Southwest Research Institute® (SwRI®) News

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SwRI to characterize groundwater in Carrizo-Wilcox aquifer

San Antonio — May 10, 2006 — A hydrology study by Southwest Research Institute® (SwRI®), currently under way in South Texas, represents the Institute’s first close look at water supplies and water usage in the Carrizo-Wilcox aquifer.

The five-month study for the Wintergarden Groundwater Conservation District, with headquarters in Carrizo Springs, will assess current groundwater conditions and trends in the sand aquifer beneath Dimmit, La Salle and Zavala counties in light of historical usage.

"The study will help to determine whether the long-term water levels of the Carrizo-Wilcox aquifer are decreasing, remaining the same or recovering within their district," said Dr. Ronald Green, a staff scientist in SwRI's Geosciences and Engineering Division. "Knowing the long-term trends helps with resource planning and management." He said, "Once you've determined how, and how quickly, the aquifer recharges under different conditions, you can then plan more effectively for water usage and water quality maintenance." 

The Carrizo-Wilcox is an extensive, sand-based aquifer that underlies a large portion of South and Central Texas. It provides drinking water for municipalities and individual residences and irrigation for agricultural operations.

Earlier SwRI studies have addressed geology, hydrology, groundwater characterization and patterns of movement within the Edwards limestone aquifer in Bexar County and also in Uvalde and Kinney counties west of San Antonio.

For more information contact Joe Fohn at (210) 522-4630, Communications Department, PO Drawer 28510, San Antonio, TX 78228-0510. 

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