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Integrating tools to scope coordinated reservoir-floodplain management for climate resilience

Integrating tools to scope coordinated reservoir-floodplain management for climate resilience Jeff Opperman and Andy Warner, The Nature Conservancy. Annual flood damages in U.S. (1903 – 2011). Source: NOAA. Competition in multipurpose reservoirs. Flood control.

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Integrating tools to scope coordinated reservoir-floodplain management for climate resilience

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  1. Integrating tools to scope coordinated reservoir-floodplain management for climate resilience Jeff Opperman and Andy Warner, The Nature Conservancy

  2. Annual flood damages in U.S. (1903 – 2011) Source: NOAA

  3. Competition in multipurpose reservoirs Flood control

  4. The value of connected floodplains

  5. Status quo operation – flood pool empty

  6. Status quo operation – flood pool in use during flood

  7. Status quo operation – vulnerable to drought

  8. “new” water Reallocation of flood pool to other uses

  9. Reallocation – modeled increase in flood risk

  10. $ Reallocation – investments in flood-risk reduction

  11. $ Reallocation – investments in flood-risk reduction

  12. Flood pool % current: 100, 75, 50, 25, 0 Bulletin 17B flood frequency analysis using HEC-SSP; period of record hydrology Inflows Reservoir operations with HEC-ResSim (scenarios of reducing flood storage) Hydropower revenue Water supply Recreation Ability to provide environmental flows Flood hydrology Inundation patterns: HEC-GeoRas Flood damages: HAZUS Model components

  13. Study Sites Mokelumne River Savannah River

  14. Savannah River Reservoir Reallocation and Floodplain Management

  15. Savannah River Reservoir Reallocation and Floodplain Management

  16. Savannah River Reservoir Reallocation and Floodplain Management

  17. Savannah River Reservoir Reallocation and Floodplain Management

  18. Savannah River Reservoir Reallocation and Floodplain Management

  19. Savannah River Reservoir Reallocation and Floodplain Management

  20. Mokelumne River Reservoir Reallocation and Floodplain Management

  21. Reoperation = reservoir can provide spring e-flows for salmon 4x more often Reared in river habitat Reared in floodplain habitat

  22. Hydrology with climate change Flood pool % current: 100, 75, 50, 25, 0 Bulletin 17B flood frequency analysis using HEC-SSP; period of record hydrology Inflows Reservoir operations with HEC-ResSim (scenarios of reducing flood storage) Hydropower revenue Water supply Recreation Ability to provide environmental flows Flood hydrology Inundation patterns: HEC-GeoRas Floodplain values Flood damages: HAZUS Potential additional model components

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