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Monitoring of high alpine mass movements combining laser scanning with digital airborne photogrammetry

  • Kenner, R. WSL Institute for Snow and Avalanche Research SLF, Davos Dorf, Switzerland
  • Bühler, Y. WSL Institute for Snow and Avalanche Research SLF, Davos Dorf, Switzerland
  • Delaloye, Reynald University of Fribourg, Department of Geosciences, Geography Unit, Switzerland
  • Ginzler, C. Swiss Federal Research Institute WSL, Birmensdorf, Switzerland
  • Phillips, M. WSL Institute for Snow and Avalanche Research SLF, Davos Dorf, Switzerland
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    01.02.2014
Published in:
  • Geomorphology. - 2014, vol. 206, p. 492–504
Mountain permafrost
Mass movements
Laser scanning
Digital airborne photogrammetry
Rock glacier dynamics
Remote surface monitoring
English Airborne- and terrestrial laser scanning are used in combination with digital airborne photogrammetry to monitor surface changes between 2009 and 2011 on rock glaciers and landslides at three mountain permafrost sites (Grabengufer, Schafberg and Flüela Pass) in the Swiss Alps. 3D surface changes detected through comparison of multitemporal laser scanning data, as well as horizontal creep rates determined using laser scanning data and digital airborne photogrammetry are analyzed. The methods applied allow comprehensive quantification of mass movements and volumetric changes, which are presented in 2.5D. GPS ground truths are used as reference data at the Grabengufer site. On the basis of this, a quality estimation is developed for the sites without GPS reference data. For changes with an extent of about 25 m2, a level of significance of 3 cm was obtained for both horizontal and vertical displacements under optimal measurement conditions. The complex dynamics of creeping and sliding permafrost features are investigated through analysis of their surface kinematics.
Faculty
Faculté des sciences et de médecine
Department
Département de Géosciences
Language
  • English
Classification
Geology
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/303633
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