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Parameterization Issues

Parameterization Issues. HRU Delineation Hillslope/Drainage Focus Subbasins Cascade HRUs (surface, gw) Water Bodies Parameter Types/Classes Topographic Non-topographic Parameter Complexity Single Factor Multiple Factor Visible/Modifible Estimation Methods Output File Structure.

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Parameterization Issues

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  1. Parameterization Issues

  2. HRU Delineation • Hillslope/Drainage Focus • Subbasins • Cascade HRUs (surface, gw) • Water Bodies • Parameter Types/Classes • Topographic • Non-topographic • Parameter Complexity • Single Factor • Multiple Factor • Visible/Modifible Estimation Methods • Output File Structure Parameterization Issues

  3. Distribution, Flow, and Interaction of Water

  4. HYDROLOGIC RESPONSE UNITS (HRUs)

  5. Distributed Parameter Approach Hydrologic Response Units - HRUs HRU Delineation Based on: - Slope - Aspect - Elevation - Vegetation - Soil - Precip Distribution

  6. HRUs

  7. Dill Basin, Germany Topography 750 km2 Sub-basins Land Use

  8. PRMS -- HRU Delineation Pixelated Topographic

  9. 3rd HRU DIMENSION

  10. HRU resolution PRMS SSR resolution GWR resolution

  11. Cascading Flow

  12. CASCADING FLOW PLANES 1 2 3 1 7 8 Overland Flow Path 10 9 1 Channel Segment 3 Channel Junction 4 3 6 2 Overland Flow Plane 2 4 width Grass/Agriculture Bare Ground/Rock 5 12 11 Trees length Shrubs

  13. Water Bodies

  14. MODEL RECIPE FILE PARAMETER ESTIMATION METHOD PARAMETER

  15. Topographic Parameters

  16. Non-Topographic Parameters

  17. Single Factor Parameter (HRU Elevation) = f( , )

  18. Multiple Factor Parameter (available water holding capacity of soil zone) Recharge Zone soil_moist_max Lower Zone • Function of: • Vegetation Type • Vegetation Rooting Depth • Soil Field Capacity • Soil Wilting Point

  19. DIGITAL DATABASES STATSGO Soils (USDA) Vegetation Type (USFS) Satellite SW Radiation (U Md) Vegetation Density (USFS) Land Use-Land Cover (USGS) Monthly PET

  20. AUTOMATED PARAMETER ESTIMATION USING THE GIS WEASEL

  21. GIS WEASEL • Parameterization: • 200+ methods available • Easily add custom methods • Exploit many types of data • Produce maps and ASCII files of parameters • Configure recipes • Apply to feature maps +

  22. User Created Parameter Methods

  23. Visible/Modifible Estimation Methods (conceptual) Map Window Project Browser HRU 15 Selected Click to display method Equation Box – Edit Method Data Table Filters Parameter Table

  24. Parameter Table Format

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