Unified Interior Regions
Region 6: Arkansas-Rio Grande-Texas-Gulf
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An 80-year record of sediment quality in the lower Mississippi River
In 1937, the US Army Corps of Engineers cut through the "neck" of a large meander on the lower Mississippi River (below the confluence with the Ohio River) forming the Caulk Neck cutoff and creating Lake Whittington, a 26-km long oxbow lake, in northern Mississippi. Since 1938, seasonal flooding and a boat channel connecting the lake with the...
Van Metre, Peter C.; Horowitz, Arthur J. Predicting ecological flow regime at ungaged sites: A comparison of methods
Nineteen ecologically relevant streamflow characteristics were estimated using published rainfall–runoff and regional regression models for six sites with observed daily streamflow records in Kentucky. The regional regression model produced median estimates closer to the observed median for all but two characteristics. The variability of...
Murphy, Jennifer C.; Knight, Rodney R.; Wolfe, William J.; Gain, W. Scott GeoChip-based analysis of microbial functional gene diversity in a landfill leachate-contaminated aquifer
The functional gene diversity and structure of microbial communities in a shallow landfill leachate-contaminated aquifer were assessed using a comprehensive functional gene array (GeoChip 3.0). Water samples were obtained from eight wells at the same aquifer depth immediately below a municipal landfill or along the predominant downgradient...
Lu, Zhenmei; He, Zhili; Parisi, Victoria A.; Kang, Sanghoon; Deng, Ye; Van Nostrand, Joy D.; Masoner, Jason R.; Cozzarelli, Isabelle M.; Suflita, Joseph M.; Zhou, Jizhong
Shallow groundwater quality and geochemistry in the Fayetteville Shale gas-production area, north-central Arkansas, 2011
The Mississippian Fayetteville Shale serves as an unconventional gas reservoir across north-central Arkansas, ranging in thickness from approximately 50 to 550 feet and varying in depth from approximately 1,500 to 6,500 feet below the ground surface. Primary permeability in the Fayetteville Shale is severely limited, and successful extraction of...
Kresse, Timothy M.; Warner, Nathaniel R.; Hays, Phillip D.; Down, Adrian; Vengosh, Avner; Jackson, Robert B. Emerging contaminants at a closed and an operating landfill in Oklahoma
Landfills are the final depositories for a wide range of solid waste from both residential and commercial sources, and therefore have the potential to produce leachate containing many organic compounds found in consumer products such as pharmaceuticals, plasticizers, disinfectants, cleaning agents, fire retardants, flavorings, and preservatives,...
Andrews, William J.; Masoner, Jason R.; Cozzarelli, Isabelle M.
Borehole geophysical, fluid, and hydraulic properties within and surrounding the freshwater/saline-water transition zone, San Antonio segment of the Edwards aquifer, south-central Texas, 2010-11
The freshwater zone of the San Antonio segment of the Edwards aquifer is used by residents of San Antonio and numerous other rapidly growing communities in south-central Texas as their primary water supply source. This freshwater zone is bounded to the south and southeast by a saline-water zone with an intermediate zone transitioning from...
Thomas, Jonathan V.; Stanton, Gregory P.; Lambert, Rebecca B.
Surface-water quality in the upper San Antonio River Basin, Bexar County, Texas, 1992-98
The potential effects of chemicals in rivers and streams on human health or the ecology have long been a source of concern to water managers. Chemicals in rivers may result from natural or anthropogenic sources (such as industrial or residential practices) which are commonly associated with urbanized watersheds. The U.S. Geological Survey, in...
Banta, J. Ryan; Slattery, Richard N.; Crow, Cassi L.
Groundwater levels and water-quality observations pertaining to the Austin Group, Bexar County, Texas, 2009-11
The U.S. Geological Survey, in cooperation with the San Antonio Water System, examined groundwater-level altitudes (groundwater levels) and water-quality data pertaining to the Austin Group in Bexar County, Texas, during 2009–11. Hydrologic data collected included daily mean groundwater levels collected at seven sites in the study area....
Banta, J.R.; Clark, Allan K.
Quality of surface-water runoff in selected streams in the San Antonio segment of the Edwards aquifer recharge zone, Bexar County, Texas, 1997-2012
During 1997–2012, the U.S. Geological Survey, in cooperation with the San Antonio Water System, collected and analyzed water-quality constituents in surface-water runoff from five ephemeral stream sites near San Antonio in northern Bexar County, Texas. The data were collected to assess the quality of surface water that recharges the Edwards...
Opsahl, Stephen P.
Water-level altitudes and continuous and discrete water quality at and near an aquifer storage and recovery site, Bexar, Atascosa, and Wilson Counties, Texas, June 2004-September 2011
The U.S. Geological Survey (USGS), in cooperation with the San Antonio Water System (SAWS), collected data during 2004–11 to characterize the quality of native groundwater from the San Antonio segment of the Edwards aquifer (hereinafter, Edwards aquifer) and preinjection and postinjection water from the Carrizo aquifer (informal name...
Crow, Cassi L.
Simulated effects of hydrologic, water quality, and land-use changes of the Lake Maumelle watershed, Arkansas, 2004–10
Lake Maumelle, located in central Arkansas northwest of the cities of Little Rock and North Little Rock, is one of two principal drinking-water supplies for the Little Rock, and North Little Rock, Arkansas, metropolitan areas. Lake Maumelle and the Maumelle River (its primary tributary) are more pristine than most other reservoirs and streams in...
Hart, Rheannon M.; Green, W. Reed; Westerman, Drew A.; Petersen, James C.; DeLanois, Jeanne L. Cancer risk from incidental ingestion exposures to PAHs associated with coal-tar-sealed pavement
Recent (2009-10) studies documented significantly higher concentrations of polycyclic aromatic hydrocarbons (PAHs) in settled house dust in living spaces and soil adjacent to parking lots sealed with coal-tar-based products. To date, no studies have examined the potential human health effects of PAHs from these products in dust and soil. Here we...
Williams, E. Spencer; Mahler, Barbara; Van Metre, Peter C.
Early USGS streamgage on the San Saba river in Texas
An early streamgage is used to measure water levels on San Saba River. USGS crews would visit this equipment to collect water level readings.
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Locations
Region 6: Arkansas-Rio Grande-Texas-Gulf
Texas Water Science Center
Phone: (512) 927-3500
Fax: (512) 927-3590
Oklahoma Water Science Center
Phone: 405-810-4400
Fax: 405-843-7712
South Central Climate Adaptation Science Center
Woodward Field Office
Phone: 580-256-5031
Tulsa Field Office
Phone: 918-254-6651
Lubbock Field Office
Phone: (806) 742-3129
Fax: (806) 742-0100
Gulf Coast Branch (Houston) Office
Phone: (936) 271-5300
Fax: (936) 271-5399
Wichita Falls Field Office
Phone: (940) 397-4453
North Texas Branch (Fort Worth) Office
Phone: (817) 263-9545
Fax: (682) 316-5022
El Paso Field Office
Phone: (915) 534-6308
Fax: (915) 534-6299
San Angelo Field Office
Phone: (325) 944-4600
Fax: (325) 942-0495
Corpus Christi Field Office
Phone: (361) 825-2073
Fax: (361) 825-2025
South Texas Branch (San Antonio) Office
Phone: (210) 691-9200
Fax: (210) 691-9270