Landslide displacement correlation analysis method based on maximum entropy Copula function

Abstract

The invention discloses a maximum entropy Copula function-based landslide displacement correlation analysis method. The method comprises the following steps of regarding landslide displacement and influence factors thereof as random variables, and generating edge distribution of the random variables by using a maximum entropy method; correlation measurement being carried out on each random variable; a Spearman rank correlation coefficient Kendall rank correlation coefficient and a tail correlation coefficient lambda being taken as correlation measurement indexes of the random variables, and correlation between the random variables being researched; selecting a Copula function and estimating parameters according to a correlation measurement result, and constructing two-dimensional or multi-dimensional joint probability distribution according to the selected random variables influencing landslide displacement; performing goodness-of-fit test, and determining an optimal Copula function through the test; analyzing primary and secondary factors influencing the landslide displacement and predicting the landslide displacement. The method is simple in step and clear in thought, can be usedfor correlation analysis of factors such as rainfall and reservoir water level rising and falling and landslide displacement, and monitors and warns landslide disasters through rainfall and reservoirwater level rising and falling measured values.

Description

technical field [0001] The invention belongs to the field of landslide disaster monitoring and early warning, and in particular relates to a landslide displacement correlation analysis method based on a maximum entropy Copula function, which aims to analyze the displacement change law of a landslide under the influence of factors such as rainfall and reservoir water level fluctuations. Background technique [0002] At present, most of the hydropower stations in China are built in the alpine and canyon areas. The potential landslides in the reservoir area are affected by rainfall and reservoir water level fluctuations during the hydropower construction and operation period, and the stability of the landslide decreases. It will directly affect the safe production of hydropower stations. Therefore, it is particularly important to analyze the displacement change law of landslides under the influence of factors such as rainfall and reservoir water level fluctuations, and to monit...

AI Technical Summary

Problems solved by technology

[0003] There is a correlation between rainfall, reservoir water level rise and fall, and landslide displacement. Univariate analysis of landslide displacement cannot solve practical problems. Therefore, it is necessary to use multivariate analysis methods to study the correlation between rainfall, reservoir water level rise and fall, and landslide displacement.

Images