Basis for Design of Wet Detention Basin BMP's

by John P. Hartigan, Camp Dresser & McKee, United States,

Document Type: Proceeding Paper

Part of: Design of Urban Runoff Quality Controls


Two different approaches have typically been used to formulate design criteria for wet detention basin best management practices (BMP's). One approach relies upon solids settling theory and assumes that all pollutant removal within the BMP is due to sedimentation. The other approach views the wet detention basin as a lake achieving a controlled level of eutrophication, in an attempt to account for biological and physical/chemical processes that have been documented as the principal nutrient removal mechanisms. This paper evaluates the different design methods for wet detention basin BMP's. General design criteria for facilities designed primarily for nutrient removal are outlined. The costs associated with alternate design criteria are presented for a typical regional BMP master plan.

Subject Headings: Detention basins | Best Management Practice | Biological processes | Nutrients | Building design | Rain water | Rainfall-runoff relationships | Water pollution

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