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A Method and Application of Debris Flow Hazard Classification after Strong Earthquake

A mudslide and hazard technology, applied in data processing applications, instruments, calculations, etc., can solve problems such as single rainfall characteristics and inability to classify mudslide hazards, and achieve the effect of improving the accuracy of classification

Active Publication Date: 2021-11-19
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The debris flow early warning method based on rainfall monitoring disclosed in this patent document establishes a corresponding model through historical rainfall data and calculates the corresponding critical threshold. It only judges whether a debris flow event can be caused by a single rainfall feature, and cannot accurately predict the debris flow. risk classification

Method used

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  • A Method and Application of Debris Flow Hazard Classification after Strong Earthquake
  • A Method and Application of Debris Flow Hazard Classification after Strong Earthquake

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for classifying the risk of debris flow after a strong earthquake, comprising the following steps:

[0042] a. Determine the basic parameters of potential debris flow basins through Google Earth or topographic maps: area A of debris flow basin formation, shape coefficient F of debris flow basin formation area, ditch length L of debris flow basin formation area, and vertical gradient J of trench bed formation area of ​​debris flow basin formation area;

[0043] b. On-site investigation to determine the average width W of the channel in the formation area of ​​the debris flow basin and the particle size D in the formation area of ​​the debris flow basin;

[0044] c. Calculate the risk judgment index S of the debris flow basin;

[0045] S=T 0.2 / G 0.38 Formula 1

[0046]Among them, S is the risk judgment index of the debris flow basin; T is the terrain factor of the debris flow basin, which is calculated by formula 2; G is the geological factor of the debris f...

Embodiment 2

[0057] A method for classifying the risk of debris flow after a strong earthquake, comprising the following steps:

[0058] a. Determine the basic parameters of potential debris flow basins through Google Earth or topographic maps: area A of debris flow basin formation, shape coefficient F of debris flow basin formation area, ditch length L of debris flow basin formation area, and vertical gradient J of trench bed formation area of ​​debris flow basin formation area;

[0059] b. On-site investigation to determine the average width W of the channel in the formation area of ​​the debris flow basin and the particle size D in the formation area of ​​the debris flow basin;

[0060] c. Calculate the risk judgment index S of the debris flow basin;

[0061] S=T 0.2 / G 0.38 Formula 1

[0062] Among them, S is the risk judgment index of the debris flow basin; T is the terrain factor of the debris flow basin, which is calculated by formula 2; G is the geological factor of the debris ...

Embodiment 3

[0075] A method for classifying the risk of debris flow after a strong earthquake, comprising the following steps:

[0076] a. Determine the basic parameters of potential debris flow basins through Google Earth or topographic maps: area A of debris flow basin formation, shape coefficient F of debris flow basin formation area, ditch length L of debris flow basin formation area, and vertical gradient J of trench bed formation area of ​​debris flow basin formation area;

[0077] b. On-site investigation to determine the average width W of the channel in the formation area of ​​the debris flow basin and the particle size D in the formation area of ​​the debris flow basin;

[0078] c. Calculate the risk judgment index S of the debris flow basin;

[0079] S=T 0.2 / G 0.38 Formula 1

[0080] Among them, S is the risk judgment index of the debris flow basin; T is the terrain factor of the debris flow basin, which is calculated by formula 2; G is the geological factor of the debris ...

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Abstract

The invention discloses a method for classifying the risk of debris flow after a strong earthquake, which belongs to the technical field of debris flow prevention and control engineering. Area A, shape factor F of the debris flow basin formation area, ditch length L of the debris flow basin formation area, and vertical gradient J of the gully bed formation area of ​​the debris flow basin formation area; Particle size D; c. Calculating the risk judgment index S of the debris flow basin; d. Judging the risk of the debris flow basin. By studying the terrain and geological characteristics of the debris flow formation area, the invention proposes a quantitative judgment method and index for the risk of the single ditch debris flow basin in the strong earthquake area, and improves the accuracy of the risk division of the debris flow.

Description

technical field [0001] The invention relates to the technical field of mud-rock flow prevention engineering, in particular to a method for classifying the risk of mud-rock flow after a strong earthquake and its application. Background technique [0002] Debris flow is a natural disaster that occurs in mountainous areas. After the mudslides occurred, the mudslides carried a large amount of sand, washed away cities and towns, destroyed farmland and forests, washed away bridges and roads, and blocked traffic. After the strong earthquake, a large number of landslides and collapses were induced in the strongly affected area of ​​the earthquake, which provided a large number of solid sources for the occurrence of later debris flows. Studies at home and abroad have shown that in areas affected by strong earthquakes, many debris flows often occur during the rainfall process after the earthquake, and sometimes they are group debris flows; the watersheds that were not originally debr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/26
CPCG06Q10/0635G06Q10/06393G06Q50/265
Inventor 余斌杨凌崴刘清华常鸣
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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