Étude des secteurs du Croisic et de Pen-Bé : estimation des apports continentaux et évaluation des stocks conchylicoles

Autre(s) titre(s) Study on the Croisic and Pen-Bé areas: assessment of continental inputs and conchological stocks.
Type Rapport
Date 2006-03
Langue(s) Français
Référence RST/LER/MPL/06.01
Auteur(s) Gendronneau Maud2, Haure Joel1, Jeanneret Hélène1, Le Merrer Yoann1, Lequette Camille1, Lomakine Cédric3, Martin Jean-Louis1, Papin Mathias1, Ponthoreau Catherine2, Robin Marc3
Mot-Clé(s) Phytosanitary, Bacteria, SIG, Conchological stocks, Modelization, Catchment areas, Continental inputs, Pen B�, Le Croisic
Résumé

Ifremer, Nantes University and the township community "CAP Atlantique" have joined their skills to try to better understand how two key conchological areas in the shore economy of the Pays de la Loire area develop, especially since, environmentally, little is known about them, and because they face recurrent issues on the zootechnic level. This programme encompasses two main topics: assessment of environmental inputs (catchments areas input, contaminants evolution in the area, and impact on the conchological zones) and a study of the conchological culture (growth, mortality, analysis of the stocks). Concomitantly, operational tools (hydrodynamic and flux transfer models, databases, SIG) are developed to improve local management of the sites and information delivery to users. The Pays de la Loire region supported this 240 k¿ (not including labour costs) project from 2002 to 2004. Conclusions have been drawn on the basis of the final results (Scientific and Technological Body, June 2005): - Innovative development of operational tools: modelling of the inputs through the catchment areas with a coupling SIG/ agro-pedological model (subject of a doctoral basis presented in May 2005), hydrodynamic modelling of the pollutant evolution, and first attempt to couple a land model and a marine model; - Creation of a database on water quality in the peninsula of Guerande that helps improving information delivery to users and exchanging data with the other data producers; - Creation of a protocol for flow follow-up and first assessment of phytosanitary product impacts. - First assessment of conchological culture, with possible definition of cultural methods according to the different area potentialities; - contribution to research structuring in the Pays de la Loire Region for a further collaboration between Ifremer and Nantes University on the « Sea, estuary and shore » programme. The several integrated data, collected from the catchment areas to the channels, provide information managers can use to optimize the space and several socio-economical activities. It is now possible to assess the contamination risks stemming from the catchment areas and foresee the evolution of the pollutants in the channels, a progress that could lead to corrective actions to improve water quality and guarantee durability for each use. We can now contemplate transferring the developed methodology to other areas (baie de Bourgneuf for instance), in collaboration with all the local partners.

Keyword(s) Phytosanitary, Bacteria, SIG, Conchological stocks, Modelization, Catchment areas, Continental inputs, Pen B�, Le Croisic
Résumé en anglais

Ifremer, Nantes University and the township community "CAP Atlantique" have joined their skills to try to better understand how two key conchological areas in the shore economy of the Pays de la Loire area develop, especially since, environmentally, little is known about them, and because they face recurrent issues on the zootechnic level. This programme encompasses two main topics: assessment of environmental inputs (catchments areas input, contaminants evolution in the area, and impact on the conchological zones) and a study of the conchological culture (growth, mortality, analysis of the stocks). Concomitantly, operational tools (hydrodynamic and flux transfer models, databases, SIG) are developed to improve local management of the sites and information delivery to users. The Pays de la Loire region supported this 240 k¿ (not including labour costs) project from 2002 to 2004. Conclusions have been drawn on the basis of the final results (Scientific and Technological Body, June 2005): - Innovative development of operational tools: modelling of the inputs through the catchment areas with a coupling SIG/ agro-pedological model (subject of a doctoral basis presented in May 2005), hydrodynamic modelling of the pollutant evolution, and first attempt to couple a land model and a marine model; - Creation of a database on water quality in the peninsula of Guerande that helps improving information delivery to users and exchanging data with the other data producers; - Creation of a protocol for flow follow-up and first assessment of phytosanitary product impacts. - First assessment of conchological culture, with possible definition of cultural methods according to the different area potentialities; - contribution to research structuring in the Pays de la Loire Region for a further collaboration between Ifremer and Nantes University on the « Sea, estuary and shore » programme. The several integrated data, collected from the catchment areas to the channels, provide information managers can use to optimize the space and several socio-economical activities. It is now possible to assess the contamination risks stemming from the catchment areas and foresee the evolution of the pollutants in the channels, a progress that could lead to corrective actions to improve water quality and guarantee durability for each use. We can now contemplate transferring the developed methodology to other areas (baie de Bourgneuf for instance), in collaboration with all the local partners.

Texte intégral
Fichier Pages Taille Accès
Rapport 119 6 MB Libre accès
Annexes 148 6 MB Libre accès
Haut de la page

Comment citer 

Gendronneau Maud, Haure Joel, Jeanneret Hélène, Le Merrer Yoann, Lequette Camille, Lomakine Cédric, Martin Jean-Louis, Papin Mathias, Ponthoreau Catherine, Robin Marc (2006). Étude des secteurs du Croisic et de Pen-Bé : estimation des apports continentaux et évaluation des stocks conchylicoles. RST/LER/MPL/06.01. https://archimer.ifremer.fr/doc/00380/49129/