(Article of periodic en Anglais - 2011)

Document title

Impact of the magnitude and frequency of debris-flow events on the evolution of an alpine alluvial fan during the last two centuries: responses to natural and anthropogenic controls

Authors(s) and Affiliation(s)

COLOMBERA L. (1 2) ; BERSEZIO R. (1 3) ;
(1) Dip. Scienze della Terra, Univ., Milano, ITALIE
(2) School of Earth and Environment, Univ., Leeds, ROYAUME-UNI
(3) CNR - IDPA, Milano, ITALIE


The dynamics and the surface evolution of a post-LGM debris-flow-dominated alluvial fan (Tartano alluvial fan), which lies on the floor of an alpine valley (Valtellina, Northern Italy), have been investigated by means of an integrated study comprising geomorphological field work, a sedimentological study, photointerpretation, quantitative geomorphology, analysis of ancient to modern cartography and consultation of historical documents and records. The dynamics of the fan are determined by the alternation of low-return period catastrophic alluvial events dominated by non-cohesive debris flows triggered by extreme rainstorms with periods of low to moderate streamflow discharge. Two particular characters of the longer-term fan evolution, namely decade-scale fan degradation and toe incision, are discussed by considering plausible autogenic feedbacks and some possible controls exerted by specific external factors such as surface uplift, climate change and anthropogenic causes


Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2011, vol. 36, no12 [pp. 1632-1646]

Bibliographic references : 2 p.

Collation : 8 fig., 4 tabl.



INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2178

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
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