Water Quality Performance of a Batch-Type Stormwater Detention Basin
Authors: Middleton, John R; Barrett, Michael E
Source: Water Environment Research, Volume 80, Number 2, February 2008 , pp. 172-178(7)
Publisher: Water Environment Federation
Abstract:The objective of this research was to modify an extended detention basin to provide batch treatment of stormwater runoff. An automated valve/controller was developed and placed on the outlet of a detention basin in Austin, Texas, which allowed the water quality volume to be retained in the basin for a preset length of time. The influent and effluent of the modified basin were monitored for total suspended solids (TSS), nutrients, chemical oxygen demand (COD), and total and dissolved metals. Statistically significant removal of total metals, COD, total nitrogen, total phosphorus, and TSS was observed, with a discharge event mean TSS concentration of 7 mg/L and a TSS removal efficiency of 91%. The modified basin has substantially better pollutant removal than conventional extended detention basins and is comparable with that of Austin sand filters, which are a common structural stormwater treatment system in the Austin area. The valve also can be used to isolate hazardous material spills.
Document Type: Research Article
Publication date: February 1, 2008
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