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(Article of periodic en Anglais - 2007)

Document title

Hazard assessment of potential periglacial debris flows based on GIS-based spatial modelling and geophysical field surveys : a case study in the Swiss Alps

Authors(s) and Affiliation(s)

KNEISSEL C. ; ROTHENBÜHLER C. ; KELLER F. ; HAEBERLI W. ;

Abstract

In a potential debris flow-starting zone in the Upper Engadine (moraine/debris rock glacier complex Boval) two-dimensional electrical resistivity surveys were used to detect the presence/absence of permafrost and to estimate active-layer depth. The results show that the moraine complex represents a periglacial debris reservoir which consists of frozen and unfrozen debris. The ice-bonded part of the moraine is largely protected from sudden destabilisation and retrogressive erosion can be assumed to be limited. However, future degradation or loss of permafrost in the lower parts of the debris rock glacier would increase the amount of erodible debris and reduce mechanical stability

Source

Article of periodic

published at : Permafrost and periglacial processes / ISSN 1045-6740 / CODEN PEPPED

Editor : Wiley, Chichester - ROYAUME-UNI (1990)

Millesime : 2007, vol. 18, no3 [pp. 259-268]

Bibliographic references : 22 ref.

Collation : Illustration ;

Language

Anglais

Localisation

Laboratoire INTERGEO - Paris

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2008.
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