[article] | Titre : | Convergence of estuarine channels | | Type de document : | Livre | | Auteurs : | Job Dronkers, Auteur | | Année de publication : | 2017 | | Article en page(s) : | pp. 120-133 | | Langues : | Anglais | | Mots-clés : | estuaire dynamique fluviale morphologie | | Résumé : | "Tide-dominated coastal plain estuaries have typically up-estuary convergent tidal channels. Analysis of estuarine characteristics indicates a dependence of the convergence length on relative tidal amplitude, relative intertidal area and river flow velocity. In order to explain these relationships we investigate a condition for continuity of net sediment transport throughout the estuary, corresponding to morphodynamic equilibrium. We show, by using an analytical solution of the tidal equations, that this condition is equivalent to a condition on the convergence length. This condition is evaluated for 21 estuaries in different regions of the world. It appears that the convergence length determined in this way can explain observed convergence lengths for the considered set of estuaries. The dependence of the convergence length on different estuarine characteristics is analysed by solving the fully coupled hydro-morphodynamic equations. We show that this dependence limits the range of variation of the tidal velocity amplitude. The analysis provides insight in the morphological response of estuaries to human interventions. The condition can easily be evaluated to yield an estimate of this response. " | | Type de publication : | périodique | | Référence biblio : | Dronkers J., 2017 - Convergence of estuarine channels. Continental Shelf Research, 144 : 120-133. | | Permalink : | http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=66066 |
in Continental Shelf Research > vol. 144 (Juillet 2017) . - pp. 120-133
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trié(s) par (Pertinence décroissant(e), Titre croissant(e)) Affiner la recherche Générer le flux rss de la rechercheAndré VIGARIÉ et l'aménagement de la Basse-Loire : mise en perspective in Cahiers nantais, n°2008-1 (2008)
