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A. Preh, J.T. Sausgruber:
"The Extraordinary Rock-Snow Avalanche of Alpl, Tyrol, Austria. Is it Possible to Predict the Runout by Means of Single-phase Voellmy- or Coulomb-Type Models?";
Talk: XII International IAEG Congress, Torino, Italy; 2014-09-15 - 2014-09-19; in: "Engineering Geology for Society and Territory - Volume 2, Landslides", G. Lollino et al. (ed.); Springer International Publishing, Volume 2 (2014), ISBN: 978-3-319-09056-6; 1907 - 1911.

On March 22nd, 2012, the Central Institute for Meteorology and Geodynamics Austria registered 7 min before midnight a seismic event with a magnitude of 1.4, which was caused by a rock slide in a mountainous region in Tyrol, Austria, some 33 km west of Innsbruck. Interestingly, this event had an extraordinary runout of 2.6 km, representing an angel of reach (fahrböschung) of only 17.8°. This is explained by rock mass sliding on old snow, which extremely promoted the mobility of the process. The rock-snow avalanche was analyzed by means of the continuum numerical models DAN and DAN3D. The purpose of the study was to verify, if the relative simple single-phase Voellmy- or Coulomb-type models used are capable to simulate the behavior of complex rock-snow avalanches, where two phases-rock (solid) and snow (fine particles)-are involved.

Rock-snow avalanche, Runout analysis, Tyrol, Voellmy rheology, Dynamic analysis (DAN)

http://dx.doi.org/10.1007/978-3-319-09057-3_338