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KMID : 1024520140230030511
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Journal of the Environmental Sciences
2014 Volume.23 No. 3 p.511 ~ p.520
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Estimation of Runoff Characteristics of Nonpoint Pollutant Source in Railroad Area
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Lee Chun-Sik
Seo Gyu-Tae
Yoon Cho Hee
Kwon Hun-Gak
Lee Jae-Woon
Cheon Se-Uk
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Abstract
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The MFFn(Mass first flush), EMCs(Event mean concentrations) and runoff loads were analyzed for various rainy
events(monitoring data from 2011 to 2012) in transportation area(rail road in station). The pollutant EMCs by volume of
stormwater runoff showed the BOD5 9.6 ㎎/L, COD 29.9 ㎎/L, SS 16.7 ㎎/L, T-N 3.271 ㎎/L, T-P 0.269 ㎎/L in the
transportation areas(Railroad in station). The average pollutant loading by unit area of stormwater runoff showed the BOD5
27.26 kg/㎢, COD 92.55 kg/㎢, SS 50.35 kg/㎢, T-N 10.13 kg/㎢ and T-P 10.13 kg/㎢ in the transportation areas. Estimated
NCL-curve(Normalized cumulated-curve) was evaluated by comparison with observed MFFn. MFFn was estimated by
varying n-value from 10% to 90% on the rainy events. The n-value increases, MFFn is closed to '1'. As time passed, the
rainfall runoff was getting similar to ratio of pollutants accumulation. The result of a measure of the strength of the linear
relationship between observed data and expected data under model was good.
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KEYWORD
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Mass first flush(MFF), Event mean concentrations(EMCs), Runoff, Rainfall, Stormwater, Normalized cumulated-curve(NCL-curve)
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