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Tidal exchange between a freshwater tidal marsh and an impacted estuary: the Scheldt estuary, Belgium Van Damme, S.; Dehairs, F.; Tackx, M.; Beauchard, O.; Struyf, E.; Gribsholt, B.; Van Cleemput, O.; Meire, P. (2009). Tidal exchange between a freshwater tidal marsh and an impacted estuary: the Scheldt estuary, Belgium. Est., Coast. and Shelf Sci. 85(2): 197-207. https://dx.doi.org/10.1016/j.ecss.2009.08.005 In: Estuarine, Coastal and Shelf Science. Academic Press: London; New York. ISSN 0272-7714; e-ISSN 1096-0015

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 299472 [ download pdf ]

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Trefwoorden

Chemical compounds > Silicon compounds > Silica Cycles > Chemical cycles > Geochemical cycle > Biogeochemical cycle > Nutrient cycles Freshwaters Mass balance Particulates > Suspended particulate matter Tidal marshes Water bodies > Coastal waters > Coastal landforms > Coastal inlets > Estuaries Belgium: Schelde Marien/Kust; Brak water; Zoet water

Author keywords

Scheldt estuary; mass balance; tidal freshwater marsh; silica; nutrient cycles; suspended particulate matter

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Auteurs		Top
Van Damme, S. Dehairs, F. Tackx, M. Beauchard, O.	Struyf, E. Gribsholt, B. Van Cleemput, O. Meire, P.

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Abstract

Tidal marsh exchange studies are relatively simple tools to investigate the interaction between tidal marshes and estuaries. They have mostly been confined to only a few elements and to saltwater or brackish systems. This study presents mass-balance results of an integrated one year campaign in a freshwater tidal marsh along the Scheldt estuary (Belgium), covering oxygen, nutrients (N, P and Si), carbon, chlorophyll, suspended matter, chloride and sulfate. The role of seepage from the marsh was also investigated. A ranking between the parameters revealed that oxygenation was the strongest effect of the marsh on the estuarine water. Particulate parameters showed overall import. Export of dissolved silica (DSi) was more important than exchange of any other nutrient form. Export of DSi and import of total dissolved nitrogen (DIN) nevertheless contributed about equally to the increase of the Si:N ratio in the seepage water. The marsh had a counteracting effect on the long term trend of nutrient ratios in the estuary.

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