Articles | Volume 15, issue 6
Research article
18 Jun 2015
Research article |  | 18 Jun 2015

Forest damage and snow avalanche flow regime

T. Feistl, P. Bebi, M. Christen, S. Margreth, L. Diefenbach, and P. Bartelt

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Cited articles

Baroudi, D., Sovilla, B., and Thibert, E.: Effects of flow regime and sensor geometry on snow avalanche impact-pressure measurements, J. Glaciol., 57, 277–288, 2011.
Bartelt, P. and Stöckli, V.: The influence of tree and branch fracture, overturning and debris on snow avalanche flow, Ann. Glaciol., 32, 209–216, 2001.
Bartelt, P., Feistl, T., Bühler, Y., and Buser, O.: Overcoming the stauchwall: Viscoelastic stress redistribution and the start of full-depth gliding snow avalanches, Geophys. Res. Lett., 39, L16501,, 2012a.
Bartelt, P., Glover, J., Feistl, T., Bühler, Y., and Buser, O.: Formation of levees and en-echelon shear planes during snow avalanche run-out, J. Glaciol., 58, 980–992, 2012b.
Bartelt, P., Buser, O., Bühler, Y., Dreier, L., and Christen, M.: Numerical simulation of snow avalanches: Modelling dilatative processes with cohesion in rapid granular shear flows, in: Numerical Methods in Geotechnical Engineering – Proceedings of the 8th European Conference on Numerical Methods in Geotechnical Engineering, NUMGE, 327–332, 2014.
Short summary
Snow avalanches break, uproot and overturn trees, causing damage to forests. In this paper, we define avalanche loading cases representing four different avalanche flow regimes: powder, intermittent, dry and wet. Using a numerical model that simulates both powder and wet snow avalanches, we study documented events with forest damage. We find that powder clouds with velocities over 20m/s break tree stems and that quasi-static pressures of wet snow avalanches are much higher than dynamic pressure.
Final-revised paper