Unified Interior Regions

Region 6: Arkansas-Rio Grande-Texas-Gulf

Regions L2 Landing Page Tabs

Filter Total Items: 141
Date published: July 21, 2016
Status: Active

North American Waterfowl Management Plan

The ultimate success of North American Waterfowl Management Plan (NAWMP) depends on maintaining relevance to stakeholders and society. In order to be relevant, a first step is to better understand what people value in regard to waterfowl and their habitats. 

Date published: July 19, 2016
Status: Completed

Quantitative and Statistical Research Collaboration

Mathematical and statistical models are powerful research tools that play several important roles in conceptualizing and understanding the structure and dynamics of complicated ecological systems, including developing mechanistic hypotheses pertaining to ecological systems, designing studies that elucidate ecosystem structure and function, and extracting information from data.

Date published: June 22, 2016

Status and Trends of Emergent Wetlands in the Northern Gulf of Mexico: 1950-2010

Throughout the past century, emergent wetlands have been declining across the Gulf of Mexico. Emergent wetland ecosystems provide a plethora of resources including plant and wildlife habitat, commercial and recreational economic activity, water quality, and natural barriers against storms.

Contacts: Kathryn Spear
Date published: June 12, 2016
Status: Active

Rio Grande Transboundary Integrated Hydrologic Model: Modeling Conjunctive Use to Support Resource Management

The Palomas, Mesilla, and Conejos-Médanos Basins in New Mexico, Texas, and northern Mexico compose a geologically and hydrologically complex region. The conjunctive use of surface water and groundwater takes place under a myriad of legal and operational constraints, including the Rio Grande Compact, an international treaty, and the U.S. Bureau of Reclamation’s Rio Grande Project. New demands...

Contacts: Andre Ritchie
Date published: June 2, 2016
Status: Active

Paddlefish Tracking Map - Visualizing U.S. Fish and Wildlife Service Tower and Boat Observational Data

Partnering with the Caddo Lake Institute, the USGS WARC Advanced Applications Team developed a web-based mapping application that visualizes the paddlefish tracking observations being collected by FWS.

Date published: May 11, 2016
Status: Completed

Effect of Hurricane Wrack Deposition on Coastal Marsh Surface Elevation Change

Storm surge waves and tides of hurricanes have the propensity to wash up marsh detritus of dead reeds and leaf debris along with plastic trash and lumber, commonly referred to as wrack, from overwashed beaches, marshes, forests, streets, and lawns.

Date published: April 25, 2016
Status: Active

Gulf of Mexico Land Loss Change Assessment: A Cooperative Study with the Bureau of Ocean and Energy Management

Eighty-five percent of the coastal wetland loss in the contiguous United States occurs in the Gulf of Mexico. Documenting and understanding the occurrence of this wetland loss will provide for effective planning, mitigation, and restoration activities.

Date published: April 18, 2016
Status: Active

Environmental Flows and Bottomland Hardwood Habitat in the Southeastern U.S.

Environmental flows describes the quantity, quality, and timing of water flows required to sustain freshwater and estuarine ecosystems and the human livelihoods and well-being that depend on these ecosystems.

Contacts: Richard Day
Date published: April 18, 2016
Status: Active

Long-term Trends in Swamp Tree Growth across Drought and Salinity Gradients along the Northern Gulf Coast

This study will examine the potential effects of climate-change-induced sea level rise, drought and water extraction by examining tree growth patterns across the Gulf Coast, specifically targeting long-term research plots available in the North American Baldcypress Swamp Network (NABCSN) and the Suwannee River.

Date published: April 17, 2016
Status: Active

Mangrove Migration Network

At the poleward marsh-mangrove ecotone, mangrove abundance and coverage is winter temperature-sensitive in that it oscillates in response to the frequency, duration, and/or intensity of extreme winter temperatures. Future winter climate change is expected to facilitate poleward mangrove range expansion at the expense of salt marshes in Texas, Louisiana, and parts of Florida. 

Date published: April 17, 2016
Status: Active

Incorporating Future Change into Current Conservation Planning: Evaluating Wetland Migration along the Gulf of Mexico under Alternative Sea-Level Rise and Urbanization Scenarios

More than half of contiguous U.S. coastal wetlands are located along the Gulf of Mexico coast. These highly-productive wetlands support many ecosystem goods and services and fish and wildlife habitat. Historically, coastal wetlands have adapted to sea-level changes via lateral and vertical movement on the landscape. As sea levels rise in the future, coastal wetlands will adapt and migrate...

Filter Total Items: 1,619
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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

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Year Published: 2015

Sediment conditions in the San Antonio River Basin downstream from San Antonio, Texas, 2000-13

Sediment plays an important role in the ecological health of rivers and estuaries and consequently is an important issue for water-resource managers. To better understand sediment characteristics in the San Antonio River Basin, the U.S. Geological Survey, in cooperation with the San Antonio River Authority, completed a two-part study in the San...

Ockerman, Darwin J.; Banta, J. Ryan; Crow, Cassi L.; Opsahl, Stephen P.
Ockerman, D.J., Banta, J.R., Crow, C.L., and Opsahl, S.P., 2015, Sediment conditions in the San Antonio River Basin downstream from San Antonio, Texas, 2000–13: U.S. Geological Survey Fact Sheet 2015–3043, 4 p., http://dx.doi.org/10.3133/fs20153043.

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Year Published: 2015

Water data to answer urgent water policy questions: Monitoring design, available data and filling data gaps for determining the effectiveness of agricultural management practices for reducing tributary nutrient loads to Lake Erie

Throughout its history, the United States has made major investments in assessing natural resources, such as soils, timber, oil and gas, and water. These investments allow policy makers, the private sector and the American public to make informed decisions about cultivating, harvesting or conserving these resources to maximize their value for...

Bentanzo, Elin A.; Choquette, Anne F.; Reckhow, Kenneth H.; Hayes, Laura; Hagan, Erik R; Argue, Denise M.; Cangelosi, A.A.
Betanzo, E.A., Choquette, A.F., Reckhow, K.H., Hayes, L., Hagen, E.R., Argue, D.M., and Cangelosi, A.A., 2015, Water data to answer urgent water policy questions: Monitoring design, available data and filling data gaps for determining the effectiveness of agricultural management practices for reducing tributary nutrient loads to Lake Erie, Northeast-Midwest Institute Report, 169 p., http://www.nemw.org/.

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Year Published: 2015

Water resources of St. James Parish, Louisiana

Information concerning the availability, use, and quality of water in St. James 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. Information on the availability, past...

White, Vincent E.; Prakken, Lawrence B.
White, V.E., and Prakken, L.B., 2015, Water resources of St. James Parish, Louisiana: U.S. Geological Survey Fact Sheet 2015–3038, 6 p., http://dx.doi.org/10.3133/fs20153038.

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Year Published: 2015

Physical characteristics and fish assemblage composition at site and mesohabitat scales over a range of streamflows in the Middle Rio Grande, New Mexico, winter 2011-12, summer 2012

In winter 2011–12 and summer 2012, the U.S. Geological Survey (USGS), in cooperation with the U.S. Army Corps of Engineers, Albuquerque District and the U.S. Fish and Wildlife Service New Mexico Fish and Wildlife Conservation Office in Albuquerque, New Mexico, evaluated the physical characteristics and fish assemblage composition of...

Braun, Christopher L.; Pearson, Daniel K.; Porter, Michael D.; Moring, J. Bruce
Braun, C.L., Pearson, D.K., Porter, M.D., and Moring, J.B., 2015, Physical characteristics and fish assemblage composition at site and mesohabitat scales over a range of streamflows in the Middle Rio Grande, New Mexico, winter 2011–12, summer 2012: U.S. Geological Survey Scientific Investigations Report 2015–5025, 90 p., http://dx.doi.org/10.3133/sir20155025

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Year Published: 2015

Water levels and water quality in the Mississippi River Valley alluvial aquifer in eastern Arkansas, 2012

During the spring of 2012, the U.S. Geological Survey, in cooperation with the Arkansas Natural Resources Commission and the Arkansas Geological Survey, measured water levels in 342 wells completed in the Mississippi River Valley alluvial aquifer in eastern Arkansas. The Arkansas Natural Resources Commission measured water levels in 11 wells, and...

Schrader, Tony P.
Schrader, T.P., 2015, Water levels and water quality in the Mississippi River Valley alluvial aquifer in eastern Arkansas, 2012: U.S. Geological Survey Scientific Investigations Report 2015–5059, 63 p., 2 pls., http://dx.doi.org/10.3133/sir20155059.

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Year Published: 2015

Estimated water use in Arkansas, 2010

The Arkansas Natural Resources Commission (ANRC) conducts an annual inventory of reported groundwater and surface-water withdrawals in Arkansas in cooperation with the U.S. Geological Survey (USGS). This report describes withdrawals from groundwater and surface-water resources in Arkansas for 2010. The report compiles withdrawals by county for 10...

Pugh, Aaron L.; Holland, Terrance W.
Pugh, A.L., and Holland, T.W., 2015, Estimated water use in Arkansas, 2010: U.S. Geological Survey Scientific Investigations Report 2015–5062, 33 p., http://dx.doi.org/10.3133/sir20155062. ISSN 2328-0328 (online)

Filter Total Items: 266
Image shows a detail of a yellow mineral on white rock
December 31, 2015

Uranium-Vanadate Mineral in Calcrete

A uranium-vanadate mineral in calcrete. This sample came from near the Sulfur Springs Draw in Texas. USGS conducted an assessment of uranium resources in this region in 2015.

The sampling point on a large-volume public-supply well is designated
December 2, 2015

Sampling point for a large-volume public-supply well

A large-volume public supply well in San Antonio, Texas.  This well is being sampled for water-quality constituents as part of the NAWQA Enhanced Trend Network project.

A USGS hydrotech stands below the sampling point of a high-volume public-supply well
December 2, 2015

Sampling point for a large-volume public-supply well

A large-volume public supply well in San Antonio, Texas.  This well is being sampled for water-quality constituents as part of the NAWQA Enhanced Trend Network project.

Image shows USGS scientists standing beside a drill rig in protective gear.
September 16, 2015

Night Drilling for the Eagle Ford

USGS scientists drilling a research core near Waco, Texas. This core was drilled by USGS during field work for an oil and gas assessment for the Eagle Ford of the Gulf Coast Basins. Cores like these provide information on the various rock layers, such as their make-up, their age, etc.

The USGS assesses undiscovered, technically recoverable oil and gas resources for

...
Image shows USGS scientists standing beside a drill rig in protective gear.
September 16, 2015

Black and White Night Drilling for the Eagle Ford

USGS scientists drilling a research core near Waco, Texas. This core was drilled by USGS during field work for an oil and gas assessment for the Eagle Ford of the Gulf Coast Basins. Cores like these provide information on the various rock layers, such as their make-up, their age, etc.

The USGS assesses undiscovered, technically recoverable oil and gas resources for

...
Image shows USGS scientists standing beside a drill rig in protective gear.
September 16, 2015

Moonrise over Night Drilling for the Eagle Ford

USGS scientists drilling a research core near Waco, Texas. This core was drilled by USGS during field work for an oil and gas assessment for the Eagle Ford of the Gulf Coast Basins. Cores like these provide information on the various rock layers, such as their make-up, their age, etc.

The USGS assesses undiscovered, technically recoverable oil and gas resources for

...
Image shows USGS scientists standing beside a drill rig in protective gear.
September 16, 2015

Moonlight over Night Drilling for the Eagle Ford

USGS scientists drilling a research core near Waco, Texas. This core was drilled by USGS during field work for an oil and gas assessment for the Eagle Ford of the Gulf Coast Basins. Cores like these provide information on the various rock layers, such as their make-up, their age, etc.

The USGS assesses undiscovered, technically recoverable oil and gas resources for

...
Image shows USGS scientists standing beside a drill rig in protective gear.
September 16, 2015

Night Drilling for the Eagle Ford

USGS scientists drilling a research core near Waco, Texas. This core was drilled by USGS during field work for an oil and gas assessment for the Eagle Ford of the Gulf Coast Basins. Cores like these provide information on the various rock layers, such as their make-up, their age, etc.

The USGS assesses undiscovered, technically recoverable oil and gas resources for

...
A vehicle is shown at night, with its trunk open and floodlights on
September 16, 2015

Drilling at Night for the Eagle Ford

USGS scientists drilling a research core near Waco, Texas. This core was drilled by USGS during field work for an oil and gas assessment for the Eagle Ford of the Gulf Coast Basins. Cores like these provide information on the various rock layers, such as their make-up, their age, etc.

The USGS assesses undiscovered, technically recoverable oil and gas resources for

...
Image shows USGS scientists standing beside a drill rig in protective gear.
September 14, 2015

Core Drilling for the Eagle Ford

USGS scientists drilling a research core near Waco, Texas. This core was drilled by USGS during field work for an oil and gas assessment for the Eagle Ford of the Gulf Coast Basins. Cores like these provide information on the various rock layers, such as their make-up, their age, etc.

The USGS assesses undiscovered, technically recoverable oil and gas resources for

...
Image shows USGS scientists standing beside a drill rig in protective gear.
September 14, 2015

Drilling a Core for the Eagle Ford

USGS scientists drilling a research core near Waco, Texas. This core was drilled by USGS during field work for an oil and gas assessment for the Eagle Ford of the Gulf Coast Basins. Cores like these provide information on the various rock layers, such as their make-up, their age, etc.

The USGS assesses undiscovered, technically recoverable oil and gas resources for

...
Filter Total Items: 176
USGS science for a changing world logo
September 16, 2011

Simulated effects of withdrawing water from the Arbuckle-Simpson Aquifer in south-central Oklahoma are now available in a new U.S. Geological Survey report, done in cooperation with the Oklahoma Water Resources Board.

USGS science for a changing world logo
August 23, 2011

A magnitude-5.3 earthquake rattled southern Colorado Monday, August 22, at 11:46PM MDT, causing strong shaking, but minor damage, and was felt throughout the state of Colorado and neighboring states. The USGS Prompt Assessment of Global Earthquakes for Response (PAGER) system issued a Green Alert, indicating a low probability for fatalities or significant economic losses.

USGS science for a changing world logo
August 5, 2011

USGS scientists will join ecologists from around the world at the annual Ecological Society of America (ESA) meeting from August 7 - 12 at the Austin Convention Center in Austin, Tex. This year, USGS scientists will focus on topics such as invasive species and habitat changes.

USGS science for a changing world logo
July 6, 2011

Record flooding along the Souris River near Minot, N.D. and record drought at O.C. Fisher Lake near San Angelo, Texas have more than their contrasting water conditions in common.

These places, nearly 1,000 miles apart, are situated almost exactly north and south of each other near the100th meridian of longitude.  On average they have similar amounts of precipitation. 

USGS science for a changing world logo
April 26, 2011

U.S. Geological Survey crews are measuring all-time record flooding on the Illinois River in Oklahoma, and substantial flooding in Eastern and Northeastern parts of the state. 

USGS science for a changing world logo
March 28, 2011

New scientific research concludes that large earthquakes do not increase the global seismic hazard for more damaging earthquakes far from the mainshock. 

USGS science for a changing world logo
March 7, 2011

Studies to determine the quality and quantity of Oklahoma’s groundwater are underway by the U.S. Geological Survey and its partners. Oklahoma relies heavily on groundwater – 570 million gallons are used each day by more than 20,000 homeowners for household or yard use. This essential resource is vital for the health and well being of humanity and the environment.

USGS
December 17, 2010

All water quality samples collected from 28 wells near Houston, TX did not contain uranium and radioactive elements above the Environmental Protection Agency’s (EPA) maximum contaminant level (MCL) for treated drinking water, a new study shows.

USGS
October 29, 2010

In this USGS media tipsheet, we've gone through thousands of GSA conference abstracts and selected some of the newest, most exciting USGS science presentations for your convenience. We hope you find it useful.

USGS science for a changing world logo
October 13, 2009

Five giant non-native snake species would pose high risks to the health of ecosystems in the United States should they become established here, according to a U.S. Geological Survey (USGS) report released today.
The USGS report details the risks of nine non-native boa, anaconda and python species that are invasive or potentially invasive in the United States.

USGS science for a changing world logo
September 21, 2009

Idaho Developed Mapping Method Garners Prestigious Award. Data from earth observing Landsat satellites plays a central role in a new, award-winning type of mapping that tracks water use. Water-use maps help save taxpayer money by increasing the accuracy and effectiveness of public decisions involving water – for instance, in monitoring compliance with legal water rights. The maps are especially