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Water Management Exercise

Water Management Exercise. Terms and Definitions. ESP = Ensemble Streamflow Prediction Acer-Foot (AF) The volume of water that will cover an area of one acre to a depth of one foot = 43,560 cubic feet. KAF = Kilo AF or 1000 AF

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Water Management Exercise

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  1. Water Management Exercise

  2. Terms and Definitions • ESP = Ensemble Streamflow Prediction • Acer-Foot (AF) • The volume of water that will cover an area of one acre to a depth of one foot = 43,560 cubic feet. • KAF = Kilo AF or 1000 AF • The volume of water that will cover an area of 1000 acres to a depth of one foot = 43,560,000 cubic feet.

  3. 80 74 KAC-ft 60 Volume 45 40 20 20

  4. 80 74 Max KAC-ft 60 75 % - below (25 % above) Volume 45 50 % - above below 40 25 % - below (75 % above) 20 20 Min

  5. 80 74 KAC-ft 60 Volume 45 40 20 20

  6. 80 76 KAC-ft 70 60 Volume 45 40 20 20

  7. 80 76 KAC-ft 70 60 Volume 45 40 20 20

  8. 80 76 KAC-ft 70 60 54 Volume 45 40 30 20 20

  9. Scenario • You are the water manager for a reservoir that supplies a large metropolitan area • Dam 500 feet high • Capacity of the Reservoir 500 KAF • 500 KAF corresponds to 250 feet • 1 foot ≈ 2 KAF • Over 500 KAF will cause topping of the dam and flooding the town • Safe max release (channel capacity downstream) = 2 KAD/day (use 60 KAF/Month) • Minimum environmental Release = 0. KAF/day (use 15 KAF/month) • Goal is to have the highest water height (elevation) on August 1 without ever flooding the town. • Starting water height is 225 feet (450 KAF)

  10. Forecast from ESP Per Month

  11. March 1 Make a Release ScheduleMax is 60 KAF/month & Min is 15 KAF/mo Start 450 KAF (250 ft) Fcst In Total KAF March ________ KAF + _____ = _____ April _________ KAF + _____ = _____ May _________ KAF + _____ = _____ June _________ KAF + _____ = _____ July _________ KAF + _____ = _____

  12. March Forecast from ESP Per Month

  13. Make a Release ScheduleMax is 60 KAF/month & Min is 15 KAF/mo Start 450 KAF (225 ft) Fcst In Total KAF March __-20____ KAF + __10__ = _440__ April ___-25____ KAF + __15___ = _450_ May ___-30____ KAF + _ 40____ = _460___ June ___-25 ____ KAF + __45___ = _ 480___ July ___-35_____ KAF + _55___ = _500___

  14. April Forecast from ESP Per Month Actual in March 15 KAF

  15. April Make a New Release ScheduleMax is 60 KAF/month & Min is 15 KAF/moActual Increase was 15 KAF Start 445 KAF (222.5 ft) Fcst In Total KAF April ___-20 ____ KAF + __15___ = _440_ May ___-30____ KAF + _ 40____ = _450___ June ___-25 ____ KAF + __45___ = _ 480___ July ___-35_____ KAF + __55___ = _500___

  16. 80 74 KAC-ft 60 Volume 45 40 20 20

  17. 80 74 KAC-ft 60 Volume 45 40 20 20

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