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Page 4443, results 111051 - 111075

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Determination of flood hydrographs for streams in South Carolina: Volume 1. Simulation of flood hydrographs for rural watersheds in South Carolina
L. R. Bohman
1990, Water-Resources Investigations Report 89-4087
A method is given for simulating a typical (average) flood hydrograph corresponding to a peak discharge of specific recurrence interval for ungaged rural basins having drainage areas less than 500 sq mi in South Carolina. Dimensionless hydrographs were developed for three regions on the basis of 188 storm events at...
Cost effectiveness of the stream-gaging program in Nevada
F.E. Arteaga
1990, Water-Resources Investigations Report 87-4213
The stream-gaging network in Nevada was evaluated as part of a nationwide effort by the U.S. Geological Survey to define and document the most cost-effective means of furnishing streamflow information. Specifically, the study dealt with 79 streamflow gages and 2 canal-flow gages that were under the direct operation of Nevada...
Probabilistic earthquake acceleration and velocity maps for the United States and Puerto Rico
S. T. Algermissen, D. M. Perkins, P.C. Thenhaus, S.L. Hanson, B.L. Bender
1990, Miscellaneous Field Studies Map 2120
The ground-motion maps presented here (maps A-D) show the expected seismic induced or earthquake caused maximum horizontal acceleration and velocity in rock in the contiguous United States, Alaska, Hawaii, and Puerto Rico.  There is a 90 percent probability that the maximum horizontal acceleration and velocity shown on the maps will...
Effects of acidic precipitation on the water quality of streams in the Laurel Hill area, Somerset County, Pennsylvania, 1983-86
J. L. Barker, E. C. Witt III
1990, Water-Resources Investigations Report 89-4113
Five headwater streams in the Laurel Hill area in southwestern Pennsylvania were investigated from September 1983 through February 1986 to determine possible effects of acidic precipitation on water quality. Precipitation in the Laurel Hill area is among the most acidic in the Nation, with a mean volume-weighted pH of 4.06....
Flow characteristics of streams that drain the Fort Apache and San Carlos Indian reservations, east-central Arizona, 1930-86
Stanley Baldys, J.A. Bayles
1990, Water-Resources Investigations Report 90-4053
Streamflow characteristics of the Salt River and Gila River basins in the Fort Apache and San Carlos Indian Reservations, were studied in response to pending adjudication of water resources in those basins. Statistical summaries were compiled for 28 streamflow-gaging stations in and near the reservation. Mean annual streamflow for 1930-86...
Water-quality data (October 1988 through September 1989) and statistical summaries (March 1985 through September 1989) for the Clark Fork and selected tributaries from Galen to Missoula, Montana
J. H. Lambing
1990, Open-File Report 90-168
Water quality sampling was conducted at eight sites on the Clark Fork and selected tributaries from Galen to Missoula, from October 1988 through September 1989. This report presents tabulations and statistical summaries of the water quality data. Included are tabulations of streamflow, onsite water quality, and concentrations of trace elements...
A finite-element model for simulation of two-dimensional steady-state ground-water flow in confined aquifers
E. L. Kuniansky
1990, Open-File Report 90-187
A computer program based on the Galerkin finite-element method was developed to simulate two-dimensional steady-state ground-water flow in either isotropic or anisotropic confined aquifers. The program may also be used for unconfined aquifers of constant saturated thickness. Constant head, constant flux, and head-dependent flux boundary conditions can be specified in...
Ground-water resources of the Arkansas River basin in Arkansas
J. M. Kilpatrick, A. H. Ludwig
1990, Open-File Report 88-725
The Arkansas River basin in Arkansas lies almost entirely within the Interior Highlands physiographic division. The Interior Highlands consist of hilly to mountainous terrain underlain by sandstone, shale, limestone, and dolomite. That part of the basin southeast of Little Rock lies within the Gulf Coastal Plain and is characterized by...