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| Titel |
Assessment of debris-flow susceptibility at medium-scale in the Barcelonnette Basin, France |
| VerfasserIn |
M. S. Kappes, J.-P. Malet, A. Remaître, P. Horton, M. Jaboyedoff, R. Bell |
| 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 ; 11, no. 2 ; Nr. 11, no. 2 (2011-02-28), S.627-641 |
| Datensatznummer |
250009173
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| Publikation (Nr.) |
 copernicus.org/nhess-11-627-2011.pdf |
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| Zusammenfassung |
| Debris flows are among the most dangerous processes in mountainous areas due
to their rapid rate of movement and long runout zone. Sudden and rather
unexpected impacts produce not only damages to buildings and infrastructure
but also threaten human lives. Medium- to regional-scale susceptibility
analyses allow the identification of the most endangered areas and suggest
where further detailed studies have to be carried out. Since data
availability for larger regions is mostly the key limiting factor, empirical
models with low data requirements are suitable for first overviews. In this
study a susceptibility analysis was carried out for the Barcelonnette Basin,
situated in the southern French Alps. By means of a methodology based on
empirical rules for source identification and the empirical angle of reach
concept for the 2-D runout computation, a worst-case scenario was
first modelled. In a second step, scenarios for high, medium and low
frequency events were developed. A comparison with the footprints of a few
mapped events indicates reasonable results but suggests a high dependency on
the quality of the digital elevation model. This fact emphasises the need for
a careful interpretation of the results while remaining conscious of the inherent
assumptions of the model used and quality of the input data. |
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