Where'd all that Stormwater go? Using Real Time Controls to Reduce CSOs

摘要

Kansas City, Missouri's Smart Sewers program is helping to lead the way in intelligent stormwater management by utilizing Continuous Monitoring and Adaptive Control (CMAC) for the existing Gardner Avenue detention facility. The 7,400 cubic meter (260,700 cubic ft or 1.95-million-gallon) dry detention pond with 26.3 hectares (65 acres) of contributing drainage was retrofitted with CMAC technology in early 2017. The CMAC software uses a control algorithm to continuously and autonomously modulate the discharge valve installed on the outlet structure based on the pond water level and the precipitation forecast. The objective for this installation is to increase the post-storm retention time thereby controlling release of stormwater runoff to an existing combined sewer system with limited capacity. In advance of wet weather, the actuated valve closes, capturing storm runoff in the pond. After a storm event, stormwater runoff is retained in the pond for a specified retention period, then gradually released during dry weather.