Field test of stormwater best management practices

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:82792

Yu, S L; Kaighn, Jr, R J; Liao, S L ^[1]; Barnes, S L ^[2]

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1. Univ. of Virginia, Charlottesville, VA (United States). Dept. of Civil Engineering and Applied Mechanics
2. CH2M-Hill, Herndon, VA (United States)

A dry detention pond, hydraulically modified and draining a small and highly impervious area, and a highway median grassed swale in Charlottesville, Virginia were monitored for a fifteen-month period to test their ability in reducing stormwater pollution. Pollutants examined included total suspended solids, total phosphorus, chemical oxygen demand, and total zinc. The results indicate that for the modified dry pond (with a 7.6 cm or 3 in outflow orifice) an average removal rate of about 50% was obtained for total suspended solids; 40% for total phosphorus; and 30% for both chemical oxygen demand and total zinc. Slightly higher removal rates were obtained for the 31 m or 100 ft long swale with a check dam. Modeling analyses of the pond show that the pollutant removal rate is closely related to the total volume and the intensity of the rainfall events. Both the pond and the swale are fairly effective in removing pollutants when the rainfall volume is small and when storm intensity is low and duration is long.

• OSTI ID: 82792
• Report Number(s): CONF-940789--; ISBN 0-7844-0031-8
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
MATHEMATICAL MODELS
MONITORING
PHOSPHORUS
PONDS
REMEDIAL ACTION
REMOVAL
RUNOFF
VIRGINIA
WATER POLLUTION
ZINC