WikiWatershed is a web toolkit designed to help citizens, conservation practitioners, municipal decision-makers, researchers, educators, and students advance knowledge and stewardship of fresh water. WikiWatershed an initiative of Stroud Water Research Center, a global leader in freshwater science.

4. Software Downloads

Last updated on 2022-12-01

Please note: Model My Watershed’s Watershed Multi-Year Model is now the primary framework for running the latest GWLF-E model version. It has replaced MapShed and BASINS because those desktop applications were built on the aging MapWindow GIS package that is no longer supported. If you have questions beyond what is provided in this documentation, please contact us so that we can connect you with MapShed developer Barry Evans, Ph.D.

Alternatively, you can run the latest version in Model My Watershed.

*Note: Some download links point to files on Google Drive. If your firewall prevents access to Google Drive, please email for assistance.

4.1 MapWindow Application

MapWindow is the primary software required in order to run MapShed. Note: since MapShed is a plugin designed to work within MapWindow, you must install MapWindow prior to installing MapShed. Only the version provided on this site will work with MapShed.

4.2 MapShed Application

Contains the plugin files which provide the link between GWLF and MapWindow. Note: you must install MapWindow prior to installing MapShed.

4.3 GWLF-E Application

This is the standalone GWLF-E application. Note: This application is included with the MapShed download. Only download this application if you are NOT using the MapShed software. This application is a simple executable that can be run immediately after downloading it. There is no installer.

  • Download GWLF-E
    Download size: 2.95 MB | Disk space required: 2.95 MB | Version number: 1.5.1 | Date last modified: December 19, 2016
  • Download the original GWLF manual
    Download size: 2.32 MB | Version number: 2.0.0 | Date created: December 15, 1992

Important: If you are receiving Microsoft-related errors while attempting to run this executable, you are missing required Microsoft components. These components are included with the MapShed installation package. If you wish to only run the standalone executable, you must install both MapWindow and MapShed and then uninstall MapShed and then MapWindow. The required Microsoft components will remain installed.

4.4 Maintenance Downloads

MSICleaner is a generic application that is applied to all applications created by the Penn State Institutes of Energy and the Environment (PSIEE). It removes old, uninstalled PSIEE application installers.

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