Modeled Flow Duration Variations, Pollutant Discharges, and Costs for Different Stormwater Controls
Abstract:Runoff volume and pollutant discharges increase with development, with associated detrimental receiving water effects. These increases can be partially controlled by installing stormwater control practices, such as wet detention pond at outfalls, using conservation design controls such as grass swales and bioretention devices, and by improved development practices that reduce the amounts of impervious areas. The volume of runoff and the pollutants associated with the different source areas within a watershed can be used to identify the most likely suitable stormwater controls for the area. The reductions in runoff volume and pollutant discharges, and the costs associated with installing these control practices, are presented in this paper for an example 228 acre watershed located in Jefferson County, AL. This site consists of 75% commercial lands and 25% residential lands. The Source Loading and Management Model for Windows (WinSLAMM) was used to calculate the reduction of these pollutants and runoff volume, the associated variations in flow durations, and the costs involved with retrofitting different combinations of a wet detention pond, grass swales, and bioretention devices in the example watershed.
Document Type: Research Article
Publication date: January 1, 2006
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