Llano Uplift Aquifer SystemGroundwater Availability Model (GAM)
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.
Numerical Model Report
Conceptual Model Report
The geodatabase containing the source data files are available upon request and will be provided through a web transfer.
Other Pertinent Studies
Please contact the GAM Section (512-936-0871) for a copy of the model files.
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.
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)
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.