Watershed Modeling
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Documentation of previous PRMS versions

Leavesley, G.H., Lichty, R.W., Troutman, B.M., and Saindon, L.G., 1983, Precipitation-runoff modeling system-User's manual: U.S. Geological Survey Water-Resources Investigations Report 83-4238, 207 p.

Leavesley, G.H., Restrepo, P.J., Markstrom, S.L., Dixon, M., and Stannard, L.G., 1996, The Modular Modeling System (MMS): User's manual: U.S. Geological Survey Open-File Report 96-151, 142 p.

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Precipitation Runoff Modeling System (PRMS)

The Precipitation-Runoff Modeling System is a deterministic, distributed-parameter, physical process based modeling system developed to evaluate the response of various combinations of climate and land use on streamflow and general watershed hydrology.

Download Software (Current Version 4.0.3, June 19, 2017)
Previous Versions

PRMS 4.0.2 (released August 17, 2016)
PRMS 4.0.1 (released March 15, 2015)
PRMS 4.0.0 (released March 15, 2015)
PRMS 3.0.5 (released April 24, 2013)
PRMS 3.0.4 (released January 15, 2013)
PRMS 3.0.3 was never publicly released

PRMS 3.0.2 (released September 29. 2012)
PRMS 3.0.1 (released February 6, 2012)
PRMS 3.0.0 (released November 15, 2011)

Support is provided for correcting bugs and clarification of how the code is intended to work. Only limited assistance can be provided for applying PRMS in specific studies.

Before contacting us for support, please:

  1.     Make sure that you have downloaded the most current version of PRMS (available above).
  2.     Run the model in "command line mode" (see the example problems included in the download on how to do this) and correct any issues that are identified by either error or warning messages.
  3.     If you were unable to get rid of any messages, capture (screen grabs are best) them in their entirety.
  4.     Describe the action that seems to have triggered the problem (ie "started crashing when I try to load a new data file").
For support, fill out the MOWS contact form.


The structure, input and output files, and most of the hydrological process modules are documented in by Markstrom and others (2015):

Markstrom, S.L., Regan, R.S., Hay, L.E., Viger, R.J., Webb, R.M.T., Payn, R.A., and LaFontaine, J.H., 2015, PRMS-IV, the precipitation-runoff modeling system, version 4: U.S. Geological Survey Techniques and Methods, book 6, chap. B7, 158 p., http://dx.doi.org/10.3133/tm6B7.