Accession Number : AD0720077

Title :   Air Wave Accompanying a Snow Avalanche,

Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H

Personal Author(s) : Matveev,S. N.

Report Date : 1971

Pagination or Media Count : 21

Abstract : It is known that during the descent of avalanches there occurs a sudden hurrican-like gust of wind moving ahead of the Flaig. Light buildings fly apart like cardboard houses long before they are reached by the snow masses of the powdery avalanche, usually of comparatively small size. In some cases the destructive effect of the snow masses themselves is slight, while the air masses induced into motion by the descending avalanche cause tremendous destruction. The author concludes that the air wave is caused by a sharp, sudden compression of the air during the free fall of the masses (both snow and rock) and, the free fall of snow masses, which is a precursor of the genesis of an air wave with avalanches, occurs in the case when the avalanche stream breaks off from a ledge. (Author)

Descriptors :   (*AVALANCHES, *GUSTS), AIR, MOTION, STRUCTURES, PROPAGATION, THEORY, SNOW, DAMAGE, USSR

Subject Categories : Snow, Ice and Permafrost

Distribution Statement : APPROVED FOR PUBLIC RELEASE