covden_win (nhru)

PRMS Parameter Name(s): covden_win

BAGIS-P Model Toolbox: bagis_p_vegetation_methods.tbx

BAGIS-P Model Name: Cov_Den_Win

Required DATABIN Layer(s):

• db_cover_type: Landfire_EVT

• db_cover_density: NLCD_TreeCover

Parameter Description: This model calculates winter vegetation density within AOI zones. Required inputs are a vegetation cover and zone grid. The vegetation is first reclassified to simplify the landcover - 0 = bare ground, 1 = grass, 2 = shrub, 3 = deciduous trees, 4 = coniferous trees. The weighted grid further distinguishes the forested areas from non-forested; bare ground = 0, grass = 15, shrub = 25, deciduous = 100, coniferous = 100. This output is adjusted be a winter weight; bare ground = 0, grass = 80, shrub = 70, deciduous = 60, coniferous = 100.

Methods:

• 1. Reclassify “db_cover_type” raster based on “COV_TYPE” value to create winter_weights raster (Bare Ground: 0 → 0; Grass: 1 → 80; Shrub: 2 → 70; Deciduous Trees: 3 → 60; Coniferous Trees: 4 → 100).

  2. Using Raster Calculator, multiply the floating point value of db_cover_density and winter_weights, then divide the output by 10000 (to convert % to decimal) to create cov_dens_winter_weighted raster.

  3. Calculate the MEAN of cov_dens_winter_weighted for each HRU using Zonal Statistics as Table.

  4. Set the output value as the parameter value.

BAGIS-P GUI Example: