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Page 1767, results 44151 - 44175

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Approximate water-level changes in wells completed in the Chicot and Evangeline aquifers, 1977-91 and 1990-91, and measured compaction, 1973-90, in the Houston-Galveston region, Texas
Dana L. Barbie, M. C. Kasmarek, Al Campodonico
1991, Open-File Report 91-94
This report is one in a series of reports that depict water-level changes and compaction of subsurface material in the Houston-Galveston region. The maps present approximate water-level changes in wells in the Chicot and Evangeline aquifers, 1977-91 and 1990-91 (figs. 1-4). The location of borehole extensometers is shown in figure...
Geohydrology of Mesozoic rocks in the upper Colorado River basin in Arizona, Colorado, New Mexico, Utah, and Wyoming, excluding the San Juan Basin
Geoffrey W. Freethey, Gail E. Cordy
1991, Professional Paper 1411-C
The purpose of this report is to provide a quantitative analysis of the occurrence, movement, and quality of water and the hydrologic characteristics of aquifers and confining units in the Mesozoic rocks of the Upper Colorado River Basin. The analysis is regional in scope and, hence, does not address site-specific...
Definitions of database files and fields of the Personal Computer-Based Water Data Sources Directory
J. Wayne Green
1991, Open-File Report 91-184
This report describes the data-base files and fields of the personal computer-based Water Data Sources Directory (WDSD). The personal computer-based WDSD was derived from the U.S. Geological Survey (USGS) mainframe computer version. The mainframe version of the WDSD is a hierarchical data-base design. The personal computer-based WDSD is a relational...
Hydrology of Lakes Clara and Vandercook in north-central Wisconsin
D.A. Wentz, W. J. Rose
1991, Water-Resources Investigations Report 89-4204
Lakes Clara and Vandercook are 33- and 43-hectare lakes, respectively, located in predominantly sandy outwash in north-central Wisconsin. Annual precipitation at National Weather Service stations during the 1951-80 calendar years averaged 794 millimeters near Lake Clara and 834 millimeters near Vandercook Lake. During the 1981 water year, annual precipitation measured...
Simulation of ground-water flow in the coastal plain aquifer system of North Carolina
G. L. Giese, J. L. Eimers, R. W. Coble
1991, Open-File Report 90-372
A 3-D finite difference digital model was used to simulate groundwater flow in the 25,000 sq mi aquifer system of the North Carolina Coastal Plain. The model was developed from a geohydrologic framework that is based on an alternating sequence of 10 aquifers and 9 confining units, which comprise a...
Hydrogeology and ground-water flow in the carbonate rocks of the Little Lehigh Creek basin, Lehigh County, Pennsylvania
R. A. Sloto, L.D. Cecil, L.A. Senior
1991, Water-Resources Investigations Report 90-4076
The Little Lehigh Creek basin is underlain mainly by a complex assemblage of highly-deformed Cambrian and Ordovician carbonate rocks. The Leithsville Formation, Allentown Dolomite, Beekmantown Group, and Jacksonburg Limestone act as a single hydrologic unit. Ground water moves through fractures and other secondary openings and generally is under water-table conditions....
Soil water and vegetation responses to precipitation and changes in depth to ground water in Owens Valley, California
Stephen K. Sorenson, Peter D. Dileanis, Farrel A. Branson
1991, Water Supply Paper 2370-G
Vegetation on the floor of Owens Valley, California, is composed predominantly of phreatophytic desert communities that are adapted to small quantities of precipitation and alkaline soils. These plant communities are believed to be dependent on the continuing presence of a shallow water table. Maintaining existing plant communities is important to...
Computer software for converting ground-water and water-quality data from the National Water Information System for use in a geographic information system
J. C. Scott
1991, Water-Resources Investigations Report 90-4200
A geographic information system (GIS) is computer software that provides the capabilities to rapidly display and analyze spatially referenced data. To use a GIS efficiently, software is needed that provides a link between existing spatially referenced data-base systems and the GIS. The U.S. Geological Survey (USGS) stores large amounts of spatially...