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Conference Papers Year : 2013

Estimating rock fall frequency in a limestone cliff using LIDAR measurements

Abstract

Terrestrial Laser Scanner has been used to detect rock falls which have occurred in a limestone cliff during some years, in the difficult configuration of the Subalpine Chains. In a rock wall of width 750 m and height 200 m, 130 rock falls larger than 0.1 m3 have been detected for a period of 1180 days. The distribution of the rock fall volumes is well fitted by a power law, with an exponent which is compatible with the exponent found for the 120 km long cliffs of the Grenoble area. But the spatial-temporal frequencies given by the two analyses are very different. The number of rock falls larger than 1 m3, which occur per century and per hm2, is about 150 times larger for the bedded limestone of Sequanian stage than for the massive limestones of Tithonian and Barremian stages.

Domains

Applied geology
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Dates and versions

hal-00808577 , version 1 (05-04-2013)

Identifiers

  • HAL Id : hal-00808577 , version 1

Cite

Antoine Guerin, Jean-Pierre Rossetti, Didier Hantz, Michel Jaboyedoff. Estimating rock fall frequency in a limestone cliff using LIDAR measurements. First International Conference on Landslides Risk, Mar 2013, Tabarka, Tunisia. p. 293-301. ⟨hal-00808577⟩
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