KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Numerical Simulation and Laboratory Experiment of Flooding on a Perpendicular Floodplain with Dam-Break Flows

댐 붕괴 흐름에 의한 직립 홍수터의 범람 실험 및 모의

  • 황승용 (한국건설기술연구원 국토보전연구본부) ;
  • 김형석 (군산대학교 공과대학 토목공학과)
  • Received : 2020.11.20
  • Accepted : 2020.12.08
  • Published : 2021.06.01
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Abstract

Numerical simulation with Hwang's scheme, which can analyze shallow-water flow over discontinuous topography, was compared with a laboratory experiment of flooding on a perpendicular floodplain with dam-break flows. The simulation results were in good agreement with the results measured in an experimental flume with a reservoir, channel, and floodplain. The wetting and drying process on a perpendicular floodplain with a dam-break flow was particularly well simulated. The difference in simulation results according to the type of flow resistance was insignificant. The results of this study are expected to improve the accuracy of predicting inundation in urban rivers.

불연속 지형을 지나는 천수 흐름을 해석할 수 있는 Hwang의 기법이 채택된 수치 모의를 댐 붕괴 흐름에 의한 직립 홍수터의 범람 실험과 비교하였다. 모의 결과는 저수지, 저수로, 홍수터로 이루어진 실험 수로에서 측정한 결과와 잘 일치하였다. 특히, 댐 붕괴 흐름이 직립 홍수터로 차고 빠지는 과정이 잘 모의되었다. 흐름 저항의 종류에 따른 모의 결과의 차이는 미미하였다. 이 연구를 바탕으로 도심 하천의 범람 예측에서 정확도를 높일 수 있을 것으로 기대된다.

Keywords

Acknowledgement

이 연구는 한국건설기술연구원(주요사업 과제번호: 20200417)의 지원에 의한 것이며, 선행 연구에 대해서는 국토교통과학기술진흥원(과제번호: 14CCTI-C063749)의 일부 지원이 있었음을 밝혀둔다. 본 논문은 2020 CONVENTION 논문을 수정·보완하여 작성되었습니다.

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