Llano Uplift Aquifer SystemGroundwater Availability Model (GAM)This map shows the extent and location of the Llano Uplift Aquifer System Groundwater Availability Model.

The Texas Water Development Board has developed a groundwater availability model for the Llano Uplift Aquifer System (Ellenburger-San Saba, Hickory, and Marble Falls). The numerical model report is now available.

Conceptual Model Report

"Conceptual Model Report: Minor Aquifers in Llano Uplift Region of Texas."

The geodatabase containing the source data files are available upon request and will be provided through a web transfer.

Model Files

Please contact David Thorkildsen (512-936-0871) for a copy of the model files.

Model Grid

Model grid cells are geographically assigned to counties, groundwater conservation districts, river basins, groundwater management areas, and regional water planning areas within the model study area using a centroid based approach. The model grid is available in ESRI® shapefile format and comma-delimited text file.

Download model grid.

Aquifer Data

Aquifer data is only available as a package for the entire model area and requires GIS software for processing. Due to the size of raw/source data files for this model, this information has not been posted on the web. To request the raw/source data, contact David Thorkildsen (512-936-0871).

Stakeholder Advisory Forums (SAF)

ID Date Location
SAF 1 7/17/2012 Fredericksburg, Texas - Hill Country University Center
SAF 2 9/30/2014 Fredericksburg, Texas - Hill Country University Center
SAF 3 3/16/2016 Fredericksburg, Texas - Hill Country University Center

Other Resources

Please see the Ellenburger-San Saba, Hickory, and Marble Falls, aquifer pages, and the Research Projects in Support of Groundwater Models page for other reports and publications.

Reseach Projects in Support of Groundwater Models

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