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(Article of periodic en Anglais - 2009)

Document title

Recent evolution of debris-flow fans in the central Swiss Alps and associated risk assessment : two examples in Roseg Valley

Authors(s) and Affiliation(s)

GARAVAGLIA V. (1) ; PELFINI M. (1) ; BINI A. (1) ; ARZUFFI L. (1) ; BOZZONI M. (1) ;
(1) "Ardito Desio" Dep. of Earth Sciences, Univ., Milan, ITALIE

Abstract

This paper reports the results of research carried out in the Roseg Valley (Lower Engadine, Switzerland) that examines debris-flow fan typology, debris-flow activity, and the impact of debris flows on forest vegetation. Depositional landforms from debris flows were subdivided according to their degree of geomorphological hazard. An inventory of debris-flow fans and a detailed geomorphological, vegetational, and dendrochronological study of two of them was undertaken. The dendrochronological analysis allowed dating of historical events and reconstruction of their recent evolution. By dating scars and growth anomalies on Larix decidua Mill. and Pinus cembra L., 24 debris-flow events were identified on the Misaun fan and 16 on the Tschierva fan, and differences in their distribution due to the drainage basin characteristics identified. This approach contributes to hazard assessment on fans

Source

Article of periodic

published at : Physical geography / ISSN 0272-3646

Editor : Taylor & Francis, Abingdon - ROYAUME-UNI (1980)

Millesime : 2009, vol. 30, no2 [pp. 105-129]

Bibliographic references : 3 p.

Collation : 17 fig., 7 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 20106

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.247/0272-3646.30.2.105

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2009
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