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Calculation method for surge height of ice lake along with propagation distance and application thereof

A technology of propagation distance and calculation method, which is applied in the calculation field of ice lake swell height with propagation distance, can solve problems such as affecting the disaster prevention effect, not considering the swell propagation distance, etc., and achieve the effect of improving the disaster prevention effect.

Inactive Publication Date: 2020-02-25
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the relationship between the propagation distance of the swell and the water depth of the glacial lake is not considered, so it is impossible to fundamentally judge whether the glacial lake has collapsed, and it cannot provide corresponding evidence, which will affect the disaster prevention effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A calculation method of glacial lake swell height with propagation distance, comprising the following steps:

[0027] a. Obtain the initial height H of the swell when the ice avalanche body just entered the ice lake by monitoring and measuring at the end of the ice lake 0 , unit m;

[0028] b. Measure the distance x from different positions of the ice lake to the end of the ice lake, in m;

[0029] c. Determining the area A of the glacial lake through surveying and mapping measurement, unit m 2 , calculate the average water depth h of the glacial lake by formula 1, unit m;

[0030] h=0.104A 0.42 Formula 1

[0031] d. Calculate the swell height H at different positions in the ice lake by formula 2, in m;

[0032] H=H 0 [1-0.15(x / h) 0.3 ], formula 2

[0033] Among them, x is the distance from different locations of the ice lake to the end of the ice lake, in m; h is the average water depth of the ice lake, in m.

[0034] "a. Obtain the initial height H of the sw...

Embodiment 2

[0036]A calculation method of glacial lake swell height with propagation distance, comprising the following steps:

[0037] a. Obtain the initial height H of the swell when the ice avalanche body just entered the ice lake by monitoring and measuring at the end of the ice lake 0 , unit m;

[0038] b. Measure the distance x from different positions of the ice lake to the end of the ice lake, in m;

[0039] c. Determining the area A of the glacial lake through surveying and mapping measurement, unit m 2 , calculate the average water depth h of the glacial lake by formula 1, unit m;

[0040] h=0.104A 0.42 Formula 1

[0041] d. Calculate the swell height H at different positions in the ice lake by formula 2, in m;

[0042] H=H 0 [1-0.15(x / h) 0.3 ], formula 2

[0043] Among them, x is the distance from different locations of the ice lake to the end of the ice lake, in m; h is the average water depth of the ice lake, in m.

[0044] In the step b, the distance between differ...

Embodiment 3

[0047] A calculation method of glacial lake swell height with propagation distance, comprising the following steps:

[0048] a. Obtain the initial height H of the swell when the ice avalanche body just entered the ice lake by monitoring and measuring at the end of the ice lake 0 , unit m;

[0049] b. Measure the distance x from different positions of the ice lake to the end of the ice lake, in m;

[0050] c. Determining the area A of the glacial lake through surveying and mapping measurement, unit m 2 , calculate the average water depth h of the glacial lake by formula 1, unit m;

[0051] h=0.104A 0.42 Formula 1

[0052] d. Calculate the swell height H at different positions in the ice lake by formula 2, in m;

[0053] H=H 0 [1-0.15(x / h) 0.3 ], formula 2

[0054] Among them, x is the distance from different locations of the ice lake to the end of the ice lake, in m; h is the average water depth of the ice lake, in m.

[0055] In the step b, the distance between diffe...

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Abstract

The invention discloses a calculation method for the surge height of an ice lake along with the propagation distance, and belongs to the technical field of disaster prevention and control engineering.The calculation method is characterized by comprising the following steps: a, by means of ice lake tail end monitoring and measuring, the initial height H0 of surge formed when an ice fall body justenters the ice lake is obtained, the unit of H<0> is m; b, the distances x from different positions of the ice lake to the tail end of the ice lake are measured, and the unit of x is m; c, the area Aof the ice lake is determined through investigating, mapping and measuring, the unit of A is m<2>, and the mean water depth h of the ice lake is calculated through a formula 1, and the unit of h is m;and d, the surge heights H of the different positions in the ice lake are calculated through a formula 2, and the unit of H is m. Accordingly, by considering the surge propagation distance and the water depth of the ice lake, the more precise calculation method for the surge height when the ice fall forms the surge along with the propagation distance is established, a basis is provided for judging whether or not the ice lake outbursts, and the disaster prevention effect can be improved.

Description

technical field [0001] The invention relates to the technical field of disaster prevention and control engineering, in particular to a calculation method and application of ice lake swell height with propagation distance. Background technique [0002] After the ice avalanche occurs, the ice blocks move into the glacial lake, often forming huge swells, raising the water level of the glacial lake, triggering the collapse of the glacial lake, forming a glacial lake outburst debris flow, and then rushing into the downstream river, blocking the river, and then collapsing, forming secondary disaster chain. Therefore, ice avalanches may not only harm the range below the nearby hillsides, but may also affect the upstream and downstream of the river. Ice avalanches often occur due to the tension cracks at the upper edge of the front of the glacier. Under continuous tension, the front of the glacier is completely separated from the glacier body due to sudden changes in temperature, f...

Claims

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Application Information

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IPC IPC(8): G01C13/00
CPCG01C13/002Y02A90/30
Inventor 余斌李志斐杨凌崴
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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