1. Use of terrestrial laser scanning for the characterization of retrogressive landslides in sensitive clay and rotational landslides in river banks
- Author
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Jaboyedoff, Michel, Demers, Denis, Locat, Jacques, Locat, Ariane, Locat, Pascal, Oppikofer, Thierry, Robitaille, Denis, and Turmel, Dominique
- Subjects
Landslides -- Environmental aspects -- Mechanical properties -- Models -- Canada ,Data entry -- Methods -- Technology application ,Lasers -- Usage ,Rivers -- Environmental aspects ,Clay -- Mechanical properties -- Environmental aspects ,Earth sciences ,Technology application ,Laser ,Usage ,Mechanical properties ,Models ,Methods ,Environmental aspects - Abstract
For more than 10 years, digital elevation models (DEM) produced by light detection and ranging (LIDAR) technology have provided new tools for geomorphologic studies and especially for landslide studies. In particular, terrestrial laser scanning (TLS) provides a great versatility of use. TLS can be used either for monitoring purposes or in an emergency situation that necessitates a rapid DEM acquisition for assessing a hazard. Using three examples we demonstrate the use fulness of TLS for landslide volume quantification, profile creation, and time series analysis. These case studies are landslides located in sensitive clays of eastern Canada (Quebec, Canada) or small rotational slides in river banks (Switzerland). Key words: aerial and terrestrial laser scanning, landslide, digital elevation models (DEM), sensitive clays, rotational slide. Depuis plus de 10 ans les modeles numeriques d'altitude (MNA) produits par technologie de << light detection and ranging >> (<< LIDAR >>) ont fourni de nouveaux outils tres utiles pour des etudes geomorphologiques, particulierement dans le cas des glissements de terrain. Le balayage laser terrestre (<< TLS >>) permet une utilisation tres souple. Le TLS peut etre employe pour la surveillance ou dans des situations d'urgence qui necessitent une acquisition rapide d'un MNA afin d'evaluer l'alea. Au travers de trois exemples, nous demontrons l'utilite du TLS pour la quantification de volumes de glissements de terrain, la creation de profils et l'analyse de series temporelles. Ces etudes de cas sont des glissements de terrain situes dans les argiles sensibles de l'est du Canada (Quebec, Canada) ou de petits glissements rotationnels dans les berges d'une riviere (Suisse). Mots-cles : balayage laser aerien et terrestre, glissement de terrain, modeles numeriques d'altitude (MNA), argiles sensibles, rotationel slide., Introduction Since the mid 1990s, light detection and ranging (LIDAR) techniques have been extensively used for topographic surveys in various regions. Data acquisition was first performed by airborne laser scanning [...]
- Published
- 2009