Abstract
Landslide surge poses a serious threat to the life and property safety of hydraulic structures and surrounding people in the reservoir area. In this paper, the landslide body is equivalent to a quasi-fluid, and a Volume of Fluid (VOF) method for free surface tracking based on the N-S equation of incompressible fluid is proposed. Combined with the geological survey, this method is used to simulate and analyze the generation and propagation of the Huangping landslide surge in Xiluodu hydropower station. The results demonstrate that this method can simulate the process of landslide surge. Specifically, the entry of landslide rock and soil into water causes surges to propagate in the river channel, and can also climb up along the river bank. The propagation speed of the first surge increases with the propagation distance. The velocity of the water body at the surge front and within the vortex-like flow field formed by the surge front and the water moving from the high-water level is larger. As the surge continues to propagate, the wave will have a frequency difference and gradually disperse into a series of waves. In the process of surge generation and propagation, the difference between the highest water level and the lowest water level in the river can be larger than the surge height.
Published Version
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