GIS-based two-dimensional numerical simulation of debris flow

Chun Xiang Wang, Shi Wei Bai, Tetsuro Esaki, Yasuhiro Mitani

研究成果: ジャーナルへの寄稿学術誌査読

13 被引用数 (Scopus)


To predict the ran out distance and extent of the hazard area of rainfall-induced debris flows, we proposed a depth-averaged two-dimensional numerical model, in which the debris and water mixture is assumed to be a uniform continuous, incompressible, unsteady Newtonian turbulence fluid. As raster grid networks of digital elevation model in GIS can be used as the finite difference mesh, the continuity and momentum equations are solved numerically using the finite difference method. All the input data and output are processed in GIS. The model is applied to simulate the rainfall-induced real debris flow of July 20, 2003, in Minamata City of southern Kyushu, Japan. The simulation reproduces the propagation of the real debris flow; and the results are in good agreement with the field investigation. The two-dimensional numerical simulation using GIS can be used to estimate the potentially inundated areas, the potentially dangerous homes and roads for hazard and risk analysis.

ジャーナルYantu Lixue/Rock and Soil Mechanics
出版ステータス出版済み - 7月 2007

!!!All Science Journal Classification (ASJC) codes

  • 土木構造工学
  • 地盤工学および土木地質学
  • 土壌科学


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