IGB

Connexion

(Article of periodic en Anglais - 2011)

Document title

Modelling a cohesive-frictional debris flow: an experimental, theoretical, and field-based study

Authors(s) and Affiliation(s)

DE BLASIO F.V. (1) ; BREIEN H. (1 2) ; ELVERHØI A. (1 2) ;
(1) Dep. of Geosciences, Univ., Oslo, NORVEGE
(2) International Center for Geohazards (ICG), Oslo, NORVEGE

Abstract

The AA. present a coupled rheological-numerical model to characterize the debris flows in which cohesive and frictional materials are both present. As a first step, they consider small-scale artificial debris flows in a flume with variable percentages of clay versus sand, and measure separately the rheological properties of sand–clay mixtures. A comparison with the predictions of a modified version of the numerical model BING shows a reasonable agreement between measurements and simulations. As application to a field case, the AA. analyse a recent debris flow that occurred in Fjærland (Western Norway), caused by a glacial lake outburst flood (GLOF) originating from the failure of a moraine ridge. In contrast to the laboratory debris flows, the presence of large boulders and the higher normal pressure inside the natural debris flow requires the introduction of a novel rheological model that distinguishes between mud-to–clast supported material

Source

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, no6 [pp. 753-766]

Bibliographic references : 23 ref.

Collation : 7 fig., 5 tabl., 2 annexes

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2101

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
Refdoc record number (ud4) : 24547210 : Permanent link - XML version
Powered by Pxxo