Data/hora: 01/06/2024 09:44:11

Provedor de dados: | 5
País: | France
Título: | Rapport final projet Liteau II. Modélisation intégrée des transferts de nutriments depuis les bassins versants de la Seine, la Somme et l'Escaut jusqu'en Manche-Mer du Nord
Autores: | Lefebvre, Alain.
Data: | 2008-05
Ano: | 2008
Palavras-chave: | OSPAR; WFD; Watershed – coastal zone continuum; Modelisation; Eutrophication; Southern bight of the North Sea; English Channel; OSPAR; DCE; Continuum bassin versant – zone côtière; Modélisation; Eutrophisation; Baie sud de la Mer du Nord; Manche.
Resumo: | The main aim of the project was to produce quantitative assessment elements on past and future consequences of nutrient inputs from French and Belgian coastal rivers (Seine, Somme, Escaut) with regards to eutrophication status in the English Channel – North Sea. This project will reinforce implementation of the Water Framework Directive (2000/60/CE), in the context of the 2.1. axis (Definition of ecological status) from APR LITEAU II. This project implements and generalizes to the whole eastern English Channel and the southern bight of the North Sea the results from LITEAU I Programme which allowed the development of this application on the Seine watershed and the Baie de Seine estuary. The method consists in : (i) the simulating the Nitrogen, the Phosphorus and the Silicate biogeochemical cycles on the Somme' and the Escaut' watersheds (as it was done for the Seine), with validation on available in situ data, particularly for the realistic simulation of past changes in nutrient fluxes from the outlet. (ii) forcing the 3D numerical models of the English Channel and the North Sea with this chronicle of simulated fluxes, with validation on recent years of nutrient and phytoplanktonic blooms field distribution. (iii) applicating the models of the three watersheds and from the English Channel and the North Sea to test different scenarios of future change and also to provide a tool for management of the coastal areas and the watersheds connected to the estuary. Results provided an assessment of the pristine situation for the phytoplanktonic production in the English Channel and the North Sea, in concordance with the Water Framework Directive objectives of the definition of actual status with regard to eutrophication and evaluation of the expected situation of the eutrophication status following the reduction target for nutrient inputs from these three main rivers. Simulations allow the quantification of the respective part of the three rivers inputs in inorganic and organic fluxes transported from the English Channel to the North Sea in order to clarify the role of the inputs from French and Belgium areas in the eutrophication process of the North Sea. Historical data sets and modelisation were also used (i) to define water quality indicators (ICEP – Indicator of Coastal Eutrophication Potiential) and (ii) to answer the JAMP product EA-5 of the OSPAR convention about the requirement of an assessment of the expected eutrophication status (including transboundary nutrient fluxes) of the OSPAR maritime area following the implementation of agreed measures.
Tipo: | Text
Idioma: | Francês
Identificador: | http://archimer.ifremer.fr/doc/2008/rapport-6298.pdf
Relação: | http://archimer.ifremer.fr/doc/00000/6298/
Formato: | application/pdf