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The Function of Wood in Stream

The Function of Wood in Stream. Rosgen Pg 5-153. Before. After. Large Wood Stores Sediment and build Floodplains. Before. Stream Cross-Section. After. Large Wood in the Flood Plain. Potential Erosion. Live & Dead Wood = Energy Dissipation. Logjam. Back-Pressure. Flow.

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The Function of Wood in Stream

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  1. The Function of Wood in Stream Rosgen Pg 5-153

  2. Before After Large Wood Stores Sediment and build Floodplains

  3. Before Stream Cross-Section After

  4. Large Wood in the Flood Plain Potential Erosion Live & Dead Wood = Energy Dissipation

  5. Logjam Back-Pressure Flow Sediment Deposition

  6. Energy Dissipation Mean Width 1.5X Mean Width (Spreading)

  7. Natural Log Sill Flow Energy Dissipation (Drop) Sediment Storage

  8. Roughness Elements Point Bar Jam Bar Scour Wood Processing Pool Riffle

  9. Point Bar Building LWM Scour Energy Dissipation!

  10. Roughness Elements Terrace Building

  11. Back-Pressure Roughness Element Terrace Building

  12. Riparian Vegetation Bank stabilization LWD in Transition Roughness Elements Energy Dissipation

  13. Complexity Food Cover Biological Diversity

  14. Channel Narrowing

  15. Wood Processing Channel Narrowing Bank Building Energy Dissipation

  16. Identify Wood Functions in this Photo

  17. How about in this Photo?

  18. March 19, 2000 Logjam Constructed 1986 John Anderson & Mike Wisdom USBLM

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