Unified Interior Regions

Region 6: Arkansas-Rio Grande-Texas-Gulf

Regions L2 Landing Page Tabs

Filter Total Items: 140
Date published: May 29, 2018
Status: Active

Edwards Aquifer Groundwater Model Uncertainty Analysis

USGS Texas Water Science Center (TXWSC) is undertaking a 1.5-year study to assess parameter and predictive uncertainty in the Edwards Aquifer Authority MODFLOW Model using both linear and non-linear techniques. The Edwards Aquifer Authority (EAA) uses two models simulating the periods from 2001 to 2015 (verification model) and the drought of record of 1947-1958 (drought of record model).

Date published: May 29, 2018
Status: Active

Nutrient and Sediment Monitoring in Inflows to Texas Bays and Estuaries

The USGS Texas Water Science Center is evaluating the variability of nutrient and sediment concentrations and loads entering Texas bays and estuaries across a range of hydrologic conditions in Galveston Bay (inflow from the Trinity and San Jacinto Rivers), Matagordo Bay (inflow from the Colorado River), San Antonio Bay (inflow from the Guadalupe River), and Nueces Bay (inflow from Nueces River...

Date published: May 29, 2018
Status: Active

Cyanobacteria Methods

Texas Water Science Center (TXWSC) scientists are testing different methods of detecting and quantifying cyanobacteria and cyanotoxins in Texas reservoirs. The results of these tests could be used to develop a cost-effective monitoring plan to evaluate the presence and concentration of cyanobacteria and cyanotoxins in Texas reservoirs.

Date published: May 29, 2018
Status: Active

City of Austin Water Quality Data Review and Analysis

The USGS and City of Austin have been working together on water-quality sampling and studies of surface-water and groundwater sites in the Austin area for many years.  A large variety of water-quality samples have been collected over a range of hydrologic conditions and submitted for numerous laboratory analyses.  Both agencies are interested in exploring existing data for potential insight on...

Date published: May 29, 2018
Status: Active

Coastal Lowlands Regional Groundwater Availability Study

USGS is undertaking a 5-year study to assess groundwater availability for the aquifers proximal to the Gulf of Mexico from the Texas-Mexico border through the panhandle of Florida, known as the Coastal Lowlands Aquifer System (CLAS). This study is one of several within the Regional Groundwater Availability Studies of the ...

Date published: May 29, 2018
Status: Active

Catahoula Water Chemistry Network

In 2009, large volume groundwater users began the exploration of the Catahoula Sandstone as an alternate water source in Montgomery County. Little to no information exists on the water quality of the Catahoula Sandstone in Montgomery County. To assess the viability of the Catahoula Sandstone as a potential source of groundwater, the USGS Texas Water Science Center is collecting water-quality...

Contacts: Jason Ramage
Date published: May 25, 2018
Status: Active

Carrizo Aquifer Water Quality

The USGS Texas Water Science Center, in cooperation with the San Antonio Water System, has been collecting data since 2004 to characterize the quality of and ascertain changes in groundwater at and near the water system’s Twin Oaks Aquifer Storage and Recovery (ASR) site, where the water system has been injecting water from the Edwards aquifer into the Carrizo aquifer for storage. Findings are...

Contacts: Cassi L Crow
Date published: May 25, 2018
Status: Active

Assimilative Capacity of Lake Livingston

The nutrient and sediment data collected by this study provides insight into assimilative capacity of reservoirs and impacts to inflows for coastal Texas.

Contacts: Michael Lee
Date published: May 25, 2018
Status: Active

Bandera Flood Early Warning Tool

Risk of future flooding events in the Bandera County area highlights a critical need for a flood warning system.  As part of the flood warning system, a tool set is needed to enhance the communication of flood risk and provide emergency managers additional information necessary to better mitigate the impacts of flooding. The USGS Texas Water Science Center is helping build this tool set...

Contacts: Cassi L Crow
Date published: May 25, 2018
Status: Active

Arroyo Colorado Water Quality Monitoring

As a result of being able to continuously monitor the water column in multiple depths, dynamic changes in water chemistry (such as those that result from barge traffic and large storms) now can be identified, thereby helping water resource managers better understand changes in water quality in the Arroyo Colorado.

Contacts: Cassi L Crow
Date published: February 1, 2018
Status: Completed

Hurricane Harvey - Forecast and Documentation of Coastal Change

Hurricane Harvey coastal change forecast and pre- and post-storm photos documenting coastal change.

Date published: January 18, 2018
Status: Active

Forecasting Coastal Change

This project focuses on understanding the magnitude and variability of extreme storm impacts on sandy beaches. The overall objective is to improve real-time and scenario-based predictions of coastal change to support management of coastal infrastructure, resources, and safety. 

Contacts: Kara Doran
Filter Total Items: 1,624
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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

Effects of salinity and light on growth and interspecific interactions between Myriophyllum spicatum L. and Ruppia maritima L.

Submerged macrophyte habitats provide significant benefits to estuarine systems. In southeast Louisiana, Myriophyllum spicatum L. (milfoil) and Ruppia maritima L. (widgeongrass) are dominant species existing across fresh to brackish areas. Though frequently co-occurring across the range of salinity and light conditions, their...

Hillman, E.R.; La Peyre, Megan

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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.

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Year Published: 2018

New insights on scale-dependent surface-groundwater exchange from a floating self-potential Dipole

In south-central Texas the lower Guadalupe River has incised into the outcrop of the Carrizo-Wilcox aquifer. The river and the aquifer are hydraulically connected across the outcrop, although the connectivity is obscured at the surface by alluvium and surface-water and groundwater exchange dynamics are currently poorly understood. To investigate...

Ikard, Scott; Teeple, Andrew P.; Payne, Jason ; Stanton, Gregory P.; Banta, J. Ryan

Filter Total Items: 266
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.

Image shows a police car in a flooded roadway in Texas
August 27, 2017

Hurricane Harvey Flooding on Buffalo Bayou at Piney Point

USGS field crews made multiple record high flood measurements on Aug. 27, including downstream of Addicks and Barker dam. Flood measurements near Addicks and Barker dam are critical for making public safety decisions, as 1.2 million people live downstream.

USGS hydrologic technicians Eric Boeding and Robert Ellis measured the height and speed of

...
USGS scientist Jeff East is monitoring streamflow and flooding from Hurricane Harvey.
August 26, 2017

USGS Scientist Monitoring Streamflow & Flooding from Hurricane Harvey

In addition to staff that conduct field measurements of flooding conditions, others monitor information indoors. Here, USGS scientist Jeff East is monitoring streamflow and flooding from Hurricane Harvey.

 

USGS scientist Matthew Barnes makes the highest streamflow measurement ever recorded at Eagle Ferry Rd near Anahuac, Texas.
August 26, 2017

Highest streamflow recorded near Anahuac, Texas.

USGS scientist Matthew Barnes makes the highest streamflow measurement ever recorded at Eagle Ferry Rd near Anahuac, Texas. Find more
information from this site information here: https://waterdata.usgs.gov/nwis/uv?site_no=08042558

A streamgage near a bridge cross over a river.
August 26, 2017

USGS Streamgage on West Side of Houston During Hurricane Harvey

Photo of a USGS streamgage on the west side of Houston during Hurricane Harvey. Find more information from this site information here:
https://waterdata.usgs.gov/nwis/uv?site_no=08072680

 

Scientist taking a photo.
August 26, 2017

Flood measurements in Houston during Hurricane Harvey

USGS scientist Mackenzie Mullins takes flood measurements at Berry Bayou in Houston, Texas.

 

USGS storm-tide sensor installed in preparation for Hurricane Harvey
August 25, 2017

USGS storm-tide sensor installed in preparation for Hurricane Harvey

USGS storm-tide sensor installed in preparation for Hurricane Harvey on St. Charles Bay near Interstate 35.  

USGS scientist Charles Hartmann installs a storm-tide sensor in preparation for Hurricane Harvey in Carancahua Bay, Texas. 
August 24, 2017

USGS scientist installs a storm-tide sensor

USGS scientist Charles Hartmann installs a storm-tide sensor in preparation for Hurricane Harvey in Carancahua Bay, Texas. 

USGS scientists installs storm-tide sensor in preparation for Hurricane Harvey
August 24, 2017

USGS scientists installs storm-tide sensor

USGS scientist Darwin Ockerman installs a storm-tide sensor at Packery Channel near Corpus Christi, Texas. 

USGS storm-tide sensor installed in preparation for Hurricane Harvey near Matagorda, Texas.
August 24, 2017

USGS storm-tide sensor installed in preparation for Hurricane Harvey

USGS storm-tide sensor installed in preparation for Hurricane Harvey near Matagorda, Texas.

USGS scientists flags a debris line on a telephone pole
August 15, 2017

USGS scientist flags a debris line on a telephone pole

USGS hydrologic technician Brandon Cooper flags a debris line on a telephone pole approximately 14.3 feet above the ground and located about 245 feet east of the bridge on Keith Road over Boggy Creek, September 15, 2017. 

Filter Total Items: 176
Catawba rhododendron blooming at Round Bald, NC
August 11, 2016

“From the mountains to the coast, the southeastern U.S. contains ecosystems that harbor incredible biodiversity. Many of those ecosystems are already highly at risk from urbanization and other human land-use change. Identifying the ecosystems at risk from climate change will help inform conservation and management to ensure we don’t lose that biodiversity.” (Jennifer Constanza, report author)

USGS
June 21, 2016

A new report about how groundwater quality and quantity has changed in and around Gaines, Terry and Yoakum counties, Texas is now available from the U.S. Geological Survey.

Updated 2016 version of the East Austin US Topo quadrangle with orthoimage turned off to better see the improved road network.
May 4, 2016

The East Austin, Texas quadrangle is the updated "feature map" on the US Topo and Historical Topographic Map Collection websites.

Scan of the1886 legacy topographic map quadrangle of the greater Austin, Texas area from the USGS Historic Topographic Map Colle
April 5, 2016

Updated US Topo maps for Texas and Oklahoma available for download; add Census Bureau road data, wetlands layer and select trails

Filter Total Items: 102