Post-earthquake debris flow early recognition method

Abstract

The invention discloses a post-earthquake mud-rock flow early recognition method, which belongs to the technical field of mud-rock flow monitoring engineering, and is characterized by comprising the following steps of: a, determining an evaluation factor, and calculating a prior probability PP (m) and a posterior probability P (m) under each classification; b, constructing a regional debris flow susceptibility model through equal-weight superposition calculation; c, constructing a post-earthquake debris flow terrain induction degree model, and predicting the debris flow rushing-out range of each valley; and d, combining the object source sensitivity of the debris flow with the terrain induction degree to construct a post-earthquake debris flow early recognition model. The object source andtopographic conditions of the post-earthquake debris flow basin are considered, the object source sensitivity of the debris flow is introduced into a model, topographic factors are analyzed through alinear regression analysis method, and then an early recognition result of the post-earthquake debris flow is obtained through comprehensive equal weight superposition. The accuracy of debris flow identification in an earthquake area can be effectively improved, and powerful evidence is provided for prediction and prevention of debris flow after the earthquake.

Description

technical field [0001] The invention relates to the technical field of mud-rock flow monitoring engineering, in particular to an early identification method for mud-rock flow after an earthquake. Background technique [0002] Debris flow is a common geological disaster that occurs in mountainous areas. Heavy rains and floods will move fluids along steep slopes under the action of gravity after saturation and dilution of sandy and soft soil mountains. my country is one of the countries that are seriously threatened by debris flow disasters in the world. In order to minimize the losses caused by debris flow disasters, it is necessary to strengthen the research on early identification methods of debris flow. [0003] Throughout the development history of early identification methods of debris flow in my country, before the 1980s, it was mainly limited to the qualitative description of debris flow disaster identification, and the research was still in the initial stage. After t...

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Problems solved by technology

[0006] The debris flow geological disaster identification method based on remote sensing satellite images disclosed in this patent document, although terrain factors are taken into account, fails to combine the source of debris flow and hydraulic conditions well, and the source of debris has large uncertainties. The characteristics of the debris flow itself are constantly changing, and the debris flow source directly affects the accuracy of the debris flow discrimination results. Therefore, it cannot effectively identify the debris flow disaster after the earthquake, and cannot be used as a strong evidence for the monitoring and prevention of the debris flow disaster after the earthquake.

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