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Region 6: Arkansas-Rio Grande-Texas-Gulf

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Filter Total Items: 88
This photo of a Pacific sheath-tailed bat is the last good photo of this bat from Aguiguan in existence.
Date Published: August 1, 2016

Ecology of Insect-eating Bats

Bats are the only flying mammals that are active mostly at night and occur on all continents except Antarctica. Bats are ecologically diverse, with a range of species that specialize in feeding on fruit, nectar, blood, fish, small mammals, and insects. However, of the more than 1,100 known species of bats on Earth, the majority specialize in feeding on insects. In the United States for example...

a birder on a bridge looking at the birds
Date Published: July 26, 2016
Status: Active

HDgov: Multi-agency Website for Human Dimensions of Natural Resources

HDgov is an interactive and mobile-responsive online portal to interagency, academic, and non-government resources focused on the human dimensions of natural resource management. The web portal provides easy access to tools, publications, data, and methods that help ensure that the people side of natural resources is considered throughout the entire natural resource management process. The...

A crowd of people in a National Park.
Date Published: July 26, 2016
Status: Active

National Park Service Visitor Spending Effects

The National Park Service (NPS) manages the Nation’s most iconic destinations that attract millions of visitors from across the Nation and around the world. Trip-related spending by NPS visitors generates and supports a considerable amount of economic activity within park gateway communities. USGS economists collaborate with the National Park Service social science program to estimate NPS...

A cutthroat trout. Photo by James Roberts, USGS.
Date Published: July 21, 2016

Using Quantile Regression to Investigate Ecological Limiting Factors

Unexplained heterogeneity in statistical models of animal responses to their physical environment is reasonable to expect because the measured habitat resources are a constraint on—but not the sole determinant of—abundance, survival, fecundity, or fitness. The ecological understanding and reliability of management predictions based on animal habitat models can be improved by shifting focus ...

Migratory Bird Hunting Stamp
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. Without this information, NAWMP population, habitat, and people objectives may not reflect stakeholder and societal values; and management...

The sunset on the main city beach in Laguna Beach, CA.
Date Published: July 19, 2016

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.

Mobile Bay, Alabama study area: Emergent wetlands, 1956
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
Boundary of Model Grid, NM Water Science Center
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
Caddo Lake Institute - Paddlefish Finder - Tracking Map
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.

Real-time kinematic GPS surveys combined with complimentary ground leveling
Date Published: May 11, 2016

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.

Mangrove Migration Network
Date Published: April 17, 2016

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. 

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Year Published: 2016

New insights into the Edwards Aquifer—Brackish-water simulation, drought, and the role of uncertainty analysis

The Edwards aquifer is an important water resource in south-central Texas, providing water for residents, businesses, and ecosystems. The aquifer is a highly complex karst system characterized by areas of rapid groundwater flow, faulted and fractured Cretaceous-age rocks, and multiple water-quality zones. Karst aquifer systems include soluble...

Foster, Linzy K.; White, Jeremy T.
Foster, L.K., and White, J.T., 2016, New insights into the Edwards aquifer—Brackish-water simulation, drought, and the role of uncertainty analysis: U.S. Geological Survey Fact Sheet 2016–3002, 6 p., http://dx.doi.org/10.3133/fs20163002.

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Year Published: 2016

Potentiometric surfaces of the Arnold Engineering Development Complex Area, Arnold Air Force Base, Tennessee, May and September 2011

Arnold Air Force Base occupies about 40,000 acres in Coffee and Franklin Counties, Tennessee. The primary mission of Arnold Air Force Base is to provide risk-reduction information in the development of aerospace products through test and evaluation. This mission is achieved in part through test facilities at Arnold Engineering Development Complex...

Haugh, Connor J.; Robinson, John A.
Haugh, C.J., and Robinson, J.A., 2016, Potentiometric surfaces of the Arnold Engineering Development Complex area, Arnold Air Force Base, Tennessee, May and September 2011: U.S. Geological Survey Scientific Investigations Report 2015–5165, 23 p., http://dx.doi.org/10.3133/sir20155165.

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Year Published: 2016

Fish assemblage composition and mapped mesohabitat features over a range of streamflows in the Middle Rio Grande, New Mexico, winter 2011-12, summer 2012

This report documents differences in the mapped spatial extents and physical characteristics of in-channel fish habitat evaluated at the mesohabitat scale during winter 2011–12 (moderate streamflow) and summer 2012 (low streamflow) at 15 sites on the Middle Rio Grande in New Mexico starting about 3 kilometers downstream from Cochiti Dam and...

Pearson, Daniel K.; Braun, Christopher L.; Moring, J. Bruce
Pearson, D.K., Braun, C.L., and Moring, J.B., 2015, Fish assemblage composition and mapped mesohabitat features over a range of streamflows in the Middle Rio Grande, New Mexico, winter 2011–12, summer 2012: U.S. Geological Survey Scientific Investigations Map 3350, 7 sheets, http://dx.doi.org/10.3133/sim3350.

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Year Published: 2016

Summary of U.S. Geological Survey studies conducted in cooperation with the Citizen Potawatomi Nation, central Oklahoma, 2011–14

The U.S. Geological Survey conducted hydrologic studies and published three U.S. Geological Survey scientific investigations reports in cooperation with the Citizen Potawatomi Nation from 2011 to 2014 to characterize the quality and quantity of water resources. The study areas of those reports consisted of approximately 960 square miles in parts...

Andrews, William J.; Becker, Carol J.; Ryter, Derek W.; Smith, S. Jerrod
Andrews, W.J., Becker, C.J., Ryter, D.W., and Smith, S.J., 2016, Summary of U.S. Geological Survey studies conducted in cooperation with the Citizen Potawatomi Nation, central Oklahoma, 2011–14: U.S. Geological Survey Scientific Investigations Report 2015–5182, 22 p., http://dx.doi.org/10.3133/sir20155182.

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Year Published: 2016

Hydrogeological framework, numerical simulation of groundwater flow, and effects of projected water use and drought for the Beaver-North Canadian River alluvial aquifer, northwestern Oklahoma

This report describes a study of the hydrology, hydrogeological framework, numerical groundwater-flow models, and results of simulations of the effects of water use and drought for the Beaver-North Canadian River alluvial aquifer, northwestern Oklahoma. The purpose of the study was to provide analyses, including estimating equal-proportionate-...

Ryter, Derek W.; Correll, Jessica S.
Ryter, D.W., and Correll, J.S., 2016, Hydrogeological framework, numerical simulation of groundwater flow, and effects of projected water use and drought for the Beaver-North Canadian River alluvial aquifer, northwestern Oklahoma (ver.1.1, February 2016): U.S. Geological Survey Scientific Investigations Report 2015–5183, 63 p., http://dx.doi.org/10.3133/sir20155183.

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Year Published: 2015

Spatial and temporal migration of a landfill leachate plume in alluvium

Leachate from unlined or leaky landfills can create groundwater contaminant plumes that last decades to centuries. Understanding the dynamics of leachate movement in space and time is essential for monitoring, planning and management, and assessment of risk to groundwater and surface-water resources. Over a 23.4-year period (1986–2010), the...

Masoner, Jason R.; Cozzarelli, Isabelle M.

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Year Published: 2015

Regional potentiometric surface of the Ozark aquifer in Arkansas, Kansas, Missouri, and Oklahoma, November 2014–January 2015

The Ozark aquifer, within the Ozark Plateaus aquifer system (herein referred to as the “Ozark system”), is the primary groundwater source in the Ozark Plateaus physiographic province (herein referred to as the “Ozark Plateaus”) of Arkansas, Kansas, Missouri, and Oklahoma. Groundwater from the Ozark system has historically...

Nottmeier, Anna M.
Nottmeier, A.M., 2015, Regional potentiometric surface of the Ozark aquifer in Arkansas, Kansas, Missouri, and Oklahoma, November 2014–January 2015: U.S. Geological Survey Scientific Investigations Map 3348, 1 sheet, http://dx.doi.org/10.3133/sim3348.

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Year Published: 2015

Potentiometric surface of the Catahoula aquifer in central Louisiana, 2013

The Catahoula aquifer is an important source of fresh groundwater in central Louisiana. In 2010, about 3.96 million gallons per day (Mgal/d) were withdrawn from the Catahoula aquifer in Louisiana. In 2012, the U.S. Geological Survey in cooperation with the Louisiana Department of Natural Resources began a study to document current water levels in...

Fendick, Jr., Robert B.; Carter, Kayla
Fendick, R.B., Jr., and Carter, Kayla, 2015, Potentiometric surface of the Catahoula aquifer in central Louisiana, 2013: U.S. Geological Survey Scientific Investigations Map 3339, 1 sheet, http://dx.doi.org/10.3133/sim3339.

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Year Published: 2015

Simulation of the effects of different inflows on hydrologic conditions in Lake Houston with a three-dimensional hydrodynamic model, Houston, Texas, 2009–10

Lake Houston, an important water resource for the Houston, Texas, area, receives inflows from seven major tributaries that compose the San Jacinto River Basin upstream from the reservoir. The effects of different inflows from the watersheds drained by these tributaries on the residence time of water in Lake Houston and closely associated physical...

Rendon, Samuel H.; Lee, Michael T.
Rendon, S.H., and Lee, M.T., 2015, Simulation of the effects of different inflows on hydrologic conditions in Lake Houston with a three-dimensional hydrodynamic model, Houston, Texas, 2009–10: U.S. Geological Survey Scientific Investigations Report 2015–5153, 42 p., http://dx.doi.org/10.3133/sir20155153.

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Year Published: 2015

Nutrient-enhanced decomposition of plant biomass in a freshwater wetland

We studied soil decomposition in a Panicum hemitomon (Schultes)-dominated freshwater marsh located in southeastern Louisiana that was unambiguously changed by secondarily-treated municipal wastewater effluent. We used four approaches to evaluate how belowground biomass decomposition rates vary under different nutrient regimes in this...

Bodker, James E.; Turner, Robert Eugene; Tweel, Andrew; Schulz, Christopher; Swarzenski, Christopher M.
Bodker, JE, Turner, RE, Tweel, A, Schulz, C, and Swarzenski, C (2015) Nutrient-enhanced decomposition of plant biomass in a freshwater wetland. Aquatic Botany v 127, p. 44-52

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Year Published: 2015

myScience—Engaging the public in U.S. Geological Survey science

myScience (http://txpub.usgs.gov/myscience/) is a Web application developed by the U.S. Geological Survey (USGS) Texas Water Science Center through a partnership with the USGS Community for Data Integration to address the need for increasing public awareness and participation in existing USGS citizen science projects. The myScience application...

Holl, Sally
Holl, Sally, 2015, myScience—Engaging the public in U.S. Geological Survey Science: U.S. Geological Survey Fact Sheet 2015–3070, 2 p., http://dx.doi.org/10.3133/fs20153070.

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Year Published: 2015

Discharge, suspended sediment, and salinity in the Gulf Intracoastal Waterway and adjacent surface waters in South-Central Louisiana, 1997–2008

Discharge, suspended sediment, and salinity data collected between 1997 and 2008 indicate that the Gulf Intracoastal Waterway (GIWW) is an important distributary of river water and suspended sediments to coastal wetlands in south-central coastal Louisiana. Following natural hydraulic gradients, the GIWW passively distributes freshwater and...

Swarzenski, Christopher M.; Perrien, Scott M.
Swarzenski, C.M., and Perrien, S.M., 2015, Discharge, suspended sediment, and salinity in the Gulf Intracoastal Waterway and adjacent surface waters in south-central Louisiana, 1997–2008: U.S. Geological Survey Scientific Investigations Report 2015–5132, 21 p., http://dx.doi.org/10.3133/sir20155132.

Filter Total Items: 265
Groundwater-monitoring well in Osage County, Oklahoma.
April 5, 2017

Groundwater-monitoring well in Osage County, Oklahoma.

Groundwater-monitoring well and telemetry equipment in Osage County, Oklahoma

March 31, 2017

Drilling a Research Well in the Eagle Ford

USGS scientists drill a research well near Waco, Texas, as part of the assessment of oil and gas resources in the Eagle Ford Group.  Cores like these provide information on the various rock layers, such as their make-up, their age, etc. 

March 31, 2017

Awareness: USGS "Water-on-the-Go" Mobile App (Texas)

The USGS Texas Water Science Center has developed a new mobile application called “Water On-the-Go” that gives people easy access to current conditions in streams across Texas. The information reflects what is happening in streams near you at that very moment. Go to -- https://txpub.usgs.gov/water-onthego

...
March 31, 2017

Be Water Aware: USGS "Water-on-the-Go" Mobile Application

The USGS Texas Water Science Center has developed a new mobile application called “Water On-the-Go” that gives people easy access to current conditions in streams across Texas. The information reflects what is happening in streams near you at that very moment. Go to -- https://txpub.usgs.gov/water-onthego

...
Kansas Wildfires, March 2017, Landsat 8
March 31, 2017

March Wildfires Scorch Kansas, Oklahoma Farm and Ranch Land

This March 2017 Landsat 8 image shows massive burned scars in Kansas and Oklahoma. More than 730,000 acres of farm and ranchland were scorched by wind-driven wildfires that began March 6 and were finally extinguished on March 22.

Satellite image showing burn damage caused by fires.
March 17, 2017

Fires Burn Farms and Ranches in Oklahoma and Kansas

Landsat's shortwave infrared (SWIR) band measures reduced moisture content in soil and vegetation. When combined with its near-infrared (NIR) band, which helps reveal actively growing vegetation, Landsat produces highly accurate images and maps of burned areas.

U.S. Geological Survey streamflow-gaging station 08111000 Navasota River near Bryan, Texas, upstream from U.S. Hwy. 190.
August 27, 2016

USGS station 08111000 Navasota River near Bryan, Texas, SIR 2009–5174

U.S. Geological Survey streamflow-gaging station 08111000 Navasota River near Bryan, Texas, looking upstream from U.S. Highway 190 bridge, August 27, 1975.

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USGS
October 30, 2015

U.S. Geological Survey field crews are measuring record flooding in parts of central Texas following intense rainfall.

USGS science for a changing world logo
October 26, 2015

The rate of earthquakes has increased sharply since 2009 in the central and eastern United States, with growing evidence confirming that these earthquakes are primarily caused by human activity, namely the injection of wastewater in deep disposal wells.

Image: Hallettsville, Texas Streamgage
September 15, 2015

The U.S. Geological Survey installed a new gage to be used for streamflow monitoring in the City of Hallettsville, Texas.

Image: San Angelo Streamgage
September 15, 2015

A newly installed U.S. Geological Survey streamgage on the South Concho River is providing dam operators and downstream users critical information about the river.

USGS
July 23, 2015

Scientists have a better understanding of how water flows throughout the San Antonio, Texas, segment of the Edwards aquifer because of a new U.S. Geological Survey groundwater flow model, developed in cooperation with San Antonio Water System.

USGS
June 18, 2015

Several U.S. Geological Survey field crews are measuring flooding in south-central Oklahoma due to heavy rainfall from the remnants of Tropical Depression Bill.

Graphic showing new interactive geologic map of Texas.
June 2, 2015

Do you know where to find extinct volcanoes or where the dinosaurs once roamed in Texas? Can you find where unconventional oil and gas formations are present at the land surface? A new interactive map viewer displaying the geology of Texas will help you explore what’s under your feet and across the state!

USGS
May 20, 2015

As moderate to major flooding in southern Oklahoma continues, multiple crews of U.S. Geological Survey scientists are in the field measuring how the recent heavy rains are impacting streamflows and streamgages.

USGS
March 6, 2015

Reactivated faults that have produced thousands of Oklahoma earthquakes are capable of causing larger seismic events, according to U.S. Geological Survey research published today in Geophysical Research Letters.

USGS
December 18, 2014

Secretary of the Interior Sally Jewell announced today that Interior’s South Central Climate Science Center is awarding nearly $550,000 to universities and other partners for research to guide managers of parks, refuges and other cultural and natural resources in planning how to help species and ecosystems adapt to climate change.

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