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(Article of periodic en Anglais - 2013)

Document title

Effect of changes in fine-grained matrix on bedload sediment transport in a gravel-bed river

Authors(s) and Affiliation(s)

BARZILAI R. (1) ; LARONNE J.B. (1 2 3) ; REID I. (2 3) ;
(1) Dep. of Geography and Environmental Development, Ben Gurion Univ. of the Negev, Beer Sheva, ISRAEL
(2) Dept. of geography, Univ., Loughborough, ROYAUME-UNI
(3) Lab. d'Etude des transferts en Hydrologie et Environnement (LTHE), Univ. Josef Fourier, Grenoble, FRANCE

Abstract

A recent increase of a fine-grained matrix in the bed of Nahal Eshtemoa, an ephemeral river of the northern Negev, has more than doubled the boundary shear stress needed to initiate bedload. The relation between bedload flux and boundary shear stress continues to be well-defined, but it is displaced. The matrix now contains a significant amount of silt and clay size material. The reasons for the increased entrainment threshold of bedload are explored. Large-scale laser scanning of the dry bed reveals a reduction in grain-scale morphological roughness, while artificial in situ tests of matrix integrity indicate considerable cohesion. The implications for adopting bed material sampling strategies that account for matrix development are assessed

Source

Article of periodic

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

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

Millesime : 2013, vol. 38, no5 [pp. 441-448]

Bibliographic references : 1 p.

Collation : 7 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.3288

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