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Application of SANMAN: A San Joaquin River Salinity Management Spreadsheet Model

SANMAN is a spreadsheet tool aiding in the development of a salinity management plan for San Joaquin River by identifying strategies and estimating costs. March 2005 presentation covers model details, study objectives, results, and conclusions.

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Application of SANMAN: A San Joaquin River Salinity Management Spreadsheet Model

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  1. Application of SANMAN:A San Joaquin River Salinity Management Spreadsheet Model CWEMF Annual Meeting March 2005

  2. Presentation Content • Model Description • Study Objective & Assumptions • Study Results & Conclusions

  3. Model Description The purpose of the San Joaquin River Salinity Management Model (SANMAN) is to provide reconnaissance-level decision support in the development of a San Joaquin River Salinity Management Plan by: • Identifying coordinated management strategies that meet the Vernalis salinity objective • Estimating water costs of strategies

  4. SANMAN Version 2.0 Schematic Actions 1,2 & 6 Actions 1,2,4 & 6 Actions 1 & 6 Action 7: HOR Barrier Operations Actions 2,3 & 6 Stanislaus River Tuolumne River Merced River Lander Ave. 639 637 636 630 620 614 Stockton Vernalis Maze Mud & SaltSloughs NewmanWasteway Actions 2 & 3 Action 1: Tributary Coordination Action 2: Drainage Reduction Action 3: Drainage Management Action 4: New Melones Re-operation Action 5: DMC Re-circulation Action 6: Purchases Action 7: Delta Water Quality Actions Action 5 418 Tracy P.P. Delta Mendota Canal Action 7: Franks Tract etc. Intertie or Exchange 419 Banks P.P.

  5. Presentation Content • Model Description • Study Objective & Assumptions • Study Results & Conclusions

  6. Study Objective • Explore the potential benefits of redistributing winter and early spring drainage releases from managed wetlands on the west side of the San Joaquin River basin • Assist in meeting Vernalis salinity objective • Reduce burden on New Melones Reservoir

  7. Study Assumptions • Consider an isolated action and an action coordinated with the SJRWQMG Draft Preferred Alternative (Scenario HP-20) • Partial implementation (20%) of SJRIP • “High priority” re-circulation • Relocation of Stanislaus R. dissolved oxygen compliance location • Strategic water transfers

  8. Study Assumptions (cont’d) • March 1 – April 14 drainage is retained for release April 1 – May 15 when: • New Melones dilution flow is required to meet March Vernalis salinity objective • San Joaquin River assimilative capacity is available

  9. Study Assumptions (cont’d) • March drainage is pre-released in February when: • New Melones dilution flow is required to meet March Vernalis salinity objective • San Joaquin River assimilative capacity is available and/or New Melones water is available for dilution

  10. Study Assumptions (cont’d) • Redistribution Priority for March Drainage: • April 1-14 • April 15-30 • May 1-15 • February • Redistribution Priority for April 1-14 Drainage: • April 15-30 • May 1-15

  11. Presentation Content • Model Description • Study Objective & Assumptions • Study Results & Conclusions

  12. Redistribution of March Drainage:Refuge Drainage Management

  13. Redistribution of March Drainage:Refuge Mgt + Draft PA (HP-20)

  14. Redistribution of April 1-14 Drainage:Refuge Drainage Management

  15. Redistribution of April 1-14 Drainage:Refuge Mgt + Draft PA (HP-20)

  16. Vernalis Salinity Objective • Refuge drainage management reduces Vernalis salinity objective violations from 13 to 5 over the 73-year simulation period • When coordinated with the SJRWQMG Draft PA, refuge drainage management always meets the Vernalis salinity objective over the 73-year simulation period without strategic water transfers

  17. New Melones Releases:Refuge Drainage Management

  18. New Melones Releases:SJRWQMG Draft PA (HP-20)

  19. New Melones Releases:Refuge Mgt + Draft PA (HP-20)

  20. Conclusions • Isolated action results in the following redistribution of March refuge drainage: • 7% in below normal years • 29% in dry years • 63% in critical years • Coordinated action results in a similar redistribution of March drainage

  21. Conclusions (cont’d) • Isolated action results in the following redistribution of April 1-14 refuge drainage: • 17% in below normal years • 24% in dry years • 27% in critical years • Coordinated action results in less redistribution of April 1-14 drainage

  22. Conclusions (cont’d) • Isolated action reduces salinity violations from 13 to 5 over 73-year period • Coordinated action eliminates need for strategic water transfers • Isolated action provides 10 TAF critical year savings in New Melones. Savings is slightly higher (12 TAF) with coordinated action. • Potential VAMP savings not quantified

  23. Extra Slides

  24. Model Description (cont’d) • Microsoft EXCEL • Post-analysis of CALSIM Sequential Hydrology and CVP-SWP Operations • March 1922 thru September 1994 • April - May: Half month time step • Prescribes Action Levels (e.g. re-circulation volume) Necessary to Meet Vernalis Salinity Objective Given Pre-defined Action Priorities

  25. Model Description (cont’d)Salinity Management Actions • Coordinated Tributary Operations • Drainage Reduction • Drainage Management • New Melones Releases • DMC Re-circulation & Delta Actions • Purchases Decreasing Action Priority

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