Global monitoring strategy applied to ground failure hazards
Résumé
Risk management of natural ground failures or those of anthropogenic origin by means of operational monitoring requires the setting-up of performing early-warning systems. The goal is to sufficiently anticipate the natural catastrophe, unpredictable in time, and thereby guarantee acceptance of the risks by effective reduction in the vulnerability, including the case of multiple risks and of domino effects. Beyond in-depth hazard assessment study, in terms of mechanisms and scenarios, the early-warning system should allow quasi real-time integration of the factors identified as worsening, precursory and triggering factors, to which are added specific monitoring of the dreaded hazard and that of the most vulnerable stakes. Such a global monitoring strategy and the resulting technological choices to be deployed, developed by the CENARIS, at INERIS, are explained and illustrated by means of concrete examples.