Zero Discharge Stormwater Management (or Development Expediency Meets Sustainable Development)
This chapter presents the stormwater management system for a major development area in Calgary. The stormwater management system is a zero discharge system incorporating sedimentation, biological uptake/treatment and irrigation for disposal of stormwater runoff. The system has been designed, implemented and is in successful operation. The zero discharge stormwater system allowed the development area to proceed without off-site storm services, advancing development by some ten years, and controls/mitigates the effects of stormwater runoff on receiving waters.
New analytical techniques were required to assess the operation of the stormwater system because traditional design storm based methodologies are inadequate for assessing the combined inflow, storage and disposal processes. Continuous simulation, using long-term records of precipitation, temperature, and evaporation combined with estimates of plant moisture requirements formed the basis for the design of the stormwater management system.
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