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(Article of periodic en Anglais - 2012)

Document title

Erosional power in the Swiss Alps : characterization of slope failure in the Illgraben

Authors(s) and Affiliation(s)

BENNETT G.L. (1) ; MOLNAR P. (1) ; EISENBEISS H. (2) ; MCARDELL B.W. (3) ;
(1) Inst. of Environmental Engineering,ETH, Zürich, SUISSE
(2) Inst. of Geodesy and Photogrammetry, ETH, Zurich, SUISSE
(3) Swiss Federal Research Inst. WSL, Birmensdorf, SUISSE

Abstract

The AA. used digital photogrammetry to produce a multi-temporal record of erosion (1963-2005) of a rock slope at the head of the Illgraben, a very active catchment prone to debris flows in Switzerland. Slope failures affect 70% of the study slope. The slope failures form a characteristic magnitude-frequency distribution with a rollover and a power-law tail. This is the result of 2 separate slope failure processes. Type (1) failures are frequent, small slides and slumps within the weathered layer of highly fractured rock and loose sediment, and make up the rollover. Type (2) failures are less frequent and larger rockslides and rockfalls within the internal bedded and fractured slope along pre-determined potential failure surfaces, and make up the power-law tail. Rockslides and rockfalls of high magnitude and relatively low frequency make up 99% of the total failure volume and are thus responsible for the high erosion rate

Source

Article of periodic

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

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

Millesime : 2012, vol. 37, no15 [pp. 1627-1640]

Bibliographic references : 1 p.

Collation : 10 fig., 7 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3263

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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