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(Article of periodic en Anglais - 2012)

Document title

The bed morphology of upland single-thread channels in semi-arid environments : evidence of repeating bedforms and their wider implications for gravel-bed rivers

Authors(s) and Affiliation(s)

POWELL D.M. (1) ; LARONNE J.B. (2 3 4) ; REID I. (3 2) ; BARZILAI R. (2) ;
(1) Dep. of geography, Univ., Leicester, ROYAUME-UNI
(2) Dep. of Geography and Environmental Development, Ben Gurion Univ. of the Negev, Beer Sheva, ISRAEL
(3) Dept. of geography, Univ., Loughborough, ROYAUME-UNI
(4) Lab. d'étude des Transferts en Hydrologie et Environnement (LTHE) - Univ./UMR 5564 (CNRS, INPG, IRD, UJF), Grenoble, FRANCE

Abstract

Ten sites were chosen to be representative of channels in northern Negev, characterized by 3 channel units : bars exhibit steeper than average slopes and poorly sorted mixtures of small-medium cobbles and coarse-very coarse pebbles; flats are associated with more gentle slopes and well-sorted medium-fine pebbles and granules; and transitional units have intermediate slopes and grain size. In general, all 3 units are planar, span the full channel width and have well-defined boundaries. Bars and flats are more common than the transitional units and alternate downstream for distances of several hundred metres, forming sequences that are reminiscent of the riffle-pool structure commonly observed in humid-temperate gravel-bed rivers. A notable contrast is the absence of significant bed relief : bars lack crests and flats lack depressions

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, no7 [pp. 741-753]

Bibliographic references : 2 p.

Collation : 9 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.3199

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