Quali-Continuous Simulation of CSOsby Michael J. Mulhare, Rhode Island Dep of Environmental, Management, Providence, RI, USA,
Raymond M. Wright, Rhode Island Dep of Environmental, Management, Providence, RI, USA,
Document Type: Proceeding Paper
Part of: Environmental Engineering
Providence, Rhode Island, has a combined sewer system. During and following a precipitation event the capacity of the system may be exceeded and a mixture of wastewater and urban runoff is discharged through 65 combined sewer overflows (CSOs) to the Providence River and its tributaries. These discharges degrade water quality and severely impair the uses of the Providence River system. The magnitude of the CSO problem is of such proportion that the use of advanced wastewater treatment at point sources would not significantly improve water quality or reduce the number of shellfishing closures. Recently a regional approach employing 2 or 3 larger facilities has been considered. Prior to implementation of this alternative the collection system as well as the drainage basins need to be modeled to predict the optimism utilization of the collection system and the subsequent pollutant load reduction to the receiving waters. The preliminary studies are described.
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