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Page 4718, results 117926 - 117950

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Drainage divides, Massachusetts; Housatonic River basin
Russell A. Gadoury, S. William Wandle Jr.
1983, Open-File Report 82-634
Drainage boundaries for selected subbasins in Berkshire County, Massachusetts, are delineated on 12 topographic quadrangle maps at a scale of 1:24,000. Drainage basins are shown for all U.S. Geological Survey data-collection sites and for mouths of major rivers. Drainage basins are shown for the outlets of lakes or ponds and...
Aquifer systems in the Great Basin region of Nevada, Utah, and adjacent states: A study plan
James R. Harrill, Alan H. Welch, David E. Prudic, James M. Thomas, Rita L. Carman, Russell W. Plume, Joseph S. Gates, James L. Mason
1983, Open-File Report 82-445
The Great Basin Regional Aquifer Study includes about 140,000 square miles in parts of Nevada, Utah, California, Idaho, Oregon, and Arizona. Within that area, 240 hydrographic areas occupy structural depressions formed primarily by basin-and-range faulting. The principal aquifers are in basin- fill deposits; however, permeable carbonate rocks underlie valleys in...
Map showing distribution of small-scale deformation structures in a part of the upper coastal plain of South Carolina and adjacent Georgia
R. C. McDowell, B. B. Houser
1983, Miscellaneous Field Studies Map 1538
As a contribution to the assessment of neotectonics in the area of the Upper Coastal Plain of South Carolina, field traverses were made between Columbia, S.C., and Augusta, Ga., in 1975 and early 1976 in order to locate and describe small-scale deformation structures within exposed Coastal Plain rocks. The study...
Aeromagnetic map of the Powderhorn wilderness study area and Cannibal Plateau Roadless Area, Gunnison and Hinsdale counties, Colorado
R.A. Martin, William N. Sharp
1983, Miscellaneous Field Studies Map 1483-B
The Powderhorn Wilderness Study Area (51,000 acres or 20,640 hectares) and the contiguous Cannibal Plateau Roadless Area (29,500 acres or 11,959 hectares) are on the Gunnison County-Hinsdale County boundary, approximately 50mi (80 km) southwest of Gunnison and a few miles east of Lake City, Colo. Part of the area has...
Distribution of selected chemical constituents in water from the Floridan aquifer, Southwest Florida Water Management District
M.A. Corral Jr.
1983, Water-Resources Investigations Report 83-4041
Generalized maps showing variations in concentration of chlorides, sulfates, hardness, and dissolved solids in the Floridan aquifer have been prepared as part of a cooperative program with the Southwest Florida Water Management District. This report covers 10 counties and parts of 6 others comprising the District. Data used to develop...
Microcumpter computation of water quality discharges
Dennis R. Helsel
1983, Open-File Report 82-901
A fully prompted program (SEDQ) has been developed to calculate daily and instantaneous water quality (QW) discharges. It is written in a version of BASIC, and requires inputs of gage heights, discharge rating curve, shifts, and water quality concentration information. Concentration plots may be modified interactively using the display screen....
Hydrogeologic and water-quality characteristics of the Upper Carbonate aquifer, Southeast Minnesota
J. F. Ruhl, R. J. Wolf
1983, Water-Resources Investigations Report 84-4150
The Upper Carbonate aquifer is part of a sequence of sedimentary bedrock units deposited in Paleozoic seas that occupied a depression known as the Hollandale embayment. The aquifer is comprised of four formations, which, in ascending order, are the Galena Dolomite, Dubuque Formation, Maquoketa Shale, and Cedar Valley Limestone. Total...
Hydrogeologic and water-quality characteristics of the St. Peter aquifer, Southeast Minnesota
J. F. Ruhl, R. J. Wolf
1983, Water-Resources Investigations Report 83-4200
Quality of water in the St. Peter aquifer is generally acceptable for most uses. Sulfate concentrations increase toward the southwestern part of the aquifer because of highly mineralized leakage from overlying Cretaceous deposits. Concentrations of sodium, magnesium, and sulfate generally increase to the west, and those of calcium, bicarbonate, and...
Trends and fluctuations in the potentiometric surface of the Floridan aquifer, west-central Florida 1961-80
D. K. Yobbi
1983, Water-Resources Investigations Report 82-4086
Trends and fluctuations of water levels in wells tapping the Floridan aquifer in west-central Florida during 1961-80 are described in this report. Water levels in most of the study area have not changed appreciably, except in parts of Hardee, Hillsborough, Manatee, Polk, and Sarasota Counties. In these areas, ground-water pumpage...
Regional flow in the Dakota aquifer: A study of the role of confining layers
John D. Bredehoeft, C. E. Neuzil, P. C. Milly
1983, Water Supply Paper 2237
The Dakota Sandstone in South Dakota is one of the classic artesian aquifers; it was first studied by N. H. Darton at the turn of the century. Since then, hydrogeologists have debated the source of the large quantities of water which have been discharged by artesian flow from the Dakota....