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Page 4279, results 106951 - 106975

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Accumulation of selenium in benthic bivalves and fine-grained sediments of San Francisco Bay, the Sacramento-San Joaquin Delta, and selected tributaries, 1984-1986
C. Johns, S. N. Luoma
1987, Open-File Report 87-562
Fine-grained, oxidized, surface sediments and two benthic bivalves (Corbicula sp., a suspension-feeding freshwater clam, and Macoma balthica, a deposit-feeding brackish water clam) were used to examine spatial distributions of selenium within San Francisco Bay and the Sacramento/San Joaquin River Delta and to compare riverine with local inputs of biologically available...
National and regional trends in water-well drilling in the United States, 1964-84
S. M. Hindall, Michael Eberle
1987, Open-File Report 87-247
Information on national and regional water well drilling activity is important for water resource planning and management and for water related equipment marketing. A study was conducted to analyze drilling trends on the basis of data for selected years from 1964 through 1984. The study focused primarily on the years...
Hydrogeology of the Salamanca area, Cattaraugus County, New York
Phillip J. Zarriello
1987, Water-Resources Investigations Report 85-4149
The hydrogeology of a 132-sq mi area centered at Salamanca, NY, is summarized in five maps at 1:24,000 scale. The maps show locations of wells and test holes, surficial geology and geologic sections, water-table surface, soil permeability, and land use. The valley-fill aquifer in the Salamanca area serves approximately 7,000...
Patterns of acid deposition variability in the Eastern United States, 1981-84
H.F. Lins, K.J. Lanfear, T. L. Schertz
1987, Open-File Report 87-454
An increase in pH and a decrease in sulfate concentration of precipitation were recorded at National Atmospheric Deposition Program and National Trends Network (NADP/NTN) monitoring sites in the Eastern United States between 1981 and 1984. The decline in acidity, however, was not spatially or temporally uniform. The range in acidity...
Hydrogeology of the Olean area, Cattaraugus County, New York
Phillip J. Zarriello, Richard J. Reynolds
1987, Water-Resources Investigations Report 85-4157
Most principal aquifers in upstate New York are unconsolidated glacial and alluvial deposits within bedrock valleys. Groundwater in these aquifers can be under either water table (unconfined) or artesian (confined) conditions. Farms, industries, or towns and cities have been built upon many of these aquifers because they form level areas...