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Page 4206, results 105126 - 105150

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Sediment sources in the Lake Tahoe Basin, California-Nevada; preliminary results of a four-year study, August 1983-September 1987
B. R. Hill, J.R. Hill, K.M. Nolan
1988, Open-File Report 88-333
Data were collected during a 4-yr study of sediment sources in four drainage basins tributary to Lake Tahoe, California-Nevada. The study areas include the Blackwood, General, Edgewood, and Logan House Creek basins. Data include changes in bank and bed positions at channel cross sections; results of stream-channel mapping; analyses of...
Hydrogeology and flow of water in a sand and gravel aquifer contaminated by wood-preserving compounds, Pensacola, Florida
B.J. Franks
1988, Water-Resources Investigations Report 87-4260
The sand and gravel aquifer in southern Escambia County, Florida , is a typical surficial aquifer composed of quartz sands and gravels interbedded locally with silts and clays. Problems of groundwater contamination from leaking surface impoundments are common in surficial aquifers and are a subject of increasing concern and attention....
Manmade organic compounds in the surface waters of the United States; a review of current understanding
James A. Smith, P.J. Witkowski, Thomas V. Fusillo
1988, Circular 1007
This report reviews the occurrence and distribution of manmade organic compounds in the surface waters of the United States. On the basis of their aqueous solubilities, nonionic organic compounds partition themselves among water, dissolved organic matter, particulate organic matter, and the lipid reservoirs of aquatic organisms. Ionized organic compounds can...
Preliminary evaluation of ground-water flow in Bear Creek Valley, the Oak Ridge Reservation, Tennessee
Z. C. Bailey
1988, Water-Resources Investigations Report 88-4010
Bear Creek Valley, Tennessee contains hazardous waste disposal sites where contaminants leach into ground and surface water. Groundwater flow and the potential migration of contaminants is poorly understood. The Valley is underlain by calcareous shale that contains limestone units. Ridges to the north and south are underlain by interbedded sandstones,...
Well construction, lithology, and geophysical logs for boreholes in Bear Creek Valley near Oak Ridge, Tennessee
Z. C. Bailey, D. W. Hanchar
1988, Water-Resources Investigations Report 88-4068
Twenty-four wells were constructed at nine sites at Bear Creek Valley to provide geologic and hydrologic information. Lithologic samples and suits of geophysical logs were obtained from the deepest boreholes at six of the sites. Two of these boreholes at the base of Chestnut Ridge were completed in the Maynardville...
A water-resources appraisal of the Mount Shasta area in northern California, 1985
J. C. Blodgett, K.R. Poeschel, J.L. Thornton
1988, Water-Resources Investigations Report 87-4239
Present Mount Shasta, California, area hydrologic characteristics were documented to compare future changes due to land use or volcanic activity. Lower flanks of Mount Shasta consist of broad aprons of pyroclastic-flow, debris flow, and fluvial deposits, with incised channels on upper parts of the mountain. Data include glacial areas and...
Tolerances of plants to drought and salinity in the western United States
Farrel Allen Branson, Reuben Fred Miller, Stephen K. Sorenson
1988, Water-Resources Investigations Report 88-4070
Differing capacities of plant species to tolerate drought and salinity are causative factors for presence of species and communities in various habitats. It is proposed that minimum xylem pressure potentials measured are indicative of drought tolerance and that minimum cell osmotic potentials are indicative of salt tolerance of plant species....
Results of external quality-assurance program for the National Atmospheric Deposition Program and National Trends Network during 1985
M. H. Brooks, L.J. Schroder, T. C. Willoughby
1988, Water-Resources Investigations Report 87-4219
External quality assurance monitoring of the National Atmospheric Deposition Program (NADP) and National Trends Network (NTN) was performed by the U.S. Geological Survey during 1985. The monitoring consisted of three primary programs: (1) an intersite comparison program designed to assess the precision and accuracy of onsite pH and specific conductance...