GIS-Based Probabilistic Mapping of Landslide Hazard Using a Three-Dimensional Deterministic Model |
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| Authors: | Xie Mowen Esaki Tetsuro Zhou Guoyun |
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| Institution: | (1) Institute of Environmental Systems, Kyushu University, Hakozaki 6-10-1, Higashi Ku, Fukuoka, Japan;(2) College of Resource Engineering, The University of Science and Technology Beijing, Xueyuan Lu 30, Haidian District, Beijing, 10083, China |
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| Abstract: | Based on a new Geographic Information Systems (GIS) grid-basedthree-dimensional (3-D) deterministic model and taking the slopeunit as the mapping unit, this study maps landslide hazard usingthe 3-D safety factor index and failure probability. Assuming theinitial slip to be the lower part of an ellipsoid, the 3-D critical slipsurface in the 3-D slope stability analysis is located by minimizingthe 3-D safety factor using the Monte Carlo random simulation.The failure probability of the landslide is calculated using anapproximate method in which the distributions of c,  andthe 3-D safety factor are assumed to be in normal distribution.The method has been applied to a case study on three-dimensionallyand probabilistically mapping landslide hazard. |
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| Keywords: | Geographic Information Systems (GIS) three-dimensional slope stability failure probability Monte Carlo simulation slope unit landslide hazard |
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