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(Article of periodic en Anglais - 2009)

Document title

Profile evolution and active layer measurements on a macrotidal composite gravel beach, Somme Estuary, France

Authors(s) and Affiliation(s)

CUROY J. ; MOSES C.A. ; ROBINSON D.A. ; WILLIAMS R.B.G. ;

Abstract

Morphological change, active layer variations and nearshore hydrodynamics were measured over a complete neap-spring-neap tidal cycle on a mixed sediment sand and gravel spit at Cayeux-sur-Mer, northern France. Three key phases of morphological change were identified, mainly associated with maximum tidal levels : 1) berm accretion during calm wave conditions (tidal range moved from neap to spring tide); 2) berm retreat and erosion in relation to sediment supply and wave conditions (tidal range still moving towards spring tide); 3) berm reconstruction and seaward progradation followed by stability (through the spring tide and approching the neap tide). Cusps occurred twice indicating the reflective nature of the beach. The method used to measure active layer depth made it possible to discern the contributions of both erosion and accretion to profile changes. Maximum activation layer depths were associated with the zone of wave breaking and berm movement and empirical formulae linking the active layer depth to the wave height have been calculated

Source

Article of periodic

published at : Zeitschrift für Geomorphologie / ISSN 0372-8854 / CODEN ZGMPAG

Editor : Gebruder Borntraeger, Stuttgart - ALLEMAGNE (1925)

Millesime : 2009, vol. 53, no3 [pp. 387-409]

Bibliographic references : 2 p.

Collation : 9 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 8829

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1127/0372-8854/2009/0053-0387

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2009
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