Aquatic Sciences Meeting, Albuquerque 2001

SS31 Integrated Approaches to Drainage Basin Nutrient Inputs and Inland/Coastal Eutrophication (Science and Society Connections)

Date: Thursday, February 15, 2001, Time: 12:15:00 PM

Location: Cimarron

Lancelot, C, , Université Libre de Bruxelles, Brussels, Belgium, lancelot@ulb.ac.be

Garnier, J, , Université P. et M. Curie, Paris, France, jgarnier@biogeodis.jussieu.fr

Staneva, J, , University of Sofia, Sofia, Bulgaria, joana@phys.uni-sofia.bg

Beckers, J, M, Université de Liège, Liège, Belgium, JM.Beckers@ulg.ac.be

Billen, G, , Université P. et M. Curie, Paris, France, gbillen@biogeodis.jussieu.fr

LINKING COASTAL PROCESSES TO LAND USE: AN INTEGRATED RIVER-OCEAN MATHEMATICAL TOOL. APPLICATION TO THE DANUBE AND THE NORTH WESTERN BLACK SEA

We present an integrated modeling approach of the Danube-Black Sea continuum to investigate the non-linear nature of the link between human activities and the structure and function of the coastal ecosystem. The numerical tool consists of the coupling of a marine ecosystem model to a biogeochemical model of the river system. The latter model results of the coupling of an hydrological module based on an idealization of the drainage network structure with a mechanistic module describing the major biogeochemical and ecological processes affecting carbon and nutrients. Based on a realistic description of the kinetics of the processes involved, the same ecological module is extended for describing higher trophic levels (including gelatinous) in the marine system. The complex marine ecosystem model is implemented in a 0D-1D hydrodynamical framework. Model results are validated for the conditions of 1988-1991 corresponding to the most intense period of eutrophication. Model scenarios for the 1994 period allow to better understanding links between the observed improvement of coastal ecosystem, the decreasing trend in the Danube nutrient loads and the recent socio-economical changes which occurred within the watershed.

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Aquatic Sciences Meeting, Albuquerque 2001

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