VERBI VEnice Research BIbliography
VERBI VEnice Research BIbliography |
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Solidoro, C., Cossarini, G., & Pastres, R. (2002). Numerical analysis of the nutrient fluxex through the venice lagoon inlets. Scientific Research and Safeguarding of Venice, Corila Research Program 2001 Results, I, 545–555.
Added by: Dott. Alessandro Meggiato (28/05/2014 16:19:18) Last edited by: Dott. Alessandro Meggiato (01/07/2014 16:07:11) |
| Tipo di Risorsa: Articolo di Rivista Chiave di citazione BibTeX: Solidoro2002 Invia la risorsa per email ad un amico View all bibliographic details  |
Categorie: General Keywords: chimica, extend abstract corila, idrodinamica, inquinamento, processi ambientali - Environmental Processes, scambi laguna mare Creatori: Cossarini, Pastres, Solidoro Collezione: Scientific Research and Safeguarding of Venice, Corila Research Program 2001 Results |
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| Abstract |
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Nutrient fluxes through open boundaries greatly influence the evolution of biological compartments and trophic status of the lagoon of Venice. They are nutrient input from the hydrographic network of rivers and channels, from the urban centres and from the industrial area and sewage plants, the exchanges with the atmosphere and the sediment, and the fluxes through the lagoon inlets towards and from the Adriatic Sea. Among these fluxes, the exchanges at the lagoon inlets probably are the less investigated, even if they clearly are of major importance in controlling the evolution of the nutrient content available for the autotrophic communities. This can easily be seen while recognizing that-in term of water fluxes-up to 60% of the lagoon volume is exchanged during a single tide cycle. Nonetheless, so far only a small number of estimations of such fluxes is presently available. Furthermore, these estimations gives contrasting indication, so that doubts persist even on the sign of the fluxes. In this paper we use a pre-existing 3D coupled transport water quality model of the lagoon for assessing time evolution of the exchange fluxes at the three lagoon inlets. Model results show that the lagoon exports nutrient, during almost all the year. A more detailed analysis indicates that there are differences among the three sub-basins. The Northern Sub-basin, which receives the greatest amount of nutrient input from the river basin, export nutrients through the whole year, both through the Lido inlet and towards the Central Subbasin. The Central Sub-basin exports nutrient through the Malamocco inlet during most of the year, while it receives nutrients from the sea in August and September. Exchanges between the Southern and the Central Basins are very small, as to indicate that this subbasin is independent from the other ones. Fluxes through the southern inlets are alternately positive and negative, but always pretty small, indicating a substantially balanced situation for the Southern Basin. Added by: Dott. Alessandro Meggiato |