A numerical study on the influence of geometry on the formation of sandbanks |
| |
Authors: | Noel Carbajal Stephanie Piney Jorge Gómez Rivera |
| |
Affiliation: | (1) Instituto Potosino de Investigación Científica y Tecnológica, Apdo Postal 3-74, Tangamanga, 78231 San Luis Potosí S L P, Mexico;(2) Département de Génie Energétique et Environnement Domaine Scientifique de la Doua, Institut National des sciences Appliquées, Batiment Sadi Carnot 9, rue de la Physique, 69 100 Villeurbanne, France |
| |
Abstract: | Applying a two-dimensional, non-linear hydrodynamic numerical model in combination with a semiempirical equation for bedload sediment transport, the influence of geometry on the formation of sandbanks is investigated. In the first experiment, the formation of sandbanks in an ideal rectangular basin, resembling the Taylor’s problem, was calculated. Sandbanks occur in a small area at the closed boundary. Similar experiments were carried out for a range of wavelengths of the incident Kelvin wave. The results reveal that large wavelengths favor the generation of sandbanks. In subsequent calculations, the basin was modified by introducing new geographical features like bays and peninsulas. The numerical experiments show that geometry is a fundamental factor to determine the position where groups of sandbanks appear. The results suggest that in regions where the Kelvin wave is diffracted, the formation of sandbanks occurs. An experiment, in which we applied an ideal geometric configuration representing that of the Southern Bight of the North Sea, generated sandbank patterns resembling those observed in the region. |
| |
Keywords: | Numerical modeling Tides Sandbanks Taylor’ s problem |
本文献已被 SpringerLink 等数据库收录! |
|