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(Article of periodic en Anglais - 2008)

Document title

Centrifuge modelling of solifluction processes : displacement profiles associated with one-sided and two-sided active layer freezing

Authors(s) and Affiliation(s)

KERN-LUETSCHG M. (1) ; HARRIS C. (1) ;
(1) School of Earth and Ocean Sciences, Univ., Cardiff, ROYAUME-UNI

Abstract

Two sets of small-scale centrifuge experiments were undertaken to simulate solifluction processes associated with one-sided freezing (with no permafrost) and two-sided freezing (with permafrost) with an active layer thick at the prototype scale. Models were frozen on the laboratory floor under normal acceleration due to gravity and thawed in the centrifuge under an acceleration of 10 gravities. After repeated freeze-thaw cycles the one-sided experiment revealed concave downslope profiles of movement with shear strain decreasing with depth, whereas in the two-sided experiment, convex downslope profiles indicated the greatest shear strain in the basal part of the active layer. The centrifuge experiments showed displacement rates similar to field measurements and analogous to full-scale laboratory experiments

Source

Article of periodic

published at : Permafrost and periglacial processes / ISSN 1045-6740 / CODEN PEPPED

Editor : Wiley, Chichester - ROYAUME-UNI (1990)

Millesime : 2008, vol. 19, no4 [pp. 379-392]

Bibliographic references : 29 ref.

Collation : 15 fig., 2 tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.633

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