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Publications

Read publications and other informational products to learn more about USGS science occurring in Region 6.

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Comparison of temperature, specific conductance, pH, and dissolved oxygen at selected basic fixed sites in south-central Texas, 1996-98 Comparison of temperature, specific conductance, pH, and dissolved oxygen at selected basic fixed sites in south-central Texas, 1996-98

One component of the surface-water part of the U.S. Geological Survey National Water-Quality Assessment Program is the use of continuous water-quality monitors to help characterize the spatial and temporal distribution of general water quality in relation to hydrologic conditions. During 1996-98, six continuous water-quality monitors in the South-Central Texas study unit collected water
Authors
Patricia B. Ging, Cassi L. Otero

Geologic framework and hydrogeologic characteristics of the Edwards aquifer, Uvalde County, Texas Geologic framework and hydrogeologic characteristics of the Edwards aquifer, Uvalde County, Texas

The Edwards aquifer in Uvalde County is composed of Lower Cretaceous carbonate (mostly dolomitic limestone) strata of the Devils River Formation in the Devils River trend and of the West Nueces, McKnight, and Salmon Peak Formations in the Maverick basin. Rocks in the Devils River trend are divided at the bottom of the Devils River Formation into the (informal) basal nodular unit...
Authors
Allan K. Clark

Occurrence of the diamondback terrapin (Malaclemys terrapin littoralis) at South Deer Island in Galveston Bay, Texas, April 2001-May 2002 Occurrence of the diamondback terrapin (Malaclemys terrapin littoralis) at South Deer Island in Galveston Bay, Texas, April 2001-May 2002

One-hundred thirty-five terrapins were captured (116 individuals, 19 recaptures) in occurrence and nesting and basking surveys at South Deer Island in Galveston Bay, Texas, during April 2001–May 2002. Along the southern shore of the island, terrapins were captured in crab traps placed in shallow water offshore; in the lagoon on the island, terrapins were captured by hand while walking...
Authors
Jennifer L. Hogan

Oxidation-reduction processes in ground water at Naval Weapons Industrial Reserve Plant, Dallas, Texas Oxidation-reduction processes in ground water at Naval Weapons Industrial Reserve Plant, Dallas, Texas

Concentrations of trichloroethene in ground water at the Naval Weapons Industrial Reserve Plant in Dallas, Texas, indicate three source areas of chlorinated solvents?building 1, building 6, and an off-site source west of the facility. The presence of daughter products of reductive dechlorination of trichloroethene, which were not used at the facility, south and southwest of the source...
Authors
S.A. Jones, Christopher L. Braun, Roger W. Lee

Estimating the susceptibility of surface water in Texas to nonpoint-source contamination by use of logistic regression modeling Estimating the susceptibility of surface water in Texas to nonpoint-source contamination by use of logistic regression modeling

In the State of Texas, surface water (streams, canals, and reservoirs) and ground water are used as sources of public water supply. Surface-water sources of public water supply are susceptible to contamination from point and nonpoint sources. To help protect sources of drinking water and to aid water managers in designing protective yet cost-effective and risk-mitigated monitoring...
Authors
William A. Battaglin, Randy L. Ulery, Thomas Winterstein, Toby Welborn

Water resources data Texas, water year 2002, volume 1. Arkansas River basin, Red River basin, Sabine River basin, Neches River basin, and intervening coastal basins Water resources data Texas, water year 2002, volume 1. Arkansas River basin, Red River basin, Sabine River basin, Neches River basin, and intervening coastal basins

Water-resources data for the 2002 water year for Texas are presented in six volumes and consist of records of stage, discharge, and water quality of streams and canals; stage, contents, and water quality of lakes and reservoirs; and water levels and water quality of ground-water wells. Volume 1 contains records for water discharge at 63 gaging stations; stage only at 3 gaging stations...
Authors
Susan C. Gandara

Water resources data Texas, water year 2003, volume 6. Ground water Water resources data Texas, water year 2003, volume 6. Ground water

Water-resources data for the 2003 water year for Texas consists of records of stage, discharge, and water quality of streams; stage and contents in lakes and reservoirs; and water levels and water quality in wells. Volume 6 contains water levels for 880 ground-water observation wells and water-quality data for 158 monitoring wells. These data represent that part of the National Water...
Authors
Dana L. Barbie

Assessment of selected water-quality data collected in the lower Red River (main stem) basin, Texas, 1997-98 Assessment of selected water-quality data collected in the lower Red River (main stem) basin, Texas, 1997-98

The Texas part of the Red River Basin has been divided into five reaches or subbasins (fig. 1) to facilitate improved planning, monitoring, geographical analysis, and dissemination of information. The U.S. Geological Survey (USGS), in cooperation with the Red River Authority of Texas, is studying the five subbasins, each for a period of about 1 year. Baldys and Phillips (1998) discuss...
Authors
Stanley Baldys, Danna K. Hamilton
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