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June 29, 2009

Placer County Water Agency Middle Fork American River Project AQ 4 – Temperature Modeling (Status Report). June 29, 2009. Outline. Modeling Progress: Middle Fork Below Ralston Rubicon River Revisit Ralston Reservoir Schedule. Middle Fork American River (MFAR) below Ralston: Geometry.

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June 29, 2009

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  1. Placer County Water AgencyMiddle Fork American River ProjectAQ 4 –Temperature Modeling(Status Report) June 29, 2009

  2. Outline • Modeling Progress: • Middle Fork Below Ralston • Rubicon River • Revisit Ralston Reservoir • Schedule

  3. Middle Fork American River (MFAR) below Ralston: Geometry Plan (UTM Coordinates) Profile (25 meter node spacing)

  4. MFAR below Ralston: Flow Mass Balance Foresthill R11 gage (855:857) 15 min converted to hourly ≈ 849:855 daily converted to hourly + 855 daily accretions converted to hourly + 847:855 Oxbow Powerhouse hourly (not greater than 980 cfs) + 845:855 daily converted to hourly Note: Operation Hydrology Model Mass Balance was left unbalanced if gage flow was greater or smaller than upstream inflows. In the case where the gage was higher than the upstream inflows and operational records show that Ralston Afterbay was spilling, then the inflow to the Foresthill gage was balanced with a commensurate amount of spill over Ralston Afterbay; otherwise, Mass Balance was left unbalanced.

  5. MFAR below Ralston: Habitat

  6. MFAR Below Ralston Dam MF5-RM24.6

  7. MFAR below Oxbow PH MF6-RM24.3

  8. MFAR MF7-RM23.1

  9. MFAR MF14-RM19.6

  10. MFAR MF15-RM14.3 (above Otter Cr)

  11. MFAR MF16-RM11.0 (above Canyon Cr)

  12. MFAR MF9-RM8.9

  13. MFAR MF8-RM0.1

  14. MFAR Below Ralston: Summary • Summary • Effective representation of flow conditions in peaking reach (i.e., water balance) • Most locations simulated temperature are representative, additional calibration required • In Progress • Extending Grid: extend geometry into Folsom Reservoir • Refine travel time • Refine temperature calibration with focus on lower river

  15. Outline • Modeling Progress: • Middle Fork Below Ralston • Rubicon River • Revisit Ralston Reservoir • Schedule

  16. Water temperature Rubicon River mile 28.8Upstream boundary

  17. Water temperature Rubicon River mile 25.3

  18. Water temperature Rubicon River mile 22.7

  19. Water temperature Rubicon River mile 22.5

  20. Water temperature Rubicon River mile 14.3

  21. Water temperature Rubicon River mile 5.3

  22. Water temperature Rubicon River mile 3.7

  23. Water temperature Rubicon River mile 0.7

  24. Rubicon River: Summary • Summary • Effective representation of flow conditions • Most locations simulated temperature are representative • In Progress • Refine travel time based on recent data • Refine temperature calibration accordingly

  25. Outline • Modeling Progress: • Middle Fork Below Ralston • Rubicon River • Revisit Ralston Reservoir • Schedule

  26. Ralston Reservoir Middle Fork American River Oxbow PH Ralston PH 1 Ralston Afterbay Rubicon River 1 Temperature Profile Location

  27. Ralston

  28. Ralston water levels, 2006

  29. Ralston water levels, 2007

  30. Ralston water temperature, 2006 July 06 Sep 30 Aug 08 1181 1164 1148 1132 1115 1181 1164 1148 1132 1115 1181 1164 1148 1132 1115 Elevation (ft) Elevation (ft) Elevation (ft) Tunnel Elevation Stream Maintenance Low Level Water temperature (oC) Water temperature (oC) Water temperature (oC)

  31. Ralston water temperature, 2007 July 31 Sep 25 July 11 June 07 Sep 06 1181 1164 1148 1132 1115 1181 1164 1148 1132 1115 1181 1164 1148 1132 1115 1181 1164 1148 1132 1115 1181 1164 1148 1132 1115 Elevation (ft) Elevation (m) Elevation (ft) Elevation (ft) Elevation (ft) Tunnel Elevation Stream Maintenance Low Level Water temperature (oC) Water temperature (oC) Water temperature (oC) Water temperature (oC) Water temperature (oC)

  32. Estimated Schedule • Draft calibration for all system elements (Target: July 1) • System-wide calibration and draft model documentation (Target: August 1) • System-wide calibration approach (revisited)

  33. Model Simulation: Approach 1 2 3 4 7 6 9 10 8 11 Reservoir: CE-QUAL-W2 River: RMA-2 and RMA-11 Tunnel: Tunnel Model 5

  34. Questions?

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