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(Article of periodic en Anglais - 2014)

Document title

Channel pattern of proglacial rivers : topographic forcing due to glacier retreat

Authors(s) and Affiliation(s)

MARREN P.M. (1) ; TOOMATH S.C. (1) ;
(1) Dept. of Resource management and Geography, Univ. of Melbourne, Parkville, AUSTRALIE

Abstract

This paper compares widely used models of river channel pattern against the changes observed at Skaftafellsjökull, Iceland. Topography was found to play a large role in determining channel pattern in proglacial environments for 2 reasons : 1) glacier retreat forces rivers to flow through confined moraine reaches; 2) proximal incision of proglacial rivers, accompanied by downstream aggradation, leads to changes in slope which force the river to cross channel pattern thresholds. The findings of this work indicate that in the short term, the majority of channel pattern change in proglacial rivers is due to topographic forcing, and that changes due to changing hydrology and sediment supply are initially relatively minor, although likely to increase in significance as deglaciation progresses. These findings have implications for palaeohydraulic studies. This paper shows that channel pattern can change at timescales faster than hydrological or sediment budget changes usually occur, in association with relatively minor changes in glacier mass balance

Source

Article of periodic

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

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

Millesime : 2014, vol. 39, no7 [pp. 943-951]

Bibliographic references : 1 p.

Collation : 6 fig., 1 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3545

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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