Unified Interior Regions

Region 6: Arkansas-Rio Grande-Texas-Gulf

Regions L2 Landing Page Tabs

Filter Total Items: 141
Date published: May 29, 2018
Status: Active

InFRM Flood Inundation Mapping

The purpose of this flood inundation mapping effort will be to meet the needs of real-time emergency managers by bridging the gap between the NWS's river forecasts and FEMA's available hydraulic modeling and mapping. 

Date published: May 29, 2018
Status: Active

Hydrologic Trends Analysis on selected Texas streams

The USGS provides technical advice or assistance to the U.S. Army Corps of Engineers.

Date published: May 29, 2018
Status: Active

Hydrogeology of the Edwards and Trinity Aquifers within Hays County

The Texas Water Development Board classifies the karstic Edwards and Trinity aquifers as major sources of water in south-central Texas. To effectively manage the water resources in the area, detailed maps and descriptions of the geologic framework and hydrostratigraphic units of the aquifers in Hays County, Texas are needed. In 2016 and 2018, the Texas Water Science Center (TXWSC), in...

Contacts: Allan K Clark
Date published: May 29, 2018
Status: Active

Hydrogeologic and Geochemical Investigation of the Trinity and Northern Segment Edwards Aquifers

The USGS Texas Water Science Center, in cooperation with the Clearwater Underground Water Conservation District and Bell County Adaptive Management Coalition, is evaluating the hydrogeology and water quality of the Northern segment of the Edwards and Trinity aquifers in Bell County to provide regional resource managers responsible for regulation of water use and drought management strategies...

Date published: May 29, 2018
Status: Active

Geophysical Logging of Dockum Aquifer

To aid in the understanding of the Dockum aquifer, USGS will collect borehole geophysical logs at multiple Dockum wells. All geophysical logs will be reviewed to assess lithology and groundwater quality changes.

Date published: May 29, 2018
Status: Active

Geoelectric and Seismic Characterization of the Precambrian Granite Gravel Aquifer, Llano Uplift, Central Texas

The USGS Texas Water Science Center (TXWSC) is testing the suitability of seismic refraction tomography (SRT) and time-domain electromagnetic sounding (TDEM) geophysical methods for mapping the contact boundary between the Granite Gravel aquifer and the underlying crystalline Town Mountain Granite bedrock in southwestern Burnet County. The Granite Gravel aquifer is anticipated to show a...

Contacts: Scott Ikard
Date published: May 29, 2018
Status: Active

Hydrogeologic Atlas for Fort Bliss

Successful long term stewardship of Fort Bliss lands includes managing traditional hydrologic resources such as surface water and groundwater resources and increasingly, geologic resources such as geothermal reservoirs and deep well injection locations. The USGS Texas Water Science Center is developing a garrison-wide hydrogeologic atlas that describes the hydrology and hydrogeology of Fort...

Date published: May 29, 2018
Status: Active

Post Hurricane Harvey Assessment

In the immediate aftermath of Hurricane Harvey related flooding, the USGS Texas Water Science Center and the Federal Emergency Management Agency (FEMA) initiated a cooperative study to evaluate the magnitude of the flood, determine the probability of occurrence, and map the extent of the flood in Texas.

Date published: May 29, 2018
Status: Active

Urban Waters Federal Partnership - Edwards Aquifer Recharge Zone Monitoring Network

The USGS Texas Water Science Center is implementing a more complete and integrated monitoring network for the Edwards aquifer to improve the understanding of aquifer water quality and establish a baseline for measuring future water-quality changes.

    Date published: May 29, 2018
    Status: Active

    Dallas Lake Nutrients Study

    The USGS Texas Water Science Center Nutrients Study for Dallas Water Utilities (DWU) provides discrete-depth data for nutrients, major ions, and other water-quality parameters in multiple source-water reservoirs used by DWU. The program is designed to assess nutrient and major ion occurrence, distribution, and concentration in waters by using established field and laboratory methods.

    Filter Total Items: 1,611
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    Year Published: 2019

    Water resources of Tensas Parish, Louisiana

    Information concerning the availability, use, and quality of water in Tensas 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. In 2014, 38.01 million gallons...

    White, Vincent E.
    White, V.E., 2019, Water resources of Tensas Parish, Louisiana: U.S. Geological Survey Fact Sheet 2019–3004, 6 p., https://doi.org/10.3133/fs20193004.

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    Year Published: 2019

    Characterizing groundwater/surface-water interaction using hydrograph-separation techniques and groundwater-level data throughout the Mississippi Delta, USA

    The Mississippi Delta, located in northwest Mississippi, is an area dense with industrial-level agriculture sustained by groundwater-dependent irrigation supplied by the Mississippi River Valley Alluvial aquifer (alluvial aquifer). The Delta provides agricultural commodities across the United States and around the world. Observed declines in...

    Killian, Courtney D.; Asquith, William H.; Barlow, Jeannie R. B.; Bent, Gardner C.; Kress, Wade; Barlow, Paul M.; Schmitz, Darrel W.

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    Year Published: 2019

    Adjudicating groundwater: A judge’s guide to understanding groundwater and modeling

    Dividing the Waters offers this groundwater science bench book that cannot be matched by any other scientific or judicial publication.  Adjudicating Groundwater combines the expertise and experience of academic scientists (UC Davis/Stanford), federal scientists (U.S. Geological Survey), and judicial officers to create a...

    Brandt, Alf; Fienen, Michael N.; White, Jeremy T.; Harter, Thomas; Moran, Tara; Wildman, Eric

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    Year Published: 2019

    Preferential groundwater seepage in karst terrane inferred from geoelectric measurements

    The Ellenburger–San Saba aquifer discharges spring flows into the overlying Hamilton Creek bed in Burnet County, central Texas. The aquifer is susceptible to contamination from surface‐water reservoirs because of the presence of dissolution cavities that are hydraulically connected to the reservoirs in some locations. There is concern that...

    Ikard, Scott; Pease, Emily

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    Year Published: 2018

    Simulation of groundwater flow and analysis of projected water use for the Rush Springs aquifer, western Oklahoma

    The U.S. Geological Survey, in cooperation with the Bureau of Reclamation and the Oklahoma Water Resources Board, (1) quantified the groundwater resources of the Rush Springs aquifer in western Oklahoma by developing a numerical groundwater-flow model, (2) evaluated the effects of estimated equal-proportionate-share (EPS) pumping rates on aquifer...

    Ellis, John
    Ellis, J.H., 2018, Simulation of groundwater flow and analysis of projected water use for the Rush Springs aquifer, western Oklahoma: U.S. Geological Survey Scientific Investigations Report 2018–5136, 156 p., https://doi.org/10.3133/sir20185136.

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    Year Published: 2018

    Land-cover changes associated with oil and natural-gas production and concentrations of selected constituents in surface-water and streambed-sediment samples collected upstream from and within an area of oil and natural-gas production, south Texas, 2008–17

    The extensive development of oil and natural-gas resources in south Texas during the past 10 years has led to questions regarding possible environmental effects of processes associated with oil and natural-gas production, in particular the process of hydraulic fracturing, on water and other natural resources. Part of the lower San Antonio River...

    Crow, Cassi L.; Opsahl, Stephen P.; Pedraza, Diana E.; Pease, Emily C.; Kushnereit, Ross K.
    Crow, C.L., Opsahl, S.P., Pedraza, D.E., Pease, E.C., and Kushnereit, R.K., 2018, Land-cover changes associated with oil and natural-gas production and concentrations of selected constituents in surface-water and streambed-sediment samples collected upstream from and within an area of oil and natural-gas production, south Texas, 2008–17: U.S. Geological Survey Scientific Investigations Report 2018–5119, 52 p., https://doi.org/10.3133/sir20185119.

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    Year Published: 2018

    Geologic framework and hydrostratigraphy of the Edwards and Trinity aquifers within Hays County, Texas

    The Edwards and Trinity aquifers are classified as major aquifers by the Texas Water Development Board and are major sources of water in south-central Texas, where Hays County is located. Detailed maps and descriptions of the geologic framework and hydrostratigraphic units (HSUs) of these karstic aquifers in Hays County are needed for water...

    Clark, Allan K.; Pedraza, Diana E.; Morris, Robert R.
    Clark, A.K., Pedraza, D.E., and Morris, R.R., 2018, Geologic framework and hydrostratigraphy of the Edwards and Trinity aquifers within Hays County, Texas: U.S. Geological Survey Scientific Investigations Map 3418, 1 sheet, scale 1:24,000, pamphlet, https://doi.org/10.3133/sim3418.

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    Year Published: 2018

    Annual and approximately quarterly series peak streamflow derived from interpretations of indirect measurements for a crest-stage gage network in Texas through water year 2015

    In 2006, the U.S. Geological Survey (USGS), incooperation with the Texas Department of Transportation,began collecting annual and approximately quarterly seriespeak-streamflow data at streamflow-gaging stations in smalltomedium-sized watersheds in central and western Texasas part of a crest-stage gage (CSG) network, along withselected flood-...

    Asquith, William H.; Harwell, Glenn R.; Winters, Karl E.
    Asquith, W.H., Harwell, G.R., and Winters, K.E., 2018, Annual and approximately quarterly series peak streamflow derived from interpretations of indirect measurements for a crest-stage gage network in Texas through water year 2015: U.S. Geological Survey Scientific Investigations Report 2018–5107, 24 p., https://doi.org/10.3133/sir20185107.

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    Year Published: 2018

    New insights into surface-water/groundwater exchanges in the Guadalupe River, Texas, from floating geophysical methods

    In south-central Texas, the amount of streamflow in the Guadalupe River is a primary concern for local and downstream communities because of municipal, agricultural, wildlife, and recreational uses. Understanding the flow paths and rates of exchange between the surface water in the river and the groundwater in the underlying Carrizo-Wilcox aquifer...

    Ikard, Scott J.; Banta, J. Ryan; Stanton, Gregory P.
    Ikard, S.J., Banta, J.R., and Stanton, G.P., 2018, New insights into surface-water/groundwater exchanges in the Guadalupe River, Texas, from floating geophysical methods: U.S. Geological Survey Fact Sheet 2018–3057, 4 p., https://doi.org/10.3133/fs20183057.

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    Year Published: 2018

    Status of groundwater-level altitudes and long-term groundwater-level changes in the Chicot, Evangeline, and Jasper aquifers, Houston-Galveston region, Texas, 2018

    Since the early 1900s, most of the groundwater withdrawals in the Houston-Galveston region, Texas, have been from the three primary aquifers that compose the Gulf Coast aquifer system—the Chicot, Evangeline, and Jasper aquifers. Withdrawals from these aquifers are used for municipal supply, industrial, and irrigation purposes. This report,...

    Shah, Sachin D.; Ramage, Jason K.; Braun, Christopher L.
    Shah, S.D., Ramage, J.K., and Braun, C.L., 2018, Status of groundwater-level altitudes and long-term groundwater-level changes in the Chicot, Evangeline, and Jasper aquifers, Houston-Galveston region, Texas, 2018: U.S. Geological Survey Scientific Investigations Report 2018–5101, 18 p., https://doi.org/10.3133/sir20185101.

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    Year Published: 2018

    Characterization of peak streamflows and flood inundation of selected areas in southeastern Texas and southwestern Louisiana from the August and September 2017 flood resulting from Hurricane Harvey

    Hurricane Harvey made landfall near Rockport, Texas, on August 25, 2017, as a Category 4 hurricane with wind gusts exceeding 150 miles per hour. As Harvey moved inland, the forward motion of the storm slowed down and produced tremendous rainfall amounts over southeastern Texas, with 8-day rainfall amounts exceeding 60 inches in some locations,...

    Watson, Kara M.; Harwell, Glenn R.; Wallace, David S.; Welborn, Toby L.; Stengel, Victoria G.; McDowell, Jeremy S.
    Watson, K.M., Harwell, G.R., Wallace, D.S., Welborn, T.L., Stengel, V.G., and McDowell, J.S., 2018, Characterization of peak streamflows and flood inundation of selected areas in southeastern Texas and southwestern Louisiana from the August and September 2017 flood resulting from Hurricane Harvey: U.S. Geological Survey Scientific Investigations Report 2018–5070, 44 p., https://doi.org/10.3133/sir20185070.

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    Year Published: 2018

    Water-quality observations of the San Antonio segment of the Edwards aquifer, Texas, with an emphasis on processes influencing nutrient and pesticide geochemistry and factors affecting aquifer vulnerability, 2010–16

    As questions regarding the influence of increasing urbanization on water quality in the Edwards aquifer are raised, a better understanding of the sources, fate, and transport of compounds of concern in the aquifer—in particular, nutrients and pesticides—is needed to improve water management decision-making capabilities. The U.S. Geological Survey...

    Opsahl, Stephen P.; Musgrove, MaryLynn; Mahler, Barbara; Lambert, Rebecca B.
    Opsahl, S.P., Musgrove, M., Mahler, B.J., and Lambert, R.B., 2018, Water-quality observations of the San Antonio segment of the Edwards aquifer, Texas, with an emphasis on processes influencing nutrient and pesticide geochemistry and factors affecting aquifer vulnerability, 2010–16: U.S. Geological Survey Scientific Investigations Report 2018–5060, 67 p., https://doi.org/10.3133/sir20185060.

    Filter Total Items: 265
    Image shows USGS scientists planning their water quality work on a whiteboard
    August 31, 2017

    Water Quality Sampling Planning Following Hurricane Harvey

    A peek into a USGS planning meeting to coordinate water-quality sampling efforts in response to Harvey. This sampling effort is part of the federal government’s broad efforts to ensure public health and to support the state, tribal, and local response to the storm

    Image shows USGS scientists in PFDs taking water quality samples from Lake Houston
    August 31, 2017

    Water Quality Sampling on Lake Houston Following Hurricane Harvey

    A USGS field crew takes water-quality samples on Lake Houston following Harvey.

    Image shows a USGS scientist in a PFD servicing a water quality monitor on a lake
    August 31, 2017

    Water Quality Sampling on Lake Houston Following Hurricane Harvey

    USGS scientist Lisa Ashmore services a water-quality monitor on Lake Houston. These instruments stayed afloat and collected data throughout the storm.

    August 31, 2017

    Image of the Week: Hurricane Harvey Inundates Gulf Coast

    Hurricane Harvey made landfall on August 25th. Over the next few days, record rain totals had devastated the area.

    At the USGS EROS Center, we study land change, operate the Landsat satellites, and maintain the longest, continuously acquired collection of images of the Earth's land surface.

    USGS EROS Center (

    Image shows a USGS scientist in a PFD servicing a streamgage
    August 31, 2017

    Servicing a Streamgage at Addicks Reservoir following Hurricane Harvey

    USGS scientist Jimmy Hopkins repairs a streamgage downstream of Addicks reservoir at Buffalo Bayou after flooding from Hurricane Harvey. This gauge is normally accessed on land from a platform on the side of a bridge.

    USGS scientists Lisa Ashmore and Lee Bodkin collect water-quality samples on Lake Houston in response to Harvey.
    August 31, 2017

    Collecting Water Quality Samples following Harvey

    USGS scientists Lisa Ashmore and Lee Bodkin collect water-quality samples on Lake Houston in response to the high flow conditions that resulted from Harvey. 

    USGS scientist Lisa Ashmore services a water-quality monitor on Lake Houston. These instruments stayed afloat throughout Harvey.
    August 31, 2017

    Servicing a water-quality monitor following Harvey

    USGS scientist Lisa Ashmore services a water-quality monitor on Lake Houston. These instruments stayed afloat and collected data throughout Harvey. 

    A USGS scientist wearing a PFD measures flooding on the Guadalupe River
    August 30, 2017

    Measuring Hurricane Harvey Flooding on the Guadalupe River

    USGS scientist Alec MacDonald takes flood measurements on the Guadalupe River in Victoria, Texas.

    Image shows a USGS scientist in a PFD servicing a streamgage
    August 29, 2017

    Servicing the Streamgage at Addicks Reservoir

    USGS scientist Tom Pistillo services the streamgage at Addicks Reservoir to ensure that accurate reservoir water-level data are being measured, which are critical for helping the U.S. Army Corps of Engineers and Harris County Flood Control District make informed reservoir operation decisions.

    Image shows flooding around a streamgage at Addicks Reservoir
    August 29, 2017

    Hurricane Harvey Flooding at Addicks Reservoir

    USGS field crew measure reservoir water-level data at Addicks Reservoir, which are critical for helping the U.S. Army Corps of Engineers make informed reservoir operation decisions.

    Image shows flooding at a streamgage site on Addicks Reservoir
    August 29, 2017

    Hurricane Harvey Flooding at Addicks Reservoir

    USGS field crew measure reservoir water-level data at Addicks Reservoir, which are critical for helping the U.S. Army Corps of Engineers make informed reservoir operation decisions.

    Image shows a USGS scientist in a PFD servicing a streamgage
    August 29, 2017

    Servicing a Streamgage at Barker Reservoir Following Hurricane Harvey

    USGS scientist Tom Pistillo wades through the waters of Barker Reservoir to ensure accurate reservoir water-level data are being measured, which are critical for helping the U.S. Army Corps of Engineers and Harris County Flood Control District make informed reservoir operation decisions.

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    USGS
    February 8, 2017

    A new JavaScript library, called GWIS (Graphing Water Information System), can create time-series plots of information measured at U.S. Geological Survey hydrologic data collection sites across the United States.

    Photo of a young girl drinking water, which likely originated from groundwater sources. 
    January 19, 2017

    A regional assessment of untreated groundwater in the Coastal Lowlands aquifer system in the southeastern United States is now available from the U.S. Geological Survey.

    Photo of two of the main spring discharge points of Comal springs.
    December 7, 2016

    A new U.S. Geological Survey website provides important information about streamflow in the Comal and San Marcos Rivers and springflow at Comal and San Marcos Springs. This website was developed in collaboration with the Edwards Aquifer Authority.

    Oklahoma
    October 24, 2016

    Distant wastewater disposal wells likely induced the third largest earthquake in recent Oklahoma record, the Feb. 13, 2016, magnitude 5.1 event roughly 32 kilometers northwest of Fairview, Oklahoma. These findings from the U.S. Geological Survey are available in the online edition of Geophysical Research Letters.

    Southwestern Willow Flycatcher
    September 6, 2016

    A new report by the U.S. Geological Survey shows, for the first time ever, detailed habitat information on the entire range of a federally listed endangered bird allowing officials to take a scientific approach to helping protect the species.

    Crop of OK earthquake
    September 3, 2016

    A magnitude 5.8 earthquake struck in Oklahoma on September 3, 2016 at 12:02:44 UTC (7:02 am local time). 

    Photo of the Colorado River near Moab, Utah
    August 15, 2016

    Future groundwater replenishment in the Upper Colorado River Basin may benefit from projected increases in future basin-wide precipitation under current climate projections, according to a recent study by the U.S. Geological Survey and Bureau of Reclamation.

    Filter Total Items: 102