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| Titel |
Analysis of a landslide multi-date inventory in a complex mountain landscape: the Ubaye valley case study |
| VerfasserIn |
R. Schlögel, J.-P. Malet, P. Reichenbach, A. Remaître, C. Doubre |
| 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 Sciences ; 15, no. 10 ; Nr. 15, no. 10 (2015-10-22), S.2369-2389 |
| Datensatznummer |
250119723
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| Publikation (Nr.) |
 copernicus.org/nhess-15-2369-2015.pdf |
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| Zusammenfassung |
In the paper we analyse a multi-date landslide inventory prepared for a
mountainous area affected by several landslide types with different degrees
of activity, we attempt to quantify the uncertainties associated to the
mapping, we measure the evolution of morphological indicators and estimate
landslide activity and temporal occurrence. The inventory, covering the
period 1956–2010, is prepared for the middle section of the Ubaye valley
(southern French Alps) based on the analysis of multi-source documents
(geomorphological maps, historical reports of landslide events, field
surveys, orthophotographs and SAR (synthetic aperture radar) satellite images). The uncertainties
derived from the expert interpretation of different sources of information,
the landslide morphological features and the affected land covers are taken
into account in relation to the source documents.
Morphological indicators are calculated to describe quantitatively the
evolution of the landslides (length, area, relative elevation, runout
distance). Frequency–area density functions are computed to estimate the
changes in the landslide distributions and a Poisson model is used to
estimate the probability of reactivation of the observed landslides and the
occurrence of new failures. The proposed multi-date inventory and the
associated statistics provide additional information to the event catalogue
managed by the local policy makers. |
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