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(Article of periodic en Anglais - 2013)

Document title

Effects of helical flow in one-dimensional modelling of sediment distribution at river bifurcations

Authors(s) and Affiliation(s)

VAN DER MARK C.F. (1) ; MOSSELMAN E. (1 2) ;
(1) Dep. of River Dynamics and Inland Water Transport, Deltares, Delft, PAYS-BAS
(2) Fac. of Civil Engineering and Geosciences, Univ. of Technology, Delft, PAYS-BAS

Abstract

Complex flow processes at river bifurcations and the influence of the layout of a bifurcation make it difficult to predict sediment distribution over the downstream branches in case bedload transport dominates. In one-dimensional models a nodal point relationship, that prescribes the distribution of sediment over the downstream branches, is needed. The AA. have identified which factors need to be included in such a relationship for the division of bedload transport at bifurcations. The relationship has been tested against data from a unique set of laboratory measurements, numerical data and data from a scale model of the Rhine bifurcation at Pannerden in the Netherlands. It is concluded that deriving a practical physics-based 1-D relationship including all relevant processes is not feasible. The AA. therefore recommend 2-D or 3-D modelling for all cases in general where morphological evolution depends on the division of bedload transport at bifurcations

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. 502-511]

Bibliographic references : 31 ref.

Collation : 12 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.3335

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