Victoria G. Stengel

December 6, 2023

Hyperspectral (VNIR-SWIR) analysis of roll front uranium host rocks and industrial minerals from Karnes and Live Oak Counties, Texas Coastal Plain

VNIR-SWIR (400–2500 nm) reflectance measurements were made on the surfaces of various cores, cuttings and sample splits of sedimentary rocks from the Tertiary Jackson Group, and Catahoula, Oakville and Goliad Formations. These rocks vary in composition and texture from mudstone and claystone to sandstone and are known host rocks for roll front uranium occurrences in Karnes and Live Oak Counties, T

Authors

Bernard E. Hubbard, Tanya J. Gallegos, Victoria G. Stengel, Todd M. Hoefen, Raymond F. Kokaly, Brent Elliott

By

Water Resources Mission Area, Energy Resources Program, Geology, Energy & Minerals Science Center, Geology, Geophysics, and Geochemistry Science Center, Oklahoma-Texas Water Science Center, Spectroscopy Lab

June 22, 2023

Mapping abandoned uranium mine features using Worldview-3 imagery in portions of Karnes, Atascosa and Live Oak Counties, Texas

Worldview-3 (WV3) 16-band multispectral data were used to map exposed bedrock and mine waste piles associated with legacy open-pit mining of sandstone-hosted roll-front uranium deposits along the South Texas Coastal Plain. We used the “spectral hourglass” approach to extract spectral endmembers representative of these features from the image. This approach first requires calibrating the imagery to

Authors

Bernard E. Hubbard, Tanya J. Gallegos, Victoria G. Stengel

By

Water Resources Mission Area, Energy Resources Program, Geology, Energy & Minerals Science Center, Oklahoma-Texas Water Science Center

December 19, 2022

Mapping the probability of freshwater algal blooms with various spectral indices and sources of training data

Algal blooms are pervasive in many freshwater environments and can pose risks to the health and safety of humans and other organisms. However, monitoring and tracking of potentially harmful blooms often relies on in-person observations by the public. Remote sensing has proven useful in augmenting in situ observations of algal concentration, but many hurdles hinder efficient application by end user

Authors

Tyler Victor King, Stephen Hundt, Konrad Hafen, Victoria G. Stengel, Scott D. Ducar

By

Water Resources Mission Area, Idaho Water Science Center, Oklahoma-Texas Water Science Center

June 13, 2022

Spectral mixture analysis for surveillance of harmful algal blooms (SMASH): A field-, laboratory-, and satellite-based approach to identifying cyanobacteria genera from remotely sensed data

Algal blooms around the world are increasing in frequency and severity, often with the possibility of adverse effects on human and ecosystem health. The health and economic impacts associated with harmful algal blooms, or HABs, provide compelling rationale for developing new methods for monitoring these events via remote sensing. Although concentrations of chlorophyll-a and key pigments like phyco

Authors

Carl J. Legleiter, Tyler Victor King, Kurt D. Carpenter, Natalie Celeste Hall, Adam Mumford, E. Terrence Slonecker, Jennifer L. Graham, Victoria G. Stengel, Nancy Simon, Barry H. Rosen

By

Water Resources Mission Area, Idaho Water Science Center, New York Water Science Center, Oregon Water Science Center, Oklahoma-Texas Water Science Center, Florence Bascom Geoscience Center

June 12, 2022

A novel method for conducting a geoenvironmental assessment of undiscovered ISR-amenable uranium Resources: Proof-of-concept in the Texas Coastal Plain

A geoenvironmental assessment methodology was developed to estimate waste quantities and disturbances that could be associated with the extraction of undiscovered uranium resources and identify areas on the landscape where uranium and other constituents of potential concern (COPCs) that may co-occur with uranium deposits in this region are likely to persist, if introduced into the environment. Pri

Authors

Tanya J. Gallegos, Victoria G. Stengel, Katherine Walton-Day, Johanna Blake, Andrew Teeple, Delbert G Humberson, Steven M. Cahan, Douglas Yager, Kent D Becher

By

Water Resources Mission Area, Energy Resources Program, Colorado Water Science Center, Geology, Energy & Minerals Science Center, New Mexico Water Science Center, Oklahoma-Texas Water Science Center

March 28, 2022

A methodology to assess the historical environmental footprint of in-situ recovery (ISR) of uranium: A demonstration in the Goliad Sand in the Texas Coastal Plain, USA

In-situ recovery (ISR) has been the only technique used to extract uranium from sandstone-hosted uranium deposits in the Pliocene Goliad Sand in the Texas Coastal Plain. Water plays a crucial role throughout the ISR lifecycle of production and groundwater restoration yet neither the water use nor other environmental footprints have been well documented. The goal of this study is to examine histori

Authors

Tanya J. Gallegos, Annie Scott, Victoria G. Stengel, Andrew Teeple

By

Ecosystems Mission Area, Contaminant Biology, Energy Resources Program, Environmental Health Program, Toxic Substances Hydrology, Geology, Energy & Minerals Science Center, Oklahoma-Texas Water Science Center

July 2, 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, which is about 15 inches more than average annual amou

Authors

Kara M. Watson, Glenn R. Harwell, David S. Wallace, Toby L. Welborn, Victoria G. Stengel, Jeremy S. McDowell

By

Water Resources Mission Area, Oklahoma-Texas Water Science Center, Hurricane Harvey

October 17, 2017

The importance of parameterization when simulating the hydrologic response of vegetative land-cover change

Computer models of hydrologic systems are frequently used to investigate the hydrologic response of land-cover change. If the modeling results are used to inform resource-management decisions, then providing robust estimates of uncertainty in the simulated response is an important consideration. Here we examine the importance of parameterization, a necessarily subjective process, on uncertainty es

Authors

Jeremy T. White, Victoria G. Stengel, Samuel H. Rendon, John Banta

By

Water Resources Mission Area, Oklahoma-Texas Water Science Center

April 20, 2016

Simulation of streamflow and the effects of brush management on water yields in the Double Mountain Fork Brazos River watershed, western Texas 1994–2013

The U.S. Geological Survey, in cooperation with the City of Lubbock and the Texas State Soil and Water Conservation Board, developed and calibrated a Soil and Water Assessment Tool watershed model of the Double Mountain Fork Brazos River watershed in western Texas to simulate monthly mean streamflow and to evaluate the effects of brush management on water yields in the watershed, particularly to L

Authors

Glenn R. Harwell, Victoria G. Stengel, Johnathan R. Bumgarner

By

Water Resources Mission Area, Oklahoma-Texas Water Science Center

Carnotite with Finchite, Southern High Plains of Texas

November 20, 2018

Remote Sensing Techniques for Characterizing Energy Resources in Waste

Funded by the USGS Energy Resource Program “Shark Tank” grant. The goal of this project is to develop a method to use remotely collected satellite and airborne data to ascertain the quantity and quality of waste at abandoned uranium mines to better estimate the resource potential, identify abandoned mines and explore potential applications to other energy resources. This is a collaborative effort...

By

Energy Resources Program, Mineral Resources Program, Geology, Energy & Minerals Science Center

November 20, 2018

Remote Sensing Techniques for Characterizing Energy Resources in Waste

Funded by the USGS Energy Resource Program “Shark Tank” grant. The goal of this project is to develop a method to use remotely collected satellite and airborne data to ascertain the quantity and quality of waste at abandoned uranium mines to better estimate the resource potential, identify abandoned mines and explore potential applications to other energy resources. This is a collaborative effort...

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December 31, 2017

Mapping Conservation Management Efforts to Increase Coordination in the Rio Grande Basin

The Rio Grande provides drinking water for more than six million people, irrigation water for two million acres of land in the United States and Mexico, and supports riparian ecosystems that are home to endangered species like the ocelot and Rio Grande silvery minnow. Climate variability and anthropogenic activities continue to stress this already limited water resource. This project was developed

By

Climate Adaptation Science Centers

December 31, 2017

Mapping Conservation Management Efforts to Increase Coordination in the Rio Grande Basin

The Rio Grande provides drinking water for more than six million people, irrigation water for two million acres of land in the United States and Mexico, and supports riparian ecosystems that are home to endangered species like the ocelot and Rio Grande silvery minnow. Climate variability and anthropogenic activities continue to stress this already limited water resource. This project was developed

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Education and Certifications

Science and Products

Remote Sensing Techniques for Characterizing Energy Resources in Waste

Mapping Conservation Management Efforts to Increase Coordination in the Rio Grande Basin

Science and Products

Remote Sensing Techniques for Characterizing Energy Resources in Waste

Mapping Conservation Management Efforts to Increase Coordination in the Rio Grande Basin