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Groundwater Management Area (GMA) Process and Implementations

Groundwater Management Area (GMA) Process and Implementations. TWCA Mid-Year Conference Galveston, Texas. Gary Westbrook, General Manager Post Oak Savannah GCD. Preliminary Desired Future Conditions Groundwater Management Area 12. Primarily Based on Water Levels (WL)

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Groundwater Management Area (GMA) Process and Implementations

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  1. Groundwater Management Area (GMA) Processand Implementations TWCA Mid-Year Conference Galveston, Texas Gary Westbrook, General Manager Post Oak Savannah GCD

  2. Preliminary Desired Future ConditionsGroundwater Management Area 12 • Primarily Based on Water Levels (WL) • Definitive and Direct Measurement of Groundwater (GW) • Reliable and consistent • WL used to calibrate GAMs • Key GW issues can be addressed through analysis of WL • Protection of Existing Users (WL compared to well screens) • Change in Aquifer Storage (change in WL x aquifer storativity) • GW-SW interaction (WL compared to bottom of stream) • Flow Direction and Amount (application of Darcy’s Law)

  3. Post Oak Savannah GCDPriorities and Concerns • Needs of well owners and land owners within GMA 12 • Improvement of Groundwater Availability Model for GMA 12 • Include more available data for calibration • Improve SW-GW interaction, Recharge, & Faults • Focus on DFCs • Define function and purpose of DFCs • Use MAG as guideline, but manage based on DFC • Provides actual evidence of impacts • Monitoring Network and Program

  4. Post Oak Savannah GCD • Website: www.posgcd.org • Regularly scheduled Board meetings on second Tuesdays of month @ District office @ 5:30 pm • Office hours Monday - Friday 8:00 am to 4:00 pm • Phone: 512-455-9900 Fax: 512-455-9909 • Email: posgcd@tconline.net

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