Unified Interior Regions

Region 6: Arkansas-Rio Grande-Texas-Gulf

Regions L2 Landing Page Tabs

Filter Total Items: 142
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.

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: May 1, 2018
Status: Active

Bird Banding Laboratory

The Bird Banding Laboratory (BBL) is an integrated scientific program established in 1920 supporting the collection, archiving, management and dissemination of information from banded and marked birds in North America.  This information is used to monitor the status and trends of resident and migratory bird populations. Because birds are good indicators of the health of the environment, the...

Filter Total Items: 1,591
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Year Published: 2017

Bathymetry and capacity of Shawnee Reservoir, Oklahoma, 2016

Shawnee Reservoir (locally known as Shawnee Twin Lakes) is a man-made reservoir on South Deer Creek with a drainage area of 32.7 square miles in Pottawatomie County, Oklahoma. The reservoir consists of two lakes connected by an equilibrium channel. The southern lake (Shawnee City Lake Number 1) was impounded in 1935, and the northern lake (Shawnee...

Ashworth, Chad E.; Smith, S. Jerrod; Smith, Kevin A.
Ashworth, C.E., Smith, S.J., and Smith, K.A., 2017, Bathymetry and capacity of Shawnee Reservoir, Oklahoma, 2016: U.S. Geological Survey Scientific Investigations Map 3374, 1 sheet, https://doi.org/10.3133/sim3374.

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Year Published: 2017

Hydrogeology and simulation of groundwater flow and analysis of projected water use for the Canadian River alluvial aquifer, western and central Oklahoma

This report describes a study of the hydrogeology and simulation of groundwater flow for the Canadian River alluvial aquifer in western and central Oklahoma conducted by the U.S. Geological Survey in cooperation with the Oklahoma Water Resources Board. The report (1) quantifies the groundwater resources of the Canadian River alluvial aquifer by...

Ellis, John H.; Mashburn, Shana L.; Graves, Grant M.; Peterson, Steven M.; Smith, S. Jerrod; Fuhrig, Leland T.; Wagner, Derrick L.; Sanford, Jon E.
Ellis, J.H., Mashburn, S.L., Graves, G.M., Peterson, S.M., Smith, S.J., Fuhrig, L.T., Wagner, D.L., and Sanford, J.E., 2017, Hydrogeology and simulation of groundwater flow and analysis of projected water use for the Canadian River alluvial aquifer, western and central Oklahoma (ver. 1.1, March 2017): U.S. Geological Survey Scientific Investigations Report 2016–5180, 64 p., 7 pls., https://doi.org/10.3133/sir20165180.

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Year Published: 2017

A water-budget analysis of Medina and Diversion Lakes and the Medina/Diversion Lake system, with estimated recharge to Edwards aquifer, San Antonio area, Texas

In January 2001, the U.S. Geological Survey—in cooperation with the Edwards Aquifer Authority—began a study to refine and, if possible, extend previously derived (1995–96) relations between the stage in Medina Lake and recharge to the Edwards aquifer to include the effects of reservoir stages below 1,018 feet and greater than 1,046 feet above...

Slattery, Richard N.; Miller, Lisa D.
Slattery, R.N., and Miller, L.D., 2017, A water-budget analysis of Medina and Diversion Lakes and the Medina/Diversion Lake system, with estimated recharge to Edwards aquifer, San Antonio area, Texas (ver. 1.1, February 2017): U.S. Geological Survey Scientific Investigations Report 2004–5209, 41 p., https://doi.org/10.3133/sir20045209.

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Year Published: 2016

Improving our understanding of hydraulic-electrical relations: A case study of the surficial aquifer in Emirate Abu Dhabi

Transmissivity is a bulk hydraulic property that can be correlated with bulk electrical properties of an aquifer. In aquifers that are electrically-resistive relative to adjacent layers in a horizontally stratified sequence, transmissivity has been shown to correlate with bulk transverse resistance. Conversely, in aquifers that are electrically-...

Ikard, Scott; Kress, Wade H.

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Year Published: 2016

Selected streambed sediment compounds and water toxicity results for Westside Creeks, San Antonio, Texas, 2014

IntroductionThe Alazán, Apache, Martínez, and San Pedro Creeks in San Antonio, Texas, are part of a network of urban tributaries to the San Antonio River, known locally as the Westside Creeks. The Westside Creeks flow through some of the oldest neighborhoods in San Antonio. The disruption of streambed sediment is anticipated during a planned...

Crow, Cassi L.; Wilson, Jennifer T.; Kunz, James L.
Crow, C.L., Wilson, J.T., and Kunz, J.L., 2016, Selected streambed sediment compounds and water toxicity results for Westside Creeks, San Antonio, Texas, 2014: U.S. Geological Survey Fact Sheet 2016–3096, 4 p., https://doi.org/10.3133/fs20163096.

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Year Published: 2016

Occurrence and concentrations of selected trace elements, halogenated organic compounds, and polycyclic aromatic hydrocarbons in streambed sediments and results of water-toxicity testing in Westside Creeks and the San Antonio River, San Antonio, Texas, 2014

Sediment samples and samples for water-toxicity testing were collected during 2014 from several streams in San Antonio, Texas, known locally as the Westside Creeks (Alazán, Apache, Martínez, and San Pedro Creeks) and from the San Antonio River. Samples were collected during base flow and after periods of stormwater runoff (poststorm conditions) to...

Crow, Cassi L.; Wilson, Jennifer T.; Kunz, James L.
Crow, C.L., Wilson, J.T., and Kunz, J.L., 2016, Occurrence and concentrations of selected trace elements, halogenated organic compounds, and polycyclic aromatic hydrocarbons in streambed sediments and results of water-toxicity testing in Westside Creeks and the San Antonio River, San Antonio, Texas, 2014: U.S. Geological Survey Scientific Investigations Report 2016–5136, 56 p., http://dx.doi.org/10.3133/sir20165136.

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Year Published: 2016

Geologic framework and hydrostratigraphy of the Edwards and Trinity aquifers within northern Bexar and Comal Counties, Texas

During 2014–16, the U.S. Geological Survey, in cooperation with the Edwards Aquifer Authority, documented the geologic framework and hydrostratigraphy of the Edwards and Trinity aquifers within northern Bexar and Comal Counties, Texas. The Edwards and Trinity aquifers are major sources of water for agriculture, industry, and urban and rural...

Clark, Allan K.; Golab, James A.; Morris, Robert R.
Clark, A.K., Golab, J.A., and Morris, R.R., 2016, Geologic framework and hydrostratigraphy of the Edwards and Trinity aquifers within northern Bexar and Comal Counties, Texas: U.S. Geological Survey Scientific Investigations Map 3366, 1 sheet, scale 1:24,000, pamphlet, https://doi.org/10.3133/sim3366.

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Year Published: 2016

Compounds of emerging concern in the San Antonio River Basin, Texas, 2011–12

The City of San Antonio and the surrounding municipalities in Bexar County, Texas, are among the fastest growing cities in the Nation. Increases in residential and commercial development are changing runoff patterns and likely will increase chemical loads into streams. The U.S. Geological Survey, in cooperation with the San Antonio River Authority...

Lambert, Rebecca B.; Opsahl, Stephen P.
Lambert, R.B., and Opsahl, S.P., 2016, Compounds of emerging concern in the San Antonio River Basin, Texas, 2011–12: U.S. Geological Survey Fact Sheet 2016–3071, 6 p., https://doi.org/10.3133/fs20163071.

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Year Published: 2016

Water-level altitudes 2016 and water-level changes in the Chicot, Evangeline, and Jasper aquifers and compaction 1973–2015 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.; Johnson, Michaela R.
Kasmarek, M.C., Ramage, J.K., and Johnson, M.R., 2016, Water-level altitudes 2016 and water-level changes in the Chicot, Evangeline, and Jasper aquifers and compaction 1973–2015 in the Chicot and Evangeline aquifers, Houston-Galveston region, Texas: U.S. Geological Survey Scientific Investigations Map 3365, pamphlet, 16 sheets, scale 1:100,000, http://dx.doi.org/10.3133/sim3365.

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Year Published: 2016

Metformin and other pharmaceuticals widespread in wadeable streams of the southeastern United States

Pharmaceutical contaminants are growing aquatic-health concerns and largely attributed to wastewater treatment facility (WWTF) discharges. Five biweekly water samples from 59 small Piedmont (United States) streams were analyzed for 108 pharmaceuticals and degradates using high-performance liquid chromatography and tandem mass spectrometry. The...

Bradley, Paul M.; Journey, Celeste A.; Button, Daniel T.; Carlisle, Daren M.; Clark, Jimmy M.; Mahler, Barbara; Nakagaki, Naomi; Qi, Sharon L.; Waite, Ian R.; Van Metre, Peter C.

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Year Published: 2016

A python framework for environmental model uncertainty analysis

We have developed pyEMU, a python framework for Environmental Modeling Uncertainty analyses, open-source tool that is non-intrusive, easy-to-use, computationally efficient, and scalable to highly-parameterized inverse problems. The framework implements several types of linear (first-order, second-moment (FOSM)) and non-linear uncertainty analyses...

White, Jeremy; Fienen, Michael N.; Doherty, John E.

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Year Published: 2016

Macroinvertebrate and diatom metrics as indicators of water-quality conditions in connected depression wetlands in the Mississippi Alluvial Plain

Methods for assessing wetland conditions must be established so wetlands can be monitored and ecological services can be protected. We evaluated biological indices compiled from macroinvertebrate and diatom metrics developed primarily for streams to assess their ability to indicate water quality in connected depression wetlands. We collected water...

Justus, Billy; Burge, David; Cobb, Jennifer; Marsico, Travis; Bouldin, Jennifer

Filter Total Items: 265
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 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 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 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. 

August 7, 2017

Developing Effective Drought Monitoring Tools for Farmers and Ranchers

This webinar was conducted on August 7, 2017 as part of the USGS National Climate Change and Wildlife Science Center’s Climate Change Science and Management Webinar Series, held in partnership with the USFWS National Conservation Training Center. 

Webinar Summary: The South Central U.S. is one of the main agricultural regions in North America: annual agricultural

Loriolia texana fossils
June 15, 2017

Marker bed known as the Loriolia Bed

Marker bed known as the Loriolia Bed, found 80 feet below the contact of the Glen Rose Limestone and the Kainer Formation. The photograph was taken north of Farm to Market Road (FM) 195, approximately 1,500 feet west of the intersection of FM 220 and FM 195. The Loriolia texana fossils are identified by white arrows (photograph by Allan K. Clark, U.S. Geological Survey,

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Filter Total Items: 170
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

USGS science for a changing world logo
March 22, 2016

New research can help water managers along the Rio Grande make wise decisions about how to best use the flow of a river vital for drinking water, agriculture and aquatic habitat. These studies also show how conditions from the prolonged drought in the West have affected the Rio Grande watershed.

USGS science for a changing world logo
March 14, 2016

U.S. Geological Survey field crews are measuring record flooding in parts of eastern Texas following intense rainfall. Rainfall amounts of 18 – 20 inches over the last four days have led to record flooding and evacuations in eastern Texas.

Map showing epicenter of 5.1 Oklahoma earthquake on Feb 13th
February 13, 2016

A magnitude 5.1 earthquake struck in Oklahoma on February 13, 2016 at 11:07:06 am local time.

Image: USGS Measures Historic Flooding Across the Nation
January 4, 2016

U.S. Geological Survey field crews are measuring record flooding on rivers and streams in 12 states across the country. USGS is making preparations for a prolonged field effort along the Ohio and Mississippi Rivers as major flooding will extend well into mid-to-late January, particularly along the lower Mississippi River.

USGS
December 29, 2015

Since Saturday morning, parts of eastern Oklahoma received up to 12 inches of rain from Winter Storm Goliath. Water levels at many U.S. Geological Survey gages in that part of the state were already high due to previous rains.

A map showing the Barnett Shale assessment area in east Texas
December 17, 2015

The Barnett Shale contains estimated mean volumes of 53 trillion cubic feet of shale natural gas, 172 million barrels of shale oil and 176 million barrels of natural gas liquids, according to an updated assessment by the U.S. Geological Survey. This estimate is for undiscovered, technically recoverable resources.

Map: Area of Uranium Assessment in Texas
December 2, 2015

The uranium oxide is located in sandstone formations throughout the South Texas Coastal Plain, which borders the Gulf of Mexico. The area has long been known to contain uranium, and two mines are currently in operation, with a number of companies actively exploring for uranium.

Filter Total Items: 102