Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Simulation and analysis of urban inundation using the integrated 1D-2D urban flood model

1D-2D 통합 도시 침수 해석 모형을 이용한 침수 원인 분석에 관한 연구

  • Lee, Seungsoo (Department of Climate Application, APEC Climate Center) ;
  • Noh, Seong Jin (Department of Civil Engineering, University of Texas at Arlington) ;
  • Jang, Cheolhee (Hydro Science and Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Rhee, Dong Sop (Hydro Science and Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology)
  • 이승수 (APEC 기후센터 응용사업본부) ;
  • 노성진 ;
  • 장철희 (한국건설기술연구원 수자원.하천연구소) ;
  • 이동섭 (한국건설기술연구원 수자원.하천연구소)
  • Received : 2017.02.23
  • Accepted : 2017.04.05
  • Published : 2017.04.30
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Abstract

Integrated numerical approaches with physically-based conceptualization are required for accurate urban inundation simulation. In this study, we described, applied and analyzed an integrated 1-dimensional (1D) sewerage system and 2-dimensional (2D) surface flow model, which was suggested by Lee et al. (2015). This model was developed based on dual-drainage concept, and uses storm drains as an discharge exchange spot rather than manholes so that interaction phenomena between surface flow and sewer pipe flow are physically reproduced. In addition, the building block concept which prevents inflows from outside structures is applied in order to consider building effects. The capability of the model is demonstrated via reproducing the past flooding event at the Sadang-cheon River catchment, Seoul, South Korea. The results show the plausible causes of the inundation could be analysed in detail by integrated 1D-2D modeling.

고정확도의 도시침수 모의를 위해서는 물리적 개념에 기반한 통합적 수치해석이 필요하다. 본 연구에서는 Lee et al. (2015)이 개발한 1차원 하수관망, 2차원 범람 모형의 국내 적용성을 검토하고, 과거 도시 홍수 사상의 침수 원인 분석을 수행하였다. 본 모형은 이중배수 개념에 기반하여 멘홀 대신 집수구를 지표면과 하수관망 사이의 교환유량 산정 지점으로 이용하므로 보다 실제와 유사하게 침수 과정을 모의할 수 있을 뿐 아니라 지표면 범람 해석시 건물에 의한 차단 효과를 고려할 수 있다. 개발된 모형의 적용성은 서울 사당 유역에서 발생한 침수 사상에 대해서 재현 모의를 통해 검증하였다. 적용 결과, 본 연구에서 개발된 모형은 실제 침수 피해 영역을 실제와 유사하게 모의 하였을 뿐만 아니라 침수 원인을 보다 자세히 분석할 수 있는 장점을 보여주었다.

Keywords

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