Landslide susceptibility evaluation method and system

Abstract

The invention discloses a landslide susceptibility evaluation method and system. The method comprises the steps of selecting evaluation factors based on basic data of a to-be-researched region; giving evaluation factor weights through a frequency ratio model; using SPSS software to carry out multi-collinearity diagnosis on the evaluation factors, and removing factors with multi-collinearity; based on the weight values of the residual evaluation factors, grading the geological disaster susceptibility through a logistic regression model; generating an average deformation rate map based on the SAR data; establishing an incidence matrix based on the average deformation rate diagram and the geological disaster susceptibility grade; and correcting the geological disaster susceptibility grade based on the relation matrix. On one hand, the frequency ratio-logistic regression coupling model is utilized to solve the defect that the precision of evaluating the landslide susceptibility by a single model is low, on the other hand, the InSAR is utilized to solve the limitation that a real historical landslide data set is difficult to obtain due to complex topographic conditions, and meanwhile, the InSAR result is utilized to optimize the grade of the landslide susceptibility.

Description

technical field [0001] The invention relates to the technical field of geological hazard evaluation, in particular to a landslide susceptibility evaluation method and system. Background technique [0002] Our country is a country where geological disasters occur frequently, and the geological disasters that occur every year cause serious losses to our country. Especially in the western region where the geological environment is particularly complex, geological disasters will not only seriously damage the ecological environment of the region, but also seriously threaten the safety of human life and property. The evaluation of geological disaster susceptibility is to study the possibility of geological disasters in a certain area, usually using extremely high, high, medium, low, and extremely low susceptibility levels for evaluation. Carrying out research on the susceptibility of geological disasters along highways can provide important basis for highway maintenance, disaster...

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Problems solved by technology

However, evaluating the susceptibility of geological hazards is a complex process, and various influencing factors related to landslide hazards must be considered. However, in actual work, there are still many uncertainties in obtaining various environmental factors. Due to the complexity of geographical conditions in some areas, it is difficult to obtain real and effective historical landslide data sets, which makes the evaluation of geological disaster susceptibility less accurate

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