Rockfall Hazard and Risk Assessment: The Promontory of the Pre-Hellenic Village Castelmola Case, North-Eastern Sicily (Italy)

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 using terms that appear to be the most logic and explicit as possible and describes methods to derive some of the main hazards 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 and diffuse 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 reach 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 (passage frequency) can be derived. This frequency is relevant for risk assessment when the element at risk can be damaged several times. If it is not replaced, the probability that it is impacted by at least one rockfall is more relevant.

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Comparing rockfall hazard and risk assessment procedures along roads for different planning purposes

Journal of Mountain Science ◽

10.1007/s11629-019-5766-3 ◽

2020 ◽

Vol 17 (3) ◽

pp. 653-669 ◽

Cited By ~ 4

Author(s):

Simone Mineo

Keyword(s):

Risk Assessment ◽

Rockfall Hazard ◽

Hazard And Risk ◽

Hazard And Risk Assessment ◽

Assessment Procedures

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Integrated rockfall hazard and risk assessment along highways: An example for Jiuzhaigou area after the 2017 Ms 7.0 Jiuzhaigou earthquake, China

Journal of Mountain Science ◽

10.1007/s11629-018-5355-x ◽

2019 ◽

Vol 16 (6) ◽

pp. 1318-1335 ◽

Cited By ~ 5

Author(s):

Xiao-ning Li ◽

Si-xiang Ling ◽

Chun-wei Sun ◽

Jian-xiang Xu ◽

Tao Huang

Keyword(s):

Risk Assessment ◽

Jiuzhaigou Earthquake ◽

Rockfall Hazard ◽

Hazard And Risk ◽

Hazard And Risk Assessment

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Rockfall hazard and risk assessment on forested slopes, examples from Czechia

Geografie ◽

10.37040/geografie2011116020144 ◽

2011 ◽

Vol 116 (2) ◽

pp. 144-155 ◽

Cited By ~ 1

Author(s):

Jan Klimeš

Keyword(s):

Risk Assessment ◽

Quantitative Risk Assessment ◽

Forest Composition ◽

Protective Function ◽

One Dimensional ◽

Rockfall Hazard ◽

Hazard And Risk ◽

Hazard And Risk Assessment ◽

The Village ◽

Forest Conditions

Rockfall hazard is assessed using Rockfor.net, which is one dimensional tool for assessing the protective function of forests against rockfall. Three sites where chosen to test the tool with different morphological and forest conditions. For each site, it was evaluated how the boulder size and forest composition affects the probability of the rocks to surpass the forested slope. The Rockfor.net was also used for back calculations of past event, which happened during the floods in July 1997 in the village of Bystřička in the Vsetínské vrchy Hills. In this case, also a partial quantitative risk assessment with suggestions for risk management was performed.

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Rockfall hazard and risk assessment of road slopes.

Bulletin of the Geological Society of Greece ◽

10.12681/bgsg.11031 ◽

2013 ◽

Vol 47 (4) ◽

pp. 1664 ◽

Cited By ~ 4

Author(s):

A. Andrianopoulos ◽

H. Saroglou ◽

G. Tsiambaos

Keyword(s):

Risk Assessment ◽

Hazard Assessment ◽

Weather Conditions ◽

Quantitative Risk Assessment ◽

Rockfall Hazard ◽

Traffic Conditions ◽

Hazard And Risk ◽

Trajectory Models ◽

Hazard And Risk Assessment ◽

National Road

This paper presents and compares the main methods of hazard and risk assessment for road slopes. Hazard assessment is achieved by rating several parameters such as the slope’s geometry, traffic conditions, the geology and the rockmass properties, weather conditions, historical rockfall data etc. A hazard assessment can also be executed using 2D or 3D trajectory models, by combining the frequency of a rockfall and the kinetic energy of a falling rock. Several methodologies have been developed for risk assessment, varying from simplistic approaches to comprehensive probabilistic or quantitative risk assessment methods. Finally, the most suitable methods were used in order to assess the level of hazard and risk as an example (the data from two sections of the national road at Tempi Gorge, Greece) where many rockfall events occurred in the past few years.

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