Preprint Review Version 1 Preserved in Portico This version is not peer-reviewed

Definitions and Concepts for Quantitative Rockfall Hazard and Risk Analysis

Version 1 : Received: 21 February 2021 / Approved: 23 February 2021 / Online: 23 February 2021 (14:23:02 CET)

A peer-reviewed article of this Preprint also exists.

Hantz, D.; Corominas, J.; Crosta, G.B.; Jaboyedoff, M. Definitions and Concepts for Quantitative Rockfall Hazard and Risk Analysis. Geosciences 2021, 11, 158. Hantz, D.; Corominas, J.; Crosta, G.B.; Jaboyedoff, M. Definitions and Concepts for Quantitative Rockfall Hazard and Risk Analysis. Geosciences 2021, 11, 158.

Abstract

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

Keywords

rockfall; failure; propagation; hazard; risk; probability; frequency

Subject

Environmental and Earth Sciences, Atmospheric Science and Meteorology

Comments (0)

Comment 1
Received: 2 March 2021
Commenter: Axel Volkwein
The commenter has declared there is no conflict of interests.
Comment: Dear Didier, Jordi, Giovanni and Michel,

thank you for this preprint. I am happy that there is a new reivew article on rockfall.

Short layout-comment: The references 1-3 appear twice in the reference list.
The references 28 & 29 are identical


Best regards,
Axel
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