A laboratory study of the retarding effects of braking mounds on snow avalanches

Kristín Martha Hákonardóttir*, Andrew J. Hogg, Tómas Jóhannesson, Gunnar G. Tómasson

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

44 Citations (Scopus)

Abstract

A series of laboratory experiments in a 6 m long chute using glass particles of mean diameter 100 μm were performed to investigate the interaction of a supercritical, granular flow with obstacles. It was found that the collision of the flow with a row of mounds led to the formation of a jet, whereby a large fraction of the flow was launched from the top of the mounds and subsequently landed back on the chute. The retarding effect of the mounds was investigated quantitatively by direct measurements of the velocity of the flow, its runout length and the geometry of the jet. The effects of several aspects of the layout of the mounds on their retarding effects were examined. It was observed that a row of steep mounds with an elongated shape in the transverse direction to the flow and with a height several times the flow depth led to dissipation of a large proportion of the kinetic energy of the flow.

Translated title of the contributionA laboratory study of the retarding effects of braking mounds on snow avalanches
Original languageEnglish
Pages (from-to)191-200
Number of pages10
JournalJournal of Glaciology
Volume49
Issue number165
Publication statusPublished - 1 Jan 2003

Bibliographical note

Other identifier: IDS number 771DW

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