Smart Water Symposium


394564 - Real-Time Water Quality in an Active Control Wet Pond

Monday, June 4
10:30 AM - 12:00 PM
Location: Lakeshore A
Co-Authors: Conor Lewellyn, Maryland – OptiRTC

Retention and detention ponds have historically been used throughout the country to control runoff for flood protection and, more recently, for water quality improvement. Communities often choose to retrofit these older ponds to meet today’s standards. A new approach, known as Continuous Monitoring and Adaptive Control (CMAC) has emerged as an alternative to traditional, passively controlled solutions. CMAC solutions integrate information directly from field deployed sensors with real-time weather forecast data (i.e., NOAA forecasts) to directly monitor performance and make automated and predictive control decisions to actively manage stormwater storage and flows.

This study evaluates water quality benefits of a CMAC technology deployed in a wet pond in Montgomery County, Maryland. The pond is inline on the Sligo Creek in the Anacostia River watershed, which is impaired for nutrients and sediment. The CMAC retrofit allows for release of water in the pond prior to a forecasted rainfall event, and increased retention time following a rain event. The increased retention time in the pond is hypothesized to increase particulate settling and allow for increased reduction of total suspended solids (TSS) and Nitrogen.

Real-time TSS and Nitrate sensors were deployed to evaluate the impact of implementing a CMAC retrofit on pollutant reduction. Further, grab sampling and laboratory testing was performed to verify and compare findings using the real-time sensors. In addition, the effect of longer retention periods on water temperature will be explored in order to optimize the length of retention and timing of release.

Micah Strauss

Project Manager


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394564 - Real-Time Water Quality in an Active Control Wet Pond

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