Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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A by-pass rainwater penetration sewer system for urban flooding mitigation

도시침수 저감을 위한 by-pass 빗물침투성 우수관거

  • Lee, Bum-Sub (Department of Civil Engineering, The University of Seoul) ;
  • Ko, Keon-Ho (Urban Planning Department, Dohwa Engineering Co., Ltd.) ;
  • Kang, Ho-Yeong (Department of Civil Engineering, The University of Seoul) ;
  • Moon, Young-Il (Department of Civil Engineering, The University of Seoul)
  • 이범섭 (서울시립대학교 토목공학과) ;
  • 고건호 ((주)도화엔지니어링 도시단지부) ;
  • 강호영 (서울시립대학교 토목공학과) ;
  • 문영일 (서울시립대학교 토목공학과)
  • Received : 2016.07.07
  • Accepted : 2016.08.22
  • Published : 2016.09.30
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Abstract

The aim of this study is to determine and propose the by-pass rainwater sewer system in order to reduce the urban floodplain from the locality heavy rain every year during the dry season and the sinkholes in the city as well as the shortage of groundwaters due to extreme hot weather condition and urban heat island phenomenon. Heavy rain occurs more than the years of heavy rainfall probability, comparison between the place where uses the existing pipes and connect the sewer system with by-pass rain permeability and without expanding sewer pipe replacement at intersection of Gangnam station 3.07 ha at Gangnam-gu, Seoul Metropolitan area, it indicates that average of 27 million KRW (44%) maintenance cost savings and maintain existing sewer system without any other countermeasures. For the city flooded reduction, by-pass rainwater permeable rainwater pipe multiplying the probability the number of years during summer season and increase the water flow capacity during spring and fall when a small amount of rain that, it also contribute to the total amount of underground water secured through the by-pass penetration.

본 연구는 기상이변과 도시열섬현상으로 국지성 호우가 잦아져 도시침수피해가 매년 반복되고 있으며, 건기시에는 비가 모자라 지하수 부족으로 이어져 하천 건천화 현상이 빈번히 발생하고 있어 이를 해결하고자 "도시침수 저감을 위한 by-pass 빗물침투성 우수관거"를 제안한다. 집중호우로 확률년수 이상의 호우발생시 관거를 확대 교체하지 않고 기존우수 관거를 그대로 사용하며 배제시스템과 연계하여 by-pass 빗물침투성 우수관거를 설치하여 본 연구지역 대한민국 서울특별시 강남구 강남역사거리 지역 3.07 ha에서 관거확대공사와 비교시 평균 27백만원(44%) 공사비절감 및 기존 우수관거 유지로 별도의 우수처리 대책이 불필요하다. "도시침수 저감을 위한 by-pass 빗물침투성 우수관거"는 여름철 확률년수 이상의 비가 오더라도 by-pass관로를 통하여 통수능력을 증가시키며, 봄, 가을에 내리는 소량의 비는 by-pass 침투공을 통하여 전량 지중 수자원 확보에 기여한다.

Keywords

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