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Early recognition method of glacier lake outburst and application of early recognition method

An early identification and glacier technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as poor applicability, low early warning accuracy, and no consideration of whether the avalanche body can reach the ice lake. Applicability, early identification of accurate effects

Active Publication Date: 2018-03-09
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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  • Early recognition method of glacier lake outburst and application of early recognition method
  • Early recognition method of glacier lake outburst and application of early recognition method

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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 glacier 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 glacier 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 recognition method of glacier lake outburst. The method comprises steps as follows: a, basic glacier data of an outburst glacier and a peripheral non-outburst glacierare determined; b, preconditions for glacier lake outburst are determined, wherein 1) the ratio r of the vertical height H between a potential ice avalanche mass center and the glacier to the linear distance L between the potential ice avalanche body mass center and the glacier is larger than or equal to 0.125, and 2) the rising water level H1 caused by the fact that an ice avalanche body slides into the glacier is larger than the critical water level H2 of glacier lake outburst; c, a synthetic glacier discrimination factor S for glacier lake outburst is calculated; d, when S is larger than 0.53, the risk is high; when S is larger than 0.38 and smaller than or equal to 0.53, the risk is medium; when S is smaller than or equal to 0.38, the risk is low. The internal mechanism is studied about the glacier lake outburst degree through topographical factors, a glacier lake outburst probability calculation model is established, topographic influence factors of glacier lake outburst are comprehensively considered, the glacier lake outburst risk area is precisely divided in a quantitative manner, and the adaptability is high.

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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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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