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Extra Slides. Spatially averaged subbasins ; e.g., HEC-HMS. Randomness?. Spatial variation?. Time variation?. Flow not varying with time. Flow varying with time. Chow et al (1988). Differences Between 1, 2 and 3D Models.

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  1. Extra Slides

  2. Spatially averaged subbasins; e.g., HEC-HMS Randomness? Spatial variation? Time variation? Flow not varying with time Flow varying with time Chow et al (1988)

  3. Differences Between 1, 2 and 3D Models NCHRP-106, 24-24, Criteria for Selecting Hydraulic Models, December 2006

  4. FROA Ph. 1 - Constraints /Opportunities Land Cover Conserved Areas Infrastructure Restoration Opportunities

  5. Step 8 – Assess Floodplain Levee Conveyance and Storage • Qualitatively assess (i.e., without numerical modeling) combined effects of floodway lowering and setback levee areas to answer question “How far should levees be setback?” • Assess setback levee distances required to optimize channel-floodplain storage. • Assess benefits of non-uniform floodplain levee storage by maintaining/modifying existing levees and/or creative floodway vegetation plantings. • Assess potential for fish stranding after flood events in lowered floodway areas. • Assess creative solutions to maintain land uses while increasing flood protection.

  6. Estimate Setback Levee Width to Optimize Floodplain Storage • Total discharge through a leveed channel section is • Or in current terms, Q=Wc*C*(S^0.5)*[(D^1.5)+(W/Wc-1)*(D-Dc)^1.5] • If Q remains the same between existing and setback levee conditions, then Q = Qe = Qs and, • Ws = 1+Wc*((((De^1.5)+(((We/Wc)-1)*((De-Dc)^1.5))-((Ds/De)*De)^1.5)))/((Ds/De)*De)-Dc)^1.5)

  7. Additional Design Concepts • Natural levee emulation • Non-uniform floodplain levee storage • Strategic flow resistance schemes • Levee modifications

  8. Differences Between 1, 2 and 3D Models NCHRP-106, 24-24, Criteria for Selecting Hydraulic Models, December 2006 CWEMF – April 2013

  9. Differences Between 1, 2 and 3D Models NCHRP-106, 24-24, Criteria for Selecting Hydraulic Models, December 2006 CWEMF – April 2013

  10. Depth-Varying Roughness

  11. Ecohydrology – Ecologically Significant Flood HEC EFM • Season (timing) • Duration • Frequency USACOE HEC, 2009 Floodplain Management Association - 2012

  12. Model Calibration CWEMF – April 2013

  13. Haile (2005)

  14. http://blog.arborday.org/using-trees-and-shrubs-to-reduce-noise/http://blog.arborday.org/using-trees-and-shrubs-to-reduce-noise/

  15. Habitat Suitability Modeling • Yuba River • ~2000 cfs • Steelhead Fry • Depth • Cover • CombinedSuitability • Velocity • Adjacent Velocity • USFWS, 2010 Floodplain Management Association - 2012

  16. Integrated Flow-Bioenergetics Modeling Lee Harrison (NOAA and UC-Santa Barbara) with collaborators Tom Dunne (UC-Santa Barbara), Andy Hafs (UC-Santa Barbara) and Ryan Utz (NEON, Boulder, CO) Floodplain Management Association - 2012

  17. Integrated Flow-Bioenergetics Modeling Predicted salmonid growth (t = 100d) Lee Harrison (NOAA and UC-Santa Barbara) with collaborators Tom Dunne (UC-Santa Barbara), Andy Hafs (UC-Santa Barbara) and Ryan Utz (NEON, Boulder, CO) Floodplain Management Association - 2012

  18. Composite Roughness McKay and Fischenich (2011)

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