Data/hora: 09/06/2024 05:27:43

Provedor de dados: 	27	
País: 	Belgium	
Título: 	A time-dependent flow model for heavy metals in the Scheldt estuary	
Autores: 	De Smedt, F.; Vuksanovic, V.; Van Meerbeeck, S.; Reyns, D.	
Data: 	1998	
Ano: 	1998	
Resumo: 	The main processes that determine the behaviour of heavy metals in the Scheldt estuary are tidal hydrodynamics, sediment transport, and sorption of heavy metals on suspended matter. The water quality model WASP is applied to simulate the spatial distribution of five heavy metals in the estuary, under average hydrodynamic and suspended sediment transport regimes. First, the hydrodynamical part of the model is constructed and the results are verified by comparison with measured water levels and flow velocities. Secondly, a salt transport model is set up in order to evaluate the hydrodynamical dispersive mixing characteristics. Thirdly, a suspended sediment transport model is constructed and finally a transport model for heavy metals. The simulated distributions of the sorbed amounts of heavy metals, suspended sediment and salinity in the estuary agree well with observations. The calculated profiles of dissolved and sorbed concentrations of heavy metals in the water column indicate an accumulation of heavy metals in the zone of the turbidity maximum, while closer to the sea the concentrations diminish due to mixing of the polluted fluvial sediments with unpolluted marine sediments and because of sediment deposition in the estuary. It can be concluded that only a small part of the heavy metals reaches the sea.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7065	
Relação: 	info:eu-repo/semantics/altIdentifier/wos/000075822400011	
Fonte: 	%3Ci%3EHydrobiologia+366%3C%2Fi%3E%3A+143-155	
Fonte: 	info:eu-repo/semantics/restrictedAccess