Consulta: subjectFacets:"Transport sédimentaire"
Registros recuperados: 3
Data/hora: 07/06/2024 06:18:13

Remaniements sédimentaires superficiels sur l'estran occidental de la baie du Mont Saint-Michel
Provedor de dados: 5
Autores: Bonnot-courtois, C; Bassoullet, Philippe; Tessier, B; Cayocca, Florence; Le Hir, Pierre; Baltzer, A.
In order to define and quantify the rhythm and amplitude of the processes of erosion and sedimentation on broad tidal flats, in situ measurements of sediment elevation have been performed in the western part of the Mont-Saint-Michel bay. The amplitude of reworking is generally low (&lt; ± 5 cm), and variable from west to east. The wind influence on tidal currents and surficial reworking emphasizes erosion phases rapidly followed by accretion of similar amplitude on the whole tidal flat. A numerical model for hydrodynamics and sediment transport is applied to Mont Saint Michel Bay, where ecological concerns are related to sediment transfers.
Tipo: Text
Palavras-chave: Sediment transport; Numerical model; Erosion sedimentation budget; "In situ" measurements; Tidal sandy mud flat; Transport sédimentaire; Modèle numérique; Bilan érosion sédimentation; Mesures in situ; Estran sablo vaseux.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-6279.pdf

Modélisation morphodynamique d'une embouchure tidale : Application aux Passes d'entrée du Bassin d'Arcachon
Provedor de dados: 5
Autores: Cayocca, Florence.
The Arcachon tidal inlet exhibits a particularly active morphology due to strong tidal currents and rough wave conditions. During the past 300 years, maximum and minimum extents of the Cap Ferret sand spit have resulted in a difference of 8 km while two channels have alternatively allowed circulation between the lagoon and the ocean.   A bidimensional horizontal morphodynarnic model was developed in order to simulate the system evolution under tidal forcing alone or under combined tide and wave action. Modelling at a scale of decades requires the definition of mean annual wave and tide conditions which are representative with respect to sediment transport. Medium term results thus give general trends of evolution. Driven by these average conditions and...
Tipo: Text
Palavras-chave: Littoral drift; Sediment transport; Tide; Waves; Arcachon lagoon; Tidal inlet; Modelling; Morphodynamic; Dérive littorale; Transport sédimentaire; Marée; Houle; Bassin d'Arcachon; Modèle; Morphodynamique.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/1996/these-4520.pdf

Numerical study of sedimentary impact of a storm on a sand beach simulated by hydrodynamic and sedimentary models
Provedor de dados: 5
Autores: Meule, S; Pinazo, C; Degiovanni, C; Barusseau, Jp; Libes, M.
In marine coastal environments, storms have a major morphological impact on sand beaches. This study, part of the French Programme National d'Environnement Cotier, consisted in developing and applying hydrodynamic and sedimentary models to simulate the major processes that modify sand beaches. In order to study sediment dynamics, we developed three models to simulate waves, currents and sediment transport associated with a storm event. The wave model was a Mild Slope Equation model based on the parabolic approximation of the refraction-diffraction equation of Berkhoff. The hydrodynamic model was obtained by the depth-average of Navier Stockes' equations forced by the terms of radiation stresses induced by waves. The sedimentary model SEDSIM developed by...
Tipo: Text
Palavras-chave: Modification de la plage; Modèles numériques; Transport sédimentaire; Tempête; Courants induits par la houle; Beach modification; Numerical models; Sediment transport; Storm; Wave-induced current.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00322/43339/42887.pdf