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Page 3318, results 82926 - 82950

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Streamflow, base flow, and ground-water recharge in the Housatonic River basin, western Massachusetts and parts of eastern New York and northwestern Connecticut
Gardner C. Bent
1999, Water-Resources Investigations Report 98-4232
Streamflows for selected flow durations from 1 to 99 percent and the August median streamflows were estimated for 11 long-term streamflow-gaging stations in and near the study area. Estimates of streamflow and associated standard errors were determined for selected flow durations from 50 to 99 percent and the August median...
Precipitation, atmospheric deposition, streamflow, and water-quality data from selected sites in the city of Charlotte and Mecklenburg County, North Carolina, 1997–98
Kathleen M. Sarver, W. F. Hazell, J. B. Robinson
1999, Open-File Report 99-273
Precipitation data were collected at 46 precipitation sites and 3 atmospheric deposition sites, and hydrologic data were collected at 6 stream sites in the vicinity of Charlotte and Mecklenburg County, North Carolina, from July 1997 through September 1998. Data were collected to identify the type, concentration, and amount of nonpoint-source...
US Geological Survey nutrient preservation experiment: Experimental design, statistical analysis, and interpretation of analytical results
Charles J. Patton, Edward J. Gilroy
1999, Water-Resources Investigations Report 98-4118
This report describes the experimental details and interprets results from a study conducted by the U.S. Geological Survey (USGS) in 1992 to assess the effect of different sample-processing treatments on the stability of eight nutrient species in samples of surface-, ground-, and municipal-supply water during storage at 4 degrees Celsius...
Surficial geology and distribution of post-impoundment sediment of the western part of Lake Mead based on a sidescan sonar and high-resolution seismic-reflection survey
David C. Twichell, VeeAnn A. Cross, Mark J. Rudin, Kenneth F. Parolski
1999, Open-File Report 99-581
Sidescan sonar imagery and high-resolution seismic-reflection profiles were collected in Las Vegas Bay and Boulder Basin of Lake Mead to determine the surficial geology as well as the distribution and thickness of sediment that has accumulated in these areas of the lake since the completion of Hoover Dam in 1935...
U.S. Geological Survey Toxic Substances Hydrology Program: Proceedings of the technical meeting, Charleston, South Carolina, March 8-12, 1999: Volume 1 (Part A)
David W. Morganwalp, Herbert T. Buxton, editor(s)
1999, Water-Resources Investigations Report 99-4018-A
This report contains papers presented at the seventh Technical Meeting of the U.S. Geological Survey (USGS), Toxic Substances Hydrology (Toxics) Program. The meeting was held March 8-12, 1999, in Charleston, South Carolina. Toxics Program Technical Meetings are held periodically to provide a forum for presentation and discussion of results of...
Distribution of Trichloroethylene and Geologic Controls on Contaminant Pathways near the Royal River, McKin Superfund Site Area, Gray, Maine
Forest P. Lyford, L.E. Flight, Janet Radway Stone, Scott Clifford
1999, Water-Resources Investigations Report 99-4125
Vapor-diffusion samplers were used in the autumn of 1997 to determine the lateral extent and distribution of concentrations of a trichloroethylene (TCE) plume in the ground-water discharge area near the McKin Superfund Site, Gray, Maine. Analyses of vapor in the samplers identified a plume about 800 feet wide entering the...
Surface-water-quality assessment of the Yakima River basin, Washington: Overview of major findings, 1987-91
Jennifer L. Morace, Gregory J. Fuhrer, Joseph F. Rinella, Stuart W. McKenzie, Marshall W. Gannett, Karen L. Bramblett, Ted R. Pogue Jr., Kenneth A. Skach, Sandra S. Embrey, Thomas F. Cuffney, Michael R. Meador, Stephen D. Porter, Martin E. Gurtz
1999, Water-Resources Investigations Report 98-4113
Surface-water-quality conditions were assessed in the Yakima River Basin, which drains 6,155 square miles of mostly forested, range, and agricultural land in Washington. The Yakima River Basin is one of the most intensively farmed and irrigated areas in the United States, and is often referred to as the “Nation’s Fruitbowl.”...
Quantification of metal loading in Fisher Creek by tracer injection and synoptic sampling, Park County, Montana, August 1997
Briant A. Kimball, David A. Nimick, Linda J. Gerner, Robert L. Runkel
1999, Water-Resources Investigations Report 99-4119
Acid mine drainage from abandoned and inactive mines affects the water quality of the upper reaches of Fisher Creek, Montana. A sodium chloride tracer was added to the stream for 29.5 hours to provide a hydrologic context for synoptic sampling of metal chemistry in the stream and its inflows. The...
Estimating the magnitude and frequency of floods in rural basins of North Carolina
Benjamin F. Pope, Gary D. Tasker
1999, Water-Resources Investigations Report 99-4114
A statewide study was conducted to develop two methods for estimating the magnitude and frequency of floods in rural ungaged basins in North Carolina. Flood-frequency estimates for gaged sites in North Carolina were computed by fitting the annual peak flows for each site to a log-Pearson Type III distribution. As...
Precipitation-runoff, suspended-sediment, and flood-frequency characteristics for urbanized areas of Elmendorf Air Force Base, Alaska
Timothy P. Brabets
1999, Water-Resources Investigations Report 98-4265
The developed part of Elmendorf Air Force Base near Anchorage, Alaska, consists of two basins with drainage areas of 4.0 and 0.64 square miles, respectively. Runoff and suspended-sediment data were collected from August 1996 to March 1998 to gain a basic understanding of the surface-water hydrology of these areas and...
Ground-water data in Orange County and adjacent counties, Texas, 1985-90
Mark C. Kasmarek
1999, Open-File Report 99-603
The lower unit of the Chicot aquifer is a major source of freshwater for Orange County, Texas. In 1989, the average rate of ground-water withdrawal from the lower unit of the Chicot aquifer in Orange County for municipal and industrial use was 13.8 million gallons per day, a substantial decrease...
Use of environmental tracers to evaluate ground-water age and water-quality trends in a buried-valley aquifer, Dayton area, southwestern Ohio
Gary L. Rowe, Stephanie Dunkle Shapiro, Peter Schlosser
1999, Water-Resources Investigations Report 99-4113
Chlorofluorocarbons (CFC method) and tritium and helium isotopes (3H-3He method) were used as environmental tracers to estimate ground-water age in conjunction with efforts to develop a regional ground-water flow model of the buried-valley aquifer in the Dayton area, southwestern Ohio. This report describes results of CFC and water-quality sampling, summarizes...
Great Salt Lake, Utah
Doyle W. Stephens, Joe F. Gardner
1999, Water-Resources Investigations Report 1999-4189
This document is intended as a source of general information and facts about Great Salt Lake, Utah. This U.S. Geological Survey information sheet answers frequently asked questions about Great Salt Lake. Topics include: History, salinity, brine shrimp, brine flies, migratory birds, and recreation. Great Salt Lake, the shrunken remnant of...
A total petroleum system of the Browse Basin, Australia; Late Jurassic, Early Cretaceous-Mesozoic
M.G. Bishop
1999, Open-File Report 99-50-I
The Browse Basin Province 3913, offshore northern Australia, contains one important petroleum system, Late Jurassic, Early Cretaceous-Mesozoic. It is comprised of Late Jurassic through Early Cretaceous source rocks deposited in restricted marine environments and various Mesozoic reservoir rocks deposited in deep-water fan to fluvial settings. Jurassic age intraformational shales and...
Investigation of the distribution of organochlorine and polycyclic aromatic hydrocarbon compounds in the Lower Columbia River using semipermeable-membrane devices
Kathleen A. McCarthy, Robert W. Gale
1999, Water-Resources Investigations Report 99-4051
Organochlorine and polycyclic aromatic hydrocarbon compounds are of concern in the Columbia River Basin because of their adverse effects on fish and wildlife. Because these compounds can have important biological consequences at concentrations well below the detection limits associated with conventional water-sampling techniques, we used semipermeable membrane devices (SPMDs) to...
Geohydrology of monitoring wells drilled in Oasis Valley near Beatty, Nye County, Nevada, 1997
Armando R. Robledo, Philip L. Ryder, Joseph M. Fenelon, Frederick L. Paillet
1999, Water-Resources Investigations Report 98-4184
Twelve monitoring wells were installed in 1997 at seven sites in and near Oasis Valley, Nevada. The wells, ranging in depth from 65 to 642 feet, were installed to measure water levels and to collect water-quality samples. Well-construction data and geologic and geophysical logs are presented in this report. Seven...