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(Article of periodic en Anglais - 2010)

Document title

Couplig mechanisms in double sandbar systems. Part 1 : Patterns and physical explanation

Authors(s) and Affiliation(s)

CASTELLE B. (1 2) ; RUESSINK B.G. (3) ; BONNETON P. (2 3) ; MARIEU V. (1 2) ; BRUNEAU N. (1 2) ; PRICE T.D. (3) ;
(1) CNRS, UMR EPOC 5805, Talence, FRANCE
(2) Univ. Bordeaux, UMR EPOC 5805, Talence, FRANCE
(3) Inst. for Marine and Atmospheric Research, Dep. of Physical Geography, Utrecht, PAYS-BAS

Abstract

Here the AA. use a nonlinear morphodynamic model to show that alongshore variability in outer-bar depth, and the relative importance of wave breaking versus wave focussing by refraction across the outer bar, is crucial to the inner-bar rip channel development. The coupling patterns simulated by their model are similar to those observed in the field. Morphological coupling requires a template in the morphology (outer-bar geometry) which, through the positive feedback between flow, sediment transport and the evolving morphology (that is, self-organization) enforces the development of coupling patterns. The AA. therefore introduce a novel mechanism that blurs the distinction between self-organization and template mechanisms. This mechanism may also be extended to explain the dynamics of other nearshore patterns, such as beach cusps

Source

Article of periodic

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

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

Millesime : 2010, vol. 35, no4 [pp. 476-486]

Bibliographic references : 64 ref.

Collation : 11 fig.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.1929

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2010
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