Abstract:With the continuous development of hydropower clean energy in China, many large hydropower projects have been built and put into operation. However, high dams and large reservoirs have led to frequent geological disasters in the reservoir area. Among them, reservoir landslide hazards are a major threat to the stability of project operation and the safety of life and property in the reservoir area, and it has become a major national demand to improve its comprehensive prevention and control capability. A reservoir landslide is a complex geological integration, which is influenced by intrinsic factors such as regional geological and topographical conditions and external hydrodynamic factors such as rainfall and reservoir water level changes. From the beginning of deformation to final instability, reservoir landslides generally take a long period of time and are an accumulating development process, involving not only the spatial and temporal superposition of rainfall infiltration and reservoir water level fluctuation but also the progressive cumulative effect of multi-factor coupling. Therefore, the mechanism of landslides in reservoir areas is very complex, and the difficulty of prevention and control is extremely high. Based on many field investigations, indoor and outdoor tests, and numerical simulations, the influence of geological and hydrological conditions on landslide susceptibility and spatial distribution was summarized, and the cumulative catastrophic instability mechanism of landslides in the reservoir area was revealed. The landslide surge simulation technology coupled with the discrete element model and the fluid mechanics model (DEM-SPH) was established, which could better reveal the strong collision between the high-speed landslide mass and the water flow and the nonlinear propagation process of the surge, and could provide a scientific basis for the landslide disaster affected area and the formulation of emergency risk avoidance plan. The monitoring technology of the 3D deformation evolution of reservoir landslides based on UAV and terrestrial laser scanning data fusion was constructed, and the comprehensive treatment technology of reservoir landslides was summarized. In addition, in view of the lack and limitation of research on the complex disaster-causing mechanism and prevention and control technology of landslides in the reservoir area driven by multiple factors, the future development direction of landslides in the reservoir area in terms of cumulative instability and stability evaluation of disasters, multi-source fusion monitoring and intelligent early warning, landslide surge fluid-solid coupling simulation and disaster impact assessment, and ecological measures support structure joint governance technology was expected to provide a reference for the research on landslide disaster prevention, control, and reduction in the reservoir area.