Evaluation method of debris flow disaster hazard classification in glacier distribution areas

Abstract

The invention discloses an evaluation method of debris flow disaster hazard classification in glacier distribution areas, the method comprises the following steps:1) determining the index used for describing the conventional factors affecting the debris flow development, and classifying; 2) calculating the weight sum of the conventional impact factors of debris flow, and getting the debris flow hazard value under no impact of glacier, and classifying and partitioning; 3) analyzing the impact of glacier distribution and movements on debris flow development, determining the index for describing the glacier impact, and classifying; 4) determining the relative importance value of the glacier factors relative to the conventional factors; 5) calculating the weight sum of the conventional factors and the sum of the glacier impact factors multiply by the relative importance thereof, classifying, and completing the debris flow hazard of the glacier distribution area. The evaluation method of debris flow disaster hazard classification in glacier distribution areas provided is on the basis of the traditional debris flow hazard evaluation method for general area and superposes the glacier impact factors, which is applicable for classification of debris flow hazard evaluation in the glacier distribution areas.

Description

technical field [0001] The invention relates to a method for grading and evaluating the risk of geological disasters, in particular to a method for grading and evaluating the risk of debris flow disasters in glacier distribution areas. Background technique [0002] More than 90% of debris flows are triggered by rainfall, so the general assessment of debris flow hazard classification is mostly aimed at rainstorm-type debris flows. However, the development and stimulation of debris flows in glacier distribution areas are obviously affected by glacier activities, which are quite different from debris flows in non-glacial areas, mainly as follows: [0003] 1. During the movement of glaciers, they erode valleys and transport a large amount of solid matter downstream, forming landforms such as moraines after melting, which not only provide sufficient source conditions for debris flows, but also through the formation of landforms such as moraines. The erosion and accumulation prod...

AI Technical Summary

Problems solved by technology

[0005] In view of this, there are few studies on the risk classification and evaluation of debris flow disasters in glacier distribution areas.

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