River basin landslide space-time predicting method under rainfall effect

Abstract

The invention relates to a landslide space-time predicting method of a river basin scale, and aims to provide a river basin landslide space-time predicting method under a rainfall effect. The method comprises the following steps of: calculating a safety factor (SF) of any three-dimensional position in a river basin by using an InHM hydrological model, an unlimited side slope stability model and a landslide calculation module, fitting the safety factor into a specified time river basin safety factor distribution map and a specified time river basin landslide depth map through a visual module, and displaying the maps on display equipment; and if the landslide exists, selectively displaying the river basin landslide time distribution map. By the method, the river basin landslide can be analyzed and predicted effectively; the defect that a conventional model needs depression pretreatment in complex terrain is overcome; natural river basin geomorphic and hydrological response characteristics are maintained; a landslide mass is closer to an actual landslide mass shape; and a predicting error is reduced. Simultaneously, the precision and the applicability of a model are improved. The method is suitable for the landslide prediction of a simple side slope, a complex side slope and the river basin scale.

Description

technical field [0001] This project involves a watershed-scale landslide spatio-temporal prediction method. By combining the hydrological model based on physical concepts and the infinite slope stability model, the three-dimensional spatio-temporal prediction of the landslide catastrophe process within the watershed is carried out. It is a method that combines soil mechanics, A landslide early warning and forecasting method combining hydraulics and computer numerical simulation. Background technique [0002] my country's landslides are geological disaster-prone areas, and landslides cause huge economic losses and casualties every year. As a kind of geological disaster, landslide seriously endangers the production and life of local residents. The early warning and prediction of landslides has always been one of the focuses of engineering research, and its analysis theory is becoming more and more abundant. Still have not achieved high prediction accuracy and generality. Th...

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Problems solved by technology

These models have their own advantages and disadvantages. For example, non-deterministic models are generally applicable to specific research areas, and it is difficult to extract information related to landslide geology, mechanics and other external conditions, and cannot perform good physical and mechanical interpretation. The main disadvantage of the deterministic model is that it is difficult to find a model suitable for complex media with multiple uncertain factors. Among them, the existing infinite slope stability model uses the surface slope direction as the sliding direction of the landslide mass, and the stability of the landslide in the depression area Computing tends to be safe

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