A Microcomputer Model for Simulating Pressurized Flow in a Storm Sewer System

Report No: 89-R5

Published in 1988

About the report:

A study is being conducted on the development of a microcomputer model for simulating storm sewer flow under surcharged or pressurized conditions. Several existing models, including the EPA Storm Water Management Hodel (SYMM) and the Illinois Urban Drainage Simulation (ILLUDAS), have been reviewed. It was concluded that the SVMM program's EXTRAN subroutine, which uses a full dynamic wave approach, would be suitable for our purposes. Certain modifications of EXTRAN will be necessary, and the modified subroutine will be incorporated into the Federal Highway Administration's Pooled Fund Storm Sewer Program PFP-HYDRA.

Disclaimer Statement:The contents of this report reflect the views of the author(s), who is responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Virginia Department of Transportation, the Commonwealth Transportation Board, or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. Any inclusion of manufacturer names, trade names, or trademarks is for identification purposes only and is not to be considered an endorsement.


  • Shaw L. Yu, Yin Wu

Last updated: December 28, 2023

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