Abstract

Launching a series of sewer system inflow and infiltration (I/I) remediation projects, the City of Columbus, Ohio structured the project schedules so that the first I/I project would set the technical approach “cornerstone” of the projects to follow. In particular, it was important that the initial project develop a set of modeling tools and application approaches designed to streamline all the hydrologic and hydraulic (H/H) models and provide a consistent approach for the entire series of projects.

The first I/I project is known as the Livingston/James Sewer System I/I Remediation Project. To ensure consistency and compatibility, the City established PCSWMM as the platform for all the City’s I/I remediation projects. In developing the modeling approach for the first project, the City of Columbus, CDM Inc., and CHI worked together as a team to enhance and apply PCSWMM and the SWMM 4.4h computational engine to model the subject sewer system.

This chapter discusses the lessons learned and the solutions that the project team developed, including several SWMM code revisions and the development of new PCSWMM routines. Each of these solutions represents valuable developments potentially applicable to other PCSWMM modeling projects.

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