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Simulation of the Debris Flow Using FLO-2D According to Curve-shape Changes in Bed Slopes

FLO-2D를 활용한 경사지 형상에 따른 토석류 흐름양상에 대한 수치모의

  • Jung, Hyo Jun (Dept. of Civil Engineering, Hongik Univ.) ;
  • Yoo, Hyung Ju (Dept. of Civil Engineering, Hongik Univ.) ;
  • Lee, Seung Oh (Dept. of Civil Engineering, Hongik Univ.)
  • 정효준 (홍익대학교 토목공학과) ;
  • 유형주 (홍익대학교 토목공학과) ;
  • 이승오 (홍익대학교 토목공학과)
  • Received : 2020.07.26
  • Accepted : 2020.09.05
  • Published : 2020.09.30

Abstract

Due to a high portion of mountainous terrains in Korea, debris flow and its disasters have been increased. In addition, recently localized flash-floods caused by climate change should add frequencies and potential risks. Grasping and understanding the behaviors of debris flow would allow us to prevent the consequent disasters caused by its occurrence. In this study, we developed a number of cases by changing the bottom slopes and their curvatures and investigated their effects on potential damage caused by the debris flow using FLO-2D. As simulating each bed slopes we analyzed for velocity, depth, impact, reach distance, and reach shape. As a result the lower the average slope, the greater the influence of its curvature and the numerical results were analyzed with showed a well-marked difference in impact stress and flow velocity. The result from this study could be referred for protecting from the debris flows when design countermeasure structures in mountainous regions.

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