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Model Overview

Model Overview. Application of CALSIM II to Friant System. CALSIM Development for USJRBI, Phase I Incorporate Real-time Operational Decision Logic for Operation of Millerton Lake. Water supply allocation based on available water supply

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Model Overview

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  1. Model Overview Application of CALSIM II to Friant System

  2. CALSIM Development for USJRBI, Phase IIncorporate Real-time Operational Decision Logic for Operation of Millerton Lake • Water supply allocation based on available water supply • Class 1, Class 2, and 215 water allocation made in March and updated monthly through end of June • Monthly use of Class 1 and Class 2 are dynamic based on availability of Class 2 and 215 water • Flood operation based on seasonal runoff • Water supply forecast used in February and updated monthly through end of June to target filling Millerton by end of June • Pre-release for snowmelt runoff are made each month from February through May

  3. Water Supply Allocation Procedure Annual Water Supply Forecast Annual Class 1 Allocation Annual Class 2 Allocation Annual Delivery Monthly Delivery Pattern Initial Monthly Delivery Forecasted Snowmelt Release Monthly Delivery Adjustment Monthly Delivery 215 Water Allocation Rain Flood Release

  4. Model Validation • Compare Model Simulation to Historical Operation • Findings: • Model adequately mimics historical operation • Model simulation provides “benchmark” for comparative analysis

  5. Model Validation Plots Annual Total Canal Delivery Annual Madera Canal Delivery Annual Friant-Kern Canal Delivery 1952-1961 Monthly Millerton Operation 1952-1961 Monthly Canal Diversions 1962-1971 Monthly Millerton Operation 1962-1971 Monthly Canal Diversions 1972-1981 Monthly Millerton Operation 1972-1981 Monthly Canal Diversions 1982-1991 Monthly Millerton Operation 1982-1991 Monthly Canal Diversions 1992-1994 Monthly Millerton Operation 1992-1994 Monthly Canal Diversions

  6. Conclusion • Model adequately mimics historical operation • Model simulation provides “benchmark” for comparative analysis

  7. End

  8. Annual Total Canal Delivery Most differences are explainable

  9. Annual Madera Canal Delivery

  10. Annual Friant-Kern Canal Delivery

  11. Rerouted Flood Flow to Madera Canal – Fresno River

  12. 1952-1961 Monthly Millerton Operation

  13. 1952-1961 Monthly Canal Diversions

  14. 1962-1971 Monthly Millerton Operation

  15. 1962-1971 Monthly Canal Diversions

  16. 1972-1981 Monthly Millerton Operation

  17. 1972-1981 Monthly Canal Diversions

  18. 1982-1991 Monthly Millerton Operation

  19. 1982-1991 Monthly Canal Diversions

  20. 1992-1994 Monthly Millerton Operation

  21. 1992-1994 Monthly Canal Diversions

  22. Annual Water Supply Forecast • Water Supply Volume Available for Delivery = + Beginning of Month Storage + Inflow (through September) - Canal Loss (through September) - Minimum River Release (through September) - Evaporation Estimate (through September) - Carryover Target (end of September) • Updated Monthly From March Through June

  23. Annual Class 1 Allocation Minimum of • Water Supply Volume Available for Delivery • 800,000 AF • Updated Monthly From March Through June

  24. Annual Class 2 Allocation Minimum of • Water Supply Volume Available for Delivery Minus • Class 1 Allocation • Spill forecast • 1,400,000 AF • Updated Monthly From March Through June for Spills • Adjusted for Wetness in Tulare Basin

  25. Monthly Delivery Pattern • Patterns are developed based on deliveries from 1982-1997 • 4 Sets of Monthly Patterns • Total Friant-Kern Canal • Friant-Kern Canal Class 1 • Total Madera Canal • Madera Canal Class 1 • CALSIM uses annual delivery allocation to select pattern • Class 2 Pattern is the Difference Between Total and Class 1

  26. Historical Total Delivery Pattern

  27. Historical Class 1 Delivery Pattern

  28. Total Delivery Patterns

  29. Class 1 Delivery Patterns

  30. Snowmelt Release Forecast • Volume of Friant release, above Class 1 and Class 2, to be made with the target of filling by the end of June • Spill volume is spread throughout spring, the pattern of release is based on spill volume • Updated Monthly From February Through June • Snowmelt Release Volume = + March 1 Storage + Inflow (through June) - Canal Loss (through June) - Minimum River Release (through June) - Evaporation Estimate (through June) - Maximum Millerton capacity - Canal Delivery

  31. Delivery Adjustment • Friant-Kern Canal Class 2 delivery is reduced based on Tulare Basin wetness • Natural Flow of Tule River is used as wetness indicator • Madera Canal delivery is reduced based on Madera Canal service area demands

  32. 215 Water Allocation • Allocation is made only when Friant will spill for Rain flood or pre-release for snowmelt • 215 water will not be allocated when delivery is reduced due to basin wetness • 215 demand is 1,200 cfs for Friant-Kern Canal • 215 demand is 100 cfs for Madera Canal

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