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Earth Surface Dynamics An interactive open-access journal of the European Geosciences Union

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doi:10.5194/esurf-2017-6
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
30 Jan 2017
Review status
A revision of this discussion paper was accepted for the journal Earth Surface Dynamics (ESurf) and is expected to appear here in due course.
Automated Terrestrial Laser Scanning with Near Real-Time Change Detection – Monitoring of the Séchilienne Landslide
Ryan A. Kromer1,2, Antonio Abellan1,2,3, D. Jean Hutchinson2, Matt Lato2,5, Marie-Aurelie Chanut4, Laurent Dubois4, and Michel Jaboyedoff1 1Risk Analysis Group, University of Lausanne, Lausanne, Switzerland
2Geomechanics Group, Geological Sciences and Geological Engineering, Queen’s University, Kingston, Ontario
3Scott Polar Research Institute, University of Cambridge, Cambridge, UK
4Groupe Risque Rocheux et Mouvements de Sols (RRMS), Cerema Centre-Est, France
5BGC Engineering, Ottawa, Canada
Abstract. We present an Automated Terrestrial Laser Scanning (ATLS) system with automatic near real-time change detection processing. The ATLS system was tested on the Séchilienne Landslide in France for a six-week period with data collected at 30 minute intervals. The purpose of developing the system was to fill the gap of high temporal resolution TLS monitoring studies of earth surface processes and to offer a cost effective, light, portable alternative to GB-InSAR deformation monitoring. During the study, we detected the flux of talus, displacement of the landslide and pre-failure deformation of discrete rockfall events. We also defined a distance spatio-temporal confidence interval and achieved measurement confidence at 95 % that varied between 2 to 10 mm at target scanner distances greater than 1000 m. Additionally, we found the ATLS system is still an effective tool in monitoring landslide and rockfall processes despite missing points due to poor atmospheric conditions or rainfall. Furthermore, such a system has the potential to help us better understand a wide variety of slope processes at high levels of temporal detail.

Citation: Kromer, R. A., Abellan, A., Hutchinson, D. J., Lato, M., Chanut, M.-A., Dubois, L., and Jaboyedoff, M.: Automated Terrestrial Laser Scanning with Near Real-Time Change Detection – Monitoring of the Séchilienne Landslide, Earth Surf. Dynam. Discuss., doi:10.5194/esurf-2017-6, in review, 2017.
Ryan A. Kromer et al.
Ryan A. Kromer et al.

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Short summary
We developed and tested an Automated Terrestrial Laser Scanning (ATLS) system with near real-time change detection at the Séchilienne Landslide. We monitored the landslide for a 6 week period collecting a point cloud every 30 minutes. We detected various slope processes including movement of scree material, pre-failure deformation of discrete rockfall events and deformation of the main landslide body. This system allows the study of slope processes a high level of temporal detail.
We developed and tested an Automated Terrestrial Laser Scanning (ATLS) system with near...
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