Coupling between hydrogeology and deformation of mountainous rock slopes: Insights from La Clapière area (southern Alps,France) |
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| Authors: | Yves Guglielmi Frédéric Cappa Stéphane Binet |
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| Institution: | 1. UMR 6526 Géosciences Azur, CNRS–UNSA–IRD–UPMC, 06560 Sophia Antipolis, France;2. EA 2642 Géosciences, université de Franche-Comté, 25030 Besançon, France |
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| Abstract: | Meteoric infiltration influence on large mountainous rock slopes stability is investigated by comparing hydrogeologic and gravitational structures from detailed mapping of the ‘La Clapière’ slope. The slope infiltrated waters are trapped in a perched aquifer that is contained in deposits inside tensile cracks of the upper part of the slope. Flow rates of 0.4 to 0.8 l?s?1 from the perched aquifer to the landslide cause landslide accelerations. Numerical modeling shows that a 0.75 l?s?1 infiltration yield increases conditions for toppling with failure through tilting of large rock volumes from the perched aquifer bottom down to the foot of the slope. To cite this article: Y. Guglielmi et al., C. R. Geoscience 337 (2005). |
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| Keywords: | Toppling Hydromechanical coupling Gravitational Modelling Long-term Basculement Couplage hydromécanique Gravitaire Modélisation Long terme |
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