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http://dx.doi.org/10.15681/KSWE.2018.34.6.650

Comparison of Rainfall-Runoff Characteristics at Stream in Urban and Rural Watershed  

Kim, Ho-Sub (Korea Environmental Consulting)
Kim, Sang-Yong (Korea Environmental Consulting)
Park, Yun-Hee (Korea Environmental Consulting)
Publication Information
Journal of Korean Society on Water Environment / v.34, no.6, 2018 , pp. 650-660 More about this Journal
Abstract
The objective of this study was to compare the rainfall-runoff characteristics in streams of classified urban and rural watershed using land use and population density. EMC (event mean concentration) of BOD, COD, TP and SS increased significantly in urban and rural watershed, but that of TN remained unchanged. Although there were no significant differences in EMC of BOD, COD, TN, TP depending on the watershed characteristics, EMC of BOD and COD significantly increased in the urban watershed, while EMC of TP increased in the rural watershed. In the urban watershed, the first flush time was faster and the first flush effect was stronger in BOD, COD, and TP. However, the difference between cumulative mass and cumulative volume was found to be less than 0.2 in the rural watershed, indicating a weak first flush effect. The discharged masses of BOD (70 %), COD (64 %), and TP (66 %) in the first flush of runoff were higher in urban watershed, while TN (67 %) was higher in rural watershed. The reproducibility of first flush time and the strength of first flush using CV (coefficient of variation) was found to be more reproducible for first flush time in both watersheds. In rural watershed, the CV value of first flush time for TP out of water quality parameters was lower. Whereas the CV values of first flush time for BOD, COD and TP in urban watersheds were similar.
Keywords
EMC; First flush effect; Runoff; Rural watershed; Urban watershed;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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