Unified Interior Regions

Region 6: Arkansas-Rio Grande-Texas-Gulf

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Filter Total Items: 88
GIS and Custom Application Support for the Gulf Coast Ecosystem Restoration Council
Date Published: April 16, 2016

GIS and Custom Application Support for the Gulf Coast Ecosystem Restoration Council

 The scientists at the Wetland and Aquatic Science Center (WARC) have provided coastal restoration project managers and decision makers with GIS planning, database and custom application capacity since 1992. The scope and complexity of this support has increased over the years and has resulted in the development of a comprehensive geospatial and advanced application teams that provide decision...

TAAP Map, US Geological Survey
Date Published: June 13, 2015
Status: Active

Transboundary Aquifer Assessment Program (TAAP)

Transboundary aquifers are an essential source of water for United States – Mexico border communities. Declining water levels, deteriorating water quality, and increasing use of groundwater resources on both sides of the border raise concerns about the long-term availability of this supply.

The U.S. – Mexico Transboundary Aquifer Assessment Act (Public Law 109-448) of 2006 was enacted...

Photo of pivot irrigation in progress in the High Plains Aquifer region.
Date Published: June 21, 2009
Status: Completed

NAWQA High Plains Regional Groundwater Study

As part of the National Water Quality Assessment Program (NAWQA), the USGS has evaluated ground-water quality in the High Plains aquifer system. Beginning in 1999 and continuing for a period of 6 years, the High Plains Regional Groundwater Study intensively investigated the...

Tractor spraying agricultural chemicals
Date Published: August 8, 2003
Status: Completed

Texas Source-Water Susceptibility Assessment

In the State of Texas, both surface water (streams, canals, and reservoirs) and ground water are used as sources of public water supply (PWS). 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 help develop protective yet cost-effective and risk-mitigated monitoring strategies, the...

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Year Published: 2015

Landfill leachate as a mirror of today's disposable society: Pharmaceuticals and other contaminants of emerging concern in final leachate from landfills in the conterminous United States

Final leachates (leachate after storage or treatment processes) from 22 landfills in 12 states were analyzed for 190 pharmaceuticals and other contaminants of emerging concern (CECs), which were detected in every sample, with the number of CECs ranging from 1 to 58 (median = 22). In total, 101 different CECs were detected in leachate...

Masoner, Jason R.; Kolpin, Dana W.; Furlong, Edward T.; Cozzarelli, Isabelle M.; Gray, James L.

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Year Published: 2015

Methods for estimating the magnitude and frequency of peak streamflows at ungaged sites in and near the Oklahoma Panhandle

This report presents the results of a cooperative study by the U.S. Geological Survey and the Oklahoma Department of Transportation to estimate the magnitude and frequency of peak streamflows from regional regression equations for ungaged stream sites in and near the Oklahoma Panhandle. These methods relate basin characteristics (physiographic and...

Smith, S. Jerrod; Lewis, Jason M.; Graves, Grant M.
Smith, S.J., Lewis, J.M., and Graves, G.M., 2015, Methods for estimating the magnitude and frequency of peak streamflows at ungaged sites in and near the Oklahoma Panhandle: U.S. Geological Survey Scientific Investigations Report 2015–5134, 35 p., http://dx.doi.org/10.3133/sir20155134.

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Year Published: 2015

Trace-metal and organic constituent concentrations in bed sediment at Big Base and Little Base Lakes, Little Rock Air Force Base, Arkansas—Comparisons to sediment-quality guidelines and indications for timing of exposure

This report compares concentrations for a wide range of inorganic and organic constituents in bed sediment from Big Base Lake and Little Base Lake, which are located on Little Rock Air Force Base, Arkansas, to sediment-quality guidelines. This report also compares trace-metal concentrations in a bed-sediment core sample to sediment age to...

Justus, B.G.; Hays, Phillip D.; Hart, Rheannon M.
Justus, B.G., Hays, P.D., and Hart, R.M., 2015, Trace-metal and organic constituent concentrations in bed sediment at Big Base and Little Base Lakes, Little Rock Air Force Base, Arkansas—Comparisons to sediment-quality guidelines and indications for timing of exposure: U.S. Geological Survey Scientific Investigations Report 2015–5112, 17 p., http://dx.doi.org/10.3133/sir20155112.

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Year Published: 2015

Numerical simulation of groundwater flow, resource optimization, and potential effects of prolonged drought for the Citizen Potawatomi Nation Tribal Jurisdictional Area, central Oklahoma

A hydrogeological study including two numerical groundwater-flow models was completed for the Citizen Potawatomi Nation Tribal Jurisdictional Area of central Oklahoma. One numerical groundwater-flow model, the Citizen Potawatomi Nation model, encompassed the jurisdictional area and was based on the results of a regional-scale hydrogeological study...

Ryter, Derek W.; Kunkel, Christopher D.; Peterson, Steven M.; Traylor, Jonathan P.
Ryter, D.R., Kunkel, C.D., Peterson, S.M., and Traylor, J.P., 2018, Numerical simulation of groundwater flow, resource optimization, and potential effects of prolonged drought for the Citizen Potawatomi Nation Tribal Jurisdictional Area, central Oklahoma (ver. 1.2, February 2018), U.S. Geological Survey Scientific Investigations Report 2014–5167, 27 p., https://doi.org/10.3133/sir20145167.

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Year Published: 2015

Streamflow gains and losses in the Colorado River in northwestern Burnet and southeastern San Saba Counties, Texas

In October 2012, the U.S. Geological Survey (USGS), in cooperation with the Central Texas Groundwater Conservation District, began an assessment to better understand if and where groundwater from the Ellenburger-San Saba aquifer is discharging to the Colorado River, and if and where Colorado River streamflow is recharging the Ellenburger-San Saba...

Braun, Christopher L.; Grzyb, Scott D.
Braun, C.L., and Grzyb, S.D., 2015, Streamflow gains and losses in the Colorado River in northwestern Burnet and southeastern San Saba Counties, Texas, 2012–14: U.S. Geological Survey Scientific Investigations Report 2015–5098, 32 p., http://dx.doi.org/10.3133/sir20155098.

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Year Published: 2015

Sediment and nutrient trapping as a result of a temporary Mississippi River floodplain restoration: The Morganza Spillway during the 2011 Mississippi River Flood

The 2011 Mississippi River Flood resulted in the opening of the Morganza Spillway for the second time since its construction in 1954 releasing 7.6 km3 of water through agricultural and forested lands in the Morganza Floodway and into the Atchafalaya River Basin. This volume, released over 54 days, represented 5.5% of the Mississippi...

Kroes, Daniel; Schenk, Edward R.; Noe, Gregory B.; Benthem, Adam J.

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Year Published: 2015

Updated numerical model with uncertainty assessment of 1950-56 drought conditions on brackish-water movement within the Edwards aquifer, San Antonio, Texas

In 2010, the U.S. Geological Survey, in cooperation with the San Antonio Water System, began a study to assess the brackish-water movement within the Edwards aquifer (more specifically the potential for brackish-water encroachment into wells near the interface between the freshwater and brackish-water transition zones, referred to in this report...

Brakefield, Linzy K.; White, Jeremy T.; Houston, Natalie A.; Thomas, Jonathan V.
Brakefield, L.K., White, J.T., Houston, N.A., and Thomas, J.V., 2015, Updated numerical model with uncertainty assessment of 1950–56 drought conditions on brackish-water movement within the Edwards aquifer, San Antonio, Texas: U.S. Geological Survey Scientific Investigations Report 2015–5081, 54 p., http://dx.doi.gov/10.3133/sir20155081.

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Year Published: 2015

Water-level altitudes 2015 and water-level changes in the Chicot, Evangeline, and Jasper aquifers and compaction 1973-2014 in the Chicot and Evangeline aquifers, Houston-Galveston region, Texas

Most of the land-surface subsidence in the Houston-Galveston region, Texas, has occurred as a direct result of groundwater withdrawals for municipal supply, commercial and industrial use, and irrigation that depressured and dewatered the Chicot and Evangeline aquifers, thereby causing compaction of the aquifer sediments, mostly in the fine-grained...

Kasmarek, Mark C.; Ramage, Jason K.; Houston, Natalie A.; Johnson, Michaela R.; Schmidt, Tiffany S.
Kasmarek, M.C., Ramage, J.K., Houston, N.A., Johnson, M.R., and Schmidt, T.S., 2015, Water-level altitudes 2015 and water-level changes in the Chicot, Evangeline, and Jasper aquifers and compaction 1973–2014 in the Chicot and Evangeline aquifers, Houston-Galveston region, Texas: U.S. Geological Survey Scientific Investigations Map 3337, pamphlet, 16 sheets, scale 1:100,000, http://dx.doi.org/10.3133/sim3337.

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Year Published: 2015

Simulation of groundwater flow and chloride transport in the “1,200-foot” sand with scenarios to mitigate saltwater migration in the “2,000-foot” sand in the Baton Rouge area, Louisiana

Groundwater withdrawals have caused saltwater to encroach into freshwater-bearing aquifers beneath Baton Rouge, Louisiana. The 10 aquifers beneath the Baton Rouge area, which includes East and West Baton Rouge Parishes, Pointe Coupee Parish, and East and West Feliciana Parishes, provided about 184.3 million gallons per day (Mgal/d) for public...

Heywood, Charles E.; Lovelace, John K.; Griffith, Jason M.
Heywood, C.E., Lovelace, J.K., and Griffith, J.M., 2015, Simulation of groundwater flow and chloride transport in the “1,200-foot” sand with scenarios to mitigate saltwater migration in the “2,000-foot” sand in the Baton Rouge area, Louisiana (ver. 1.1, September 2015): U.S. Geological Survey Scientific Investigations Report 2015–5083, 69 p., http://dx.doi.org/10.3133/sir20155083.

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Year Published: 2015

Water levels of the Ozark aquifer in northern Arkansas, 2013

The Ozark aquifer is the largest aquifer, both in area of outcrop and thickness, and the most important source of freshwater in the Ozark Plateaus physiographic province, supplying water to northern Arkansas, southeastern Kansas, southern Missouri, and northeastern Oklahoma. The study area includes 16 Arkansas counties lying completely or...

Schrader, Tony P.
Schrader, T.P., 2015, Water levels of the Ozark aquifer in northern Arkansas, 2013: U.S. Geological Survey Scientific Investigations Report 2015–5088, 17 p., 1 pl., http://dx.doi.org/10.3133/sir20155088.

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Year Published: 2015

Geologic and hydrostratigraphic map of the Anhalt, Fischer, and Spring Branch 7.5-minute quadrangles, Blanco, Comal, and Kendall Counties, Texas

This report describes the geology and hydrostratigraphy of the Edwards and Trinity Groups in the Anhalt, Fischer, and Spring Branch 7.5-minute quadrangles, Blanco, Comal, and Kendall Counties, Texas. The hydrostratigraphy was defined based on variations in the amount and type of porosity of each lithostratigraphic unit, which varies depending on...

Clark, Allan K.; Robert R. Morris
Clark, A.K., and Morris, R.R., 2015, Geologic and hydrostratigraphic map of the Anhalt, Fischer, and Spring Branch 7.5-minute quadrangles, Blanco, Comal, and Kendall Counties, Texas: U.S. Geological Survey Scientific Investigations Map 3333, 13 p., 1 sheet, scale 1:50,000, http://dx.dpi.org/10.3133/sim3333.

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Year Published: 2015

Holocene climate variability in Texas, USA: An integration of existing paleoclimate data and modeling with a new, high-resolution speleothem record

Delineating the climate processes governing precipitation variability in drought-prone Texas is critical for predicting and mitigating climate change effects, and requires the reconstruction of past climate beyond the instrumental record. We synthesize existing paleoclimate proxy data and climate simulations to provide an overview of climate...

Wong, Corinne I.; Banner, Jay L.; Musgrove, MaryLynn
Wong, C.I., Banner, J.L., and Musgrove, M.L., 2015, Holocene climate variability in Texas, USA-An integration of existing paleoclimate data and modeling with a new, high-resolution speleothem record: Quaternary Science Reviews, in press, DOI:10.1016/j.quascirev.2015.06.023

Filter Total Items: 265
August 23, 2016

Golden Eagle Flight

Golden eagles can be killed by colliding with a number of human-made objects, including wind turbines. USGS research wildlife biologist Todd Katzner describes his studies of golden eagle flight. This research is being done to model flight behavior which might help managers understand how placement of wind turbines might pose significant risks to golden eagles.

 

A satellite image of the Guadalupe Mountains showing a scar of a good burn
June 23, 2016

Landsat Reveals Scar of ‘Good Burn’ at Guadalupe Mountains

Pre- and post-fire images acquired with shortwave infrared (SWIR), near infrared (NIR), and red bands on Landsat 8’s Operational Land Imager sensor reveal a significant, 14,442-acre burn scar within the park’s high country. The burn scar appears red in the June 23 image. Lightning started the wildfire, and strong winds drove it to the Texas-New Mexico border.

Photo of USGS scientist installing a temporary streamgage on the Brazos River near West Columbia, Texas.
June 1, 2016

Temporary Streamgage on Brazos River

USGS scientist Jody Avant installs a temporary streamgage on the Brazos River near West Columbia, Texas. Rapidly deployable streamgages can be installed temporarily to provide emergency managers with additional information needed to help protect public safety.

Photo of a temporary streamgage installed by the USGS on the Brazos River near Brazoria, Texas.
June 1, 2016

Temporary Streamgage on Brazos River

Temporary streamgage installed by the USGS on the Brazos River near Brazoria, Texas. Rapidly deployable streamgages can be installed temporarily to provide emergency managers with additional information needed to help protect public safety.

Photo of a temporary streamgage installed by the USGS on the Brazos River near West Columbia, Texas.
June 1, 2016

Temporary Streamgage on Brazos River

Temporary streamgage installed by the USGS on the Brazos River near West Columbia, Texas. Rapidly deployable streamgages can be installed temporarily to provide emergency managers with additional information needed to help protect public safety.

Satellite image showing the flooding in Houston, Texas
May 28, 2016

Rain-Swollen Brazos River Floods Suburban Houston

Heavy rains that began falling during Memorial Day weekend in late May 2016 pushed the Brazos River, 30 miles southwest of Houston, Texas, toward a near-record flooding stage that hasn’t been seen since 1913, according to the National Weather Service (NWS).

Andy Ramey holding two ducks
May 18, 2016

Andy Ramey holding two Blue-winged Teals

Andy Ramey holding two Blue-winged Teals. This photo was part of an Avian Influenza program. 

The USGS Oklahoma Cooperative Fish and Wildlife Research Unit teams are capturing and marking black bears
May 6, 2016

Oklahoma Cooperative Fish and Wildlife Research Unit Student with Black Bear Cub

The USGS Oklahoma Cooperative Fish and Wildlife Research Unit teams are capturing and marking black bears in the Ozark and Ouachita regions of Oklahoma.

Image: USGS Streamgage near Derby, Texas
April 13, 2016

USGS Streamgage near Derby, Texas

Currently, most of the streamflow equipment is located on a streambank or bridge. Large structures are no longer needed at most streamgage locations. Today, streamgage equipment can be contained in small metal shelters that are located on streambanks or bridges.

Image: USGS Streamgage near Carrollton, Texas.
April 13, 2016

USGS Streamgage near Carrollton, Texas.

Modern-day USGS streamgage at Elm Fork Trinity River near Carrollton, Texas.

Image: USGS Streamgage near Junction, Texas
April 13, 2016

USGS Streamgage near Junction, Texas

A modern 21st century version of a streamgage structure.

Filter Total Items: 168
USGS
December 16, 2014

The U.S. Geological Survey has released a new report detailing changes of groundwater levels in the High Plains Aquifer. The report presents water-level change data in the aquifer for two separate periods: from 1950 – the time prior to significant groundwater irrigation development – to 2013, and 2011 to 2013.

Image: Ready for Action
December 15, 2014

Average chloride concentrations often exceed toxic levels in many northern United States streams due to the use of salt to deice winter pavement, and the frequency of these occurrences nearly doubled in two decades.

USGS
November 3, 2014

For the first time ever, scientists have simulated the movement of sediment throughout the San Antonio River Basin with a new U.S. Geological Survey model, created in cooperation with the San Antonio River Authority (SARA).

USGS
November 3, 2014

For the first time ever, scientists have simulated the movement of sediment throughout the San Antonio River Basin with a new U.S. Geological Survey model, created in cooperation with the San Antonio River Authority (SARA).

USGS
October 8, 2014

Historical groundwater withdrawals have caused the loss of land-surface elevation, or subsidence, in the Houston-Galveston region. Loss of surface elevation is a concern as it may increase the potential for more intense flooding in the study area according to the latest annual report conducted by the U.S. Geological Survey. 

USGS
October 2, 2014

The U.S. Geological Survey has installed two streamgages to be used for flood monitoring in the City of Laredo, Texas.

collage of scientists
September 25, 2014

Collaboration between federal Climate Science Centers, partner agencies and tribes is vital for minimizing and adapting to potential harmful effects of climate change on human society and surrounding ecosystems, according to a newly-released U.S. Geological Survey circular.

USGS
September 3, 2014

Beginning this week, the U.S. Geological Survey will be drilling two test boreholes near Del Rio, Texas, to collect core samples and geophysical information important to better understand the physical properties of the subsurface.

USGS
July 30, 2014

Nesting loggerhead sea turtles in the northern Gulf of Mexico feed among areas that were oiled by the 2010 Deepwater Horizon spill and where human activities occur, several of which are known to pose threats to sea turtles, a new U.S Geological study showed.

USGS
June 16, 2014

The 2006 prohibition on the use of coal-tar-based pavement sealants in Austin, Texas, has resulted in a substantial reduction in polycyclic aromatic hydrocarbons (PAHs), according to a new study by the U.S. Geological Survey.

Lidar image showing the upper parts of the landslide that occurred in northwest Washington on March 22, 2014.
May 14, 2014

Want to know how elevation will benefit your state? The USGS National Geospatial Program is advancing the 3D Elevation Program, known as 3DEP, in response to the growing need for high-quality three-dimensional representations of the Nation’s natural and constructed features.

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