High-Resolution DEM Extraction from Terrestrial LIDAR Topometry and Surface Kinematics of the Creeping Alpine Permafrost : The Laurichard Rock Glacier Case Study (Southern French Alps)

Abstract : The most common landforms associated with the creep of Alpine permafrost are the rock glaciers, the morphology of which reflects the complex processes of the internal deformation of the ice and debris mixture. In the present study, a terrestrial LIDAR device was employed to scan, at a sub-decimeter resolution, the surface of the Laurichard active rock glacier (Southern French Alps). Two points-clouds were generated at one-year interval (Sept. 2005 and Sept. 2006) and processed in order to produce two high-resolution digital elevation models (DEMs) and to compare them. Different methods were used in order to extract small-scale topography, quantify interannual surface changes, and determine the kinematic behavior of the creeping mass. For a better understanding of rock glacier dynamics, the results have also been compared to the geodetic measurements annually over a 20-year period, and to the geophysical evidences of rock glacier internal structure.
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Communication dans un congrès
Ninth International Conference on Permafrost, Jun 2008, Fairbanks, Alaska, United States. 1, pp.137-142, 2008
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https://hal.archives-ouvertes.fr/halsde-00575586
Contributeur : Charlotte Foray <>
Soumis le : jeudi 10 mars 2011 - 15:57:37
Dernière modification le : jeudi 11 janvier 2018 - 06:20:38

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  • HAL Id : halsde-00575586, version 1

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Xavier Bodin, Philippe Schoeneich, Stéphane Jaillet. High-Resolution DEM Extraction from Terrestrial LIDAR Topometry and Surface Kinematics of the Creeping Alpine Permafrost : The Laurichard Rock Glacier Case Study (Southern French Alps). Ninth International Conference on Permafrost, Jun 2008, Fairbanks, Alaska, United States. 1, pp.137-142, 2008. 〈halsde-00575586〉

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