Journal of Wetlands Research (한국습지학회지)

Korean Wetlands Society (한국습지학회)
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A Study on the Analysis of Non-point Source Runoff Characteristics and Verification of Unit Pollutant Load Considering Baseflow Runoff

기저유출을 고려한 비점오염 유출특성 분석과 원단위 검증에 관한 연구

  • Park, Jaebeom (Daon Solution Co., Ltd) ;
  • Kal, Byungseok (Daon Solution Co., Ltd) ;
  • Lee, Chulgu (Geum River Environment Research Center, National Institute of Environment Research) ;
  • Hong, Seonhaw (Geum River Environment Research Center, National Institute of Environment Research) ;
  • Choi, Moojin (Geum River Environment Research Center, National Institute of Environment Research)
  • 박재범 ((주)다온솔루션) ;
  • 갈병석 ((주)다온솔루션) ;
  • 이철구 (국립환경과학원 금강물환경연구소) ;
  • 홍선화 (국립환경과학원 금강물환경연구소) ;
  • 최무진 (국립환경과학원 금강물환경연구소)
  • Received : 2017.07.17
  • Accepted : 2017.07.28
  • Published : 2017.08.31
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Abstract

In this study, the characteristics of non-point source pollution runoff and the possibility of using new unit load were investigated by using pollutant load based on monitoring data considering baseflow. For this purpose, the components of hydrograph were separated by using digital filter method and the numerical integration method was applied to calculate the non-point source pollutant load for nine rainfall events in Juwon river in the Geum River basin. As a result of this study, the mean contribution rate of non-point pollutant was 31.34% for BOD, 58.94% for T-N, and 50.42% for T-P and BOD was more influenced by baseflow pollutant. Also, it was analyzed the pollutant load using the new unit load is closer to the observation load than the old unit load. This result implies that it is necessary to manage not only pollutant load due to direct runoff but also pollutant load due to baseflow runoff for efficient water quality management of the watershed.

본 연구에서는 기저유출을 고려한 관측 자료 기반 오염부하량을 이용하여 비점오염 유출특성과 신규 원단위의 활용 가능성을 검토하였다. 이를 위해 금강 수계 주원천 유역의 9개 강우사상을 대상으로 디지털 필터 기법을 이용하여 유출성분을 분리하고 수치적분법을 적용하여 비점오염부하량을 산정하였다. 연구결과 비점오염 평균 기여율은 BOD 31.34%, T-N 58.94%, T-P 50.42%로 BOD의 경우 기저유출의 영향이 큰 것으로 분석되었다. 또한, 신 원단위를 적용한 오염부하량이 구 원단위를 적용한 경우에 비해 관측부하량에 근접하는 것으로 분석되었다. 이러한 결과는 효율적인 유역의 수질관리를 위해서는 직접유출에 따른 오염부하뿐만 아니라 기저유출에 따른 오염부하 관리도 필요함을 의미한다.

Keywords

References

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