Central portion of the Gulf Coast Aquifer SystemGroundwater Availability Model (GAM)This map shows the extent and location of the central portion of the Gulf Coast Aquifer System Groundwater Availability Model.

The Texas Water Development Board (TWDB) contracted with Waterstone Environmental Hydrology and Engineering, Inc. (who was teamed with Intera, Inc., Parsons Engineering Science, Inc., and several individual experts) to develop a model of the central part of the Gulf Coast Aquifer in Texas.

TWDB staff has since recalibrated the central part of the Gulf Coast Aquifer while honoring historical pumpage (see below).

Work is underway to update the groundwater availability models for both the Central and Southern sections of the Gulf Coast Aquifer. Please see the page for the Gulf Coast Aquifer System Groundwater Availability Model, which will include both GMAs 15 and 16.

Current GAM

Model Report

"Groundwater Availability Model of the Central Gulf Coast Aquifer System: Numerical Simulations through 1999."

Conceptual Model Report

"Groundwater Availability Model of the Central Gulf Coast Aquifer System: Numerical Simulations to 2050."

Figures from "Groundwater Availability of the Central Gulf Coast Aquifer: Numerical Simulations to 2050, Central Gulf Coast, Texas."

Model Files

Please see the GAM files download page for a copy of the model files.

Aquifer Data

Aquifer data is only available as a package for the entire model area and requires GIS software for processing. Please see the GAM files download page for aquifer data.

Stakeholder Advisory Forums (SAF)

Send us an email if you would like to receive SAF notifications.

ID Date Location
SAF 9 7/22/2004 Corpus Christi, Texas - Natural Resources Center (NRC) of the Texas A&M University
SAF 8 2/7/2003 Austin, Texas
SAF 7 10/22/2002 San Patricio Municipal Water District
SAF 6 8/15/2002 Bay City, Texas - Bay City Civic Center (201 7th Street)
SAF 5 5/1/2002 Corpus Christi, Texas - Natural Resources Center (NRC) of the Texas A&M University
SAF 4 2/20/2002 Victoria, Texas - Victoria Community Center Annex (2905 East North Street)
SAF 3 11/8/2001 Bay City, Texas - Bay City Civic Center (201 7th Street)
SAF 2 8/6/2001 Corpus Christi, Texas - Natural Resources Center (NRC) of the Texas A&M University
SAF 1 4/27/2001 Corpus Christi, Texas - Natural Resources Center (NRC) of the Texas A&M University

Other Resources

Please see the Gulf Coast Aquifer System, the GMA 16 Groundwater Flow Model, and the Research Projects in Support of Groundwater Models pages for other reports and publications.

For model runs see the GMA 15 page.

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