Bureau of Land Management Solar Energy Program Western Solar Plan
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Groundwater Modeling for the Afton SEZ

The purpose of the Afton model is to assess potential impacts associated with groundwater withdrawals to support solar energy development in the vicinity of the Afton SEZ. This SEZ is located southwest of Las Cruces, New Mexico.

General terrain of Afton SEZ
General terrain of Afton SEZ

The Afton SEZ model is an update of the one-dimensional modeling performed as part of the Solar Programmatic Environmental Impact Statement. The model is based on the Theis-Jacob method, and it relies on a thorough review of available hydrogeologic data and an assessment of the sensitivity of parameter values. Twenty years of high-, medium-, and low-demand groundwater pumping at the SEZ were modeled, producing estimates of the additional groundwater drawdown due to full build-out of the SEZ. The medium-demand case was selected for sensitivity analyses.

Afton Model Report

The Afton SEZ model report has further information regarding its development and results.

Afton Model Download

The Afton model file is a single Excel spreadsheet.

Note: Alterations to the Afton Model could be made with the incorporation of new data regarding the hydrogeological framework and aquifer parameter values.

For questions regarding the Afton model, please contact John Quinn.

Updated: 11/11/2014