Brief communication"Estimating rockfall frequency in a mountain limestone cliff using terrestrial laser scanner"
A. Guerin1,2, D. Hantz1,2, J.-P. Rossetti1,2, and M. Jaboyedoff31Univ. Grenoble Alpes, ISTerre, 38041 Grenoble, France 2CNRS, ISTerre, 38041 Grenoble, France 3Centre de Recherche sur l'Environnement Terrestre, Université de Lausanne, Switzerland
Received: 29 Nov 2013 – Accepted for review: 17 Dec 2013 – Discussion started: 07 Jan 2014
Abstract. Using terrestrial laser scanner, 344 rockfalls larger than 0.05 m3 have been detected for a period of 1180 days, in a thinly bedded limestone cliff of width 750 m and height 200 m. The complementary cumulative distribution of the rockfall volume is well fitted by a power law, with an exponent b of 0.75 ± 0.04. In order to compare the rockfall frequencies in different geological contexts, a rockfall activity parameter has been defined, which is the number of rockfalls larger than 1 m3, which occur per century and per hm2.
Guerin, A., Hantz, D., Rossetti, J.-P., and Jaboyedoff, M.: Brief communication"Estimating rockfall frequency in a mountain limestone cliff using terrestrial laser scanner", Nat. Hazards Earth Syst. Sci. Discuss., 2, 123-135, doi:10.5194/nhessd-2-123-2014, 2014.