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AGIL/BN - Aide à la Gestion Intégrée du Littoral en Basse-Normandie - Bilan des travaux 2012 ArchiMer
Le Gendre, Romain; Riou, Philippe.
Dans le cadre d’une convention multi partenariale, le Laboratoire Environnement Ressources s’est vu confier la maîtrise d’ouvrage du projet « AGIL BN ». Son objectif est de développer des outils et compétences permettant d’élaborer des aides à la prise de décision en matière d’aménagement et de gestion de l’environnement littoral en Basse-Normandie. Il comprend 2 grands volets : - développement d’un Système d’Information Géographique « environnement littoral », avec mise en ligne d’un atlas électronique « état des lieux » accessible à tous à partir du site WEB de l’Ifremer ; - développement d’un réseau de modèles hydrodynamiques couvrant l’ensemble du littoral Bas- Normand, et permettant de réaliser des simulations d’impact de différents aménagements,...
Tipo: Text Palavras-chave: Littoral de Basse-Normandie; Environnement et aménagement littoral; Outils d’aide à la décision; SIG; Modèles hydrodynamiques.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00289/40013/38595.pdf
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Les problèmes d'eutrophisation littorale et leur modélisation ArchiMer
Menesguen, Alain.
Following lakes and rivers, a lot of estuaries (during the last twenty years) and shallow coastal zones (during the last decade) have been severely eutrophicated because of the too much increasing loads of nitrogen and phsophorus. In situ stutdy and numerical modelling of two french case studies bring some explanation to the facts that, in some sites, enrichment turns into green macroalgal proliferation whereas, in others, mass blooms of phytoplankton are induced. Whatever the case may be, the prominent role of the residence time of water in the enriched zone has been proven. In open coastal ecosystems, the difficulty in determining this residence time as well as the limiting factor (nitrogen, or phosphorus, or light) lowers considerably the reliability of...
Tipo: Text Palavras-chave: Eutrophisation côtière; Elément limitant; Temps de résidence; Modèles hydrodynamiques; Modèles écologiques; Coastal eutrophication; Limiting factor; Residence time; Hydrodynamical models; Ecological models.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/00423/53416/54295.pdf
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L'utilisation de modèles écologiques dans la lutte contre l'eutrophisation des eaux côtières françaises ArchiMer
Menesguen, Alain.
Increasing anthropogenic nitrogen and phosphorus loadings in some coastal areas have induced during the last twenty years excessive production of algal material, either phytoplanktonic or macrophytic. This so-called eutrophication phenomenon alters the usual structure of ecosystem and can lead to massive kills caused by anoxia in some extreme cases, when almost all the dissolved oxygen in bottom waters has been consumed by organic matter decomposition. Just behind the semi-enclosed lagoons, the most sensible areas are the dilution plumes of main rivers. In the case of French coasts, mediterranean lagoons have been eutrophicated for a long time, whereas the coastal areas of the Bay of Biscay and English Channel have been partially preserved by the strong...
Tipo: Text Palavras-chave: Ecological models; Hydrodynamical models; Residence time; Limiting factor; Phytoplankton blooms; Green tides; Coastal eutrophication; Modèles écologiques; Modèles hydrodynamiques; Temps de résidence; Elément limitant; Eau colorée; Marée verte; Eutrophisation côtière.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/1999/rapport-144.pdf
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