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PRMS-daily and Dimensions

PRMS-daily and Dimensions. one – watershed outline usually “basin” (ArcInfo GRID) has only one zone, which encloses entire area to be modeled. PRMS Daily Mode. nhru – number of hydrologic response units user-specified map name flexible delineation strategy

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PRMS-daily and Dimensions

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  1. PRMS-daily and Dimensions

  2. one – watershed outline • usually “basin” (ArcInfo GRID) • has only one zone, which encloses entire area to be modeled PRMS Daily Mode

  3. nhru – number of hydrologic response units • user-specified map name • flexible delineation strategy • Problem Set uses “hillslope” concept PRMS Daily Mode

  4. nradpl – number of radiation plane units • user-specified map name • provides model with information about • Slope • Aspect • Latitude PRMS Daily Mode

  5. nradpl: standard delineation method • Make nhru first • Reclassified slope • Reclassified aspect • Combine ( 2. and 3. ) • Find modal value of ( 4. ) for each zone in ( 1. ) PRMS Daily Mode

  6. nradpl: explanation • modal: most commonly occurring value • nradpl is really a map of categories • - like a soil-type map, for example • - each nradpl value reflects a slope/aspect pair • - this value may exist in other locations PRMS Daily Mode

  7. nssr: number of sub-surface reservoirs • Normally set to “1” in parameter file • not usually derived with GIS Weasel • Difficult to find GIS data about things below the surface • can use nhru map • Creates one sub-surface reservoir for each hydrologic response unit PRMS Daily Mode

  8. ngw: number of ground-water reservoirs • Normally set to “1” in parameter file • not usually derived with GIS Weasel • Difficult to find GIS data about things below the surface • can use nhru map • Creates one sub-surface reservoir for each hydrologic response unit PRMS Daily Mode

  9. establish AOI  dimension one • drainage network “fullpath” • contributing area >> two • ID # Manipulation  dimension nhru • radiation plane  dimension nradpl • Parameterize • prms-topographic, prms-non-topographic-kowaco PRMS Daily Mode Steps

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