Unified Interior Regions

Region 6: Arkansas-Rio Grande-Texas-Gulf

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We conduct impartial, multi- and interdisciplinary research and monitoring to address a broad range of scienctific issues that affect the Arkansas-Rio Grande-Texas-Gulf Region.

News

Date published: May 12, 2020

USGS Responds to Spring Flooding

U.S. Geological Survey field crews are measuring flooding across the country as spring weather is in full swing. Warming temperatures, increased precipitation and snowmelt have caused moderate to major flooding in the upper Midwest, East Coast, Central Plains and the Southeast portions of the country.

Date published: March 26, 2020

M5.0 Earthquake Hits West Texas, New Mexico Border

On March 26, 2020, a  magnitude 5.0 earthquake struck West Texas near the New Mexico border. Seismic instruments indicate the earthquake originated at a depth of 5.3 miles (8.5 kilometers). 

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Date published: September 23, 2019
Status: Active

Urban Waters Federal Partnership - Edwards Aquifer Recharge in a Developing Landscape

San Antonio Texas consistently ranks as one of the fastest growing large cities in the United States. Urban development can affect groundwater quality as trees and open space are replaced by buildings and roads, increasing the amount of urban runoff draining directly into the Edwards aquifer. A network of sophisticated surface water and groundwater monitoring sites is being used to help...

Date published: September 4, 2019
Status: Active

Real-Time Storm Response

Coastal change forecasts and pre- and post-storm photos documenting coastal change for landfalling storms. Currently responding to Hurricane Dorian.

Contacts: Kara Doran
Date published: July 8, 2019
Status: Active

Concealed Rare Earth Element (REE) Terranes in the Southern Basin and Range Geologic Province

The project is developing an understanding of the types, sizes, and spatial distribution of rare earth element (REE) related deposits in the southern Basin and Range geologic province to help ensure the availability of rare earth elements to the U.S.

Contacts: Mark Bultman
Date published: March 26, 2019
Status: Active

Identification of Hydrologic Controls on Coastal Spartina patens Marshes and Optimal Hydrological Conditions for Sustainable Mottled Duck Habitat

Mottled ducks rely on the coastal marshes of the Texas Chenier Plain, which are considered among the most critically endangered habitats in the United States. USGS scientists are evaluating what might be contributing to the degradation of high-quality mottled duck habitat to better understand the causes of habitat loss and subsequently mitigate those losses.

Date published: March 26, 2019
Status: Active

Defining Native Ranges of U.S. Inland Fishes

Understanding the native versus non-native range of a species can provide useful information about dispersal, population distribution patterns, and human mediated movement across hydrologic barriers. The USGS Nonindigenous Aquatic Species (NAS) Program is working with partners to define native ranges of inland fishes in the United States to help identify which species should be included in the...

Date published: March 5, 2019
Status: Active

The Nonindigenous Aquatic Species Flood and Storm Tracker (FaST)

Storm-related flooding can lead to the potential spread of nonindigenous (or non-native) aquatic species into waterways they have not been seen in before. The USGS Nonindigenous Aquatic Species program has developed an innovative mapping tool to help natural resource managers with post-storm nonindigenous aquatic species detection and assessment efforts. 

Date published: March 4, 2019
Status: Active

Natural Resource Damage and Assessment (NRDA) Program Monitoring and Adaptive Management

State and Federal agencies are working together to assess the damage caused by the Deepwater Horizon oil spill and to determine appropriate restoration actions to restore natural resources, ecological services, and recreational services injured or lost due to the incident. 

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Date published: December 18, 2019

Texas Water Dashboard

The Texas Water Dashboard presents USGS real-time stream, lake and reservoir, precipitation and groundwater data for more than 850 USGS real-time observation stations in Texas.

Date published: September 26, 2019

Data for assessing the susceptibility of groundwater used for drinking water supply from selected principal aquifers of the Western United States, 2004-2018

Groundwater age distribution and susceptibility to natural and anthropogenic contaminants were assessed for selected principal aquifers of the Western United States: the Central Valley aquifer system (CVAL), the Basin and Range basin-fill aquifers (BNRF), the Rio Grande aquifer system (RIOG), the High Plains aquifer (HPAQ), the Columbia Plateau basaltic-rock aquifers (

Date published: March 14, 2019

USGS National and Global Oil and Gas Assessment Project - Permian Basin Province, Midland Basin, Wolfcamp Shale Assessment Unit Boundaries and Assessment Input Data Forms, Version 2.0

The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of the higher-level Total Petroleum System. The Assessment Unit is shown herein as a geographic boundary interpreted, defined, and mapped by the geologist responsible for the province and incorporates...

Date published: January 1, 2019

Crustal Architecture Beneath the Southern Midcontinent (USA) -- Data Grids and 3D Geophysical Models

Regional grid files and 3D voxel models were used to study crustal architecture beneath the Southern Midcontinent (USA) by McCafferty and others (2019). The study covered a rectangular, multi-state area of 924 by 924 kilometers centered on Missouri, and a corresponding volume extending from the topographic surface to a depth of 50 kilometers below sea level. The grid files consist of

Date published: December 6, 2018

Downloadable Data for Southern Oklahoma Oil and Gas Assessments

GIS Data for Southern Oklahoma Oil and Gas Assessments

Date published: December 6, 2018

Downloadable Data for Marathon Thrust Belt Oil and Gas Assessments

GIS Data for Marathon Thrust Belt Oil and Gas Assessments 

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GRDA bathymetry
September 22, 2017

View topographic and bathymetric contour data and query water depths for the Neosho River, Spring River and Elk River, in northeastern Oklahoma.

Funding partners: Grand River Dam Authority

OK earthquake map
August 2, 2017

Information on the latest earthquakes in Oklahoma.

Miami Inundation Pilot Viewer
January 1, 2017

View topographic and bathymetric contour data and simulate Neosho River inundation areas for selected (and real-time) water-surface elevations at Grand Lake and the Neosho River streamgage near Commerce

Funding partners: U.S. Army Corps of Engineers, Grand River Dam Authority, and Oklahoma Department of Wildlife 

Shawnee Reservoir Data Viewer
January 1, 2017

View topographic and bathymetric contour data and simulate Shawnee (Twin Lakes) Reservoir inundation areas for selected (and real-time) water-surface elevations.

Funding partners: City of Shawnee

Hurricane Louisiana Coast
September 14, 2016

June 1 marks the beginning of hurricane season. Should storms arrive on the Louisiana coast, the people in coastal communities across the State, along with many Federal, State, and local agencies will need to know how the storms are affecting the coastal and low-lying areas.The USGS maintains an extensive network of coastal gages that provides critical time-sensitive water level.

Digital Elevation Model in the Atchafalaya Basin, LA
April 19, 2016

The 3DEP products and services available through The National Map consist of standard digital elevation models (DEMs) at various horizontal resolutions, elevation source and associated datasets, an elevation point query service and bulk point query service. All 3DEP products are available, free of charge and without use restrictions.

Grand Lake Image
March 3, 2016

Grand Lake Data Viewer - View topographic and bathymetric contour data and simulate Grand Lake inundation areas for selected water-surface elevations.

Funding partners: U.S. Army Corps of Engineers, Grand River Dam Authority, and Oklahoma Department of Wildlife Conservation

 

dbflood-image
September 1, 2015

Flood Database for Oklahoma - Obtain records of historical flood depth and discharge measurements as well as flood-related news clippings.

Funding partners: Oklahoma Department of Transportation

StreamStats in Oklahoma
January 1, 2015

Delineate custom drainage basins, compute basin characteristics, and estimate streamflow statistics.

Funding partners: Oklahoma Department of Transportation and Oklahoma Water Resources Board

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Year Published: 2020

Geochemical assessment of the Hueco Bolson, New Mexico and Texas, 2016–17

Understanding groundwater quality in transboundary aquifers like the Hueco Bolson is important for the 2.7 million people along the United States and Mexico border living in and near the combined metropolitan areas of Ciudad Juárez, Mexico, and El Paso, Texas, who rely on groundwater for water supply. To better understand water-quality conditions...

Ging, Patricia B.; Humberson, Delbert G.; Ikard, Scott J.
Ging, P.B., Humberson, D.G., and Ikard, S.J., 2020, Geochemical assessment of the Hueco Bolson, New Mexico and Texas, 2016–17: U.S. Geological Survey Scientific Investigations Report 2020–5056, 30 p., https://doi.org/10.3133/sir20205056.

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Year Published: 2020

InFRM Flood Decision Support Toolbox user guide

Digital geospatial flood inundation mapping can be a powerful tool for flood risk management. Flood preparedness, communication, warning, response and mitigation can be enhanced by flood inundation mapping that shows floodwater extent and depth over the land surface. Flood inundation maps that accurately reflect observed and forecasted...

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Year Published: 2020

Effects of huisache removal on rangeland evapotranspiration in Victoria County, south-central Texas, 2015–18

The U.S. Geological Survey and Desert Research Institute, in cooperation with the Natural Resources Conservation Service, Texas State Soil and Water Conservation Board, Victoria County Groundwater Conservation District, Victoria Soil and Water Conservation District, and the San Antonio River Authority, evaluated the hydrologic effects of Vachellia...

Slattery, Richard N.; Ockerman, Darwin J.; Bromley, Matthew; Huntington, Justin; Banta, John R.
Slattery, R.N., Ockerman, D.J., Bromley, M., Huntington, J., and Banta, J.R., 2020, Effects of huisache removal on rangeland evapotranspiration in Victoria County, south-central Texas, 2015–18: U.S. Geological Survey Scientific Investigations Report 2020–5008, 27 p., https://doi.org/10.3133/sir20205008.

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Year Published: 2020

Hydrogeologic units, contour maps, and cross sections of the Boone and Roubidoux aquifers, northeastern Oklahoma, 2020

The Boone and Roubidoux aquifers (or their equivalents) are the main sources of fresh groundwater in northeastern Oklahoma. Projected total water demand of both surface water and groundwater in northeastern Oklahoma is expected to increase approximately 56 percent from 2010 to 2060. This report provides an overview of the hydrogeology of...

Russell, Cory A.; Stivers, Jacob W.
Russell, C.A., and Stivers, J.W., 2020, Hydrogeologic units, contour maps, and cross sections of the Boone and Roubidoux aquifers, northeastern Oklahoma, 2020: U.S. Geological Survey Scientific Investigations Map 3452, 2 sheets, http://dx.doi.org/10.3133/sim3452.

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Year Published: 2020

Landfill leachate contributes per-/poly-fluoroalkyl substances (PFAS) and pharmaceuticals to municipal wastewater

Widespread disposal of landfill leachate to municipal sewer infrastructure in the United States calls for an improved understanding of the relative organic-chemical contributions to the wastewater treatment plant (WWTP) waste stream and associated surface-water discharge to receptors in the environment. Landfill leachate, WWTP influent, and WWTP...

Masoner, Jason R.; Kolpin, Dana W.; Cozzarelli, Isabelle M.; Smalling, Kelly L.; Bolyard, Stephanie; Field, Jennifer; Furlong, Edward T.; Gray, James L.; Lozinski, Duncan; Reinhart, Debra; Rodowa, Alix; Bradley, Paul M.

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Year Published: 2020

Legacy and current‐use contaminants in sediments alter macroinvertebrate communities in southeastern US Streams

Sediment contamination of freshwater streams in urban areas is a recognized and growing concern. As a part of a comprehensive regional stream‐quality assessment, stream‐bed sediment was sampled from streams spanning a gradient of urban intensity in the Piedmont ecoregion of the southeastern United States. We evaluated relations between a broad...

Moran, Patrick W.; Kemble, Nile E.; Waite, Ian R.; Mahler, Barbara; Nowell, Lisa H.; Van Metre, Peter C.

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Year Published: 2020

Water-quality comparison of the Gulf Coast aquifer system at various scales in Texas from National Water-Quality Assessment groundwater studies, 2013–15

One of the objectives of the U.S. Geological Survey National Water-Quality Assessment (NAWQA) Project is to assess groundwater quality in aquifers that are important sources of drinking water such as the coastal lowlands aquifer system, which is often referred to in Texas as the “Gulf Coast aquifer system.” The Gulf Coast aquifer system extends...

Ging, Patricia B.
Ging, P.B., 2020, Water-quality comparison of the Gulf Coast aquifer system at various scales in Texas from National Water-Quality Assessment groundwater studies, 2013–15: U.S. Geological Survey Fact Sheet 2020–3010, 4 p., https://doi.org/10.3133/fs20203010.

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Year Published: 2020

Water-quality comparison of the Gulf Coast aquifer system and Carrizo-Wilcox aquifer in Texas from National Water-Quality Assessment Project Principal Aquifer Surveys, 2013 and 2015

The U.S. Geological Survey’s National Water-Quality Assessment (NAWQA) Project assessed the quality of groundwater in aquifers that are important sources of drinking water in the United States. One major aquifer in Texas that was assessed by NAWQA in 2013 is the coastal lowlands aquifer system, which is often referred to in Texas as the “Gulf...

Ging, Patricia B.
Ging, P.B., 2020, Water-quality comparison of the Gulf Coast aquifer system and Carrizo-Wilcox aquifer in Texas from National Water-Quality Assessment Project Principal Aquifer Surveys, 2013 and 2015: U.S. Geological Survey Fact Sheet 2020–3009, 4 p., https://doi.org/10.3133/fs20203009.

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Year Published: 2020

Multi-region assessment of pharmaceutical exposures and predicted effects in USA wadeable urban-gradient streams

Human-use pharmaceuticals in urban streams link aquatic-ecosystem health to human health. Pharmaceutical mixtures have been widely reported in larger streams due to historical emphasis on wastewater-treatment plant (WWTP) sources, with limited investigation of pharmaceutical exposures and potential effects in smaller headwater streams. In 2014–...

Bradley, Paul; Journey, Celeste A.; Button, Daniel T.; Carlisle, Daren; Huffman, B.J.; Qi, Sharon L.; Romanok, Kristin; Van Metre, Peter C.

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Year Published: 2020

Precipitation, temperature, groundwater-level elevation, streamflow, and potential flood storage trends within the Brazos, Colorado, Big Cypress, Guadalupe, Neches, Sulphur, and Trinity River Basins in Texas Through 2017

The U.S. Geological Survey (USGS), in cooperation with the U.S. Army Corps of Engineers (USACE), analyzed streamflow trends and streamflow-related variables through 2017 in seven important water-supply basins to provide information that can help water managers with the USACE and river authorities make future water management decisions. The primary...

Harwell, Glenn R.; McDowell, Jeremy; Gunn-Rosas, Cathina; Garrett, Brett
Harwell, G.R., McDowell, J.S., Gunn, C.L., and Garrett, B.S., 2020, Precipitation, temperature, groundwater-level elevation, streamflow, and potential flood storage trends within the Brazos, Colorado, Big Cypress, Guadalupe, Neches, Sulphur, and Trinity River Basins in Texas through 2017 (ver. 1.1, April 2020): U.S. Geological Survey Scientific Investigations Report 2019–5137, 94 p., https://doi.org/10.3133/sir20195137.

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Year Published: 2019

Methods for estimating the magnitude and frequency of peak streamflows for unregulated streams in Oklahoma developed by using streamflow data through 2017

The U.S. Geological Survey (USGS), in cooperation with the Oklahoma Department of Transportation, updated peak-streamflow regression equations for estimating flows with annual exceedance probabilities from 50 to 0.2 percent for the State of Oklahoma. These regression equations incorporate basin characteristics to estimate peak-streamflow magnitude...

Lewis, Jason M.; Hunter, Shelby L.; Labriola, Laura G.
Lewis, J.M., Hunter, S.L., and Labriola, L.G., 2019, Methods for estimating the magnitude and frequency of peak streamflows for unregulated streams in Oklahoma developed by using streamflow data through 2017 (ver. 1.1, March 2020): U.S. Geological Survey Scientific Investigations Report 2019–5143, 39 p., https://doi.org/10.3133/sir20195143.

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Year Published: 2019

Report of the River Master of the Delaware River for the period December 1, 2009–November 30, 2010

A Decree of the Supreme Court of the United States, entered June 7, 1954, established the position of Delaware River Master within the U.S. Geological Survey. In addition, the Decree authorizes diversion of water from the Delaware River Basin and requires compensating releases from certain reservoirs, owned by New York City, to be made under the...

Russell, Kendra L.; Ockerman, Darwin; Krejmas, Bruce E.; Paulachok, Gary N.; Mason,, Robert R.
Russell, K.L., Ockerman, D., Krejmas, B.E., Paulachok, G.N., and Mason, R.R., Jr., 2019, Report of the River Master of the Delaware River for the period December 1, 2009–November 30, 2010: U.S. Geological Survey Open-File Report 2019–1093, 128 p., https://doi.org/10.3133/ofr20191093.

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Oil, gas, and water separation vessels at a carbon dioxide enhanced oil recovery operation
December 10, 2019

Oil, gas, and water separation vessels

Oil, gas, and water separation vessels at a carbon dioxide enhanced oil recovery operation, Horseshoe Atoll, Upper Pennsylvanian Wolfcampian play in the Permian Basin Province in Texas.

August 12, 2019

Surveying Contracted-Opening Indirect Measurements

This video goes into detail about surveying high-water marks, various aspects of bridges, and cross sections for the contracted-opening method. 
 

August 2, 2019

Requirements for the Contracted-Opening Method

This video discusses the general requirements that will be needed to accomplish a contracted-opening indirect discharge measurement. Approach section, contracted section, and necessary high-water mark locations are described along with scenarios where the method will not be successful. 
 

July 25, 2019

Climate Projections as a Way to Illustrate Future Possibilities

This video is a recording of the webinar “Climate Projections as a Way to Illustrate Future Possibilities" that is part of the USGS National Climate Adaptation Science Center (NCASC), in partnership with the National Conservation Training Center (NCTC), 2019 webinar series. Previous recordings can be found at https

December 12, 2018

Image of the Week - Lake Meredith’s Return

Lake Meredith National Recreation Area takes its name from the water body it surrounds in the Texas Panhandle. The Amarillo-area lake sees more than a million visitors a year.

Visitor numbers were much smaller just a few years ago. More than a decade of drought shrank water levels at Lake Meredith until a rush of rain in 2017 brought a turnaround.

Each week,

USGS scientist Scott Grzyb reviews high-water data on the Llano River in response a flash flood on October 8.
October 8, 2018

Collecting flood data on the Llano River in response to a flash flood

USGS scientist Scott Grzyb reviews high-water data collected by boat on the Llano River in Llano, Texas in response to a flash flood on October 8, 2018.

USGS scientists pause at sunset at the end of a long day collecting high-water measurements on the Llano River.
October 8, 2018

End of a long day collecting flood data on the Llano River

USGS scientists Scrott Grzyb and Michael Scheider pause at sunset at the end of a long day collecting high-water measurements along the Llano River on October 8, 2018.

September 20, 2018

Habitat Connectivity: Assessing Threats and IDing Conservation Actions

An important conservation strategy for climate change is to enhance and maintain regional habitat connectivity for the long-term viability of wildlife populations. Modeling habitat connectivity for wildlife species often results in a mapped network of linkages between habitat patches. A critical next step is to determine which of those linkages are priorities for

June 26, 2018

Waterfowl Seeking Submerged Aquatic Vegetation

Waterfowl populations in the northern Gulf of Mexico (NGOM) rely extensively on plants that grow under the surface in shallow waters, know as submerged aquatic vegetation (SAV), as a critical food resource in the winter season. SAV roots, shoots, and seeds provide high carbohydrate wildlife food that sustains valuable waterfowl species, including the American Wigeon,

An image of USGS research drilling rig on side of U.S. Route 90 in Kinney County, Texas.  The sky is streaked with clouds.
May 8, 2018

Going for the Eagle Ford Shale Formation, Kinney County, Texas

One charge of the U.S. Geological Survey’s Energy Resources Science Center is performing description
and analysis of hydrocarbon source rocks as input to USGS oil and gas assessments. This 2018 image
shows a coring and geophysical well-logging operation adjacent to U.S. Route 90, Kinney County, Texas.
The borehole yielded a 500’ rock core containing Austin

...
Vista of Buda, Eagle Ford, and Austin Formations, Terrell County, Texas (March 10, 2015)
May 8, 2018

Vista of Buda, Eagle Ford, and Austin Formations, Terrell County

One charge of the U.S. Geological Survey’s Energy Resources Science Center is conducting field work to
better understand the distribution of hydrocarbon source rocks as input to USGS oil and gas
assessments. This 2015 image is a view to the south-southeast of rocks exposed along an unnamed
draw near Antonio Creek, Terrell County, Texas. The Buda Limestone is

...
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A USGS field team measures spring floodwaters at Chesapeake bay's largest tributary.
May 12, 2020

U.S. Geological Survey field crews are measuring flooding across the country as spring weather is in full swing. Warming temperatures, increased precipitation and snowmelt have caused moderate to major flooding in the upper Midwest, East Coast, Central Plains and the Southeast portions of the country.

March 26 West Texas Earthquake Map
March 26, 2020

On March 26, 2020, a  magnitude 5.0 earthquake struck West Texas near the New Mexico border. Seismic instruments indicate the earthquake originated at a depth of 5.3 miles (8.5 kilometers). 

USGS Flood Inundation Mapper with water depth of 38 feet
August 26, 2019

New tools for flood preparedness are now available for the Medina River near Bandera, Texas, from the U.S. Geological Survey, the Bandera County River Authority and Groundwater District, and the Texas Water Development Board.

USGS scientist Jon Thomas collecting time-domain electromagnetic sounding in the Texas southern high plains
March 22, 2019

An interactive viewer to visualize groundwater resources in Gaines, Terry and Yoakum Counties, Texas, is now available from the U.S. Geological Survey in cooperation with the Llano Estacado Underground Water Conservation District, Sandy Land Underground Water Conservation District and South Plains Underground Water Conservation District. 

Image shows a map of the assessment units of the 2018 Delaware Basin oil and gas assessment
November 28, 2018

Estimates Include 46.3 Billion Barrels of Oil, 281 Trillion Cubic feet of Natural Gas, and 20 Billion Barrels of Natural Gas Liquids in Texas and New Mexico’s Wolfcamp Shale and Bone Spring Formation.

USGS scientist Scott Grzyb reviews high-water data on the Llano River in response a flash flood on October 8.
October 16, 2018

Reporters: Do you want to accompany a USGS field crew as they measure flooding? Please contact Jennifer LaVista or Lynne Fahlquist.

Hurricane Harvey flood-inundation map of the West Fork San Jacinto River
July 9, 2018

Nineteen inundation maps and detailed flood information from Hurricane Harvey are now available from the U.S. Geological Survey, in cooperation with the Federal Emergency Management Agency. Hurricane Harvey was the most significant rainfall event in U.S. history, both in scope and peak rainfall amounts, since records began in the 1880s.

Map of Oklahoma Low-Level Flight Study Area, Approximate
June 1, 2018

Magnetic measurements made during low-altitude airplane flights conducted for the U.S. Geological Survey and the Oklahoma Geological Survey reveal possible deep faults that may contribute to increased seismic activity in response to wastewater injection in certain portions of Oklahoma.

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