P8 Urban Catchment Model

P8 Urban Catchment Model
by
William W. Walker, Jr., Ph.D.
for
USEPA, Minnesota PCA, & Wisconsin DNR
10/30/2007

Version Notes Installation Instructions Online Documentation P8 WebSite

This page appears each time you run P8 if you are connected to the Internet. Its purpose is to provide current information on model release and related matters.

Review Version Notes before installing. Install the latest version using the above link if the version number does not match the one you are currently using. If you have problems with installation, try manually uninstalling previous Windows versions via the Windows Control Panel before running the setup utility. The DOS version can remain on your system if desired.

The latest version supports input files from all previous versions. If your input files are stored in the default program directory for a previous version, they should be copied into the program directory for the new version. This can be done after installation.

P8 requires the Microsoft .Net Version 2.0 framework, which will be installed automatically when P8 is installed. P8 also requires Windows XP and Microsoft Excel 2003.

P8 has received limited testing with Windows VISTA and/or Excel 2007. In VISTA installations, the default program location specified in the setup procedure: "C:/Program Files/P8 Urban Catchment Model..." must be moved outside of the "/Program Files" directory, e.g. to "C:/P8/...". See installation instructions .

Version 1 (1990) documentation provides detailed descriptions of algorithms and calibrations. Updates are described in the documentation for the current windows version.

The Windows version basically translates the DOS version with more bells/whistles and revised input/output formats. Most of the underlying algorithms and calibrations (now 15-20 years old) have not been changed. As far as I know, mass is still conserved and suspended particles still settle at about the same rate as they did in the 1980's, so the underlying concepts and calibrations are still valid.

With the exception of street-sweeping efficiency factors, the default particle calibrations (NURP50, NURP90) based on information available as of 1990 have not been modified, users can create their own particle calibrations based on more recent and/or site-specific data. If the default calibrations are used, the user (not P8) assumes that they are valid.

Please send me an email if you download the program so that I can maintain a list of users. Likewise, please report problems or suggestions .

Bill

Email: bill@wwwalker.net

Home Page: http://www.wwwalker.net

http://www.wwwalker.net/p8/splash.htm 10/30/2007