Post-earthquake debris flow dynamic sensitivity evaluation method based on object source activity intensity

Abstract

The invention discloses a post-earthquake debris flow dynamic sensitivity evaluation method based on object source activity intensity. The method comprises the steps of selecting eight evaluation factors through analyzing the dynamic change of a debris flow collapse object source body in a research region, and the eight evaluation factors comprise the object source activity change amount; performing probability cross analysis on the evaluation factor and the previous debris flow outbreak event to obtain an evaluation factor normalization standard; calculating evaluation factor weight values byadopting a grey correlation method and taking debris flow outbreak events in previous years as reference columns; and evaluating the debris flow sensitivity of the current year by using the obtainedevaluation model, and grading the debris flow sensitivity of the current year to realize dynamic and effective prediction of the debris flow outbreak possibility. According to the method, the evaluation unit is fully considered to be a single debris flow gully, the influence of the annual debris flow source variation on the sensitivity of the evaluation unit is considered, the defect of weak current situation in the past can be eliminated, and the dynamic sensitivity evaluation taking the debris flow gully as the evaluation unit in the region is realized.

Description

technical field [0001] The invention relates to the technical field of debris flow disaster prevention and control engineering, in particular to a method for evaluating dynamic sensitivity of debris flow after an earthquake based on source activity intensity. Background technique [0002] After each debris flow outbreak, the source of debris in the debris flow ditch has changed accordingly, and some debris flow trenches have established prevention and control projects. However, the existing debris flow sensitivity discrimination method is based on the first-phase data, ignoring the impact of source changes on the debris flow outbreak, resulting in the current debris flow evaluation method is not strong, and can not dynamically determine the sensitivity of the debris flow gully after the earthquake. effective discrimination. [0003] For example, the Chinese patent document with the publication number CN 103412113A and the publication date of November 27, 2013 discloses a po...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned patent represents the existing technology. Due to the limitation of objective conditions at that time, no dynamic sensitivity evaluation research was carried out on the debris flow sensitivity assessment, and the obtained results are only applicable to debris flow outbreaks under the conditions at that time.

Images