Mesure de la fréquentation d’itinéraires d’accès à la haute montagne dans le massif du Mont Blanc à l’aide de capteurs pyroélectriques

Abstract

Global warming effects on high mountain environments are more and more affecting mountaineering routes. In order to better quantify and characterise the vulnerability of mountaineering as a result of those effects, pyroelectric sensors have been installed at three of the main access to high mountain of the Mont-Blanc massif. However, due to the specific conditions in which they have been installed, important limits and constraints must be taken into account to insure the effectiveness of the sensors and the data analysis. In our case, the mounting systems had to be adapted to the local specificities of the terrain and the sensors had to be set in a particular measurement mode of unite counting. However, the specificities of the terrains in which they have been installed and the specific mountaineers’ way of walking lead to important and variable measurement errors. Also, information will be acquired but the mountaineers flux will not be quantified and characterized with the expected accuracy.