Abstract

A flood control study was carried out on a combined sewer area in the City of Ottawa. The study involved the development of detailed hydrologic and hydraulic models, using state-of-the-art GIS and stormwater management system simulation tools. Exploiting the limited opportunities provided by a highly urbanized environment and taking advantage of the urban infrastructure renewal program, the solution involves a significant volume of distributed in-line storage, sewer and major system diversions, inlet restriction, and temporary storage in two parks. Understanding the existing surface drainage patterns, site constraints and opportunities was a key component to creating efficient flood relief alternatives.

This chapter presents the model development of the existing combined sewer system and the approach used in developing a flood control solution.

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