Unified Interior Regions

Region 6: Arkansas-Rio Grande-Texas-Gulf

Regions L2 Landing Page Tabs

Filter Total Items: 1,619
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Year Published: 2014

Effects of land use, stream habitat, and water quality on biological communities of wadeable streams in the Illinois River Basin of Arkansas, 2011 and 2012

The Illinois River Basin includes an area of diverse land use in northwestern Arkansas. Land-use data collected in 2006 indicate that most of the land in the basin is agricultural. The agricultural land is used primarily for production of poultry and cattle. Eighteen sites were selected from the list of candidate sites based on drainage area,...

Petersen, James C.; Justus, B.G.; Meredith, Bradley J.
Effects of land use, stream habitat, and water quality on biological communities of wadeable streams in the Illinois River Basin of Arkansas, 2011 and 2012; 2014; SIR; 2014-5009; Petersen, James C.; Justus, Billy G.; Meredith, Bradley J.

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Year Published: 2014

Simulation of groundwater flow in the Edwards-Trinity and related aquifers in the Pecos County region, Texas

The Edwards-Trinity aquifer is a vital groundwater resource for agricultural, industrial, and public supply uses in the Pecos County region of western Texas. The U.S. Geological Survey completed a comprehensive, integrated analysis of available hydrogeologic data to develop a numerical groundwater-flow model of the Edwards-Trinity and related...

Clark, Brian R.; Bumgarner, Johnathan R.; Houston, Natalie A.; Foster, Adam L.
Simulation of groundwater flow in the Edwards-Trinity and related aquifers in the Pecos County region, Texas; 2014; SIR; 2013-5228; Clark, Brian R.; Bumgarner, Johnathan R.; Houston, Natalie A.; Foster, Adam L.

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Year Published: 2014

Quantifying the predictive consequences of model error with linear subspace analysis

All computer models are simplified and imperfect simulators of complex natural systems. The discrepancy arising from simplification induces bias in model predictions, which may be amplified by the process of model calibration. This paper presents a new method to identify and quantify the predictive consequences of calibrating a simplified computer...

White, Jeremy T.; Doherty, John E.; Hughes, Joseph D.
White, J. T., J. E. Doherty, and J. D. Hughes (2014), Quantifying the predictive consequences of model error with linear subspace analysis, Water Resour. Res., 50, 1152–1173, doi:10.1002/2013WR014767.

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Year Published: 2014

Trends in precipitation, streamflow, reservoir pool elevations, and reservoir releases in Arkansas and selected sites in Louisiana, Missouri, and Oklahoma, 1951–2011

The U.S. Geological Survey (USGS) and the U.S. Army Corps of Engineers (USACE) conducted a statistical analysis of trends in precipitation, streamflow, reservoir pool elevations, and reservoir releases in Arkansas and selected sites in Louisiana, Missouri, and Oklahoma for the period 1951–2011. The Mann-Kendall test was used to test for trends in...

Wagner, Daniel M.; Krieger, Joshua D.; Merriman, Katherine R.
Trends in precipitation, streamflow, reservoir pool elevations, and reservoir releases in Arkansas and selected sites in Louisiana, Missouri, and Oklahoma, 1951–2011; 2014; SIR; 2013-5240; Wagner, Daniel M.; Krieger, Joshua D.; Merriman, Katherine R.

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Year Published: 2014

Linkage of the Soil and Water Assessment Tool and the Texas Water Availability Model to simulate the effects of brush management on monthly storage of Canyon Lake, south-central Texas, 1995-2010

The U.S. Geological Survey (USGS), in cooperation with the Texas State Soil and Water Conservation Board, developed and applied an approach to create a linkage between the published upper Guadalupe River Soil Water Assessment Tool (SWAT) brush-management (ashe juniper [Juniperus ashei]) model and the full authorization version Guadalupe River...

Asquith, William H.; Bumgarner, Johnathan R.
Linkage of the Soil and Water Assessment Tool and the Texas Water Availability Model to simulate the effects of brush management on monthly storage of Canyon Lake, south-central Texas, 1995-2010; 2014; SIR; 2013-5239; Asquith, William H.; Bumgarner, Johnathan R.

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Year Published: 2014

Parameter estimation for the 4-parameter Asymmetric Exponential Power distribution by the method of L-moments using R

The implementation characteristics of two method of L-moments (MLM) algorithms for parameter estimation of the 4-parameter Asymmetric Exponential Power (AEP4) distribution are studied using the R environment for statistical computing. The objective is to validate the algorithms for general application of the AEP4 using R. An algorithm was...

Asquith, William H.
Parameter estimation for the 4-parameter Asymmetric Exponential Power distribution by the method of L-moments using R; 2014; Article; Journal; Computational Statistics and Data Analysis; Asquith, William H.

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Year Published: 2014

Response to comment on "Cancer risk from incidental ingestion exposures to PAHs associated with coal-tar-sealed pavement"

No abstract available.

William, E. Spencer; Mahler, Barbara; Van Metre, Peter C.
Response to comment on "Cancer risk from incidental ingestion exposures to PAHs associated with coal-tar-sealed pavement"; 2014; Article; Journal; Environmental Science & Technology; William, E. Spencer; Mahler, Barbara J.; Van Metre, Peter C.

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Year Published: 2014

Ecological limit functions relating fish community response to hydrologic departures of the ecological flow regime in the Tennessee River basin, United States

Ecological limit functions relating streamflow and aquatic ecosystems remain elusive despite decades of research. We investigated functional relationships between species richness and changes in streamflow characteristics at 662 fish sampling sites in the Tennessee River basin. Our approach included the following: (1) a brief summary of relevant...

Knight, Rodney R.; Murphy, Jennifer C.; Wolfe, William J.; Saylor, Charles F.; Wales, Amy K.
Ecological limit functions relating fish community response to hydrologic departures of the ecological flow regime in the Tennessee River basin, USA; 2013; Article; Journal; Ecohydrology; Knight, Rodney R.; Murphy, Jennifer C.; Wolfe, William J.; Saylor, Charles F.; Wales, Amy K.

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Year Published: 2014

Historical records, sources, and spatial trends of PCBs along the Rhône River (France).

Despite bans on PCB use since 1975 (open systems) and 1987 (closed systems), concentrations of PCBs in riverine fish in France continue to exceed regulatory levels. We present historical records of PCB concentrations in sediment cores from eight sites on the Rhône River, from Lake Geneva to the Mediterranean Sea. Maximum PCB concentrations (sum of...

Mourier, Brice; Desmet, Marc; Van Metre, Peter C.; Mahler, Barbara; Perrodin, Yves; Roux, Gwenaelle; Bedell, Jean-Phillippe; Lefebvre, Lynn W.; Babut, Marc

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Year Published: 2013

PAH concentrations in lake sediment decline following ban on coal-tar-based pavement sealants in Austin, Texas

Recent studies have concluded that coal-tar-based pavement sealants are a major source of polycyclic aromatic hydrocarbons (PAHs) in urban settings in large parts of the United States. In 2006, Austin, TX, became the first jurisdiction in the U.S. to ban the use of coal-tar sealants. We evaluated the effect of Austin’s ban by analyzing PAHs in...

Van Metre, Peter C.; Mahler, Barbara
PAH concentrations in lake sediment decline following ban on coal-tar-based pavement sealants in Austin, Texas; 2013; Article; Journal; Environmental science and technology; Van Metre, Peter C.; Mahler, Barbara J.

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Year Published: 2013

Spatio-temporal spawning and larval dynamics of a zebra mussel (Dreissena polymorpha) population in a North Texas Reservoir: implications for invasions in the southern United States

Zebra mussels were first observed in Texas in 2009 in a reservoir (Lake Texoma) on the Texas-Oklahoma border. In 2012, an established population was found in a near-by reservoir, Ray Roberts Lake, and in June 2013, settled mussels were detected in a third north Texas reservoir, Lake Lewisville. An established population was detected in Belton Lake...

Churchill, Christopher John
Spatio-temporal spawning and larval dynamics of a zebra mussel (Dreissena polymorpha) population in a North Texas Reservoir: implications for invasions in the southern United States; 2013; Article; Journal; Aquatic Invasions; Churchill, Christopher John

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Year Published: 2013

A preliminary assessment of streamflow gains and losses for selected stream reaches in the lower Guadalupe River Basin, Texas, 2010-12

The U.S. Geological Survey, in cooperation with the U.S. Army Corps of Engineers–Fort Worth District, the Texas Water Development Board, the Guadalupe-Blanco River Authority, and the Edwards Aquifer Authority, investigated streamflow gains and losses in the lower Guadalupe River Basin during four selected base-flow periods in March 2010,...

Wehmeyer, Loren L.; Winters, Karl E.; Ockerman, Darwin J.
A preliminary assessment of streamflow gains and losses for selected stream reaches in the lower Guadalupe River Basin, Texas, 2010-12; 2013; SIR; 2013-5209; Wehmeyer, Loren L.; Winters, Karl E.; Ockerman, Darwin J.

Filter Total Items: 266
Photo of Spring Lake in San Marcos, Texas
October 28, 2008

Photo of Spring Lake in San Marcos, Texas

Spring Lake in San Marcos, Texas, has hundreds of small springs underneath it.

A new website now provides important information about streamflow in the Comal and San Marcos Rivers and springflow at Comal and San Marcos Springs.

USGS station 08114000 Brazos River at Richmond, Texas, looking upstream from eastbound U.S. Highway 90-A bridge.
August 7, 2008

USGS station 08114000 Brazos River at Richmond, Texas

U.S. Geological Survey streamflow-gaging station 08114000 Brazos River at Richmond, Texas, looking upstream from eastbound U.S. Highway 90-A bridge, August 7, 2008.
USGS SIR 2009–5174
http://pubs.usgs.gov/sir/2009/5174/

USGS station 08114000 Brazos River at Richmond, Texas, downstream from eastbound U.S. Highway 90-A bridge.
August 7, 2008

USGS station 08114000 Brazos River at Richmond, Texas

U.S. Geological Survey streamflow-gaging station 08114000 Brazos River at Richmond, Texas, looking downstream from eastbound U.S. Highway 90-A bridge, August 7, 2008.
USGS SIR 2009–5174
http://pubs.usgs.gov/sir/2009/5174/

USGS station 08114000 Brazos River at Richmond, Texas, looking downstream from eastbound U.S. Highway 90-A bridge.
August 7, 2008

USGS station 08114000 Brazos River at Richmond, Texas

U.S. Geological Survey streamflow-gaging station 08114000 Brazos River at Richmond, Texas, looking downstream from eastbound U.S. Highway 90-A bridge, August 7, 2008.
USGS SIR 2009–5174

U.S. Geological Survey streamflow-gaging station 08116650 Brazos River near Rosharon, Texas, looking upstream from right bank.
August 7, 2008

USGS station 08116650 Brazos River near Rosharon, Texas

U.S. Geological Survey streamflow-gaging station 08116650 Brazos River near Rosharon, Texas, looking upstream from right bank, August 7, 2008.
USGS SIR 2009–5174

U.S. Geological Survey streamflow-gaging station 08116650 Brazos River near Rosharon, Texas, upstream from FM 1462 bridge.
August 7, 2008

USGS station 08116650 Brazos River near Rosharon, Texas

U.S. Geological Survey streamflow-gaging station 08116650 Brazos River near Rosharon, Texas, looking upstream from FM 1462 bridge, August 7, 2008.
USGS SIR 2009–5174

U.S. Geological Survey streamflow-gaging station 08116650 Brazos River near Rosharon, Texas, looking downstream from FM 1462.
August 7, 2008

USGS station 08116650 Brazos River near Rosharon, Texas

U.S. Geological Survey streamflow-gaging station 08116650 Brazos River near Rosharon, Texas, looking downstream from FM 1462 bridge, August 7, 2008.
USGS SIR 2009–5174

USGS station 08111500 Brazos River near Hempstead, Texas.
April 2, 2008

USGS station 08111500 Brazos River near Hempstead, Texas

U.S. Geological Survey streamflow-gaging station 08111500 Brazos River near Hempstead, Texas, looking downstream from U.S. Highway 290 bridge, April 2, 2008.
USGS SIR 2009–5174
http://pubs.usgs.gov/sir/2009/5174/

Station 08108700 Brazos River at State Highway 21 near Bryan, Texas.
April 2, 2008

Station 08108700 Brazos Riv. at SH 21 near Bryan, Texas

U.S. Geological Survey streamflow-gaging station 08108700 Brazos River at State Highway 21 near Bryan, Texas, looking downstream from right bank just downstream from Texas State Highway 21 bridge, April 2, 2008.

U.S. Geological Survey streamflow-gaging station 08109000 Brazos River near Bryan, Texas.
April 2, 2008

USGS station 08109000 Brazos River near Bryan, Texas

U.S. Geological Survey streamflow-gaging station 08109000 Brazos River near Bryan, Texas, looking upstream from left bank, April 2, 2008.

SIR 2009–5174

Streamflow-gaging station 08098290 Brazos River near Highbank, Texas
April 1, 2008

Station 08098290 Brazos River near Highbank, Texas

U.S. Geological Survey streamflow-gaging station 08098290 Brazos River near Highbank, Texas, viewed from right bank downstream from FM 413 bridge, April 1, 2008.

SIR 2009–5174

U.S. Geological Survey station 08110800 Navasota River at Old Spanish Road near Bryan, Texas
April 1, 2008

Station 08110800 Navasota Riv. at Old Spanish Rd., Tex., SIR 2009–5174

U.S. Geological Survey streamflow-gaging station 08110800 Navasota River at Old Spanish Road near Bryan, Texas, photograph looking upstream from bridge, April 1, 2008.