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Application of a Terrestrial Laser Scanner (TLS) to the Study of the Séchilienne Landslide (Isère, France)
Centre d‘Études Techniques de l‘Equipement de Lyon, 25 avenue François Mitterrand Case n 1 69674 Bron Cedex, France
IUEM-UBO, Domaines Océaniques, UMR6538, Place Copernic, 29280 Plouzane, France
Université de Lyon, Université Lyon 1 ENS-Lyon et CNRS, Laboratoire de Sciences de la Terre, UMR 5570, 2 rue Raphaël Dubois, 69622 Villeurbanne cedex, France
ATM3D, 16 avenue du Midi 30111 Congenies, France
* Author to whom correspondence should be addressed.
Received: 7 October 2010; in revised form: 7 December 2010 / Accepted: 8 December 2010 / Published: 17 December 2010
(This article belongs to the Special Issue LiDAR
Abstract: The active Séchilienne landslide (Isère, France) has been continuously monitored by tacheometry, radar and extensometry devices for 25 years. Indeed, if the 3 mil. m3 of rocks in the active zone named ―Ruines‖ fell down, the debris would dam the Romanche valley. The breaking of the dam by overtopping and rapid erosion would bring a catastrophic flood and other dramatic consequences throughout the valley. Given the rockfall hazard in the most active zone, it is impossible to use targets in this area: Only reflectorless remote sensing techniques can provide information. A time-series of seven Terrestrial Laser Scanner (TLS) point clouds acquired between 2004 and 2007 enable us to monitor the 3D displacements of the whole scanned area, although point coverage is not homogeneous. From this sequential monitoring, the volume of registered collapses can be deduced and the landslide movement along the main geological structures can be inferred. From monitoring associated subsidence and toppling observed on TLS data, it can be deduced that blocks rearrangements are linked to structural settings and that the Séchilienne landslide is complex. To conclude, TLS point clouds enable an accurate monitoring of the evolution of the inaccessible "Ruines" area and, proven its ability to provide reliable kinematic information, even in areas where on-site instrumentation is infeasible.
Keywords: landslide; Séchilienne; terrestrial laser scanner
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Kasperski, J.; Delacourt, C.; Allemand, P.; Potherat, P.; Jaud, M.; Varrel, E. Application of a Terrestrial Laser Scanner (TLS) to the Study of the Séchilienne Landslide (Isère, France). Remote Sens. 2010, 2, 2785-2802.
Kasperski J, Delacourt C, Allemand P, Potherat P, Jaud M, Varrel E. Application of a Terrestrial Laser Scanner (TLS) to the Study of the Séchilienne Landslide (Isère, France). Remote Sensing. 2010; 2(12):2785-2802.
Kasperski, Johan; Delacourt, Christophe; Allemand, Pascal; Potherat, Pierre; Jaud, Marion; Varrel, Eric. 2010. "Application of a Terrestrial Laser Scanner (TLS) to the Study of the Séchilienne Landslide (Isère, France)." Remote Sens. 2, no. 12: 2785-2802.