The Internal Structure of Powder-Snow Avalanches
Open Access
- 1 January 1989
- journal article
- research article
- Published by International Glaciological Society in Annals of Glaciology
- Vol. 13, 207-210
- https://doi.org/10.1017/s0260305500007904
Abstract
The internal structure of powder-snow avalanches was investigated at Kurobe Canyon in the Shiai-dani area of Japan in 1988. Internal velocity was derived for avalanches of this kind by frequency analysis of impact-force data, and was found to undergo a remarkable change with time. The shear of the avalanche flow was estimated to range from 1 to 7 s−1. The front region of the avalanche wind was observed to precede the front of the avalanche by a distance of 17.3 m. The maximum wind velocity was comparable with the internal velocity of the front region of the avalanche.Keywords
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