IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2013  > Vol10 No.4
GIS-based Numerical Modelling of Debris Flow Motion across Three-dimensional Terrain
Wu Jian; Chen Guang-qi; Zheng Lu; Zhang Ying-bin
Corresponding AuthorZHANG Ying-bin
2013-08
Source PublicationJournal of Mountain Science
Volume10Issue:4Pages:522-531
AbstractThe objective of this study is to incorporate a numerical model with GIS to simulate the movement, erosion and deposition of debris flow across the three dimensional complex terrain. In light of the importance of erosion and deposition processes during debris flow movement, no entrainment assumption is unreasonable. The numerical model considering these processes is used for simulating debris flow. Raster grid networks of a digital elevation model in GIS provide a uniform grid system to describe complex topography. As the raster grid can be used as the finite difference mesh, the numerical model is solved numerically using the Leap-frog finite difference method. Finally, the simulation results can be displayed by GIS easily and used to debris flow evaluation. To illustrate this approach, the proposed methodology is applied to the Yohutagawa debris flow that occurred on 20th October 2010, in Amami-Oshima area, Japan. The simulation results that reproduced the movement, erosion and deposition are in good agreement with the field investigation. The effectiveness of the dam in this real-case is also verified by this approach. Comparison with the results were simulated by other models, shows that the present coupled model is more rational and effective.
KeywordDebris Flow Numerical Simulation Gis Movement Erosion Deposition Equilibrium Concentration
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/5659
CollectionJournal of Mountain Science_Journal of Mountain Science-2013_Vol10 No.4
Recommended Citation
GB/T 7714
Wu Jian,Chen Guang-qi,Zheng Lu,et al. GIS-based Numerical Modelling of Debris Flow Motion across Three-dimensional Terrain[J]. Journal of Mountain Science,2013,10(4):522-531.
APA Wu Jian,Chen Guang-qi,Zheng Lu,&Zhang Ying-bin.(2013).GIS-based Numerical Modelling of Debris Flow Motion across Three-dimensional Terrain.Journal of Mountain Science,10(4),522-531.
MLA Wu Jian,et al."GIS-based Numerical Modelling of Debris Flow Motion across Three-dimensional Terrain".Journal of Mountain Science 10.4(2013):522-531.
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