Quelques réflexions autour de la classification des avalanches / Some thoughts on a classification of avalanches

Abstract

Abstract : This paper attempts to provide a reliable classification of avalanches. After outlining the development of current terminology, the authors draw attention to the fact that usual classifications, which divide avalanches into slab, powder and loose-snow avalanches are rather inconvenient to use and crude. A number of proposals are therefore made for a more reliable classification. Three main groups of avalanches are identified based on the type of flow : aerosol, dense, and mixed avalanches. Analysis of avalanche starting and stopping phases and consideration of the avalanche site provide further criteria for subdividing groups into sub-groups. Genetic factors are found to be helpful in completing descriptions but are to use in classifications.