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Page 4521, results 113001 - 113025

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Test holes for monitoring surface-water/ground-water relations in the Cottonwood Creek area, Shasta and Tehama Counties, California, 1984-85
M. J. Johnson, E.R. Houston, J. M. Neil
1989, Water-Resources Investigations Report 88-4090
Ten test holes were drilled to obtain hydrogeologic information for an investigation of stream-aquifer interaction near proposed damsites on Cottonwood Creek and South Fork Cottonwood Creek, California. At each site, one deep well was completed below the first confining clay encountered in the upper Tehama Formation to determine hydraulic gradients...
Geohydrology and susceptibility of aquifers to surface contamination in Alabama; area 5
R. E. Kidd
1989, Water-Resources Investigations Report 88-4083
The U.S. Geological Survey, in cooperation with the Alabama Department of Environmental Management, is conducting a series of geohydrologic studies to delineate the major aquifers and their susceptibility to contamination in Alabama. This report delineates and describes the geohydrology and susceptibility of the major aquifers to contamination in Area 5--Chambers,...
Geohydrologic aspects for siting and design of low-level radioactive-waste disposal
M. S. Bedinger
1989, Circular 1034
The objective for siting and design of low-level radioactive-waste repository sites is to isolate the waste from the biosphere until the waste no longer poses an unacceptable hazard as a result of radioactive decay. Low-level radioactive waste commonly is isolated at shallow depths with various engineered features to stabilize the...
Estimation of the recharge area of a pumped, stratified-drift aquifer in Connecticut by simulation modeling
D. L. Mazzaferro
1989, Water-Resources Investigations Report 87-4124
Groundwater quality management plans in Connecticut require information about the size and shape of recharge areas that contribute flow to pumping centers in extensive, stratified-drift aquifers. Flow models of a hypothetical aquifer , and a stratified-drift aquifer in Farmington are used to evaluate how contributing areas change in response to...
Estimates of mean monthly streamflow for selected sites in the Musselshell River basin, Montana, base period water years 1937-86
Charles Parrett, D.R. Johnson
1989, Water-Resources Investigations Report 89-4165
Estimates of mean monthly and mean annual streamflow were made for 56 selected sites in the Musselshell River basin and 1 site outside the basin. The study area was divided into a Mountain Region and a Plains Region and the estimation methods were applied separately in the two regions. Four...
Hydrology of the Castle Lake blockage, Mount St. Helens, Washington
William Meyer, M. A. Sabol
1989, Water-Resources Investigations Report 87-4272
The debris avalanche that occurred during the May 19, 1980, eruption of Mount St. Helens blocked South Fork Castle Creek and created Castle Lake. Stability of the blockage was of concern, and a digital model that simulates three-dimensional groundwater movement in the blockage was constructed as part of the analysis...
Aquifer tests in the flood-plain alluvium and Santa Fe group at the Rio Grande near Canutillo, El Paso County, Texas
Edward L. Nickerson
1989, Water-Resources Investigations Report 89-4011
An aquifer system consisting of the Rio Grande flood-plain alluvium and Santa Fe Group underlying the southern Mesilla Valley in Dona Ana County, New Mexico and El Paso County, Texas has become an important source of water for both municipal and agricultural uses. Determination of aquifer properties is essential in...
Quality-assurance data for routine water analysis in the National Water-Quality Laboratory of the US Geological Survey for water year 1988
K.J. Lucey
1989, Water-Resources Investigations Report 89-4166
The US Geological Survey maintains a quality assurance program based on the analysis of reference samples for its National Water Quality Laboratory located in Denver, Colorado. Reference samples containing selected inorganic, nutrient, and precipitation (low-level concentration) constituents are prepared at the Survey 's Water Quality Services Unit in Ocala, Florida,...