Combined Sewer Overflow Abatement Planning Based on SWMM EXTRAN Modeling

by David M. Wood,
David Crawford,



Document Type: Proceeding Paper

Part of: Water Management in the '90s: A Time for Innovation

Abstract: This paper discusses use of the Storm Water Management Model (SWMM), with the EXTRAN block as the hydraulic transport mechanism, as a tool for developing a facilities plan for abating the impacts of 42 combined sewer overflows (CSOs) in Portland, Marine. The authors' strategy involved developing and calibrating a combined sewer model for assessing the system, planning and implementing a flow monitoring program, and using the results of the monitoring program to revise and enhance the final model. A description of modeling strategies adopted and insights gained from using SWMM and EXTRAN are presented.

Subject Headings: Hydraulic models | Mathematical models | Runoff | Combined sewers | Overflow | Storm sewers | Stormwater management | Water management

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