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(Article of periodic en Anglais - 2012)

Document title

Topographic forcing of flow partition and flow structures at river bifurcations

Authors(s) and Affiliation(s)

MIORI S. (1) ; HARDY R.J. (2) ; LANE S.N. (3) ;
(1) Dip. di Ingegneria Civile e Ambientale, Univ., Trento, ITALIE
(2) Dep. of Geography, Univ., Durham, ROYAUME-UNI
(3) Inst. de Géographie, Fac. des Géosciences et de l'Environnement, Univ., Lausanne, SUISSE

Abstract

The aim of this paper is to explore the interaction between bedform steered flow and bifurcation dynamics. The AA. present the predicted flow dynamics from the application of a Reynolds-averaged Navier–Stokes (RANS) model to a series of bifurcation geometries with morphologies measured during previous flume experiments. The topography of the bifurcations consists of either plane or bedform-dominated beds which may or may not possess discordance between the 2 bifurcation distributaries. The results demonstrate the dominant effect bed discordance has upon flow division between the 2 distributaries. They also suggest that sand-bed river bifurcations are more likely to have an influence that extends much further upstream and have a greater impact upon water distribution. This may contribute to observed morphological differences between sand-bedded and gravel-bedded braided river networks

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, no6 [pp. 666-679]

Bibliographic references : 61 ref.

Collation : 15 fig., 3 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3204

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
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