Unified Interior Regions

Region 6: Arkansas-Rio Grande-Texas-Gulf

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Filter Total Items: 1,620
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Year Published: 2014

Effects of hydrologic modifications on salinity and formation of hypoxia in the Mississippi River-Gulf Outlet and adjacent waterways, southeastern Louisiana, 2008 to 2012

The Mississippi River-Gulf Outlet (MRGO) was constructed between 1958 and 1968 to provide a safer and shorter route between the Gulf of Mexico and the Port of New Orleans for ocean-going vessels. In 2006, the U.S. Congress directed the U.S. Army Corps of Engineers (USACE) to develop and implement a plan to deauthorize a portion of the MRGO ship...

Swarzenski, Christopher M.; Mize, Scott V.
Effects of hydrologic modifications on salinity and formation of hypoxia in the Mississippi River-Gulf Outlet and adjacent waterways, southeastern Louisiana, 2008 to 2012; 2014; SIR; 2014-5077; Swarzenski, Christopher M.; Mize, Scott V.

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Year Published: 2014

Mesohabitats, fish assemblage composition, and mesohabitat use of the Rio Grande silvery minnow over a range of seasonal flow regimes in the Rio Grande/Rio Bravo del Norte, in and near Big Bend National Park, Texas, 2010-11

In 2010–11, the U.S. Geological Survey (USGS), in cooperation with the U.S. Fish and Wildlife Service, evaluated the physical characteristics and fish assemblage composition of mapped river mesohabitats at four sites on the Rio Grande/Rio Bravo del Norte (hereinafter Rio Grande) in and near Big Bend National Park, Texas. The four sites used...

Moring, J. Bruce; Braun, Christopher L.; Pearson, Daniel K.
Mesohabitats, fish assemblage composition, and mesohabitat use of the Rio Grande silvery minnow over a range of seasonal flow regimes in the Rio Grande/Rio Bravo del Norte, in and near Big Bend National Park, Texas, 2010-11; 2014; SIR; 2013-5210; Moring, J. Bruce; Braun, Christopher L.; Pearson, Daniel K.

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Year Published: 2014

Influences of water and sediment quality and hydrologic processes on mussels in the Clinch River

Segments of the Clinch River in Virginia have experienced declining freshwater mussel populations during the past 40 years, while other segments of the river continue to support some of the richest mussel communities in the country. The close proximity of these contrasting reaches provides a study area where differences in climate, hydrology...

Johnson, Gregory C.; Krstolic, Jennifer L.; Ostby, Brett J.K.

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Year Published: 2014

Arkansas Groundwater-Quality Network

Arkansas is the fourth largest user of groundwater in the United States, where groundwater accounts for two-thirds of the total water use. Groundwater use in the State increased by 510 percent between 1965 and 2005 (Holland, 2007). The Arkansas Groundwater-Quality Network is a Web map interface (http://ar.water.usgs.gov/wqx) that provides rapid...

Pugh, Aaron L.; Jackson, Barry T.; Miller, Roger
Arkansas Groundwater-Quality Network; 2014; FS; 2013-3042; Pugh, Aaron L.; Jackson, Barry T.; Miller, Roger

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Year Published: 2014

Geology and hydrostratigraphy of Guadalupe River State Park and Honey Creek State Natural Area, Kendall and Comal Counties, Texas

Hydrogeologic mapping and descriptions of the lithostratigraphy and hydrostratigraphy of Guadalupe River State Park and Honey Creek State Natural Area, Kendall and Comal Counties, Texas, are presented in this first detailed 1:24,000 geologic map, along with proposed names and descriptions of the hydrostratigraphic units in the study area....

Clark, Allan K.; Blome, Charles D.; Morris, Robert R.
Geology and hydrostratigraphy of Guadalupe River State Park and Honey Creek State Natural Area, Kendall and Comal Counties, Texas; 2014; SIM; 3303; Clark, Allan K.; Blome, Charles D.; Morris, Robert R.

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Year Published: 2014

Hydrogeologic aspects of the Knippa Gap area in eastern Uvalde and western Medina counties, Texas

The Edwards aquifer is the primary source of potable water for the San Antonio area in south-central Texas. The Knippa Gap area is a structural low (trough) postulated to channel or restrict flow in the Edwards aquifer in eastern Uvalde and western Medina Counties, Tex. To better understand the function of the Knippa Gap, the U.S. Geological...

Lambert, Rebecca B.; Clark, Allan K.; Pedraza, Diana E.; Morris, Robert R.
Hydrogeologic aspects of the Knippa Gap area in eastern Uvalde and western Medina counties, Texas; 2014; FS; 2014-3045; Lambert, Rebecca B.; Clark, Allan K.; Pedraza, Diana E.; Morris, Robert R.

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Year Published: 2014

Hydrologic data for the Obed River watershed, Tennessee

The Obed River watershed drains a 520-square-mile area of the Cumberland Plateau physiographic region in the Tennessee River basin. The watershed is underlain by conglomerate, sandstone, and shale of Pennsylvanian age, which overlie Mississippian-age limestone. The larger creeks and rivers of the Obed River system have eroded gorges through the...

Knight, Rodney R.; Wolfe, William J.; Law, George S.
Hydrologic data for the Obed River watershed, Tennessee; 2014; OFR; 2014-1102; Knight, Rodney R.; Wolfe, William J.; Law, George S.

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Year Published: 2014

Evaluation of groundwater and surface-water interactions in the Caddo Nation Tribal Jurisdictional Area, Caddo County, Oklahoma, 2010-13

Streamflows, springs, and wetlands are important natural and cultural resources to the Caddo Nation. Consequently, the Caddo Nation is concerned about the vulnerability of the Rush Springs aquifer to overdrafting and whether the aquifer will continue to be a viable source of water to tribal members and other local residents in the future. Interest...

Mashburn, Shana L.; Smith, S. Jerrod
Evaluation of groundwater and surface-water interactions in the Caddo Nation Tribal Jurisdictional Area, Caddo County, Oklahoma, 2010-13; 2014; SIR; 2014-5082; Mashburn, Shana L.; Smith, S. Jerrod

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Year Published: 2014

Concentrations of polycyclic aromatic hydrocarbons (PAHs) and azaarenes in runoff from coal-tar- and asphalt-sealcoated pavement

Coal-tar-based sealcoat, used extensively on parking lots and driveways in North America, is a potent source of PAHs. We investigated how concentrations and assemblages of PAHs and azaarenes in runoff from pavement newly sealed with coal-tar-based (CT) or asphalt-based (AS) sealcoat changed over time. Samples of simulated runoff were collected...

Mahler, Barbara; Van Metre, Peter C.; Foreman, William T.
Concentrations of polycyclic aromatic hydrocarbons (PAHs) and azaarenes in runoff from coal-tar- and asphalt-sealcoated pavement; 2014; Article; Journal; Environmental Pollution; Mahler, Barbara J.; Van Metre, Peter C.; Foreman, William T.

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Year Published: 2014

Mobile terrestrial light detection and ranging (T-LiDAR) survey of areas on Dauphin Island, Alabama, in the aftermath of Hurricane Isaac, 2012

Topographic survey data of areas on Dauphin Island on the Alabama coast were collected using a truck-mounted mobile terrestrial light detection and ranging system. This system is composed of a high frequency laser scanner in conjunction with an inertial measurement unit and a position and orientation computer to produce highly accurate topographic...

Kimbrow, Dustin R.
Mobile terrestrial light detection and ranging (T-LiDAR) survey of areas on Dauphin Island, Alabama, in the aftermath of Hurricane Isaac, 2012; 2014; DS; 855; Kimbrow, Dustin R.

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Year Published: 2014

Water resources of Acadia Parish, Louisiana

Information concerning the availability, use, and quality of water in Acadia Parish, Louisiana, is critical for proper water-supply management. The purpose of this fact sheet is to present information that can be used by water managers, parish residents, and others for stewardship of this vital resource. Information on the availability, past and...

Prakken, Larry B.; White, Vincent E.
Water resources of Acadia Parish, Louisiana; 2014; FS; 2014-3043; Prakken, Larry B.; White, Vincent E.

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Year Published: 2014

Water quality of potential reference lakes in the Arkansas Valley and Ouachita Mountain ecoregions, Arkansas

This report describes a study to identify reference lakes in two lake classifications common to parts of two level III ecoregions in western Arkansas—the Arkansas Valley and Ouachita Mountains. Fifty-two lakes were considered. A screening process that relied on land-use data was followed by reconnaissance water-quality sampling, and two...

Justus, B.G.; Meredith, Bradley J.

Filter Total Items: 266
Travertine deposits near site 4 (Post Oak Falls near Tow, Texas, October 31, 2012).
October 31, 2012

Travertine deposits, Post Oak Falls near Tow, Texas

Travertine deposits near site 4 (Post Oak Falls near Tow, Texas, October 31, 2012) (photograph by Jennifer Wilson, U.S. Geological Survey).

SIR 2015–5098

Faulting in limestone outcrop downstream from where Greenwood Creek flows into the Colorado River.
October 31, 2012

Faulting in limestone outcrop, Greenwood Creek

Faulting in limestone outcrop downstream from where Greenwood Creek flows into the Colorado River, October 31, 2012 (photograph by Jennifer Wilson, U.S. Geological Survey).

SIR 2015–5098

Seeps along limestone outcrop downstream from where Jim John Creek flows into the Colorado River
October 31, 2012

Seeps along limestone outcrop, Jim John Creek

Seeps along limestone outcrop downstream from where Jim John Creek flows into the Colorado River, October 31, 2012 (photograph by Jennifer Wilson, U.S. Geological Survey).

SIR 2015–5098

Sam Rayburn Lake, September 2012
September 18, 2012

Sam Rayburn Lake

Sam Rayburn Lake, September 2012. Photograph by David LaRue, U.S. Army Corps of Engineers.

SIR 2012–5202

Granger Lake, September 2012
September 12, 2012

Granger Lake

Granger Lake, September 2012. Photograph by Ben Bohac, U.S. Army Corps of Engineers.

SIR 2012–5202

Exposed Austin Group in road cut excavation located on south side of U.S. Highway 90.
May 29, 2012

Austin Chalk roadcut

Exposed Austin Group in road cut excavation located on south side of U.S. Highway 90 and approximately midway between Sabinal and Knippa Texas, eastern Uvalde County, Tex. Photograph taken May 29, 2012.

SIR 2013–5149

Sandstone ledges in the Escondido Formation located approximately 7 miles south-southeast of the community of D’Hanis in Medina.
April 13, 2012

Sandstone ledges, Escondido Formation, Medina County

Sandstone ledges in the Escondido Formation located approximately 7 miles south-southeast of the community of D’Hanis in Medina County, Texas. Photograph taken April 13, 2012, by Robert R. Morris.

SIR 2013–5149

Image: Drill Rig in Karnes County
January 25, 2012

Drill Rig in Karnes County

A drill rig on a drill pad in Karnes County, Texas.

 

Outcrop of eroded and dissected extinct volcano located adjacent to the Frio River, east of Uvalde, Uvalde County, Texas.
January 12, 2012

outcrop of eroded, dissected extinct volcano, Frio River

Photograph showing outcrop of eroded and dissected extinct volcano located adjacent to the Frio River and east of the city of Uvalde in Uvalde County, Texas. Basalt is remnant of volcanic neck, and adjacent to the basalt is pyroclastic material ranging from fine-grained material to volcanic bombs, which formed the slope of the volcano. Photograph taken January 12, 2012, by

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Benbrook Lake, December 2011
December 21, 2011

Benbrook Lake

Benbrook Lake, December 2011. Photograph by Glenn Harwell, U.S. Geological Survey.

SIR 2012–5202