Ground-water recharge to and storage in the regolith-fractured crystalline rock aquifer system, Guilford County, North Carolina
C. C. Daniel III, D.A. Harned
1998, Water-Resources Investigations Report 97-4140
Quantitative information concerning recharge rates to aquifers and ground water in storage is needed to manage the development of ground- water resources. The amount of ground water available from the regolith-fractured crystalline rock aquifer system in Guilford County, North Carolina, is largely unknown. If historical patterns seen throughout the Piedmont...
Potentiometric surface of the Sparta aquifer in eastern and south-central Arkansas and north-central Louisiana, and the Memphis Aquifer in east-central Arkansas, October 1996-July 1997
Robert L. Joseph
1998, Water-Resources Investigations Report 97-4282
During the 1997 water year, the water level in the Sparta and Memphis aquifers was measured in about 274 wells in Arkansas, and the water level in the Sparta aquifer was measured in about 55 wells in Louisiana. The potentiometric surface data reveal spatial trends across the study area. In...
Monitoring the Water Quality of the Nation's Large Rivers: Columbia River Basin NASQAN Program
Valerie J. Kelly, Richard P. Hooper
1998, Fact Sheet 004-98
In 1995, the U.S. Geological Survey's (USGS) National Stream Quality Accounting Network (NASQAN) Program began monitoring the water quality of the Columbia River Basin, applying a basinwide approach in order to understand water quality on a regional scale. A primary objective of the Columbia NASQAN Program is to provide an...
Water-level changes (1975-98) in the Antelope Valley, California
Carl S. Carlson, Steven P. Phillips
1998, Open-File Report 98-561
Antelope Valley is in the western part of the Mojave Desert in southern California, about 50 mi northeast of Los Angeles. Between 1975 and 1998, water levels in the valley have changed in response to a shift in ground-water use from agricultural to urban, declining in some areas and rising...
Environmental setting of the San Joaquin-Tulare basins, California
JoAnn A. Gronberg, Neil M. Dubrovsky, Charles R. Kratzer, Joseph L. Domagalski, Larry R. Brown, Karen R. Burow
1998, Water-Resources Investigations Report 97-4205
The National Water-Quality Assessment Program for the San Joaquin-Tulare Basins began in 1991 to study the effects of natural and anthropogenic influences on the quality of ground water, surface water, biology, and ecology. The San Joaquin-Tulare Basins study unit, which covers approximately 31,200 square miles in central California, is made...
Combining satellite data with ancillary data to produce a refined land-use/land-cover map
Jana S. Stewart
1998, Water-Resources Investigations Report 97-4203
As part of the U.S. Geological Survey's National Water-Quality Assessment Program in the Western Lake Michigan Drainages Study Unit, a current map of land use and land cover is needed to gain a better understanding of how land use and land cover may influence water quality. Satellite data from the...
Peak-discharge frequency and potential extreme peak discharge for natural streams in the Brazos River basin, Texas
Timothy H. Raines
1998, Water-Resources Investigations Report 98-4178
The 2-, 5-, 10-, 25-, 50-, and 100-year peak discharges were estimated for 186 streamflow-gaging stations with at least 8 years of data for natural streams in and near the Brazos River Basin, Texas. Multiple regression equations were developed to estimate peak-discharge frequency for the 2-, 5-, 10-, 25-, 50-,...
Science for watershed decisions on abandoned mine lands; review of preliminary results, Denver, Colorado, February 4-5, 1998
David A. Nimick, Paul Von Guerard
1998, Open-File Report 98-297
From the Preface: There are thousands of abandoned or inactive mines on or adjacent to public lands administered by the U.S. Forest Service, Bureau of Land Management, and National Park Service. Mine wastes from many of these abandoned mines adversely affect resources on public lands. In 1995, an interdepartmental work...
EPA method 1312 (synthetic precipitation leaching procedure); leachate chemistry data for solid mine waste composite samples from Silverton and Leadville, Colorado
Maria R. Montour, P. L. Hageman, A. L. Meier, Peter Theodorakos, Paul H. Briggs
1998, Open-File Report 98-624
The EPA Method 1312 Synthetic Precipitation Leaching Procedure (SPLP) leachate chemistry data for mine waste samples is presented. Four mine waste composite samples were collected from Silverton (YUK and MAY) and Leadville (SUN and VEN), Colorado and were extracted following the EPA Method 1312 procedure. Leachate pH values ranged from...
Indirect ground-water discharge to the Great Lakes
David J. Holtschlag, J.R. Nicholas
1998, Open-File Report 98-579
Estimates of the average ground-water component of streamflow for 195 streams in the United States part of the Great Lakes Basin range from 25 to 97 percent. Among the selected streams, the average ground-water component of streamflow was 67.3 percent. Estimates of the ground-water component of streamflow are based on...
Data-collection methods used in the Demonstration Erosion Control Project in the Yazoo River Basin, north-central Mississippi, July 1985-September 1997
M.S. Runner, B.A. Roberts
1998, Open-File Report 98-560
Ground-water flow in the New Jersey Coastal Plain
Mary Martin
1998, Professional Paper 1404-H
Ground-water flow in 10 aquifers and 9 intervening confining units of the New Jersey Coastal Plain was simulated as part of the Regional Aquifer System Analysis. Data on aquifer and confining unit characteristics and on pumpage and water levels from 1918 through 1980 were incorporated into a multilayer finite-difference model....
Accounting for cyanide and its degradation products at three Nevada gold mines; constraints from stable C- and N-isotopes
C. A. Johnson, D. J. Grimes, R. O. Rye
1998, Open-File Report 98-753
An understanding of the fate of cyanide (CN-) in mine process waters is important for addressing environmental concerns and for taking steps to minimize reagent costs. The utility of stable isotope methods in identifying cyanide loss pathways has been investigated in case studies at three Nevada gold mines. Freshly prepared barren solutions at the...
Geologic map of part of the Tyrrhena Patera region of Mars (MTM Quadrangle-20252)
T.K.P. Gregg, D.A. Crown, Ronald Greeley
1998, IMAP 2556
Mars Transverse Mercator (MTM) -20252 quadrangle contains the volcano Tyrrhena Patera, a low, broad structure that has summit depressions and is dissected by prominent radial channels...
Water quality assessment of the San Joaquin-Tulare basins, California: Analysis of available data on nutrients and suspended sediment in surface water, 1972-1990
Charles R. Kratzer, Jennifer L. Shelton
1998, Professional Paper 1587
Nutrients and suspended sediment in surface water of the San Joaquin-Tulare basins in California were assessed using 1972-1990 data from the U.S. Geological Survey's National Water Information System and the U.S. Environmental Protection Agency's STOrage and RETrieval database. Loads of nutrients and suspended sediment were calculated at several sites and...
Hydrologic classification and estimation of basin and hydrologic characteristics of subbasins in central Idaho
Stephen W. Lipscomb
1998, Professional Paper 1604
Hydrologic data for streams and associated subbasins within the Salmon and Clearwater river basins were analyzed to support instream flow claims by the Bureau of Indian Affairs on behalf of the Nez Perce Indian Tribe. A geographic information system was used to construct a data base of basin characteristics for...
Evaluation of faults and their effect on ground-water flow southwest of Frenchman Flat, Nye and Clark counties, Nevada: a digital database
Edwin H. McKee, Thomas A. Wickham, Karen L. Wheeler
1998, Open-File Report 98-580
Ground-water flow through the region south and west of Frenchman Flat, in the Ash Meadows subbasin of the Death Valley ground-water flow system, is controlled mostly by faults which arrange the distribution of permeable and impermeable rocks. In addition, most permeability is along fractures caused by faulting in carbonate rocks....
Thickness of Cenozoic deposits and location and geometry of the Las Vegas Valley shear zone, Nevada, based on gravity, seismic-reflection, and aeromagnetic data
V.E. Langenheim, John Grow, J. J. Miller, J. D. Davidson, E. Robison
1998, Open-File Report 98-576
No abstract available....
Data Quality Objectives and Criteria for Basic Information, Acceptable Uncertainty, and Quality-Assurance and Quality-Control Documentation
Gregory E. Granato, Fred G. Bank, Patricia A. Cazenas
1998, Open-File Report 98-394
The Federal Highway Administration and State transportation agencies have the responsibility of determining and minimizing the effects of highway runoff on water quality; therefore, they have been conducting an extensive program of water-quality monitoring and research during the last 25 years. The objectives and monitoring goals of highway runoff studies...
Loads and yields of sediment and water-quality constituents in Kentucky streams
Rene Garcia, Angela S. Crain
1998, Open-File Report 98-411
Loads and yields of sediment and water-quality constituents were estimated for selected Kentucky streams. Streamflow, sediment, and water-quality information were collected at a network of 44 stream stations in Kentucky. Mean daily discharge was synthesized using the drainage-area ratio, regression analysis, or a combination of the two techniques. Streamflow was...
A Review of Semivolatile and Volatile Organic Compounds in Highway Runoff and Urban Stormwater
Thomas J. Lopes, Shannon G. Dionne
1998, Open-File Report 98-409
Many studies have been conducted since 1970 to characterize concentrations of semivolatile organic compounds (SVOCs) in highway runoff and urban stormwater. To a lesser extent, studies also have characterized concentrations of volatile organic compounds (VOCs), estimated loads of SVOCs, and assessed potential impacts of these contaminants on receiving streams. This...
Water-quality data for 90 community water supply wells in New Jersey, 1994-95
R.M. Clawges, T.D. Oden, E. F. Vowinkel
1998, Open-File Report 97-625
Description of piezometers installed in the Duranes well field area, Albuquerque, New Mexico
C. R. Thorn
1998, Open-File Report 98-415
Since 1993, the aquifer system in the Middle Rio Grande Basin, and particularly in the Albuquerque area, has been the focus of studies to further define the extent of the most productive parts of the aquifer and to gain a better understanding of ground-water/surface-water interactions. Twenty-one piezometers were installed during...
Monitoring of Selected Water-Quality Constituents Near the Freshwater/Saline-Water Interface of the Edwards Aquifer, July 1996-December 1997
J.R. Cederberg, Patricia B. Ging, Robert T. Ourso
1998, Fact Sheet 103-98
The Edwards aquifer is the sole source of water for about 1.3 million people in and near San Antonio, Texas, as well as for ranchers and farmers throughout south-central Texas. Because of the demand for this resource, various studies have been conducted to better understand the Edwards aquifer and how...
Water-quality, bed-sediment, and biological data (October 1996 through September 1997) and statistical summaries of data for streams in the upper Clark Fork basin, Montana
K. A. Dodge, Michelle I. Hornberger, E.V. Axtmann
1998, Open-File Report 98-407
