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Western Washington Continuous Simulation Hydrology
Model (WWHM) > WWHM3
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 steps below to install WWHM3 (This program is
not compatible with Windows 7, 64 bit version)
- Download “WWHM3.msi” file.
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.
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)
- Open each file -Double click. 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>.
- wwhm3.msi (May 20, 2011)
- allmaps_ww.msi (May 20,
2011) (Western Washington County maps in to
be downloaded and installed for use with WWHM3.msi)
Instructions for projects in Clark County only
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:
http://www.clark.wa.gov/water-resources/documents-manuals.html
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.
Copyright © Washington State Department of Ecology. See http://www.ecy.wa.gov/copyright.html.
