Western Washington Hydrology Model
VERSION 3.0

Access to Version 2.0

For information on training classes on WWHM3 please contact Erica Peterson at AGC Education Foundation at 206-812-0806. You may also go to their website and navigate to find and register for WWHM training classes currently available.

Follow the 2 steps below to install WWHM3:

(1) Double click on WWHM3.msi to install the program in C:\ drive under sub-folder "C:\Program Files\WWHM3", and

(2) Double click on the “allmaps.exe” to install all county maps in western Washington in C:\ drive under sub-folder "C:\Program Files\WWHM3\allmaps".

wwhm3.msi (September 22, 2008)
NOTE: Do not save the download in C:\Program Files\WWHM3 folder

allmaps_ww.msi (September 22, 2008) to be downloaded and installed for use with WWHM3.msi
NOTE: Do not save the download in C:\Program Files\WWHM3 folder

If you need help, refer to the WWHM3 User Manual. For more information about the high groundwater module used by program read WWHM3 High Groundwater Parameters. These downloads require Adobe Acrobat Reader to view: If you do not have the free Acrobat Reader installed you may download it from this site.

WHAT’S NEW IN WWHM3

WWHM3 gives the user greater modeling flexibility and options. Version 2 was limited to drainages of less than half a square mile (320 acres) because of the lack of a conveyance feature (natural channel or pipe). This limitation does not apply to WWHM3; with Version 3 the user can model entire watersheds of unlimited size as long as they are contained within a single county or use the time series element to transfer flows from one county to an adjacent county.

Specific changes and additions in Version 3 include:

Icons are now called elements in the Schematic screen.
There are separate elements for trapezoidal ponds, irregular ponds, tanks, and vaults.
Basin land use categories now include land slopes (flat, moderate, and steep).
Landscape vegetation is now called lawn.
Runoff credits have been replaced with specific categories to disperse roof runoff to lawn, etc.
Standard residential has been removed, although the user can still explicitly input the standard residential assumptions.
Two lateral basins (pervious and impervious) have been added. Flow can go directly from a lateral basin to another basin without a connecting conveyance system.
A flow splitter now offers greater flexibility in deciding how to separate the flow.
The open channel conveyance element has been added.
Gravel trench beds have been added.
Wet ponds have been added. Wet ponds can be used to model wetlands and areas influenced by high groundwater.
There is no longer a Point of Compliance icon (or element). The user can specify a point of compliance at any element by right clicking on that element and selecting “Point of Compliance”. There can be multiple points of compliance. The model keeps track of each one.
There is no longer an Extender icon (or element). The user now explicitly links one element to another.
“Preferences” has been replaced by View, Options and a criteria checker has been added.
View/Export Time Series has been moved into Tools and additional options have been added.

Western Washington Hydrology Model VERSION 3.0

WHAT’S NEW IN WWHM3

Western Washington Hydrology Model
VERSION 3.0