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 Jaboyedoff11Risk 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
Received: 23 Jan 2017 – Accepted for review: 23 Jan 2017 – Discussion started: 30 Jan 2017
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.
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.