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Risk judgment method for outburst of ice core-free moraine dam ice lake and application

A dangerous and ice core technology, applied in the field of debris flow prevention and control engineering, can solve the problems of lack of dangerous judgment of moraine lakes, achieve the effect of improving the prevention and control effect and ensuring the accuracy of judgment

Active Publication Date: 2018-11-02
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of them fully considered the relationship between the glacier and the glacier lake and the characteristics of the moraine embankment, especially the relationship between the potential glacier volume and the volume of the glacier lake, the proportional relationship between the area of ​​the glacier lake and the width and length of the moraine embankment, and the backwater of the moraine embankment. Therefore, there is a big lack of judgment on the danger of moraine lakes

Method used

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  • Risk judgment method for outburst of ice core-free moraine dam ice lake and application
  • Risk judgment method for outburst of ice core-free moraine dam ice lake and application
  • Risk judgment method for outburst of ice core-free moraine dam ice lake and application

Examples

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Comparison scheme
Effect test

Embodiment 1

[0063] A method for judging the risk of a non-ice core moraine embankment glacier lake burst, comprising the following steps:

[0064] a. Determine the moraine lake without ice core in the moraine embankment;

[0065] Distinguished by Google Earth images, if the surface is smooth and has layered curved ridge moraine banks, it is a moraine lake with an ice core; if there is a disproportionately large moraine bank in front of a small glacier, it is an ice core moraine lake with a core; if there is a narrow spire or a triangular moraine embankment in cross-section, it is a moraine lake without an ice core;

[0066] b. Determination of basic parameters of moraine lakes without ice cores by Google Earth;

[0067] Including the ice tongue slope α at the back edge of the glacier lake, the slope aspect θ of the mother glacier, the area F of the mother glacier, and the area A of the ice tongue S , the vertical height difference between the centroid of the glacier tongue and the glaci...

Embodiment 2

[0094] A method for judging the risk of a non-ice core moraine embankment glacier lake burst, comprising the following steps:

[0095] a. Determine the moraine lake without ice core in the moraine embankment;

[0096] Distinguished by Google Earth images, if the surface is smooth and has layered curved ridge moraine banks, it is a moraine lake with an ice core; if there is a disproportionately large moraine bank in front of a small glacier, it is an ice core moraine lake with a core; if there is a narrow spire or a triangular moraine embankment in cross-section, it is a moraine lake without an ice core;

[0097] b. Determination of basic parameters of moraine lakes without ice cores by Google Earth;

[0098] Including the ice tongue slope α at the back edge of the glacier lake, the slope aspect θ of the mother glacier, the area F of the mother glacier, and the area A of the ice tongue S , the vertical height difference between the centroid of the glacier tongue and the glaci...

Embodiment 3

[0128] A method for judging the risk of a non-ice core moraine embankment glacier lake burst, comprising the following steps:

[0129] a. Determine the moraine lake without ice core in the moraine embankment;

[0130] Distinguished by Google Earth images, if the surface is smooth and has layered curved ridge moraine banks, it is a moraine lake with an ice core; if there is a disproportionately large moraine bank in front of a small glacier, it is an ice core moraine lake with a core; if there is a narrow spire or a triangular moraine embankment in cross-section, it is a moraine lake without an ice core;

[0131] b. Determination of basic parameters of moraine lakes without ice cores by Google Earth;

[0132] Including the ice tongue slope α at the back edge of the glacier lake, the slope aspect θ of the mother glacier, the area F of the mother glacier, and the area A of the ice tongue S , the vertical height difference between the centroid of the glacier tongue and the glaci...

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Abstract

The invention discloses a risk judgment method for an outburst of an ice core-free moraine dam ice lake. The method is characterized by comprising the following steps of a, judging an ice core-free moraine lake in a moraine dam; b, determining a basic parameter of the ice core-free moraine lake through Google Earth; c, calculating a risk comprehensive discrimination factor G of the ice core-free moraine lake; and d, grading a risk level of the ice core-free moraine lake by satisfying the basic conditions that alpha is greater than 8 degrees, R is greater than 0.1 and V is greater than 0.75 incombination with the risk comprehensive discrimination factor G of the ice core-free moraine lake, the greater G value, the higher the risk is, and otherwise, the smaller G value, the lower the risk is. According to the risk judgment method for the outburst of an ice core-free moraine dam ice lake, an internal mechanism study is performed by analysis of each influence factor for an ice lake outburst generation process, an ice core-free moraine lake outburst risk calculation model is established, the risk level of the outburst of the ice core-free moraine lake is precisely graded in a quantitative manner, the judgment accuracy is guaranteed and the control effect is beneficially improved.

Description

technical field [0001] The invention relates to the technical field of debris flow prevention and control engineering, in particular to a method for judging the risk of a non-ice-cored moraine embankment glacier lake burst and its application. Background technique [0002] Ice and cement flow is a natural phenomenon that occurs in the distribution area of ​​alpine ice and snow. After the ice cement rock flow occurs, the debris flow moves to the downstream accumulation fan, destroying towns, destroying farmland and forests, destroying bridges and roads, and blocking traffic. Ice and cement flows often occur due to the rise of local temperature, the melting of ice and snow to form channel runoff, start the solid source in the channel, and form ice and cement flows. The formation of ice and cement flow requires two conditions: one is the terrain conditions that are conducive to the occurrence of ice and cement flow; the other is certain temperature conditions that lead to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 余斌范冬捷刘清华
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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