Friction coefficients and speed of flowing avalanches

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Pages425432; # of pages: 8
Subjectavalanches; speed; coefficient of friction; vitesse; coefficient de frottement
AbstractObservations were made of the speed of avalanches by timing the advance of their front over a section of track covered with deep snow. The track under observation had uniform incline and cross-section, and the avalanches could be assumed to have constant mass and a uniform flowing motion. The observed speeds u could best be expressed by u[2]=1420R( sin alpha - f cos alpha) with R the hydraulic radius and alpha the inclination of the track. The coefficient of kinetic friction f was found to be dependent primarily on the speed. Tables are presented for estimating the depth and density of the flowing snow from observations of the avalanche snow after it comes to rest.
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AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number15189
NPARC number20374129
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Record identifier1d89f442-5be5-4c1c-bf84-ff3877e07189
Record created2012-07-23
Record modified2016-05-09
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