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Advances in Materials Science and Engineering
Volume 2010, Article ID 245398, 6 pages
http://dx.doi.org/10.1155/2010/245398
Research Article

Effect of Coarse Particle Volume Fraction on the Yield Stress of Muddy Sediments from Marennes Oléron Bay

1Université du Havre, LOMC, FRE CNRS 3102 - 53, Rue Prony, BP540, 76058 Le Havre, France
2IFREMER, LERPC, Place Gaby Coll, BP7, 17137 L'Houmeau, France
3Université de Poitiers, LEA, UMR CNRS 6609, Boulevard M. et P. Curie, 86962 Futuroscope Cedex, France

Received 25 March 2010; Accepted 16 May 2010

Academic Editor: Marcel Ausloos

Copyright © 2010 A. Pantet et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Coastal erosion results from a combination of various factors, both natural and humaninduced, which have different time and space patterns. In addition, uncertainties still remain about the interactions of the forcing agents, as well as on the significance of non-local causes of erosion. We focused about the surface sediments in the Marennes Oléron bay, after a general description of the site that has many various activities. The superficial sediments show a mechanical behavior, mainly depends on the fine fraction for a composition that contains up to 60% of sandy material. Fine sediments fraction has a typical yield stress depending naturally of concentration or water content. This yield could be modified slightly or significantly by adding silt or sand. As a result, the rheological measurement sensitivity allows us to characterize five typical sediments that correlate with solid fraction and fine fraction.