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Runoff Characteristics of Stormwater in Small City Urban Area  

Lee, Hong-Shin (School of Civil and Environmental Engineering, Kumoh National Institute of Technology)
Lee, Seung-Hwan (School of Civil and Environmental Engineering, Kumoh National Institute of Technology)
Publication Information
Abstract
This study was conducted to identify the magnitude of first flush in small city urban area and to provide the basic information on the criteria of stormwater runoff management. Monitoring site was surrounded by residential area in Gumi city near to national industrial complex and the monitoring period was three months. Total watershed area was 24.9 ha, where 80% of the area is impervious (asphalt of pavement type). Periodic monitoring of conventional water quality parameters were conducted with six times of rainfall period. Event mean and site mean concentrations for all the parameters were calculated based on the analytical results. Particle size distribution was 9.82 ${\mu}m$ for $D_{0.1}$, 38.99 ${\mu}m$ for $D_{0.5}$ and 159.61 ${\mu}m$ for $D_{0.9}$ respectively. First flush phenomenon was detected highly in particulate solids than dissolved ones. The first flush criteria results by mass first flush contained between 44.4% to 58.5% pollutant mass during the first 30% of runoff volume. Mass first flush ratio and particle size distribution obtained in this study are expected to provide the basic information for the design and operation of non-point source treatment facility.
Keywords
Event Mean Concentrations Site Mean Concentration; Particle Size Distribution; First Flush;
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Times Cited By KSCI : 1  (Citation Analysis)
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