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| Titel |
Contribution of multi-temporal remote sensing images to characterize landslide slip surface ‒ Application to the La Clapière landslide (France) |
| VerfasserIn |
B. Casson, C. Delacourt, P. Allemand |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 5, no. 3 ; Nr. 5, no. 3 (2005-05-30), S.425-437 |
| Datensatznummer |
250002491
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| Publikation (Nr.) |
 copernicus.org/nhess-5-425-2005.pdf |
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| Zusammenfassung |
| Landslide activity is partly controlled by the geometry of the slip surface.
This activity is traduced at the surface
by displacements and topographic variations. Consequently, multi-temporal
remote sensing images can be used in order to characterize the geometry of
landslide slip surface and its spatial and temporal
evolution. Differential Digital Elevation Models (DEMs)
are obtained by subtracting two DEMs of different years. A
method of multi-temporal images correlation allows to generate displacement
maps that can be interpreted in terms of velocity and direction of
movements. These data are then used to characterize
qualitatively the geometry of the slip surface of the la Clapière
landslide (French Southern Alps). Distribution of
displacement vectors and of topographic variations are in accordance with a
curved slip surface, characterizing a preferential rotational behaviour of
this landslide. On the other hand, a spatial and temporal
evolution of the geometry of the slip surface is pointed out. Indeed, a
propagation of the slip surface under the Iglière bar, in the W part of
the landslide, is suspected and can be linked to the acceleration of the
landslide in 1987. This study shows the high potential of multi-temporal
remote sensing images for slip surface characterization. Although this
method could not replace in situ investigations, it can really help to well
distribute geophysical profiles or boreholes on unstable areas. |
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