A Calculation Method for Swell Height of Ice Avalanche Considering the Characteristics of Glacier Lake

Abstract

The invention discloses a calculation method for the surge height formed by ice avalanches considering the characteristics of ice lakes, which belongs to the field of disaster prevention and control engineering in alpine mountainous areas, and is characterized in that: identifying the attributes of glaciers, calculating the thickness D of potential ice avalanche bodies; determining the ice avalanche The elevation difference H between the body and the surface of the glacial lake 0 , the distance J between the ice avalanche body and the end of the ice lake, the width b of the end of the ice lake, the slope P of the surface before the end of the ice lake, the area Ag of the ice lake, and the average water depth h of the ice lake; the average water depth h of the ice lake is calculated by formula 3; Equation 4 calculates the surge height H formed by the ice avalanche in the ice lake. The present invention establishes a more accurate ice avalanche by considering the terrain characteristics of the trailing edge of the ice lake, the morphological characteristics of the ice lake, the volume of the ice avalanche body, the height difference between the ice avalanche body and the ice lake, and the positional relationship between the ice avalanche body and the ice lake. The swell calculation formula formed in the glacial lake provides a scientific and reasonable basis for judging whether the glacial lake has collapsed.

Description

technical field [0001] The invention relates to the field of disaster prevention and control engineering in alpine mountainous areas, in particular to a method for calculating the height of swell waves formed by ice avalanches considering the characteristics of ice lakes. Background technique [0002] 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, forming an ice avalanche. Rainfall can also exacerbate these avalanches. The front edge of some glaciers has already entered the top of the ice lake. Once an ice avalanche occurs, the ice avalanche will directly fall vertically into the ice lake. Landslides, landslides, mudslides, avalanches or glacial movements can generate swell waves when they enter water and impact oceans, bays, rivers, lakes and reservoir areas. This type of wave is aperiod...

AI Technical Summary

Problems solved by technology

However, since the volume of the ice avalanche body, the height difference with the ice lake, and the water depth of the ice lake are not taken into account, the surge waves formed by the vertical fall of the ice avalanche in the ice lake cannot be accurately calculated, so it is impossible to fundamentally judge whether the ice lake has collapsed. Can not provide the corresponding basis

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