quality issues. The Central Oklahoma aquifer project is...
Low-flow-frequency characteristics for continuous-record streamflow stations in Minnesota
A.D. Arntson, D. L. Lorenz
1987, Water-Resources Investigations Report 86-4353
Annual and summer (May 1 to September 30) low-flow frequency curves are presented for 175 continuous-record streamflow stations in Minnesota. The curves were developed for all stations with 10 or more years of continuous record. The 1-, 7-, and 30-day low-flow discharges at selected recurrence intervals obtained from these curves...
Statistical analysis of aquifer-test results for nine regional aquifers in Louisiana
Angel Martin, D. A. Early
1987, Water-Resources Investigations Report 87-4001
This report, prepared as part of the Gulf Coast Regional Aquifer-System Analysis project, presents a compilation, summarization, and statistical analysis of aquifer-test results for nine regional aquifers in Louisiana. These are from youngest to oldest: The alluvial, Pleistocene, Evangeline, Jasper, Catahoula, Cockfield, Sparta, Carrizo, and Wilcox aquifers. Approximately 1,500 aquifer...
Habitat Suitability Index Models: Black-shouldered kite
Craig A. Faanes, Rebecca J. Howard
1987, FWS/OBS 82/10.130
A review and synthesis of existing information were used to develop a model for evaluating black-shouldered kite habitat quality. The model is scaled to produce an index between 0 (unsuitable habitat) to 1.0 (optimal habitat). Habitat suitability index models are designed for use with the Habitat Evaluation Procedures previously developed...