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Managing Stream Erosion & Restoration: Solutions for Sustainable Habitats

Learn about the impact of erosion on stream habitats, human-induced erosion causes, cost implications, and effective solutions such as reconfiguration and flow controls. Explore the importance of managing erosive forces for stream ecosystem health.

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Managing Stream Erosion & Restoration: Solutions for Sustainable Habitats

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  1. Stream Restoration and Erosive Forces in Streams Summary of Jan 2007 Consensus Presentation October 28, 2008

  2. Key Points • Natural Erosion Improves Habitat • Human Induced Erosion Degrades Habitat • Causes: Human Activities and Structures • Solutions: Reconfiguration + Flow Controls • Solutions: Case-by-Case

  3. Erosion is a significant problem

  4. Costs of Erosion • $3 million per year – Sediment Removal • $2 million per year – Bank Repairs Source: Clean Safe Creeks Reports

  5. Stream Zones Headwaters/Source Zone Transport Zone Depositional Zone (Miller 1990) (NRCS)

  6. Corridor Cross-Section Floodplain Bankfull Active Channel Low Flow Channel

  7. Upsetting the Delicate Balance:Impervious Surface Impacts 40% evapotranspiration 38% evapotranspiration 10% runoff 20% runoff 30% runoff 55% runoff (NRCS)

  8. Stream Hydrology Storm Hydrograph Pre – Post Urbanization (NRCS)

  9. Thompson Creek Feb. 2006 Near Aborn (Mar. 2006)

  10. River Science Solutions : • Reconfigure Channels • Moderate Stormwater Discharges from New Development • Moderate Stormwater Discharges from Existing Development

  11. Conclusion • No single solution • Reach by reach analysis • Prioritization

  12. END of Presentation

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