Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Combined Inland-River Operation Technique for Reducing Inundation in Urban Area: The Case of Mokgam Drainage Watershed

도시지역의 침수저감을 위한 내외수 연계 운영 기법 개발: 목감천 유역을 중심으로

  • Kwon, Soon Ho (Future and Fusion Lab of Architectural, Civil and Environmental Engineering, Korea University) ;
  • Jung, Hyun Woo (Department of Civil, Environmental, and Architectural Engineering, Korea University) ;
  • Hwang, Yoon Kwon (Korea Hydro & Nuclear Power Co) ;
  • Lee, Eui Hoon (School of Civil Engineering, Chungbuk National University) ;
  • Kim, Joong Hoon (School of Civil, Environmental, and Architectural Engineering, Korea University)
  • 권순호 (고려대학교 미래건설환경융합연구소) ;
  • 정현우 (고려대학교 건축사회환경공학과) ;
  • 황윤권 (한국수력원자력(주)) ;
  • 이의훈 (충북대학교 토목공학부) ;
  • 김중훈 (고려대학교 건축사회환경공학부)
  • Received : 2020.10.30
  • Accepted : 2021.01.08
  • Published : 2021.01.31
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Abstract

Urban areas can often suffer flood damage because of the more frequent catastrophic rainfall events from climate change. Flood mitigation measures consist of (1) structural and (2) non-structural measures. In this study, the proposed method focused on operating an urban drainage system among non-structural measures. The combined inland-river operation technique estimates the inflow of pump stations based on the water level obtained from a preselected monitoring point, and the pump station expels the stored rainwater to the riverside based on those estimates. In this study, the proposed method was applied to the Mokgam drainage watershed, where catastrophic rainfall events occurred (i.e., 2010- and 2011-years), and severe flood damage was recorded in Seoul. Using the proposed method, the efficiency of flood reduction from the two rainfall events was reduced by 34.9 % and 54.4 %, respectively, compared to the current operation method. Thus, the proposed method can minimize the flood damage in the Mokgam drainage watershed by reserving the additional storage space of a reservoir. In addition, flooding from catastrophic rainfall can be prevented, and citizens' lives and property in urban areas can be protected.

최근 전 세계적으로 기후변화로 인해 설계빈도를 초과하는 강우가 발생함에 따라 도시 지역의 침수피해가 종종 발생한다. 도시 침수방어 대책으로는 구조적 대책과 비구조적 대책이 있다. 본 연구에서는 비구조적 대책 중에서 내배수 시스템의 운영에 초점을 두었다. 제안 방법인 내외수 연계 운영 방법은 상류 지점에 모니터링 지점을 선정하여 빗물펌프장에 유입되는 유입량을 예측하고, 이를 바탕으로 펌프를 운영하는 방법이다. 본 연구에서는 내외수 연계 운영 기술을 목감천 유역에 적용하였으며, 서울특별시에 큰 침수피해가 발생했던 기왕 강우인 2010년, 2011년 사상을 바탕으로 내외수 연계 운영 방법을 검증하였다. 2010년, 2011년 강우 사상을 적용 결과, 기존 운영 방법대비 침수 저감 효과는 각각 34.9 %, 54.4 % 만큼 감소한 것으로 확인되었다. 즉, 본 연구에서 제안한 내외수 연계 운영 방법은 유수지의 추가 저류공간을 확보함으로써 도시 유역 내에서 침수피해를 최소화했음을 확인하였다. 또한, 집중호우가 많이 발생하는 도시지역에서 침수를 예방하고, 시민의 생명과 재산을 지킬 수 있을 것으로 기대한다.

Keywords

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