Runoff Management Models

SLAMM and P8

This section of the Wisconsin DNR Runoff Management web site is intended for use by highly technical professionals.

The following links are to the U.S.G.S. Water Resources Division - Wisconsin District Office for SLAMM (Source Loading and Management Model) and P-8 (Program for Predicting Polluting Particle Passage thru Pits, Puddles, & Ponds). Both SLAMM and P-8 can be used to predict pollutant loads and demonstrate compliance with the requirements stipulated in NR151 for urban areas.

• Download the SLAMM model [exit DNR].
• Download SLAMM parameter files [exit DNR] required for running SLAMM in Wisconsin.
• P8 Urban Catchment Model model and information [exit DNR]
• Download P8 Climate Files for Wisconsin [ZIP 286 KB]

Regarding the use of WinTR-55 in Wisconsin.

• The program has been released by NRCS at a national level however, Wisconsin NRCS does not recommend its use in Wisconsin at the present time.
• There are several components of the model that need to be calibrated for Wisconsin. Initial calculations indicate that the WinTR-55 program will significantly overestimate peak discharge values and that its hydraulic calculations for outlet pipes are inaccurate.
• Until calibration is performed, you should use the previous version (2.1) of TR-55 or TR-20.
• Questions should be directed to Annette Humpal, NRCS Hydraulic Engineer at 920-773-1575 ext. 119.
• Please pass this message along to partner agencies, municipalities, and private engineering firms as appropriate.

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