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Suspended particulate matter dynamics and aggregate sizes in a high turbidity area
Fettweis, M.; Francken, F.; Pison, V.; Van den Eynde, D. (2006). Suspended particulate matter dynamics and aggregate sizes in a high turbidity area. Mar. Geol. 235(1-4): 63-74. dx.doi.org/10.1016/j.margeo.2006.10.005
In: Marine Geology. Elsevier: Amsterdam. ISSN 0025-3227; e-ISSN 1872-6151, meer
Peer reviewed article  

Beschikbaar in  Auteurs 

Trefwoord
    Marien
Author keywords
    SPM; aggregates; flocculation; Kolmogorov microscale; organic matter;

Auteurs  Top 
  • Fettweis, M.
  • Francken, F.
  • Pison, V.
  • Van den Eynde, D.

Abstract
    Measurements of aggregate size, suspended particulate matter (SPM) concentration and current velocity have been carried.out in the Belgian coastal zone (southern North Sea). Two stations were situated in the coastal turbidity maximum zone; another station was located more offshore at the edge of this turbidity maximum. The data have been collected using a LISST 100, OBS sensors, water samples and a bottom mounted ADCP. Turbulence (Kolmogorov microscale) has been modelled for the same period using a 3D numerical model. The results show that the size of the aggregates is significantly smaller in the coastal turbidity maximum area. The processes responsible for the occurrence of smaller aggregate size in the coastal zone compared with the more offshore location are: the higher turbulence; the smaller time available for the aggregates to grow up to an equilibrium size; the higher deposition of mud, resulting in a break-up of the floes and the lower availability of organic matter, which may limit the size of the floes.

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