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The Water Erosion Prediction Project (WEPP) model is a process-based, distributed parameter, continuous simulation, erosion prediction model for use on personal computers running Windows 10 or Windows 11. The current model version (v2024.204) available for download is applicable to hillslope erosion processes (sheet and rill erosion), as well as simulation of the hydrologic and erosion processes on small watersheds. Included in the download package are WEPP model versions 2024.204 and 2012.8, WEPP Windows interface (September 2024), CLIGEN climate generators (versions 4.3 and 5.322), CLIGEN parameter files (1995 and 2015) documentation and example data.
Documentation
Overview of Soil Erosion
WEPP Model v2024 Release Notes
WEPP Model Documentation
WEPP Publications Bibliography List (1989-2024)
Agricultural Research magazine article on WEPP
WEPP Windows Frequently Asked Questions
WEPP Windows Interface Tutorial (PDF)
WEPP Windows Interface - creating slope inputs
WEPP Windows Interface - creating soil inputs
WEPP Windows Interface - creating management inputs
Using Tile Drainage with version 2012.8 (PDF)
Historic Background on Soil Conservation Research(PDF)
Water Erosion Prediction Project (WEPP) Model 2024 Status (PDF)
WEPP Windows Interface how-to videos
Downloads
Download WEPP for Windows (September 2024)
Previous versions of the model are also available from the download page.
Climate Input Processing
CLIGEN Information
WEPPCLIFF Process Observed Climate data for WEPP (2020)
Breakpoint Climate Generator (2016)
WEPP/SWAT Future Climate Generator
Cligen parameter files for about 2600 stations in the US are included in the install package.
Cligen PAR file format documentation is available here.
WEPP USLE Validation Projects
WEPP Hillslope Validation with USLE Plot data
This zip file contains WEPP hillslope USLE projects. Each subdirectory is a USLE plot location containing the input files for WEPP along with an observed event file.
.man - WEPP management file input
.sol - WEPP soil file input
.slp - WEPP slope file input
.cli - WEPP climate file input
.run - WEPP run file input
.eve - USLE plot observed events for soil loss and runoff
Summary output files are included that show WEPP predicted erosion and runoff values for model versions 2012 and 2024 compared to USLE observed data. To download the WEPP USLE validation data click here
Related Software
A WEPP browser application for NRCS using web services. Uses web services to obtain climate and SSURGO data and CRLMOD covering 25,000 managements. WEPP is run as a web service at Colorado State University
A Web browser GIS interface to the WEPP model (WEPPcloud). Run WEPP watershed simulations on University of Idaho servers for forest related applications.
A Web browser interface to WEPP model. Run WEPP simulations without having to download the software, simulations are run on servers at the NSERL.
Forest Service WEPP interfaces.The US Forest Service has developed specific web based interfaces for western forest and logging activities.
A standalone GIS interface for WEPP (GeoWEPP) is available as extensions for several GIS software packages that enables interested users to derive WEPP hillslope and watershed model input data sets, create scenarios, and visualize results based on commonly available (or custom-built) Digital Elevation Models (DEMs), soils, and/or landuse/land/cover data.
Comments or suggestions regarding WEPP: e-mail wepp@ecn.purdue.edu
