For more information on the advanced processing options see the
documentation
Flowpaths
Flowpaths can be ran to build a flowpath loss grid.
Hourly Seepage
Computes hourly instead of daily seepage calculations.
Only applies to projects with 7778 soils (Not WEPP-PEP).
PMET
Computes evaporation and transpiration (ET) based on Penman-Monteith’s equation.
The default is Penman’s equation.
For guidance on the parameters please see:
https://www.fao.org/3/x0490e/x0490e00.htm
Frost
Adjustment of effective hydraulic and thermal conductivity for snow, frozen-residue, and frozen-soil.
Run Frost (frost.txt)
Snow
Adjustments for snow.
Baseflow Processing
Baseflow is not implemented for single storm climates. #312
Watershed
Clip Hillslopes
WEPP can overpredict erosion with long hillslopes.
Clipping will restrict the length and maintain area by increasing the width of the hillslope.
Channel Parameters
Constant CS parameters
Manning Roughness Coefficient
WEPP is more sensitive to chnn. chnn must be greater than chnnbr for WEPP.
Refer to this table for setting total Manning roughness (chnn) https://www.fsl.orst.edu/geowater/FX3/help/8_Hydraulic_Reference/Mannings_n_Tables.htm
Variable CS Parameters
Download the Channel Critical Shear Calculation Spreadsheet
Bedrock
Soils
Clip Soils
Deep soils may lead to excessive water being ended up stored in soils and limited runoff.
Initial Soil Saturation
Phosphorus Processing
Phosphorus coefficients determined by lt mod
Select WEPP Version
Export Configuration
Specify Export Products on Run Completion