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Record #125441:

Flow, flow transition and runout distances of flowing avalanches / Bruno Salm.

Title: Flow, flow transition and runout distances of flowing avalanches / Bruno Salm.
Author(s): Salm, Bruno.
Date: 1993.
In: Annals of Glaciology. (1993.), Vol. 18 (1993)
Abstract: Presents simple quasi one-dimensional model of flowing avalanches, developed from that used in Swiss Guidelines for practitioners (Salm and co-workers, 1990). Shows that shearing is concentrated near ground and that, due to geometrical roughness of ground, flow resistence proportional to square of velocity must be taken into account in addition to dry friction. For change of flow on changing slope angles, it is demonstrated that in certain conditions for internal friction, "normal" flow on flat lower part cannot be attained and avalanche behaves like rigid body. Runout distance is in fair agreement with Guidelines if larger internal friction is used; main differences lie in much smaller deposition depths and smaller velocities during runout.
Notes:

Annals of Glaciology. Vol. 18 :221-226 (1993).

Keywords: 551.578.46 -- Snow cover and snow patches.
551.578.482 -- Avalanches. Theory, causes.
519.673 -- Modelling.
E10 -- Glaciology: snow and avalanches.
SPRI record no.: 125441

MARCXML

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500 ## ‡aAnnals of Glaciology. Vol. 18 :221-226 (1993).
520 3# ‡aPresents simple quasi one-dimensional model of flowing avalanches, developed from that used in Swiss Guidelines for practitioners (Salm and co-workers, 1990). Shows that shearing is concentrated near ground and that, due to geometrical roughness of ground, flow resistence proportional to square of velocity must be taken into account in addition to dry friction. For change of flow on changing slope angles, it is demonstrated that in certain conditions for internal friction, "normal" flow on flat lower part cannot be attained and avalanche behaves like rigid body. Runout distance is in fair agreement with Guidelines if larger internal friction is used; main differences lie in much smaller deposition depths and smaller velocities during runout.
650 07 ‡a551.578.46 -- Snow cover and snow patches.‡2udc
650 07 ‡a551.578.482 -- Avalanches. Theory, causes.‡2udc
650 07 ‡a519.673 -- Modelling.‡2udc
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