Data/hora: 01/06/2024 00:43:01

Provedor de dados: | 5
País: | France
Título: | Simulation de l'effet de 3 scénarios de réduction des teneurs de l'Elorn en nitrate sur l'eutrophisation de la rade de Brest
Autores: | Menesguen, Alain.
Data: | 2007-12-03
Ano: | 2007
Palavras-chave: | Mathematical model; Dinoflagellate; Diatom; Ulva; Green tide; Nitrate; Moulin Blanc cowe; Elorn river; Bay of Brest; Modèle mathématique; Dinoflagellé; Diatomée; Ulve; Marée verte; Nitrate; Anse du Moulin Blanc; Elorn; Rade de Brest.
Resumo: | This study commissioned by the Syndicat de l'Elorn et de la Rivière de Daoulas aimed at assessing on a mathemical modelling basis the impact of 3 scenarios of reduction of the loadings of Elorn river (imposed concentrations : 20, 15 et 10 mg/L NO3) on the status of ulva mass proliferation in the Moulin Blanc cowe (Bay of Brest). An ecological 3D model of N, P and Si cycling in the bay of Brest has been applied to a "reference situation": 2004 meteorological forcing combined to recent loadings of the new sewage plant. This model showed that: · the 3 reduction scenarios did not reduce significantly the early summer biomass of ulvae, but allowed to slightly reduce the subsequent summer and autumn levels of biomass (up to 20% reduction for 10 mg/L NO3). The theoretical total removal of nitrate in the Elorn river does not suppress the ulva gree tide, which maintains at a lower biomass feeding on nitrate brought by sources different from Elorn river.  · every nitrate reduction scenario brings a quasi-proportional reduction of summer dinoflagellate bloom intensity in the Elorn estuary.
Tipo: | Text
Idioma: | Francês
Identificador: | http://archimer.ifremer.fr/doc/2007/rapport-6327.pdf
Relação: | http://archimer.ifremer.fr/doc/00000/6327/
Formato: | application/pdf