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| Registros recuperados: 13 | |
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| Salomon, Jean-claude; Breton, Marguerite. |
| A two-dimensional mathematical model of the Channel has been used to reveal tide-related advective physical structures, at synoptic time scales. Results show a complete circulation pattern composed of a nearly axial "river" carrying a water flux of about 27,000 m super(3)/s, for an average tide, from the Atlantic to the North Sea and lateral gyres of various intensities, linked to the topography. The modest velocity of the mean flow makes it probably subject to strong temporal modifications by meteorological forcings. Conversely, some strong gyres may play an important role on the residence time of particles and the local memorization of water mass characteristics. |
| Tipo: Text |
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| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00268/37883/35964.pdf |
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| Pommepuy, Monique; Cormier, Michel; Brunel, Laurence; Breton, Marguerite. |
| The purpose of this study is to evaluate the behaviour of the bacterial flora of a macrotidal estuary, originating from different sources: the Elorn freshwater river, a sewage treatment plant (STP), and the sediment. Viable counts were done using severa} culture media in order to determine where bacteria originated. Principal component analysis showed that the estuary was subjected to two well-defined conditions. On the one band, during periods of low turbulence (neap tide), resuspension of bottom sediments did not occur. Bacterial flora decreased from the upper reaches of the estuary to its lower part, coming mainly from two sources (river and STP). As a function of salinity variations, bacterial flora showed a progressive increase of the endogeneous... |
| Tipo: Text |
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| Ano: 1987 |
URL: http://archimer.ifremer.fr/doc/00109/22069/19711.pdf |
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| Breton, Marguerite; Caprais, Marie-paule; Derrien, A.; Douillet, P; Dubois, E; Dupray, E; Gourmelon, Michele; Guillerm, Denise; Kempf, Marc; Lazure, P.; Le Guyader, Soizick; Le Menn, Remi; Menard, Dominique; Pommepuy, Monique; Salomon, Jean-claude. |
| Les départements et territoires d'outre mer sont généralement l'objet d'enjeux économiques importants, et de conflits d'activités liés au développement touristique, aquacole, agricole et industriel. Les études font généralement état d'une lente dégradation de l'environnement marin avec diminution des coraux et de la faune associée, au profit d'une augmentation de la couverture algale. On constate parfois un envasement ou un ensablement des sites, la présence dans l'eau de polluants organiques, dont des pesticides, des métaux ainsi que des microorganismes d'origine fécale. En Martinique, ce dernier aspect, lié à l'assainissement des zones rurales, urbaines et touristiques est actuellement considéré comme une préoccupation majeure pour les prochaines années.... |
| Tipo: Text |
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| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00132/24303/22301.pdf |
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| De Nadaillac, Guy; Breton, Marguerite. |
| Quatre mouillages de deux courantomètres ont été réalisés en baie de Vilaine. Ils ont duré 4 mois et demi. Ils permettent de connaître les courants de marée, les excursions de marée et des schémas de circulation résiduelle. Celle-ci est essentiellement dûe au vent et peut s'inverser pour des conditions m6téorologiques différentes. La présence d'une stratification donne une inversion entre la surface et le fond. |
| Tipo: Text |
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| Ano: 1986 |
URL: http://archimer.ifremer.fr/doc/00080/19108/16703.pdf |
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| Loubersac, Lionel; Salomon, Jean-claude; Breton, Marguerite; Durand, Christophe; Gaudineau, Caroline. |
| This paper presents a set of solutions based on the synergy between GIS and a numerical model to help in diagnosis and decision making for water quality related matters. After an overview of the model features, it describes the computer interface (ModelView) implemented as an extension of the Arc View (ESRI) GIS System to provide operational data communication between the model and the GIS in vector or raster form. The paper particularly focuses on changes in the quality of coastal waters from river discharges. It looks at the spatio-temporal representation of this behaviour and the spatial analysis of sensitive areas that can be impacted. Examples are given of a French coastal area subject to strong human pressure, i.e. marine cultures and recreational... |
| Tipo: Text |
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| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00189/30011/28492.pdf |
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| Registros recuperados: 13 | |
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