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Status of the Central Hays County Groundwater Evaluation

Presentation on the status of groundwater evaluation in Hays County, Texas, focusing on Trinity Aquifer and Theis Equation. Discusses groundwater flow, well performance prediction, water quality issues due to faulting, and numerical modeling.

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Status of the Central Hays County Groundwater Evaluation

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  1. Status of the Central Hays CountyGroundwater Evaluation Brian A. Smith, Ph.D., P.G. Brian B. Hunt, P.G. Barton Springs/Edwards Aquifer Conservation District Presentation to Hays County Commissioners Court April 7, 2015

  2. Trinity Aquifer(s)

  3. TWDB 2009

  4. Theis Equation • A method for evaluating non-equilibrium, radial flow to a pumping well

  5. Driscoll’s Comments on Theis Assumptions • These assumptions appear to limit severely the use of the two equations. In reality, however they do not. For example, uniform hydraulic conductivity is rarely found in a real aquifer, but the average hydraulic conductivity as determined from pumping tests has proven to be reliable for predicting well performance. Fletcher Driscoll, Groundwater and Wells, 1986

  6. Faulting,groundwater flow and water quality AAPG

  7. Wong et al. 2014

  8. Wong et al. 2014

  9. Water Wells and Monitoring

  10. Numerical Groundwater Modeling

  11. Mace et al. 2000

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