Simulation computing method and device of landslide surge disaster

Abstract

The invention discloses a simulation computing method and device of a landslide surge disaster. The method comprises the steps of building a three-dimension computing domain model according to the obtained terrain, the water level and the landslide mass shape and the position information; according to a Navier-Stokes partial differential equation set which conducts integral in the thickness and water depth direction of the landslide mass, obtaining the motion of water and the landslide mass and the mutual effect of the water and the landslide mass, and simulating the process that surges are generated, propagated and climbs along a bank according to the change of the water pressure after the landslide mass enters the water; visualizing the landslide motion and the surge propagation rule, conducting numerical forecasting on the surge motion trail and the impact influence area, and evaluating the surge disaster. By means of the simulation computing method and device of the landslide surgedisaster, by conducting numerical forecasting on feature parameters and the influence area of the surge motion, the surge disaster can be evaluated, the method and device have great theoretical significance and high practical value in evaluating the surge disaster and predicting the landslide on the reservoir bank and the secondary disaster of the surges, and also have reference significance in numerical simulation of geological disasters like debris flow and barrier lakes.

Description

technical field [0001] The present invention relates to geological disasters, water conservancy engineering disaster prediction and the technical field of risks, in particular to a simulation calculation method and device for landslide surge disasters. Background technique [0002] At present, the traditional engineering methods (such as the method recommended by the American Society of Civil Engineers (ASCE) or the Pan Jiazheng method) used in the assessment of surges in China are based on empirical formulas summarized by two-dimensional experiments, which regard the landslide body as a rigid body and fail to consider the The interaction between body and water body, and the three-dimensional effect of the swell generation process cannot be considered, so it is difficult to obtain reasonable and credible calculation results. [0003] In addition, some current numerical simulation methods basically use the energy conservation equation to estimate the sliding speed of the land...

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Problems solved by technology

[0004] However, in fact, the process of the high-speed landslide mass entering the water surge is very complicated, involving the mutual coupling between the landslide mass and the water body

Existing numerical methods, including methods based on traditional shallow water equations, cannot accurately reflect the strong interaction between the two phases, and cannot accurately simulate the motion characteristics of landslides and surges

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