Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Determination of EMC and MFFn Rainfall Runoff in Songcheon, Doam Lake Watershed

도암호 유역 송천에서의 강우유출수 분석을 통한 EMC와 초기세척비율 (MFFn) 산정

  • Kwon, Hyeokjoon (Department of Environment Sciences, Kangwon National University) ;
  • Kim, Jonggun (Department of Rural Construction Engineering, Kangwon National University) ;
  • Lim, Kyoungjae (Department of Rural Construction Engineering, Kangwon National University) ;
  • Kim, Dongjin (Wonju Regional Environmental Management Office) ;
  • Hong, Eunmi (School of Natural Resources and Environmental Science, Kangwon National University)
  • Received : 2020.05.12
  • Accepted : 2020.06.17
  • Published : 2020.07.31
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Abstract

The Doam Lake watershed has a significant impact on the downstream water system due to nutrients and sediment outflow during rainfall caused by steep slopes, soil losses, and fertilization. These non-point sources are unclear in the discharge area and are affected by land use patterns, soil characteristics, and topographical features of the watershed. Therefore, this study conducted rainfall monitoring from July to October 2019 in Songcheon upstream of the Doam Lake watershed, one of the non-point pollution source management areas. Then, after analyzing rainfall runoff, Event Mean Concentration (EMC) and Mass First Flush ratio (MFFn) were calculated to compare and analyze the characteristics of rainfall and the non-point pollutant discharge. As a result of the analysis, it showed various non-point pollutant emission characteristics for each rainfall event. In addition, the concentration of EMC and the MFFn were affected by the average rainfall intensity and the maximum rainfall intensity, and were not significantly affected by the number of antecedent drying days. In the future, it is expected that effective non-point source reduction measures and management measures according to rainfall intensity through continuous monitoring and analysis will be needed.

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References

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