RESEARCH ADVANCES IN DISASTER DYNAMICS OF LANDSLIDE TSUNAMI

With the development of large-scale cascade hydropower projects, the stability of the landslide in the reservoir and the potential tsunami disasters are one of the key factors affecting the safety of the full life cycle of the projects. In this study, the research advances in the stability and tsunami analysis methods of the bank slopes in the reservoir are analyzed systematically. For the stability analysis method of the slopes in reservoir, more and more researches focus on the analysis methods of water-geomaterials coupling and the stability evolution of the slopes under hydrodynamic environments such as rainfall and variation of the water level. The comparisons among the advantages and disadvantages of the physical model tests, the analytical methods and numerical simulation methods for the landslide tsunami, and the rapid development of numerical methods can show great advantages in simulation of the landslide tsunami. The progressive failure from start to sliding with high speed, the entry water and generating tsunami to depositing, and the propagation and climbing of the tsunami compose the different stages of the whole process of the landslide tsunami. It is also a continuous disaster process, although the disaster behaviors of different stages are obvious different. However, the slope stability analysis and the tsunami analysis are usually separated at present. So it is very difficult to reflect the whole process of the disaster chain of landslide tsunami. Using the high-performance numerical methods, building the analysis methods for landslide tsunami according to the physical and mechanical mechanisms of its whole disaster process would be the development trend and the key at present.