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Page 406, results 10126 - 10150

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Not all publications have extents, not all extents are completely accurate
National water summary on wetland resources
1996, Water Supply Paper 2425
This National Water Summary on Wetland Resources documents wetland resources in the United States. It presents an overview of the status of knowledge of wetlands at the present time-what they are, where they are found, why they are important, and the controversies surrounding them, with an emphasis on their hydrology....
Water-quality assessment of the Trinity River Basin, Texas - Nutrients in two coastal prairie streams draining agricultural areas, 1994-95
Larry F. Land
1996, Open-File Report 96-558
In 1991, the U.S. Geological Survey (USGS) began nationwide implementation of the National Water-Quality Assessment (NAWQA) Program. Long-term goals of NAWQA are to describe the status of and trends in the quality of a large, representative part of the Nation?s surface- and ground-water resources and to provide a sound, scientific...
Geohydrology of stratified drift and streamflow in the Deerfield River basin, northwestern Massachusetts
P.J. Friesz
1996, Water-Resources Investigations Report 96-4115
This report presents the results of a study of the geohydrology of stratified drift and streamflow in the Deerfield River Basin, northwestern Massachusetts. Detailed hydrologic information is needed to plan for the optimal use of ground-water and surface-water resources and for development of new drinking-water supplies in the basin. Sources...
U.S. Geological Survey programs in Texas
Water Resources Division, U.S. Geological Survey
1996, Fact Sheet 043-96
The U.S. Geological Survey (USGS) is the Federal Government's primary source of data on the quantity and quality of the Nation's water resources, its principal civilian map making agency, and its primary provider of information on natural hazards and mineral, energy, and biological resources. The USGS makes unbiased scientific information...
A three-dimensional method-of-characteristics solute-transport model (MOC3D)
Leonard F. Konikow, D.J. Goode, G.Z. Hornberger
1996, Water-Resources Investigations Report 96-4267
This report presents a model, MOC3D, that simulates three-dimensional solute transport in flowing ground water. The model computes changes in concentration of a single dissolved chemical constituent over time that are caused by advective transport, hydrodynamic dispersion (including both mechanical dispersion and diffusion), mixing (or dilution) from fluid sources, and...
Geochemistry and isotope hydrology of representative aquifers in the Great Basin region of Nevada, Utah, and adjacent states
J. M. Thomas, A. H. Welch, M. D. Dettinger
1996, Professional Paper 1409-C
This report briefly describes the general quality and chemical character of the ground water, discusses in detail the geochemical and hydrologic processes that produce the chemical and isotopic compositions of water in the two principal types of aquifers (basin fill and carbonate rock), delineates flow systems in carbonate-rock aquifers of...
Summary of biological and contaminant investigations related to stream water quality and environmental setting in the Upper Colorado River basin, 1938-95
Jeffrey R. Deacon, Verlin C. Stephens
1996, Water-Resources Investigations Report 96-4172
As part of the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) program, an inventory of the biological and contaminant investigations for the Upper Colorado River Basin study unit was conducted. To enhance the sampling design for the biological component of the program, previous studies about the ecology of aquatic organisms...
Analysis of regional aquifers in the central Midwest of the United States in Kansas, Nebraska, and parts of Arkansas, Colorado, Missouri, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming: Summary
Donald G. Jorgensen, J. O. Helgesen, D. C. Signor, R. B. Leonard, J. L. Imes, S. C. Christenson
1996, Professional Paper 1414-A
Large quantities of ground water are available for use from three regional aquifer systems in the central Midwest of the United States. Parts of the lowermost aquifer contain nearly immobile brine and may be hydrologically suitable for material storage or waste disposal. Results of numerical modeling and geochemical analyses confirm...
Detailed study of selenium and other constituents in water, bottom sediment, soil, alfalfa, and biota associated with irrigation drainage in the Uncompahgre Project area and in the Grand Valley, west-central Colorado, 1991-93
D. L. Butler, W. G. Wright, K. C. Stewart, B. C. Osmundson, R. P. Krueger, D.W. Crabtree
1996, Water-Resources Investigations Report 96-4138
In 1985, the U.S. Department of the Interior began a program to study the effects of irrigation drainage in the Western United States. These studies were done to determine whether irrigation drainage was causing problems related to human health, water quality, and fish and wildlife resources. Results of a study...
Estimation of the recharge areas contributing water to the South Well Field, Columbus, Ohio
C. W. Schalk
1996, Water-Resources Investigations Report 96-4039
The city of Columbus, Ohio, operates four radial collector wells, designed to yield 42 Mgal/d (million gallons per day), in southern Franklin County, Ohio, as part of their municipal supply of water. The collector wells are adjacent to, and designed to induce infiltration from, Big Walnut Creek and Scioto River....
Status of ground-water resources at U.S. Navy Support Facility, Diego Garcia; summary of hydrologic and climatic data, January 1994 through September 1996
J.D. Torikai
1996, Open-File Report 96-660
This report describes the status of ground-water resources at U.S. Navy Support Facility, Diego Garcia. Data presented are from January 1994 through September 1996, with a focus on data from July through September 1996 (third quarter of 1996). A complete database of ground-water withdrawals and chloride-concentration records since 1985 is...
Nutrient sources and analysis of nutrient water-quality data, Apalachicola-Chattahoochee-Flint River basin, Georgia, Alabama, and Florida, 1972-90
Elizabeth A. Frick, Gary R. Buell, Evelyn H. Hopkins
1996, Water-Resources Investigations Report 96-4101
In 1991, the U.S. Geological Survey began full-scale implementation of the National Water-Quality Assessment (NAWQA) program. One of the initial tasks of the NAWQA program is to compile and evaluate existing data from individual study units. Available nutrient data from 1972 through 1990 water years were used to estimate nutrient...
Ground-water hydrology, historical water use, and simulated ground-water flow in Cretaceous-age Coastal Plain aquifers near Charleston and Florence, South Carolina
B. G. Campbell, Marijke van Heeswijk
1996, Water-Resources Investigations Report 96-4050
A quasi-three-dimensional, transient, digital, ground-water flow model representing the Coastal Plain aquifers of South Carolina, has been constructed to assist in defining the ground- water-flow system of Cretaceous aquifers near Charleston and Florence, S.C. Both cities are near the centers of large (greater than 150 feet) potentiometric declines in the...
Hydrogeology and simulation of ground-water flow, Picatinny Arsenal and vicinity, Morris County, New Jersey
L. M. Voronin, D.E. Rice
1996, Water-Resources Investigations Report 96-4061
Ground-water flow in glacial sediments and bedrock at Picatinny Arsenal, N.J., was simulated by use of a three-dimensional finite-difference ground- water-flow model. The modeled area includes a 4.3-square-mile area that extends from Picatinny Lake to the Rockaway River. Most of the study area is bounded by the natural hydrologic boundaries...
Influences of environmental settings on aquatic ecosystems in the Apalachicola-Chattahoochee-Flint River basin
C. A. Couch, E. H. Hopkins, P. S. Hardy
1996, Water-Resources Investigations Report 95-4278
The watershed boundary of the Apalachicola-Chattahoochee-Flint (ACF) River basin defines an aquatic ecosystem whose water quality is the result of complex interactions of natural and human influences on land and water resources. Topics relating to the basin's environmental setting-its physical, biological, and cultural characteristics-are summarized to provide an understanding of...
Digital geologic map of McAlester-Texarkana quadrangles, southeastern Oklahoma
J. R. Cederstrand
1996, Open-File Report 96-377
This data set consists of digital data and accompanying documentation of the surficial geology of the 1:250,000-scale McAlester and Texarkana quadrangles, Oklahoma. The original data are from the Geologic Map, sheet 1 of 4, included in Oklahoma Geological Survey publication, Reconnaissance of the water resources of the McAlester and Texarkana...
Ground-water resources of the lower Apalachicola-Chattahoochee-Flint River basin in parts of Alabama, Florida, and Georgia — Subarea 4 of the Apalachicola-Chattahoochee-Flint and Alabama-Coosa-Tallapoosa River basins
Lynn J. Torak, Robin John McDowell
1996, Open-File Report 95-321
The study area is underlain by Coastal Plain sediments of pre-Cretaceous to Quaternary age consisting of alternating units of sand, clay, sandstone, dolomite, and limestone that gradually thicken and dip gently to the southeast. The Upper Floridan aquifer is composed of an off lapping sequence of clastic and carbonate sediments...
Digital geologic map of Tulsa quadrangle, northeastern Oklahoma
J. R. Cederstrand
1996, Open-File Report 96-380
This data set consists of digital data and accompanying documentation of the surficial geology of the 1:250,000-scale Tulsa quadrangle, Oklahoma. The original data are from the Geologic Map, sheet 1 of 4, included in the Oklahoma Geological Survey publication, 'Reconnaissance of the water resources of the Tulsa quadrangle, northeastern Oklahoma',...
Digital geologic map of Woodward Quadrangle, south-central Oklahoma
J. R. Cederstrand
1996, Open-File Report 96-381
This data set consists of digital data and accompanying documentation for the surficial geology of the 1:250,000-scale Woodward quadrangle. The original data are from the Geologic Map, sheet 1 of 4, included in the Oklahoma Geological Survey publication, Reconnaissance of the water resources of the Woodward quadrangle, northwestern Oklahoma, Hydrologic...