Dendrogeomorphic reconstruction of past debris-flow activity using injured broad-leaved trees

Auteur(s) et Affiliation(s)

ARBELLAY, E.

Lab. of Dendrogeomorphology, Inst. of Geological Sciences, Univ., Berne, Suisse

Dep. for Environmental Sciences, Univ., Genève, Suisse

STOFFEL, M.

Lab. of Dendrogeomorphology, Inst. of Geological Sciences, Univ., Berne, Suisse

Dep. for Environmental Sciences, Univ., Genève, Suisse

BOLLSCHWEILER, M.

Lab. of Dendrogeomorphology, Inst. of Geological Sciences, Univ., Berne, Suisse

Dep. for Environmental Sciences, Univ., Genève, Suisse

Description :
This study aimed at dating the occurrence of former debris flows from growth series of broad-leaved trees and at determining their suitability for dendrogeomorphic research. Results were obtained from gray alder, silver birch and pubescent birch, aspen, white poplar, black poplar and gray poplar, goat willow and black elder injured by debris-flow activity at Illgraben (Valais, Swiss Alps). Tree-ring analysis of increment cores, wedges and cross-sections from injured broad-leaved trees allowed the reconstruction of debris-flow events between AD 1965 and 2007. These events were compared with archival records on debris-flow activity at Illgraben. Results and discussion. Identification of 6 patterns of debris-flow routing and determination of preferential breakout locations of events.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2010, vol. 35, n°. 4, p. 399-406, nombre de pages : 8, Références bibliographiques : 37 ref.

Date :
2010

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais