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Observations and conceptual modelling of morphological coupling in a double sandbar system

Auteur(s) et Affiliation(s)

PRICE, T.D.
Dep. of Physical Geography, Fac. of Geosciences, Inst. for Marine and Atmospheric Research, Univ., Utrecht, Pays-Bas
RUESSINK, B.G.
Dep. of Physical Geography, Fac. of Geosciences, Inst. for Marine and Atmospheric Research, Univ., Utrecht, Pays-Bas


Description :
The AA. use a 9.3-year dataset of daily low-tide time exposure images from the double-barred beach at Surfers Paradise (Gold Coast, Australia) to analyse the temporal and spatial characteristics of morphological coupling within a double sandbar system. They distinguish 5 types of morphological coupling between the inner and outer sandbars, of which 4 coincide with a downstate progression of the outer bar. Cross-correlation of the image-derived inner- and outer-bar patterns shows coupling to be a common phenomenon in the double sandbar system studied here. Based on their observations and bathymetries assimilated from the images for a restricted set of coupling events, the AA. hypothesize that the angle of offshore wave incidence, wave height and depth variations along the outer sandbar determine the type of flow pattern (cell circulations versus meandering currents) above the inner bar and hence steer the type of coupling.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2013, vol. 38, n°. 5, p. 477-489, nombre de pages : 13, Références bibliographiques : 1 p.

Date :
2013

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais
Droits :
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