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Texas Groundwater Availability Modeling Program: Groundwater Science for the 21st Century

Texas Groundwater Availability Modeling Program: Groundwater Science for the 21st Century. Bill Mullican Texas Water Development Board Western States Water Council December, 2003. groundwater and Texas. 60 percent of the 16.6 million acre-feet of water used in 1999

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Texas Groundwater Availability Modeling Program: Groundwater Science for the 21st Century

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  1. Texas Groundwater Availability Modeling Program:Groundwater Science for the 21st Century Bill Mullican Texas Water Development Board Western States Water Council December, 2003

  2. groundwaterandTexas • 60 percent of the 16.6 million acre-feet of water used in 1999 • 81 percent of groundwater is used for irrigation • groundwater provides 39 percent of water to cities

  3. groundwater and surface-water use by county > 55% groundwater 45 to 55% groundwater and surface water > 55% surface water

  4. availabilityanduse

  5. GAM • Purpose: to develop tools that can be used to help GCDs, RWPGs, and others assess groundwater availability. • Public process: you get to see how the model is put together. • Freely available: standardized, thoroughly documented, and available over the internet. • Living tools: periodically updated.

  6. What is a Numerical Groundwater Flow Model? • ‘The aquifer in a computer!’

  7. geology structure digital elevation models water levels water-level variations soil maps precipitation water quality stream flows spring flows lake levels hydraulic properties pumping cultural references satellite imagery geophysical mapping well information Groundwater models are data hungry:

  8. Do we haveto use GAM? • Water Code & TWDB rules require that GCDs use GAM information. Other information can be used in conjunction with GAM information. • TWDB rules require that RWPGs use GAM information unless there is better site specific information available

  9. GAMs andgroundwateravailability • A GAM is a tool that can be used to assess groundwater availability once GCDs and RWPGs decide how to define groundwater availability.

  10. How do weuse GAM? • The model • predict water levels and flows in response to pumping and drought • effects of well fields • Data in the model • water in storage • recharge estimates • hydraulic properties • GCDs and RWPGs can request runs

  11. Land Use

  12. Historical and Future Pumping

  13. Simulated Drawdown for 2050

  14. Simulated 2050 Saturated Thickness

  15. N Pumping rate(acre-feet/yr) 5000 1000 500 100 50 10 5 1 0 30 mile 0 Total Pumping Rate 2005 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  16. PUMPING RATE HISTORY

  17. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 1950 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  18. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 1955 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  19. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 1960 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  20. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 1965 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  21. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 1970 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  22. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 1975 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  23. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 1980 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  24. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 1985 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  25. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 1990 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  26. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 1995 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  27. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 2000 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  28. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 2005 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  29. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 2010 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  30. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 2015 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  31. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 2020 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  32. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 2025 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  33. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 2030 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  34. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 2035 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  35. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 2040 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  36. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 2045 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  37. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 2050 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  38. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 1950 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  39. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 1955 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  40. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 1960 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  41. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 1965 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

  42. N Saturated thickness (ft) 700 600 500 400 300 200 100 50 0 30 mile 0 Simulated Saturated Thickness 1970 COLORADO KANSAS NEW MEXICO OKLAHOMA TEXAS TEXAS NEW MEXICO TEXAS OKLAHOMA

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