Definitions and Concepts for Quantitative Rockfall Hazard and Risk Analysis

There is an increasing need for quantitative rockfall hazard and risk assessment that requires a precise definition of the terms concepts used this particular type landslide. This paper suggests using appear to be most logic explicit as possible describes methods derive some main hazards descriptors. The presented concern process (failure, propagation, fragmentation, modelling) descriptors, distinguishing cases localized diffuse hazards. For hazard, failure probability considered rock compartment in given period time has assessed, element at impacted with energy must derived combining probability, reach exposure element. characterized by frequency, number rockfalls reaching per unit (passage frequency) can derived. frequency relevant when damaged several times. If it not replaced, least one more relevant.