Unified Interior Regions

Region 6: Arkansas-Rio Grande-Texas-Gulf

Regions L2 Landing Page Tabs

Filter Total Items: 1,620
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Year Published: 2015

Using stable isotopes of carbon to investigate the seasonal variation of carbon transfer in a northwestern Arkansas cave

Stable-isotope analyses are valuable in karst settings, where characterizing biogeochemical cycling of carbon along groundwater flow paths is critical for understanding and protecting sensitive cave and karst water resources. This study quantified the seasonal changes in concentration and isotopic composition (δ13C) of aqueous and gaseous...

Knierim, Katherine J.; Pollock, Erik; Hays, Phillip D.; Khojasteh, Jam

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Year Published: 2015

Dry season mean monthly flow and harmonic mean flow regression equations for selected ungaged basins in Arkansas

The U.S. Geological Survey, in cooperation with the Arkansas Department of Environmental Quality, Southwestern Energy, the Arkansas Natural Resources Commission, and the Arkansas Game and Fish Commission, developed regression equations for estimation of dry season mean monthly flows and harmonic mean flows that are representative of natural...

Breaker, Brian K.
Breaker, B.K., 2015, Dry season mean monthly flow and harmonic mean flow regression equations for selected ungaged basins in Arkansas: U.S. Geological Survey Scientific Investigations Report 2015–5031, 25 p., http://dx.doi.org/10.3133/sir20155031.

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Year Published: 2015

Bibliography for acid-rock drainage and selected acid-mine drainage issues related to acid-rock drainage from transportation activities

Acid-rock drainage occurs through the interaction of rainfall on pyrite-bearing formations. When pyrite (FeS2) is exposed to oxygen and water in mine workings or roadcuts, the mineral decomposes and sulfur may react to form sulfuric acid, which often results in environmental problems and potential damage to the transportation infrastructure. The...

Bradley, Michael W.; Worland, Scott C.

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Year Published: 2015

Water resources of St. John the Baptist Parish, Louisiana

Information concerning the availability, use, and quality of water in St. John the Baptist 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...

White, Vincent E.; Prakken, Lawrence B.; Fendick, Robert B.

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Year Published: 2015

Potentiometric surface, 2013, and water-level differences, 1991-2013, of the Carrizo-Wilcox aquifer in northwest Louisiana

The Carrizo-Wilcox aquifer is the primary source of fresh groundwater for public supply as well as industrial, agricultural, and domestic uses in several parishes in northwestern Louisiana, including Bienville, Bossier, Caddo, De Soto, Natchitoches, Red River, Sabine, and Webster. In 2010, about 19 million gallons per day (Mgal/d) were withdrawn...

Fendick, Robert B.; Carter, Kayla
Fendick, R.B., Jr., and Carter, Kayla, 2015, Potentiometric surface, 2013, and water-level differences, 1991–2013, of the Carrizo-Wilcox aquifer in northwest Louisiana: U.S. Geological Survey Scientific Investigations Map 3311, 1 sheet, http://dx.doi.org/10.3133/sim3311.

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Year Published: 2015

Water resources of St. Charles Parish, Louisiana

Information concerning the availability, use, and quality of water in St. Charles 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. Charles Parish, Louisiana: U.S. Geological Survey Fact Sheet 2014–3118, 6 p., http://dx.doi.org/10.3133/fs20143118.

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Year Published: 2015

Water resources of La Salle Parish, Louisiana

Information concerning the availability, use, and quality of water in La Salle 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 and...

White, Vincent E.; Prakken, Lawrence B.
White, V.E., and Prakken, L.B., 2015, Water resources of La Salle Parish, Louisiana: U.S. Geological Survey Fact Sheet 2014–3089, 6 p., http://dx.doi.org/10.3133/fs20143089.

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Year Published: 2015

Potentiometric surfaces and water-level trends in the Cockfield (upper Claiborne) aquifer in southern Arkansas and the Wilcox (lower Wilcox) aquifer of northeastern and southern Arkansas, 2012

The Cockfield aquifer, located in southern Arkansas, is composed of Eocene-age sand beds found near the base of the Cockfield Formation of Claiborne Group. The Wilcox aquifer, located in northeastern and southern Arkansas, is composed of Paleocene-age sand beds found in the middle to lower part of the Wilcox Group. The Cockfield and Wilcox...

Rodgers, Kirk D.

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Year Published: 2015

Lithologic and hydrologic controls of mixed alluvial-bedrock channels in flood-prone fluvial systems: bankfull and macrochannels in the Llano River watershed, central Texas, USA

The rural and unregulated Llano River watershed located in central Texas, USA, has a highly variable flow regime and a wide range of instantaneous peak flows. Abrupt transitions in surface lithology exist along the main-stem channel course. Both of these characteristics afford an opportunity to examine hydrologic, lithologic, and sedimentary...

Heitmuller, Frank T.; Hudson, Paul F.; Asquith, William H.
Franklin T. Heitmuller, Paul F. Hudson, William H. Asquith, Lithologic and hydrologic controls of mixed alluvial–bedrock channels in flood-prone fluvial systems: Bankfull and macrochannels in the Llano River watershed, central Texas, USA, Geomorphology, Available online 24 December 2014, ISSN 0169-555X, http://dx.doi.org/10.1016/j.geomorph.2014.12.033. (http://www.sciencedirect.com/science/article/pii/S0169555X14006370)

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Year Published: 2015

Simulations of potential future conditions in the cache critical groundwater area, Arkansas

A three-dimensional finite-difference model for part of the Mississippi River Valley alluvial aquifer in the Cache Critical Groundwater Area of eastern Arkansas was constructed to simulate potential future conditions of groundwater flow. The objectives of this study were to test different pilot point distributions to find reasonable estimates of...

Rashid, Haveen M.; Clark, Brian R.; Mahdi, Hanan H.; Rifai, Hanadi S.; Al-Shukri, Haydar J.

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Year Published: 2015

Soil ecology of a rock outcrop ecosystem: Abiotic stresses, soil respiration, and microbial community profiles in limestone cedar glades

Limestone cedar glades are a type of rock outcrop ecosystem characterized by shallow soil and extreme hydrologic conditions—seasonally ranging from xeric to saturated—that support a number of plant species of conservation concern. Although a rich botanical literature exists on cedar glades, soil biochemical processes and the ecology of soil...

Cartwright, Jennifer M.; Advised by Dzantor, E. Kudjo
Cartwright, Jennifer M. Soil ecology of a rock outcrop ecosystem: Abiotic stresses, soil respiration, and microbial community profiles in limestone cedar glades. PhD. Dissertation. Tennessee State University, 2014.

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Year Published: 2014

Challenges and opportunities in protecting the Obed Wild and Scenic River

No abstract available.

Hughes, J. C.; Duncan, J. R.; Harrold, B. C.; Wolfe, William J.; Knight, Rodney R.

Filter Total Items: 266
May 24, 2015

Texas Flood Surveys

Hydrologists from Arizona aid the Texas Water Science Center in gathering measurements and other information after the catastrophic Blanco River flooding event that swept Austin, Texas.

This image shows a damaged street sign and flood debris left behind by record flood waters of the Blanco River near Martindale,
May 24, 2015

Blanco River 2015 Memorial Weekend Flood

Picturesque rivers of the Texas Hill Country can turn into raging torrents in the part of Texas known as Flash Flood Alley when storms drop many inches of rain in the river watersheds. This image shows a damaged street sign and flood debris left behind by record flood waters of the Blanco River near Martindale, TX on Memorial weekend, 2015.

Equipment for collecting a groundwater sample is spread on a table
April 1, 2015

Groundwater sample collection

Collecting a groundwater-quality sample from a public-supply well. This well is being sampled for water-quality constituents as part of the NAWQA Enhanced Trend Network project.

Photo of USGS streamgage measures flooding in the lower Trinity River
March 31, 2015

USGS streamgage measures flooding in the lower Trinity River

A USGS streamgage measures flooding in the lower Trinity River, Texas. 

For the first time, USGS scientists are now collecting real-time sediment and water-quality information on water traveling into Galveston Bay. A better understanding of sediment and freshwater flow into Galveston Bay is now available from a new USGS report, done in cooperation with the Texas

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Blue-winged Teal flying
March 28, 2015

Blue-winged Teal flying

A Blue-winged Teal flying over an sampling area in Texas.  Researchers were taking genetic samples for the Alaska Science Center.

Public-supply well
January 20, 2015

A chain-link fence encloses a 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: USGS Streamgage in Richmond, Texas
August 11, 2014

USGS Streamgage in Richmond, Texas

A modern 21st century-style streamgage on the Brazos River in Richmond, Texas.

Image: Previously active volcano site in Texas
May 31, 2014

Previously active volcano site in Texas

A site where volcanoes used to be active in the Chinati Mountains near Presidio, Texas. 

 

Filter Total Items: 176
USGS
June 25, 2007

Watch history in action as U.S. Geological Survey (USGS) scientists share the secrets of sampling for metals in water with the Indian Tribes from Oklahoma, New Mexico, Louisiana, Texas, and Arkansas U.S. Environmental Protection Agency (USEPA), Region VI.

USGS
June 5, 2007

The U.S. Geological Survey (USGS), in collaboration with National Weather Service (NWS), other Federal partners, and State and local stakeholders, has recently strengthened, or "hardened," 39 streamgages along the Texas Gulf Coast. 

USGS
May 15, 2007

Talks, workshops and demos in Tulsa, Okla., May 15-17, 2007

USGS science for a changing world logo
October 12, 2006

Scientists from the U.S. Geological Survey (USGS) released new data that illustrate the arrival of the massive dome of flood water that inundated much of southwest coastal Louisiana just before, during and after landfall of Hurricane Rita last fall. 

USGS science for a changing world logo
August 8, 2006

A report published by the U.S. Geological Survey (USGS) contains a regional map and an associated database that inventory 36 locations of reported natural asbestos and fibrous amphibole occurrences in the central United States.

USGS
June 5, 2006

Today, June 5, 2006, the U.S. Geological Survey (USGS) announces the recipients of the third year of the Mineral Resources External Research Program, a grant and/or cooperative agreement opportunity designed to support minerals research. 

USGS
September 24, 2005

The U.S. Geological Survey today is alerting state and federal agencies to the increased potential for landslides on September 24-28 in the Ozark-Ouachita mountainous regions of Arkansas, Oklahoma and Missouri due to anticipated heavy rainfall from Hurricane Rita.

USGS science for a changing world logo
September 24, 2005

The U.S. Geological Survey today is alerting state and federal agencies to the increased potential for landslides on September 24-28 in the Ozark-Ouachita mountainous regions of Arkansas, Oklahoma and Missouri due to anticipated heavy rainfall from Hurricane Rita.

USGS
August 1, 2005

In its latest report on water use in the United States, the USGS looked at the nation's dependence on ground water. The report entitled Estimated Withdrawals from Principal Aquifers in the United States, 2000, provides details of ground-water withdrawals and use from principal aquifers in each state.

USGS
June 22, 2005

The shiny black coating applied to parking lots and driveways has extremely high concentrations of a chemical compound that can affect the quality of water in urban areas, according to a recent joint USGS and City of Austin study.

USGS
September 16, 2004

Scientists at the U.S. Geological Survey (USGS) are closely watching the Gulf of Mexico shoreline to understand the impact of Hurricane Ivan. The shoreline in the Gulf is particularly vulnerable to storm surge and coastal change during hurricanes because of the low elevation, shoreline retreat and subsidence in the Mississippi Delta regions.