Regional Watershed Spreadsheet Model (RWSM) Year 5 Progress Report

A series of reports on findings from the RMP Small Tributaries Loading Strategy (STLS) is now available.  The STLS provides information that supports the implementation of the Municipal Regional Stormwater Permit (MRP).  STLS studies conducted during the first term of the MRP (2009-2015) were summarized in a synthesis report.  The primary emphasis of these studies was to define baseline concentrations and loads in six watersheds and to refine estimates of overall loads to the Bay by developing and using a GIS-based regional watershed “spreadsheet” model.

The Regional Watershed Spreadsheet Model (RWSM) was developed to estimate average annual regional and sub-regional scale loads for the San Francisco Bay Area. It is part of a class of deterministic empirical models based on the volume-concentration method.