Groundwater Management Area (GMA) Process and Implementations

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Groundwater Management Area (GMA) Processand
Implementations

• TWCA Mid-Year Conference
• Galveston, Texas

Gary Westbrook, General Manager Post Oak Savannah
GCD
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Preliminary Desired Future Conditions
Groundwater 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 Darcys
  Law)

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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

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Post Oak Savannah GCD

• Website www.posgcd.org
• Regularly scheduled Board meetings on second
  Tuesdays of month _at_ District office _at_ 530 pm
• Office hours Monday - Friday 800 am to 400 pm
• Phone [phone] Fax [phone]
• Email posgcd_at_tconline.net