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The Hydraulic Geometry Curve: A Tool For Assessing Agroforestry Options

The Hydraulic Geometry Curve: A Tool For Assessing Agroforestry Options . Joe Magner & Ken Brooks University of Minnesota. Cumulative Watershed Influences Function of : 1) Natural Phenomena & 2) Intensity of Land use Management. Silvopastoral Management?. Local Ground Water Seepage.

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The Hydraulic Geometry Curve: A Tool For Assessing Agroforestry Options

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  1. The Hydraulic Geometry Curve: A Tool For Assessing Agroforestry Options Joe Magner & Ken Brooks University of Minnesota

  2. Cumulative Watershed Influences Function of: 1) Natural Phenomena & 2) Intensity of Land use Management

  3. Silvopastoral Management? Local Ground Water Seepage

  4. Riparian Buffer Management?

  5. Could Woody Prevent This? Massive Bank Slump

  6. Channel Enlargement and loss of Near Bank Trees

  7. Systemic Upland Change in Runoff

  8. Systemic Change in Sediment Transport

  9. Clear need for Buffers – But Where? Engineered hydro-pathways

  10. Inside the Ditch Geometry

  11. Strategic Perenniality Swales & Oxbows

  12. Is the Channel Adjusting? Buffer Design Must Consider Channel Adjustment!

  13. Understanding Scale? What is the relationship between Channel Cross-sectional Area & Drainage Area?

  14. Regional Hydraulic Geometry Curve • Drainage Area VS Cross-Sectional Area • Regional Climate, • Terrain & Valley Type • Geologic Phenomenon – Soils, Bedrock, Lakes & Wetlands • Land Use Management and Associated Hydrologic Pathways, Examples:

  15. Rosgen “E” Type Channel Bankfull = Top of the Bank

  16. Rosgen “F” Type Channel Bankfull?

  17. Conclusions • Decision Tool for: Assessing Systemic Vs Local Channel Instability (Excess Runoff or Geotechnical) • Designing Woody Location in Riparian Buffers, and • Channel Restoration (Placement of Large Woody Debris)

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