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	Provedor de dados ArchiMer (3) Autor Forget, P (2) Arnoux-chiavassa, S (1) Broche, P (1) Cauwet, G (1) De Maistre, Jc (1) Devenon, Jean-luc (1) Fraunie, P (1) Naudin, Jj (1) Ouillon, S (1) Rey, V (1) Mais... Palavra-chave Panache fluvial (3) River plume (3) Rhône (2) 3D numerical model (1) Coastal oceanography (1) Dynamics (1) Dynamique (1) Matière en suspension (1) Modèle numérique 3D (1) Océanographie côtière (1) Radar VHF (1) Reflectance (1) Remote sensing (1) Rhone (1) Rhone river (1) Réflectance (1) Schémas variation totale décroissante (1) Stratified flows (1) Suspended matter (1) Total variation diminishing schemes (1) Mais... Tipo do documento Text (3) Ano 2003 (1) 1998 (2) País France (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Modeling 3D Rhone river plume using a higher order advection scheme ArchiMer Arnoux-chiavassa, S; Rey, V; Fraunie, P. Effects of discretization scheme on the numerical modeling of 3D Rhone River plume dynamics are investigated. A higher order scheme of total variation diminishing (TVD) type is used to discretize advection terms of both momentum and scalar equations. It is shown that this scheme widely damps the numerical diffusion and improves the representation of the dynamical and density fronts bounding the flow. It enables to accurately investigate the effects of the turbulent diffusion, which was previously masked by the numerical one. Numerical results are also compared to in situ data for two situations related to different wind conditions. For the case without wind stress, associated to supercritical values of the Richardson number, optimized turbulent... Tipo: Text Palavras-chave: Océanographie côtière; Modèle numérique 3D; Panache fluvial; Écoulements stratifiés; Schémas variation totale décroissante; Coastal oceanography; 3D numerical model; River plume; Stratified flows; Total variation diminishing schemes. Ano: 2003 URL: http://archimer.ifremer.fr/doc/00321/43259/42990.pdf Experimental study of the Rhone plume. Part I: Physics and dynamics ArchiMer Broche, P; Devenon, Jean-luc; Forget, P; De Maistre, Jc; Naudin, Jj; Cauwet, G. The complicated dynamic processes occurring when fluvial waters mix with marine waters control the nature and the fluxes of materials exported tay rivers to the sea. Understanding these processes is of primary importance in evaluating budgets. In wide-open estuarine situations these processes take place under the influence of an intense turbulence induced by tides. Conversely, the Rhone waters spread into the Mediterranean Sea in the form of an easily distinguishable buoyant plume often extending far offshore from the mouth of the river. The aim of this study is to describe the dynamic and hydrological fields on the basis of eulerian VHF radar mapping of surface currents coupled with lagrangian in situ physical or geochemical measurements. This paper... Tipo: Text Palavras-chave: Panache fluvial; Radar VHF; Rhône; Dynamique; River plume; VHF radar; Rhone; Dynamics. Ano: 1998 URL: http://archimer.ifremer.fr/doc/00325/43636/43229.pdf Surface suspended matter off the Rhone river mouth from visible satellite imagery ArchiMer Forget, P; Ouillon, S. The quantification of surface Total Suspended Matter (TSM) off the Rhone river mouth is investigated using SPOT-XS and Landsat-TM images collected in November 1994. The method of satellite data calibration from in situ measurements is discussed. It is based on TSM concentration measurements through filtration of surface water samples and on radiometric data collected with a 256-channel spectroradiometer in the range 400-1100 nm. Empirical relationships between reflectance and TSM concentration are established by linear regression analysis of the data. These relationships are then applied to the image data corrected from atmospheric and surface effects. A good agreement, within a factor of less than two, was found on derived TSM concentration values as... Tipo: Text Palavras-chave: Réflectance; Matière en suspension; Télédétection; Panache fluvial; Rhône; Reflectance; Suspended matter; Remote sensing; River plume; Rhone river. Ano: 1998 URL: http://archimer.ifremer.fr/doc/00325/43637/43228.pdf Registros recuperados: 3 Primeira ... 1 ... Última

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