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An early identification method of glacial lake outburst and its application

An early identification and glacier technology, applied in special data processing applications, design optimization/simulation, etc., can solve the problems of low early warning accuracy, poor applicability, and failure to consider whether ice avalanches can reach the ice lake, etc., and achieve early identification accuracy , high applicability effect

Active Publication Date: 2021-02-12
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The glacial lake outburst early warning method disclosed in this patent document studies the internal mechanism of the glacial lake outburst occurrence degree by studying temperature factors and topographical factors, and establishes a glacial lake outburst early warning and forecast model; however, this method only considers glacier collapse, In turn, it may cause the glacier lake to collapse. It has not considered whether the ice avalanche can reach the ice lake; whether the volume of the ice avalanche is large enough. Therefore, its early warning accuracy is low and its applicability is poor.

Method used

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  • An early identification method of glacial lake outburst and its application
  • An early identification method of glacial lake outburst and its application

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Embodiment 1

[0045] An early identification method of a glacier lake outburst, comprising the following steps:

[0046] a. Determine the basic glacier data of the collapsing glacier lake and the surrounding unbursting glacier lake through Google Earth, including the ice tongue slope α at the back edge of the glacier lake, the slope aspect θ of the glacier, the vertical height H from the center of mass of the potential glacier body to the glacier lake, and the potential glacier The straight-line distance L from the mass center of the collapse mass to the ice lake, the width of the breach b, the thickness T of the breach, and the width w of the ice lake before the collapse 0 , the length-to-width ratio C of the glacial lake before the outburst, the slope β on the bank of the glacial lake before the outburst, and the area F of the continuous glacier;

[0047] b. There are two prerequisites for determining the occurrence of a glacier lake collapse. One is the ratio of the vertical height H fro...

Embodiment 2

[0062] An early identification method of a glacier lake outburst, comprising the following steps:

[0063] a. Determine the basic glacier data of the collapsing glacier lake and the surrounding unbursting glacier lake through Google Earth, including the ice tongue slope α at the back edge of the glacier lake, the slope aspect θ of the glacier, the vertical height H from the center of mass of the potential glacier body to the glacier lake, and the potential glacier The straight-line distance L from the mass center of the collapse mass to the ice lake, the width of the breach b, the thickness T of the breach, and the width w of the ice lake before the collapse 0 , the length-to-width ratio C of the glacial lake before the outburst, the slope β on the bank of the glacial lake before the outburst, and the area F of the continuous glacier;

[0064] b. There are two prerequisites for determining the occurrence of a glacier lake collapse. One is the ratio of the vertical height H fro...

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Abstract

The invention discloses an early identification method of a glacier lake outburst, comprising the following steps: a. determining the basic glacier data of the outburst glacial lake and surrounding unbursted glacial lakes; b. determining the prerequisites for a glacier lake outburst. The ratio of the vertical height H from the center of mass of the avalanche to the ice lake and the straight-line distance L from the center of mass of the potential avalanche to the ice lake is greater than or equal to 0.125; 1 Greater than the critical water level H of glacial lake outburst 2 ; c. Calculation of glacier comprehensive discriminant factor S for glacial lake outburst; d. When S > 0.53, the risk is high; when 0.38 < S ≤ 0.53, the risk is medium; when S ≤ 0.38, the risk is low. The present invention conducts internal mechanism research on the occurrence degree of glacial lake outbursts through terrain factors, establishes a calculation model for glacial lake outbursts, comprehensively considers the terrain influencing factors of glacial lake outbursts, and accurately divides glacial lake outburst risk areas in a quantitative manner. Strong.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to an early identification method of a glacial lake outburst and its application. Background technique [0002] Glacial lake outburst is a natural phenomenon that occurs in the distribution area of ​​alpine glaciers. Glacial lake outbursts often occur due to ice avalanches or ice landslides occurring on glaciers backed by ice lakes. When ice avalanches or ice landslides enter the ice lakes, the water level of the ice lakes rises, resulting in ice lake outbursts. The occurrence of ice avalanches or ice landslides needs to meet two conditions: first, the glacier conditions, glacial lake conditions, and the relationship conditions between glaciers and ice lakes that are conducive to ice avalanches or ice landslides; second, certain temperature conditions lead to Cracks are generated inside the glacier and eventually lead to ice avalanches or ice slides, which are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 余斌范冬捷刘清华
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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