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Study of Dissipating of Wave Energy in the Breakers Zone of the Gulf of Guinea: Case of Autonomous Port of Cotonou in Benin Coastal Zone

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Journal of Modern Physics 2022年第9期13卷 1272-1286页

作者： Oswald G. Acclassato noukpo bernard tokpohozin Christian D. Akowanou Adjimon Mathias Houékpohéha Guy Hervé Houngue Bruno Basile Kounouhéwa Laboratoire de Physique du Rayonnement FAST-UAC Cotonou République du Bénin Département de Physique (FAST) et Formation Doctorale Sciences des Matériaux (FDSM/UAC) Calavi République du Bé-nin Institut National Supérieur des Classes Préparatoires aux Etudes d’Ingénieur (INSPEI/UNSTIM) Abomey République du Bénin Institut de Mathématiques et de Sciences Physiques (IMSP/UAC) Porto-Novo République du Bénin

Rapid population growth and major trends of world economy growth have led to significant energy needs in our country. Benin, Gulf of Guinea country, although with a significant coastal network powered by potential energy from breaking waves, has experienced a deficit and a critical energy instability, marked by recurrent power cuts and disruption of the national economy. To ensure the integration of this source of renewable energy in the Benin energy mix and sustainably reduce the energy deficit in progress, this work has aimed to study the dissipation of wave energy at the bathymetric breaking in the breakers zone of Cotonou coast. Sea conditions and the statistics parameters of the breaking waves under perturbation effect of the seabed were evaluated to predict the beginning of the breaking. The modeling is based on the Navier-Stokes equation in which the viscosity and the interactions between the molecules of the oceanic fluid are neglected. The nonlinear wave dispersion relation is also used. The results obtained for this purpose showed that water particles have an almost parabolic motion during their fall;their velocity is higher than those of the early breaking. In this area, the waves dissipate about 80% of their energy: it generates turbulence which leads to a strong setting in motion of sediments.

关键词： Wave Breaker Zone Wave Power Energy Dissipation Seabed

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Modelling of sediment movement in the surf and swash zones

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Acta Oceanologica Sinica 2015年第2期34卷 137-142页

作者： tokpohozin N.B. KOUNOUHEWA B. AVOSSEVOU G.Y.H. HOUEKPOHEHAM A. AWANOU C.N. Institut de Mathématiques et de Sciences Physiques (IMSP/UAC) Centre Béninois de la Recherche Scientifique et Technique (CBRST) Laboratoire de Physique du Rayonnement (LPR/FAST-UAC)

Under the action of marine currents,non-cohesive sediments evolve by bed-load,by saltation or suspension depending on their *** authors have considered that the movement of sediment is bidimensional and modelized the effects of swell by a constant velocitynear the *** we have studied the velocity profile of fluctuating currents near the seabed and studied the movement of sediment in *** results show that in the areas of study（surf and swash）the movement of sediment occurs in a volume,and the evolution of sediment varies from an areato *** obtained theoretical profiles of the position and velocity vectors confirm the observations of several authors.

关键词： non-cohesive sediments sediment dynamics swell trajectory of sediment velocity drive

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