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Kinematics of active earthflows revealed by digital image correlation and DEM subtraction techniques applied to multi-temporal LiDAR data

Auteur(s) et Affiliation(s)

DAEHNE, A.
Dept. of Geosciences, univ. of Missouri, Kansas City, Etats-Unis
CORSINI, A.
Dept. of Chemical and Geological Sciences, Univ. of Modena and Reggio Emilia, Modena, Italie


Description :
The AA. explored the possibility to quantify displacement vectors on a spatially distributed basis and to quantify volumetric transfer at the slope scale with regard to a large flow-type landslide located in the northern Apennines of Italy. For this purpose they applied digital image correlation (DIC) and digital elevation model differencing (DEMoD) techniques to multi-temporal airborne LiDAR surveys of 2006, 2007 and 2009. The DIC was applied to greyscale slope gradient maps retrieved after precise co-registration of LiDAR surveys. Thereby, movement patterns over various sectors of the landslide were reconstructed and quantified. The DEMoD analysis revealed significant mass transfer from the source to the tracks and toe zone. In conclusion, the successful application of DIC and DEMoD to the case study underlines the added value of high-resolution DEMs in the analysis of earthflow kinematics toward a better understanding of their role in the geomorphic evolution of slopes.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2013, vol. 38, n°. 6, p. 640-654, nombre de pages : 15, Références bibliographiques : 2 p.

Date :
2013

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais
Droits :
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