caa a22 4500 463216156 CHVBK 20180405153157.0 cr unu---uuuuu 170326e20070201xx s 000 0 eng 10.1007/s00367-006-0052-0 doi (NATIONALLICENCE)springer-10.1007/s00367-006-0052-0 A new fluorescent tracers experiment improves understanding of sediment dynamics along the Arcay Sandspit (France) [Elektronische Daten] [Xavier Bertin, Antoine Deshouilieres, Jonathan Allard, Eric Chaumillon] A new fluorescent tracers experiment, based on the injection of three distinct tracers at different elevations along a beach profile, was carried out in the vicinity of the Arcay Sandspit (western France), aiming at a better understanding of its rapid growth. The results confirmed that longshore transport was the dominant process in the development of the sandspit. The cross-shore integration of the longshore transport, deduced from the tracers analysis, revealed important differences in transport rates along the beach profile. In the upper part of the beach (beach berm), transport rates were one order of magnitude higher than in the lower part. These differences are associated with increases in wave height and wave incidence with the rising tide, combined with the steepening of the beach slope along the profile. The increase in wave height and incidence at high tide can be explained by a strong decrease in bottom friction, subsequent to the higher water level. This analysis provides a new description of the long-term development of the Arcay Sandspit, involving fast transport of coarse sand within the upper part of the beach over a base of fine sand moving much more slowly. Springer-Verlag, 2007 Bertin Xavier Centre Littoral de Géophysique, Université de La Rochelle, Avenue Michel Crépeau, 17042, La Rochelle cedex 1, France aut Deshouilieres Antoine Centre Littoral de Géophysique, Université de La Rochelle, Avenue Michel Crépeau, 17042, La Rochelle cedex 1, France aut Allard Jonathan Centre Littoral de Géophysique, Université de La Rochelle, Avenue Michel Crépeau, 17042, La Rochelle cedex 1, France aut Chaumillon Eric Centre Littoral de Géophysique, Université de La Rochelle, Avenue Michel Crépeau, 17042, La Rochelle cedex 1, France aut Geo-Marine Letters Springer-Verlag 27/1(2007-02-01), 63-69 0276-0460 27:1<63 2007 27 367 https://doi.org/10.1007/s00367-006-0052-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00367-006-0052-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bertin Xavier Centre Littoral de Géophysique, Université de La Rochelle, Avenue Michel Crépeau, 17042, La Rochelle cedex 1, France aut NATIONALLICENCE 700 1- Deshouilieres Antoine Centre Littoral de Géophysique, Université de La Rochelle, Avenue Michel Crépeau, 17042, La Rochelle cedex 1, France aut NATIONALLICENCE 700 1- Allard Jonathan Centre Littoral de Géophysique, Université de La Rochelle, Avenue Michel Crépeau, 17042, La Rochelle cedex 1, France aut NATIONALLICENCE 700 1- Chaumillon Eric Centre Littoral de Géophysique, Université de La Rochelle, Avenue Michel Crépeau, 17042, La Rochelle cedex 1, France aut NATIONALLICENCE 773 0- Geo-Marine Letters Springer-Verlag 27/1(2007-02-01), 63-69 0276-0460 27:1<63 2007 27 367 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer