Ecology continues to support the use of WWHM3 for those who choose to continue to use it. It is up to the individual jurisdiction to determine which model they will use. Check with your jurisdiction to ensure that you are using an accepted model.
Follow the steps below to install WWHM3 (This program is not compatible with Windows 7, 64 bit version)
Download “WWHM3.msi” file. (January 23, 2013)
Please note: When downloading this file, save it on the desktop or in a folder on your PC other than <C:\Program Files\WWHM3> (This is the default folder for the installation step).
Download “allmaps_ww.msi” file. (January 23, 2013)
Please note: When downloading this file, save it on the desktop or in a folder on your PC other than <C:\Program Files\WWHM3> (This is the default folder for the installation step.)
Western Washington County maps is to be downloaded and installed for use with WWHM3.msi.
Double click each file to open it. This starts the installation process. Follow prompts to complete installation.
Please note: When installing, let the programs install in the default subfolder <C:\Program Files\WWHM3>.
Based on a recent model calibration effort, the soil groups and precipitation gages for Clark County in WWHM3 have changed. The new soil groups and precipitation data for Clark County can be accessed within WWHM3 when “Clark 2010” is selected in the “Map Information” screen.
WWHM users can still access the old (default) soil groups and precipitation-gage data for the county by selecting “Clark” in the “Map Information” screen. However, users must check with Clark County for instructions on which county map is acceptable for their project in the county.
For instructions on soil groups and other modeling requirements in Clark County, use the following link to the Clark County website: