Journal of Wetlands Research (한국습지학회지)

Korean Wetlands Society (한국습지학회)
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Comparison and Evaluation of the Inundation Areas by Levee Breaching using LISFLOOD

LISFLOOD 모형을 이용한 파제에 의한 범람면적 비교 평가

  • Choi, Cheon Kyu (Water Resources Research Division, Korea Institute of Civil Engineering and Building Technology) ;
  • Choi, Yun Seok (Water Resources Research Division, Korea Institute of Civil Engineering and Building Technology) ;
  • Kim, Kyung Tak (Water Resources Research Division, Korea Institute of Civil Engineering and Building Technology)
  • 최천규 (한국건설기술연구원 수자원연구실) ;
  • 최윤석 (한국건설기술연구원 수자원연구실) ;
  • 김경탁 (한국건설기술연구원 수자원연구실)
  • Received : 2014.04.18
  • Accepted : 2014.07.01
  • Published : 2014.08.31
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Abstract

The purpose of this study is to simulate inundation and evaluate the applicability of LISFLOOD model to the streams in South Korea by comparing with the inundation map using FLUMEN. The suggested levee breaching scenarios were applied to the LISFLOOD model, and the results obtained from scenarios were evaluated. The modeling results using LISFLOOD by appling the levee breaching scenarios showed 0.2% ~ 42% relative error with FLUMEN model in inundation area. But the relative error of maximum inundation area by overlapping all the flood analysis results from levee breaching scenarios such as the way making flood risk map was approximately 1.2% between two models. Meanwhile, LISFLOOD model was easy to construct input data, DEM as topographic data and discharge hydrograph as upper boundary conditions. And computing time of LISFLOOD was shorter than FLUMEN. Therefore LISFLOOD model can be applied usefully in the region that needs immediate inundation modeling.

본 연구의 목적은 LISFLOOD 모형을 이용하여 범람해석을 수행하고, 그 결과를 FLUMEN 모형에 의해 작성된 홍수범람도와 비교함으로써 국내하천에 대한 LISFLOOD 모형의 적용성을 평가하는 것이다. 이를 위해서 파제 시나리오를 작성하여 LISFLOOD 모형을 이용한 범람해석에 적용하였으며, 파제 시나리오별 범람해석 결과를 평가하였다. LISFLOOD 모형을 이용한 파제 시나리오별 범람해석 결과, FLUMEN 모형에 의해 작성된 홍수범람도와의 각 파제 구간별 범람면적의 상대오차가 0.2% ~ 42% 정도로 파제 지점에 따라서 다소 상이한 결과를 나타내었다. 그러나 홍수위험지도 제작방법과 같이 파제 시나리오의 범람해석 결과를 중첩하여 작성된 두 모형의 최대 범람면적에서는 약 1.2%의 상대오차를 보임으로써 서로 유사한 결과를 나타내었다. 한편 LISFLOOD 모형은 입력자료의 구축이 용이한 격자형태의 DEM과 상류단 경계조건인 수문곡선만을 활용하여 범람해석을 할 수 있으며, 범람해석에 소요되는 시간이 FLUMEN 모형보다 짧은 것으로 나타났다. 그러므로 신속한 범람해석이 필요한 지역에 대해서는 LISFLOOD 모형의 활용이 가능할 것으로 판단된다.

Keywords

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