Abstract: The existing smoothed particle hydrodynamics (SPH) method is normally difficult to establish the particle model in the simulation of landslide. This paper aims at developing a new particle arrangement and insertion method based on geographic information system (GIS). Firstly, the SPH particle model is established and its corresponding particle generation is programmed. Secondly, the Bingham fluid model combined with the Mohr-Coulomb failure criterion is used to achieve the three-dimensional movement process of the damaged slope. Finally, the SPH model is verified by simulating Tangjiashan landslide and is further applied to predict the influence of the Jinpingzi landslide. The results indicate that the established landslide SPH model based on spatial GIS data is feasible and applicable. Therefore, the simulation study of landslide disasters can not only enhance greatly the analysis of geological disasters, but also provide reference for the forecast and control of landslide hazard.

Key words: smoothed particle hydrodynamics (SPH), geographic information system (GIS), spatial data, landslide, particle model, movement process