Development and calibration of a preliminary cellular automata model for snow avalanches

Authors:
Maria Vittoria Avolio;Alessia Errera;Valeria Lupiano;Paolo Mazzanti;Salvatore Di Gregorio
Affiliations:
Univ. of Calabria, Dept. of Mathematics & Center of High-Performance Computing, Rende, CS, Italy;eni, San Donato Milanese, Italy;Univ. of Calabria, Dept. of Earth Sciences, Rende, CS, Italy;NHAZCA S.r.l., spin-off "Sapienza Università di Roma", Roma, Italy and Univ. of Rome "Sapienza", Dept. of Earth Sciences, Roma, Italy;Univ. of Calabria, Dept. of Mathematics & Center of High-Performance Computing, Rende, CS, Italy
Venue:
ACRI'10 Proceedings of the 9th international conference on Cellular automata for research and industry
Year:
2010

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Abstract

Numerical modelling is a major challenge in the prevention of risks related to the occurrence of catastrophic phenomena. A Cellular Automata methodology was developed for modelling large scale (extended for kilometres) dangerous surface flows of different nature such as lava flows, pyroclastic flows, debris flows, rock avalanches, etc. This paper presents VALANCA, a first version of a Cellular Automata model, developed for the simulations of dense snow avalanches. VALANCA is largely based on SCIDDICA-SS2, the most advanced model of the SCIDDICA family developed for flow-like landslides. VALANCA adopts several of its innovations: outflows characterized by their mass centre position and explicit velocity. First simulations of real past snow avalanches occurred in Switzerland in 2006 show a satisfying agreement, concerning avalanche path, snow cover erosion depth and deposit thickness and areal distribution.