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Communication Dans Un Congrès Année : 2013

Estimating rock fall frequency in a limestone cliff using LIDAR measurements

Résumé

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.
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Dates et versions

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

Identifiants

  • HAL Id : hal-00808577 , version 1

Citer

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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