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HRU Delineation and Parameterization for Hydrologic Modeling

Utilize distributed parameter approach for HRU delineation, considering slope, aspect, elevation, vegetation, and more. Derive HRU parameters like topography, land use, and vegetation using various methods for effective hydrological modeling.

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HRU Delineation and Parameterization for Hydrologic Modeling

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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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