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General description of the Scheldt estuary Baeyens, W.F.J.; Van Eck, B.T.M.; Lambert, C.; Wollast, R.; Goeyens, L. (1997). General description of the Scheldt estuary. Hydrobiologia 366: 1-14. https://dx.doi.org/10.1023/A:1003164009031 In: Hydrobiologia. Springer: The Hague. ISSN 0018-8158; e-ISSN 1573-5117, meer Is gerelateerd aan: Baeyens, W.F.J.; Van Eck, B.T.M.; Lambert, C.; Wollast, R.; Goeyens, L. (1998). General description of the Scheldt estuary, in: Baeyens, W.F.J. (Ed.) Trace metals in the Westerschelde Estuary: a case-study of a polluted, partially anoxic estuary. Developments in Hydrobiology, 128: pp. 1-14. https://dx.doi.org/10.1007/978-94-017-3573-5_1, meer

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 121759 [ download pdf ]

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Trefwoorden

ANE, Netherlands, Westerschelde Westerschelde [Marine Regions] Marien/Kust

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Auteurs		Top
Baeyens, W.F.J. Van Eck, B.T.M. Lambert, C.	Wollast, R. Goeyens, L.

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Abstract

A general description of the Scheldt estuary, including the hydrology, the sediment transport, the productivity and the biodegradation with respect to their influence on the trace metal behaviour in the Scheldt estuary, is given. The river basin can be divided in several sections according to their morphological, hydrodynamical and sedimentary properties. The zone from km 78 to 55, which corresponds roughly with the salinity zone from 2 to 10 psu, is the zone of high turbidity, high sedimentation and of oxygen depletion, especially in the summer period. That area is called the geochemical filter because the solid/dissolved distribution of the trace metals is controlled by redox, adsorption/desorption, complexation and precipitation/coprecipitation processes. The sedimentation rate in that area is estimated at 280 Mkg y-¹. In the downstream estuary the phytoplankton activity increases due to the restoration of oxygen and to the much lower turbidity values. That area is called the biological filter because incorporation of trace metals by the plankton communities lowers the trace metal concentrations during the productivity period, while transformation of metal species, especially observed with mercury, occurs during that period too.

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