Evaluation of First Flush Phenomenon from Bridge and Parking Lot Sites in the Gyeongan Watershed in Korea

Urban land-use areas with high imperviousness, such as bridges, highways, and parking lots, are known to be responsible for relatively large amounts of stormwater runoff and high concentration of pollutants particularly in the "first flush". This study was conducted to determine the effect...

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Bibliographic Details
Published in:Water environment research 2013-03, Vol.85 (3), p.203-210
Main Authors: Memon, Sheeraz, Go, Sunghoon, Lee, Chang-Hee
Format: Article
Language:English
Subjects:
Applied sciences
Best management practices
Bridges
Chemical oxygen demand
Continental surface waters
Environmental Monitoring - methods
Exact sciences and technology
first flush effect
imperviousness
Korea
Land use
Natural water pollution
Parking lots
Pollutants
Pollution
Pollution load
Rain
Rainwaters, run off water and others
Runoff
Stormwater
Stormwater management
stormwater runoff
Suspended solids
Urban areas
urban land use
Water Movements
Water pollution
Water quality
Water treatment and pollution
Watersheds
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Summary:Urban land-use areas with high imperviousness, such as bridges, highways, and parking lots, are known to be responsible for relatively large amounts of stormwater runoff and high concentration of pollutants particularly in the "first flush". This study was conducted to determine the effect of first flush from urban land-use sites located in Yongin City, Korea, on runoff amounts and pollutant concentration. It was observed that, on most pollutant parameters, the effect was apparent when the data were analyzed qualitatively but it was relatively weak when analyzed quantitatively. A stronger effect was observed from a bridge site than from a parking lot site. Pollutant loads, washed off at 40 and 60% runoff volume, respectively, were also determined for further analysis of the first flush effect to find an improved strategy for best management practices. In this study, no correlation was observed between rainfall intensity and runoff duration with first flush effect.
ISSN:1061-4303
1554-7531
DOI:10.2175/106143012X13373550427110