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Rocky Mountain Research Station
Forestry Sciences Laboratory - Moscow, Idaho
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Soil & Water
Engineering Software:

Road Erosion
Fire Effects
Disturbed Forests
Slope Stability
Erosion Modeling
Climate Modeling

Project Leader:
William J. Elliot
email Bill

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Soil and Water Engineering  >  Modeling Software   >  WEPP Forest Files

WEPP data files have been developed by Forest Service scientists and engineers to model some typical forest conditions. These files are part of a growing database of information to assist users in running WEPP for forest conditions.

The WEPP Forest Files work only with the DOS version of WEPP. We are in the process of making a set that will work under the Windows version of WEPP.

The objective is to provide forest environment input data in template format. We have provided seven forest profiles that describe both roads and harvest areas in the forest. The road files are for insloped roads, outsloped roads, insloped roads with a sediment plume, and rutted roads.

The harvest area scenarios are for a 100-year forest regeneration sequence, a forest with a burn in year two, and a forest skid trail with a skid operation in year two.

These files are based on the cropland format. Although cropland is an "agricultural" format, this format was used instead of the rangeland format because cropland allows for "tillage" operations which are necessary to describe blading or traffic on roads, skidding in forests, and other operations that mechanically disturb the soil.

Download the following files to your PC (onto a floppy disk or into your favorite WEPP directory):

floppy icon pub. icon

pdf WEPP forest files draft documentation ["WEPP Forest Applications;" 14-page 378K PDF file]
WEPP forest files archive [125 kilobyte executable self-extracting ZIP file]


  • In Windows 95 and Windows 3.x:
    1. Select Start on the taskbar (W95) or File in Program Manager (W3.x)
    2. Select Run...
    3. Browse to find and open the forest.exe file you downloaded, and press OK
    4. When asked for an "unzip-to" folder name, enter the name of the root directory for the drive in which WEPP is installed. The default is c:\.
  • or, in DOS:
    1. Move to the root directory of the drive in which WEPP is (or will be) installed, and type the full path and file name of forest.exe. For example, enter c:\wepp\util\forest.exe

Forest will copy a number of data files into the WEPP input data directories.