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An operational model to simulate post-accidental radionuclide transfers in Toulon marine area: preliminary development ArchiMer
Duffa, Celine; Dufois, Francois; Coudray, Sylvain.
As part of its development of post-accident management tools, the French Institute for Radiological Protection and Nuclear Safety is setting up a model to simulate radionuclide dispersion in the Toulon marine area (one of France's main military ports). The model is based on the MARS 3D code developed by IFREMER. It reproduces hydro-sedimentation phenomena in the Bay of Toulon with a horizontal spatial resolution of 100 m and 30 vertical sigma levels and also factors in radioactive decay and dissolved/particulate distribution of the radionuclides studied. With no tide, the major currents in this area are generated by the wind. The model effectively reproduces the resulting hydrodynamic phenomena, which were measured throughout the summer of 2009 in the...
Tipo: Text Palavras-chave: Bay of Toulon; Radionuclides; Dispersion; MARS.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00053/16465/15998.pdf
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Connectivity patterns of coastal fishes following different dispersal scenarios across a transboundary marine protected area (Bonifacio strait, NW Mediterranean) ArchiMer
Koeck, Barbara; Gerigny, Olivia; Durieux, Eric Dominique Henri; Coudray, Sylvain; Garsi, Laure-helene; Bisgambiglia, Paul-antoine; Galgani, Francois; Agostini, Sylvia.
The Strait of Bonifacio constitutes one of the rare transboundary Marine Protected Areas (MPA) of the Mediterranean Sea (between Sardinia, Italy and Corsica, France). Based on the hypothesis that no-take zones will produce more fish larvae, compared to adjacent fished areas, we modeled the outcome of larvae released by coastal fishes inside the no-take zones of the MPA in order to: (i) characterize the dispersal patterns across the Strait of Bonifacio; (ii) identify the main potential settlement areas; (iii) quantify the connectivity and the larval supply from the MPAs to the surrounding areas. A high resolution hydrodynamic model (MARS 3D, Corse 400m) combined to an individual based model (Ichthyop software) was used to model the larval dispersal of fish...
Tipo: Text Palavras-chave: Biophysical model; Early life stages; Reproductive timing; Pelagic larval duration; Corsica; Ichthyoplankton.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00248/35886/34407.pdf
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Fonctionnement hydrodynamique de la lagune de Biguglia. Partie 1 : Mise en place de la modélisation numérique 3D ArchiMer
Dufresne, Christiane; Malet, Nathalie; Coudray, Sylvain; Fiandrino, Annie.
Le projet Interreg Retralags vise une gestion durable du patrimoine des lagunes, des lacs et des étangs et est développée afin de protéger et de valoriser le patrimoine écosystémique. Cette gestion intégrée s’appuie notamment sur des modèles de gestion des zones humides, qui permettent d’une part d’améliorer notre compréhension de leur fonctionnement et d’autre part, de tester des hypothèses par la simulation de scénarii. Les deux actions IFREMER sont : - La mise en place du modèle hydrodynamique de la lagune de Biguglia, développement d’indicateur hydrologiques opérationnels et test de scenarii hydrologiques et climatiques - La mise en place du modèle écosystémique sur la lagune de Biguglia, développement d’indicateur écologiques opérationnels et test de...
Tipo: Text Palavras-chave: Modèle hydrodynamique; MARS3D; Lagune; Biguglia.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00433/54453/55824.pdf
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Hydrologie du Grand Etang de Miquelon. Estimation des flux et renouvellements ArchiMer
Le Moine, Olivier; Geairon, Philippe; Robert, Stephane; Coudray, Sylvain; Fiandrino, Annie; Goraguer, Herle; Goulletquer, Philippe.
This study aims to assess the hydrological fluxes between the ‘Grand Etang’ of Miquelon and the oceanic part. Bathymetric surveys and Doppler current meter data acquisitions were carried out from August 14th, to November 5th, 2014 and from April 1st, to end of July 2015 to allow the following estimates : Total area (227 Ha) and characteristics volumes (total : 6,7 106 m3; oscillating 2,8 106 m3 (40 %); half-tide 5,2 106 m3) Velocity Index of channel to evaluate the average current speed at cross-section channel Fluxes, on flood and ebb tide respectively : Instantaneous flow: maxima at 94,2 et 65 m3/s mean 37.2 et 24.5 m3/s. in 2014 and maxima 85,03 et 73,62 m3/s mean 26,22 et 28,20 m3/s in 2015. Circulating fluxes by tide : maxima 1,06 and 1,09 106 m3,...
Tipo: Text Palavras-chave: Flux hydrologiques; Courantométrie; Bathymétrie; Grand Etang Miquelon; Modélisation; Hydrological fluxes; Current meter data acquisition; Bathymetry; Grand Etang Miquelon; Modelling.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00332/44325/43904.pdf
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Modélisation de l'emprise BAST - Modèle 100m de la région de BASTIA. Document I : Construction du modèle aspects opérationnels ArchiMer
Gerigny, Olivia; Coudray, Sylvain.
Document descriptif de la construction du modèle hydrodynamique des eaux de la méditerranée autour de la Région de Bastia (Haute-Corse).
Tipo: Text Palavras-chave: Modélisation; MARS3D; BASTIA; CORSE; Hydrodynamique.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00154/26489/24598.pdf
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Rapport 2018 Ifremer. Evolution des lagunes de Saint Pierre et Miquelon. Dynamique de renouvellement des masses d’eaux du Grand Barachois ArchiMer
Le Moine, Olivier; Geairon, Philippe; Robert, Stephane; Coudray, Sylvain; Fiandrino, Annie; Goraguer, Herle; Goulletquer, Philippe.
La dynamique des masses d'eaux et les flux de transit semble favoriser un comblement et/ou des limitations de renouvellement d'eau mettant en péril la durabilité de l’environnement de cette lagune Miquelonnaise. La Préfecture de Saint Pierre et Miquelon et la DTAM, en soutien à la gestion durable de cet environnement, ont sollicité l’Ifremer pour l’évaluation des flux d’alimentation de cette lagune. Une mission sur place a été réalisée en juin 2016 afin de coordonner les actions et effectuer les mesures préliminaires portant sur les jaugeages, la bathymétrie du chenal et la courantométrie horizontale. Ces données ont ensuite été complétées par une acquisition continue des vitesses de courant, avec des données disponibles du 2 juin au 15 novembre 2016, puis...
Tipo: Text Palavras-chave: Hydrodynamique; Renouvellements; Saint Pierre et Miquelon; Lagune; Grand Barachois; Hydrodynamic; Renewal rates; Saint Pierre et Miquelon; Lagoon; Grand Barachois.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00478/58974/61587.pdf
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Small-scale variability of the current in the Strait of Bonifacio ArchiMer
Gerigny, Olivia; Coudray, Sylvain; Lapucci, Chiara; Tomasino, Corinne; Bisgambiglia, Paul-antoine; Galgani, Francois.
Current dynamics in the Strait of Bonifacio (south Corsica) were investigated at a small scale during the STELLAMARE1 multidisciplinary cruise in summer 2012, using in situ measurements and modeling data. The Strait of Bonifacio is a particularly sensitive marine area in which specific conservation measures have been taken to preserve the natural environment and wild species. Good knowledge of the hydrodynamics in this area is essential to optimize the Marine Protected Area's management rules. Therefore, we used a high-resolution model (400 m) based on the MARS3D code to investigate the main flux exchanges and to formulate certain hypotheses about the formation of possible eddy structures. The aim of the present paper is first to synthetize the results...
Tipo: Text Palavras-chave: ADCP profiles; Regional model; Hydrodynamic; Corsica current; Strait circulation; North-west Mediterranean basin.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00275/38631/39755.pdf
Registros recuperados: 7
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