Unified Interior Regions

Region 6: Arkansas-Rio Grande-Texas-Gulf

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Filter Total Items: 1,614
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Year Published: 2014

Digital surfaces and thicknesses of selected hydrogeologic units within the Ozark Plateaus aquifer system, northwestern Arkansas

Digital surfaces and thicknesses of nine hydrogeologic units of the Ozark Plateaus aquifer system from land surface to the top of the Gunter Sandstone in northwestern Arkansas were created using geophysical logs, drillers’ logs, geologist-interpreted formation tops, and previously published maps. The 6,040 square mile study area in the Ozark...

Czarnecki, John B.; Bolyard, Susan E.; Hart, Rheannon M.; Clark, Jimmy M.
Digital surfaces and thicknesses of selected hydrogeologic units within the Ozark Plateaus aquifer system, northwestern Arkansas; 2014; SIR; 2013-5208; Czarnecki, John B.; Bolyard, Susan E.; Hart, Rheannon M.; Clark, Jimmy M.

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Year Published: 2014

Mean annual, seasonal, and monthly precipitation and runoff in Arkansas, 1951-2011

This report describes long-term annual, seasonal, and monthly means for precipitation and runoff in Arkansas for the period from 1951 through 2011. Precipitation means were estimated using data from the Parameter-elevation Regressions on Independent Slopes Model database; while total runoff, groundwater runoff, and surface runoff means were...

Pugh, Aaron L.; Westerman, Drew A.
Mean annual, seasonal, and monthly precipitation and runoff in Arkansas, 1951-2011; 2014; SIR; 2014-5006; Pugh, Aaron L.; Westerman, Drew A.

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Year Published: 2014

Groundwater quality at Alabama Plating and Vincent Spring, Vincent, Alabama, 2007–2008

The former Alabama Plating site in Vincent, Alabama, includes the location where the Alabama Plating Company operated an electroplating facility from 1956 until 1986. The operation of the facility generated waste containing cyanide, arsenic, cadmium, chromium, copper, lead, zinc, and other heavy metals. Contamination resulting from the site...

Bradley, Michael W.; Gill, Amy C.
Groundwater quality at Alabama Plating and Vincent Spring, Vincent, Alabama, 2007–2008; 2014; OFR; 2013-1298; Bradley, Michael W.; Gill, Amy C.

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Year Published: 2014

Potentiometric surface of the Ozark aquifer in northern Arkansas, 2010

The Ozark aquifer in northern Arkansas is composed of dolomite, limestone, sandstone, and shale of Late Cambrian to Middle Devonian age and ranges in thickness from approximately 1,100 feet to more than 4,000 feet. Hydrologically, the aquifer is complex, characterized by discrete and discontinuous flow components with large variations in...

Czarnecki, John B.; Pugh, Aaron L.; Blackstock, Joshua M.
Potentiometric surface of the Ozark aquifer in northern Arkansas, 2010; 2014; SIR; 2014-5013; Czarnecki, John B.; Pugh, Aaron L.; Blackstock, Joshua M.

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Year Published: 2014

Trend analysis and selected summary statistics of annual mean streamflow for 38 selected long-term U.S. Geological Survey streamgages in Texas, water years 1916-2012

In 2013, the U.S. Geological Survey (USGS) operated more than 500 continuous streamgages (streamflow-gaging stations) in Texas. In cooperation with the Texas Water Development Board, the USGS evaluated mean annual streamflow data for 38 selected streamgages that were active as of water year 2012. The 38 streamgages have annual mean streamflow data...

Asquith, William H.; Barbie, Dana L.
Trend analysis and selected summary statistics of annual mean streamflow for 38 selected long-term U.S. Geological Survey streamgages in Texas, water years 1916-2012; 2014; SIR; 2013-5230; Asquith, William H.; Barbie, Dana L.

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Year Published: 2014

Arkansas StreamStats: a U.S. Geological Survey web map application for basin characteristics and streamflow statistics

The U.S. Geological Survey (USGS) provides streamflow and other related information needed by water-resource managers responsible for protecting people and property from floods, planning and managing water-resource activities, and protecting water quality. Streamflow statistics provided by the USGS, such as the 1-percent annual exceedance...

Pugh, Aaron L.
Arkansas StreamStats: a U.S. Geological Survey web map application for basin characteristics and streamflow statistics; 2014; FS; 2013-3041; Pugh, Aaron L.

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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.

Filter Total Items: 265
Spring (104) near the headwaters of Leon Creek in the Trinity aquifer outcrop.
October 5, 2010

Spring near headwaters of Leon Creek, Trinity aquifer, Data Series 750

Spring (104) near the headwaters of Leon Creek in the Trinity aquifer outcrop, northern Bexar County, Texas. Photograph taken on Tuesday, October 5, 2010.

Spring (113) near Leon Creek in the Trinity aquifer outcrop
October 5, 2010

Spring near Leon Creek in the Trinity aquifer outcrop

Spring (113) near Leon Creek in the Trinity aquifer outcrop, northern Bexar County, Texas. Photograph taken on Tuesday, October 5, 2010.

Data Series 750

Rafting along the Rio Grande in Big Bend National Park, Texas
September 30, 2010

Rafting along the Rio Grande in Big Bend National Park

Big Bend National Park field trip with Anne Castle, Assisstant Secretary for Water and Science, DOI, September 2010.     USGS Staff explaining USGS Science and water monitoring in the region.

video thumbnail: New Administration Building and Visitor's Center at Texas Chenier Plain Refuge Complex
July 7, 2010

New Administration Building and Visitor's Center at Texas Chenier Plain Refuge Complex

On July 8, 2010, the U.S. Fish and Wildlife Service broke ground on a $6.2 million Recovery Act project to build a Visitor's Center and Administration Building in Anahuac, Texas. The building is intended to serve up to 5.7 million people in the Houston-Sugarland-Baytown metropolitan area and the Texas Gulf Coast. Service and local government officials addressed the Anahuac

video thumbnail: Texas Chenier Plains Refuge Complex Visitor Center Project
February 17, 2010

Texas Chenier Plains Refuge Complex Visitor Center Project

The U.S. Fish and Wildlife Service will use Recovery Act funds to build a new administrative building and visitor center at Texas Chenier Plains Refuge Complex. The new building will be LEED-Silver certified and will benefit from its location approximately 35 miles outside of Houston, which has the fifth largest population in America. In this video, project manager Tim

Worker inspects a tank of coal-tar-based sealcoat
September 16, 2009

Inspecting tank of coal-tar-based sealcoat prior to application

In 2009, USGS had a test plot professionally sealed with coal-tar-based sealcoat in preparation for measurements of volatilization from the pavement after application. Here, the applicator checks the tank. Read about the results here and

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Applicator sprays coal-tar-based sealcoat on parking lot
September 16, 2009

Applicator sprays coal-tar-based sealcoat on parking lot

In 2009, USGS had a test plot professionally sealed with coal-tar-based sealcoat in preparation for measurements of volatilization from the pavement after application. Here, the applicator applies the sealcoat to the parking lot. Read about the results here and

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Black shiny newly sealcoated pavement
September 16, 2009

Pavement newly treated with coal-tar-based sealcoat

In 2009, USGS had a test plot professionally sealed with coal-tar-based sealcoat in preparation for measurements of volatilization from the pavement after application. Here, the newly applied sealcoat is black and shiny. Read about the results here and

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Equipment for measuring volatilization from sealcoated pavement
September 16, 2009

Equipment for measuring volatilization from sealcoated pavement

In 2009, USGS had a test plot professionally sealed with coal-tar-based sealcoat in preparation for measurements of volatilization from the pavement after application. This photo shows the "hat" sampler, which measures PAH concentrations in air just above the pavement surface, and the accompanying piece of equipment that measures PAH concentrations in air about 4 feet from

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Image: Bats in a Texas Evening Sky
May 1, 2009

Bats in a Texas Evening Sky

Insect-eating Brazilian Free-Tailed bats (Tadarida brasiliensis) provide a great pest-control service to agriculture and natural ecosystems.

Canyon Lake, November 2008
November 21, 2008

Canyon Lake

Canyon Lake, November 2008. Photograph by Sam Price, U.S. Army Corps of Engineers.

SIR 2012–5202

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.