Wednesday 08, Dec 2021

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 Registration is closed for this event
Located at San Antonio Petroleum Club 8620 N. New Braunfels, 7th Floor 11:30am to 1:00pm

The Brackish Resources Aquifer Characterization System (BRACS) program of the Texas Water Development Board maps brackish aquifers to better understand water resources in the state. We completed a study of the Wilcox, Carrizo, Queen City, Sparta, and Yegua aquifers (oldest to youngest) in Central Texas, and published a report entitled “Brackish groundwater in aquifers of the Upper Coastal Plains, Central Texas” in December 2020. This presentation is an overview of our mapping efforts including mapping stratigraphy, lithology, and water quality from more than 5,000 well records. Data and interpretations used in the study are included in the publicly available BRACS database. To map water quality, we utilized public water quality measurements from water wells in the outcrop and less saline portions of the aquifers. However, to map salinity in the deeper, brackish portions of the aquifers where there are few measured water quality samples, we estimated TDS from resistivity logs using the Rwa minimum method. GIS datasets resulting from this study are available at:  The final report and plates may be downloaded here:

Evan Strickland is a licensed professional geoscientist at the Texas Water Development Board. He has been a member of the agency’s Brackish Resources Aquifer Characterization System (BRACS) since 2019 and is project manager of the Edwards-Trinity (Plateau) brackish groundwater study, scheduled for completion in 2023. Evan earned a Bachelor of Science in Geology from The University of Texas at Austin in 2010, and a Master of Science in Geology from Colorado State University in 2017. Evan has previous experience in the oil and gas industry with ExxonMobil as a geoscience technician, and the Railroad Commission of Texas, Groundwater Advisory Unit.

October 13th, 2021 11:30 AM   through   1:00 PM
17603 I-10
San Antonio, TX 78257
United States
Event Fee(s)
STGS Meeting Fee
Member Fee $ 25.00
Non-Member Fee $ 30.00
Pay at Door $ 0.00
Student Fee $ 0.00

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