Hydrogeology, water quality, and potential for contamination of the Upper Floridan aquifer in the Silver Springs ground-water basin, central Marion County, Florida
G. G. Phelps
1994, Water-Resources Investigations Report 92-4159
The Upper Floridan aquifer, composed of a thick sequence of very porous limestone and dolomite, is the principal source of water supply in the Silver Springs ground-water basin of central Marion County, Florida. The karstic nature of the local geology makes the aquifer susceptible to contaminants from the land surface....
Estimated water withdrawals in Mississippi during 1990
Penny M. Johnson
1994, Fact Sheet 060-94
Ground-water recharge near Santa Fe, north-central New Mexico
S. K. Anderholm
1994, Water-Resources Investigations Report 94-4078
Recharge to the basin-fill aquifer near Santa Fe, New Mexico, was investigated using chloride mass-balance methods. Chloride concentrations in water in the unsaturated zone indicate no recharge in areas where runoff and flooding do not occur. The mass of chloride stored in the upper part of the unsaturated zone in...
Geologic map of the East Canyon Ridge Quadrangle, southern Cascade Range, Washington
Donald A. Swanson
1994, Open-File Report 94-591
Geohydrology of the High Energy Laser System Test Facility site, White Sands Missile Range, Tularosa Basin, south-central New Mexico
G.T. Basabilvazo, R. G. Myers, E. L. Nickerson
1994, Water-Resources Investigations Report 93-4192
The Yesum-HoHoman and Gypsum land (hummocky) soils at the High Energy Laser System Test Facility (HELSTF) represent wind deposits from recently desiccated lacustrine deposits and deposits from the ancestral Lake Otero. The upper 15-20 feet of the subsurface consists of varved gypsiferous clay and silt. Below these surfidai deposits the...
Mineralogy of selected sedimentary interbeds at or near the Idaho National Engineering Laboratory, Idaho
Michael F. Reed, Roy C. Bartholomay
1994, Open-File Report 94-374
The U.S. Geological Survey (USGS) Project Office at the Idaho National Engineering Laboratory (INEL), in cooperation with the U.S. Department of Energy and Idaho State University, analyzed 66 samples from sedimentary interbed cores during a 38-month period beginning in October 1990 to determine bulk and clay mineralogy. These cores had...
The July 1992 seismic calibration experiment along the Landers, California earthquake rupture
Donna Eberhart-Phillips, Jim J. Mori
1994, Open-File Report 94-590
Analysis of data on nutrients and organic compounds in ground water in the upper Snake River basin, Idaho and western Wyoming, 1980-91
Michael G. Rupert
1994, Water-Resources Investigations Report 94-4135
Nutrient and organic compound data from the U.S. Geological Survey and the U.S. Environmental Protection Agency STORET data bases provided information for development of a preliminary conceptual model of spatial and temporal ground-water quality in the upper Snake River Basin. Nitrite plus nitrate (as nitrogen; hereafter referred to as nitrate)...
Quality of ground water around Vadnais Lake and in Lambert Creek watershed, and interaction of ground water with Vadnais Lake, Ramsey County, Minnesota
J. F. Ruhl
1994, Water-Resources Investigations Report 94-4062
Vadnais Lake is located in northern Ramsey County, Minnesota. The lake is managed by the St. Paul Water Utility for storage of municipal water supplies that are provided to residents of St. Paul and surrounding communities. In recent years, algal blooms in Vadnais Lake have caused taste and odor problems...
Estimation of ground-water recharge from precipitation, runoff into drywells, and on-site waste-disposal systems in the Portland Basin, Oregon and Washington
D.T. Snyder, D. S. Morgan, T.S. McGrath
1994, Water-Resources Investigations Report 92-4010
The average recharge rate in the Portland Basin, in northwestern Oregon and southwestern Washington, is estimated to be about 22.0 inches per year. Of that amount, precipitation accounts for about 20.8 inches per year, runoff into drywells 0.9 inches per year, and on-site waste disposal about 0.4 inches per year....
Ground-water quality and geochemistry in Carson and Eagle Valleys, western Nevada and eastern California
Alan H. Welch
1994, Open-File Report 93-33
Aquifers in Carson and Eagle Valleys are an important source of water for human consumption and agriculture. Concentrations of major constituents in water from the principal aquifers on the west sides of Carson and Eagle Valleys appear to be a result of natural geochemical reactions with minerals derived primarily from...
Results of exploratory drilling from February 1992 to July 1992, Coal Resource Exploration and Assessment Program (COALREAP), Thar Desert, Lakhra south, Indus Plain, and adjacent areas, Sindh Province, Pakistan; Part IIb, Lithologic and geophysical logs for the Lakhra South area
John R. SanFilipo, Rafiq A. Khan, Abbas Ali Shah
1994, Open-File Report 94-596-B
Results of exploratory drilling from February 1992 to July 1992, Coal Resource Exploration and Assessment Program (COALREAP), Thar Desert, Lakhra south, Indus Plain, and adjacent areas, Sindh Province, Pakistan; Part IIa, Lithologic and geophysical logs for the Indus Plain area
John R. SanFilipo, Rafiq A. Khan, Abbas Ali Shah
1994, Open-File Report 94-596-A
User's guide to revised method-of-characteristics solute-transport model (MOC--version 31)
Leonard F. Konikow, G.E. Granato, G.Z. Hornberger
1994, Water-Resources Investigations Report 94-4115
The U.S. Geological Survey computer model to simulate two-dimensional solute transport and dispersion in ground water (Konikow and Bredehoeft, 1978; Goode and Konikow, 1989) has been modified to improve management of input and output data and to provide progressive run-time information. All opening and closing of files are now done...
Topographic map of the Nankoweap Rapids area, Marble Canyon, Arizona
Richard Hereford, K. S. Thompson
1994, Open-File Report 94-564
Altitude and configuration of the potentiometric surface in Buckingham and Wrightstown townships, Bucks County, Pennsylvania, June 1992 through January 1993
B. C. McManus, C.L. Schreffler, C.J. Rowland
1994, Open-File Report 93-417
A map showing ground-water levels in Buckingham and Wrightstown Townships, Bucks County, Pennsylvania, was constructed from water levels measured in 251 wells and from 3 reported elevations of quarry sumps from June 1992 through January 1993. Observed water-level altitudes range from 459 feet above sea level along Burnt House Hill...
Preliminary geologic map of the Arlington quadrangle and Vermont portion of the Shushan quadrangle, Bennington County, Vermont
P. T. Lyttle
1994, Open-File Report 94-262
No abstract available....
Use of a precipitation-runoff model for simulating effects of forest management on streamflow in 11 small drainage basins, Oregon Coast Range
J. C. Risley
1994, Water-Resources Investigations Report 93-4181
The Precipitation-Runoff Modeling System (PRMS) model of the U.S. Geological Survey was used to simulate the hydrologic effects of timber management in 11 small, upland drainage basins of the Coast Range in Oregon. The coefficients of determination for observed and simulated daily flow during the calibration periods ranged from 0.92...
Zebra mussels in the eastern United States
Kim H. Haag
1994, Fact Sheet 014-94
Application of a Geographic Information System for regridding a ground-water flow model of the Columbia Plateau Regional Aquifer System, Walla Walla River basin, Oregon-Washington
M.E. Darling, L.E. Hubbard
1994, Water-Resources Investigations Report 89-4179
Computerized Geographic Information Systems (GIS) have become viable and valuable tools for managing,analyzing, creating, and displaying data for three-dimensional finite-difference ground-water flow models. Three GIS applications demonstrated in this study are: (1) regridding of data arrays from an existing large-area, low resolution ground-water model to a smaller, high resolution grid;...
Summary of ground-water conditions in Arizona, 1987-90
D.W. Anning, N.R. Duet
1994, Open-File Report 94-476
Annual ground-water withdrawals in Arizona were 2.9, 3.3, 3.6, and 3.4 million acre-feet for calendar years 1987. 1988, 1989, and 1990. The average annual ground-water withdrawal for Arizona from 1980-89 was 3.7 million acre-feet, which was the lowest average annual withdrawal for any decade since the 1940' s. Since 1947,...
Aeromagnetic map of the Stockton 1:100,000-scale quadrangle, California
R.C. Jachens
1994, Open-File Report 94-613
The accompanying aeromagnetic map is part of the San Francisco Bay area National Geologic Mapping Project and is intended to promote further understanding of the geology in the Stockton 1:100,000-scale quadrangle, California, by serving as a basis for geophysical interpretations and by supporting geological mapping, mineral resource investigations, and topical...
Hydrogeology of recharge areas and water quality of the principal aquifers along the Wasatch Front and adjacent areas, Utah
P.B. Anderson, D. D. Susong, S.R. Wold, V.M. Heilweil, R. L. Baskin
1994, Water-Resources Investigations Report 93-4221
The principal basin-fill aquifers in Cache Valley, the lower Bear River area, and along the Wasatch Front provide ground water to about 84 percent of the population of Utah. Recharge areas for the principal aquifers were mapped to provide information needed for the implementation of ground-water quality regulations and a...
Scour assessment at bridges from Flag Point to Million Dollar Bridge, Copper River Highway, Alaska
T. P. Brabets
1994, Water-Resources Investigations Report 94-4073
Twelve bridges are located along the Copper River Highway from Flag Point (Mile 27) to lhe Million Dollar Bridge (Mile 48). These bridges cross all or parts of the Copper River. Channel scour at these bridges was assessed by collecting and analyzing discharge and sediment data, analyzing aerial photography for...
Interaction of ground water with the Rock River near Byron, Illinois
C.F. Avery
1994, Water-Resources Investigations Report 94-4034
Ground-water discharge to the Rock River in the study area, estimated by three independent methods, ranged from 16,300 to 30,900 cubic feet per day; the low value, determined by the use of the modified Darcy equation, is an estimate only of ground-water discharge from the southern side of the Rock...
