Articles | Volume 23, issue 1
https://doi.org/10.5194/nhess-23-343-2023
https://doi.org/10.5194/nhess-23-343-2023
Research article
 | 
27 Jan 2023
Research article |  | 27 Jan 2023

Assessing the relationship between weather conditions and rockfall using terrestrial laser scanning to improve risk management

Tom Birien and Francis Gauthier

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Cited articles

Abellán, A., Oppikofer, T., Jaboyedoff, M., Rosser, N. J., Lim, M., and Lato, M. J.: Terrestrial laser scanning of rock slope instabilities, Earth Surf. Proc. Land., 39, 80–97, https://doi.org/10.1002/esp.3493, 2014. 
André, M. F.: Holocene rockwall retreat in Svalbard: a triple-rate evolution, Earth Surf. Proc. Land., 22, 423–440, https://doi.org/10.1002/(SICI)1096-9837(199705)22:5<423::AID-ESP706>3.0.CO;2-6, 1997. 
Badger, T. C. and Lowell, S. M.: Rockfall Control in Washington State, rockfall prediction and control and landslide case histories, Transp. Res. Rec., 1343, 14–19, 1992. 
Badoux, A., Andres, N., Techel, F., and Hegg, C.: Natural hazard fatalities in Switzerland from 1946 to 2015, Nat. Hazards Earth Syst. Sci., 16, 2747–2768, https://doi.org/10.5194/nhess-16-2747-2016, 2016. 
Ballantyne, C. K. and Kirkbride, M. P.: Rockfall activity in upland Britain during the Loch Lomond Stadial, Geogr. J., 153, 86–92, https://doi.org/10.2307/634474, 1987. 
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Short summary
On highly fractured rockwalls such as those found in northern Gaspésie, most rockfalls are triggered by weather conditions. This study highlights that in winter, rockfall frequency is 12 times higher during a superficial thaw than during a cold period in which temperature remains below 0 °C. In summer, rockfall frequency is 22 times higher during a heavy rainfall event than during a mainly dry period. This knowledge could be used to implement a risk management strategy.
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