Embryo dune development on a large, actively accreting macrotidal beach: Calais, North Sea coast of France

Authors

  • Edward J. Anthony,

    Corresponding author
    1. Université du Littoral Côte d'Opale, Coastal Geomorphology and Shoreline Management Unit EA 3599, MREI 2, 189a Avenue Maurice Schumann, 59140 Dunkerque, France
    • Université du Littoral Côte d'Opale, Coastal Geomorphology and Shoreline Management Unit EA 3599, MREI 2, 189a Avenue Maurice Schumann, 59140 Dunkerque, France.
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  • Stéphane Vanhée,

    1. Université du Littoral Côte d'Opale, Coastal Geomorphology and Shoreline Management Unit EA 3599, MREI 2, 189a Avenue Maurice Schumann, 59140 Dunkerque, France
    2. Present address: Institution Interdépartementale Nord-Pas de Calais de la Région des Wateringues, 7 rue du Colonel Doyen, BP 373, 62505 St. Omer, France
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  • Marie-Hélène Ruz

    1. Université du Littoral Côte d'Opale, Coastal Geomorphology and Shoreline Management Unit EA 3599, MREI 2, 189a Avenue Maurice Schumann, 59140 Dunkerque, France
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Abstract

Sediment budget data from an 18-month topographic survey were analysed with data from brief experiments on wind parameters, beach moisture contents, bedforms and sand mobilization in order to monitor conditions and patterns of embryo dune development over a flat 150–1000 m wide accreting upper beach. The surface conditions over the upper beach locally affect aeolian transport, but net dune development over time depends on sustained strong winds and their orientation. Incoming marine sand supplied by storms and onshore winds is reorganized by the dominant offshore to longshore winds into elongated embryo dunes over this upper beach, imprinting a regional morphology of long-term longshore dune ridge development. Copyright © 2006 John Wiley & Sons, Ltd.

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