France - Avalanche Testimonials Rhone Alpes - Geo.data France

Avalanche Phenomenon Map (CLPA) describes the areas where avalanches have occurred in the past and are represented by their extreme limits reached

The Location Map of Avalanche Phenomena is a descriptive map of observed or historical phenomena, intended to inform and educate the population on the existence, in mountain territory, of areas where avalanches have actually occurred in the past, represented by the extreme limits reached. The CLPA is an informative document that has no regulatory value and whose establishment is not subject to any prospective analysis. The CLPA is designed to inform everyone interested in the existence of avalanches in a given region. Technical document, it is particularly addressed to the Mayors and the administrative or technical services concerned with the problems of natural risks in mountain.

The CLPA includes a 1/25 000 map document supplemented by data sheets. The CLPA map represents three information themes: the result of a study on aerial photos (photo-interpretation and field analysis); the product of a collection of testimonies by inquiry; and, for information purposes, fixed protective devices. The collection of testimonies: an investigation, as exhaustive as possible, is conducted by a researcher of Irstea. It collects information from the local population, inhabitants and professionals, and from the documents that are made available (writings, photographs, reports, studies, newspapers, archives ...). The information thus collected makes it possible to delimit the footprints of the known avalanches (figured magenta). These avalanche rights of way are then numbered and accompanied by a data sheet that summarizes the information collected such as the location, history and operation of the avalanche, as well as all information provided by the testimony.