Method for calculating height of surge formed by ice-fall in consideration of characteristics of ice lake

Abstract

The invention discloses a method for calculating a height of a surge formed by an ice-fall in consideration of characteristics of an ice lake, and belongs to the field of disaster prevention engineering of a cold highland area. The method is characterized by comprising the steps of: distinguishing an attribute of an ice floe, and calculating a thickness D of a potential ice-fall body; determiningan elevation difference H0 between the ice-fall body and the lake surface of the ice lake, a distance J between the ice-fall body and the tail end of the ice lake, an ice lake tail end width b, an icelake tail end front ground surface slope P, an ice lake area Ag and an ice lake average water depth h; calculating the ice lake average water depth h by a formula 3; and calculating a height H of thesurge formed by the ice-fall in the ice lake by a formula 4. According to the method disclosed by the invention, by considering the topographic characteristics of a trailing edge of the ice lake, themorphological characteristics of the ice lake, a volume of the ice-fall body, the elevation difference between the ice-fall body and the ice lake and a position relationship between the ice-fall bodyand the ice lake, a more accurate formula of calculating the surge formed by the ice-fall in the ice lake is established, and scientific and reasonable bases are provided for judging whether the icelake is burst.

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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