Map

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Subcatchment Colormapping

Select a channel or hillslope to view information
Modify Landuse

Rebuild the soils after changing landuse.

WEPP Results

Hillslope Visualizations

     



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Gridded Visualizations (for flowpath runs)



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Channel Delineation

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Outlet

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Subcatchments Delineation

Advanced Options
no advanced options currently available
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Landuse Options

Upload a raster Landuse Map (.img or .tif). The map should be a thematic map with values cooresponding to the selected management map

See here for management mapping definitions

Advanced Options
no advanced options currently available
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Soil Options

Hillslopes with burn severity landuses will have soils altered to model burn severity.

Advanced Options
Use internal hydraulic conductivity adjustments (ksflag)

Should be off 7778. Does not affect 9001 and 9002 soils. (Experimental use for Agriculture Only.)



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Climate Options

User Defined

Spatial Mode


Select Station

Filter
View PAR

Climate Method










NEXRAD Daily Modified Dataset




Spatial Mode



Stochastic Climate Generation
Observed Years
Future (CMIP5)
Single Storm (Cligen)
Single Storm Batch (Cligen)

Specify single storms as separate rows: mo da yr prcp(in) duration(hours) time-to-peak(%) intensity(in/hour)

Advanced Options
Use GRIDMET Wind when Applicable
Post CLIGEN Precipitation Scaling





Scalar Scaling
Monthly Scaling
Reference Scaling
Spatial Scaling
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Watershed Preparation Report

WEPP

Advanced Options
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





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Partitioned DSS Export for HEC

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Observed Data Model Fit

Enter Observed Timeseries
Text should contain the following column headers matching totalwatsed e.g.:
  • Streamflow (mm)
  • Sed Del (kg)
  • Total P (kg)
  • Soluble Reactive P (kg)
  • Particulate P (kg)
Header and data values should be delimited by commas
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Export