Abstract

Abstract A cascading network of decentralized detention-based green/gray infrastructure (DBGI) is demonstrated as a viable alternative to mitigate combined sewer overflows (CSO). DBGIs are strategically placed throughout a sewershed to intercept, temporarily detain, and release rainfall-runoff during and after a storm event. The captured stormwater is released into the existing collection system. The proposed operating plan is “ s ynchronized i nhale t hen e xhale s trategy” (SITES) where all DBGI fill and empty in unison. A unique desktop framework is developed to demonstrate the concept. Simulation runs show that the DBGI operated with SITES brings the sewershed into compliance with the USEPA CSO control policy.

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