Jouon Aymeric auteur aut IRD Douillet Pascal auteur aut IRD Ouillon Sylvain auteur aut IRD Fraunie P. auteur aut IRD text journalArticle eng text/pdf born digital access Hydrodynamic time parameters (HTs) in a semi-opened aquatic ecosystem are synthetic indicators offering the opportunity to bring out the links between its physical functioning and its biology. The generic term "residence time" is frequently used through literature to mention HTs resulting in various calculation methods. This article presents different computing methods relying on the use of a 3D numerical hydrodynamic model and the HTs to which they give access. Several large-scale (water exchange time, average water export time, e-flushing time) and local time parameters (export time, flushing lag, local e-flushing time) are defined. The applications presented are carried out within the south-west lagoon of New Caledonia (SLNC), on three embedded control volumes. The definition of the control volume is more important for the values of local HTs than for their comparative distribution. The comparison of the global hydrodynamic time scales applied to a control volume provides information on the mixing processes inside the control volume. (c) 2006 Elsevier Ltd. All rights reserved. specialized residence time drifters flushing local e flushing time tracer techniques mathematical model lagoons New Caledonia 032 26 12-13 1395-1415 2006 0278-4343 https://www.documentation.ird.fr/hor/PAR00001093 10.1016/j.csr.2005.11.014 0278-4343 [F B010035754] https://www.documentation.ird.fr/hor/PAR00001093 https://www.documentation.ird.fr/intranet/publi/2006/09/010035754.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2006-10-06 2017-08-23 PAR00001093 fre