Journal of the Korean Society of Hazard Mitigation (한국방재학회 논문집)

Korean Society of Hazard Mitigation (한국방재학회)
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Development of Operation in Urban Offline Detention Reservoirs

도시지역 오프라인 빗물저류조 운영방법 개발

  • Lee, Eui Hoon (School of Civil, Environment, and Architectural Engineering, Korea University) ;
  • Lee, Yong Sik (School of Civil, Environment, and Architectural Engineering, Korea University) ;
  • Joo, Jin Gul (Department of Civil Engineering, Dongshin University) ;
  • Kim, Joong Hoon (Department of Civil & Environmental and Architectural Engineering, Korea University)
  • 이의훈 (고려대학교 공과대학 건축사회환경공학과) ;
  • 이용식 (고려대학교 공과대학 건축사회환경공학과) ;
  • 주진걸 (동신대학교 공과대학 토목공학과) ;
  • 김중훈 (고려대학교 공과대학 건축사회환경공학부)
  • Received : 2015.10.01
  • Accepted : 2015.12.30
  • Published : 2016.02.29
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Abstract

Recently, the ratio of impervious area, the number of extreme rainfall and runoff in urban areas are dramatically increasing. Because of this reasons, the number of flood disasters are also increasing and there are several measures such as structural measures and nonstructural measures. In this research, operation of drainage facilities among non-structural measures is focused. Operation in urban offline detention reservoirs among drainage facilities was studied. Operation obtaining additional capacity in detention reservoir by storage and discharge considering the status of sewer network was suggested. First flooded node in sewer network was selected as a monitoring point using probability rainfall data and operation of offline detention reservoir was determined according to the level of monitoring point. For verifying effects of new operation, rainfall data in 2010 and 2011 were applied to. In the case of 2010, maximum flood reducing effect of new operation was 28.52% and in the case of 2011, maximum flood reducing effect of new operation was 16.81%.

최근 도시지역 불투수면적비가 올라가고 도시침수를 발생시키는 강우의 횟수는 점점 증가하고 있다. 이로 인하여 침수 발생 횟수가 증가하고 있으며 이에 대한 해결책은 다양하다. 침수 문제를 해결하기 위한 방법으로는 구조적 대책과 비구조적 대책이 있다. 본 연구에서는 비구조적 대책 중에서 내배수시설의 운영에 초점을 맞추었다. 내배수시설 중 도시유역에 설치되는 오프라인 빗물저류조를 대상으로 하여 연구를 실시하였다. 우수관거의 상황을 고려한 저류 및 방류를 실시하여 빗물저류조 내에서의 추가적인 저류공간을 확보하는 운영을 제안하였다. 확률강우를 이용하여 최초월류발생지점을 고려한 모니터링 지점을 선택하고 모니터링 지점의 수위에 따라 빗물저류조의 운영이 결정되었다. 새로운 운영방법의 효과를 검증하기 위하여 기존에 침수가 발생했던 2010년, 2011년 강우를 강우-유출 모델에 적용하였다. 새로운 운영을 적용한 결과 기존 빗물저류조 운영에 비해 2010년의 경우 최대 28.52%, 2011년의 경우 최대 16.81%의 침수저감효과를 보였다.

Keywords

Acknowledgement

Supported by : 국토교통부

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  2. Determining optimal locations for rainwater storage sites with the goal of reducing urban inundation damage costs vol.21, pp.6, 2017, https://doi.org/10.1007/s12205-016-0922-6
  3. Suggestion of Critical Flooding Node Calculation Method Considering Non-structural Operation in Daerim 3 Urban Drainage Area vol.18, pp.2, 2018, https://doi.org/10.9798/KOSHAM.2018.18.2.467