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Monitoring the effects of disposal of fine sediments from maintenance dredging on suspended particulate matter concentration in the Belgian nearshore area (southern North Sea)
Fettweis, M.; Baeye, M.; Francken, F.; Lauwaert, B.; Van den Eynde, D.; Van Lancker, V.; Martens, C.; Michielsen, T. (2011). Monitoring the effects of disposal of fine sediments from maintenance dredging on suspended particulate matter concentration in the Belgian nearshore area (southern North Sea). Mar. Pollut. Bull. 62(2): 258-269. dx.doi.org/10.1016/j.marpolbul.2010.11.002
In: Marine Pollution Bulletin. Macmillan: London. ISSN 0025-326X; e-ISSN 1879-3363
Peer reviewed article  
Available in  Authors 
Keywords
    Disposal
    Dredged materials
    Dredging
    Fluid mud
    Monitoring
    Suspended sediments
    ANE, Belgium, Belgian Coast [Marine Regions]
    Marine/Coastal
Author keywords
    Dredged material disposal; Dredging; Fluid mud; SPM concentration; Suspended sediments; Monitoring
Authors  Top 
  • Fettweis, M.
  • Baeye, M.
  • Francken, F.
  • Lauwaert, B.
  • Van den Eynde, D.
  • Van Lancker, V.
  • Martens, C.
  • Michielsen, T.
Abstract
    The impact of continuous disposal of fine-grained sediments from maintenance dredging works on the suspended particulate matter concentration in a shallow nearshore turbidity maximum was investigated during dredging experiment (port of Zeebrugge, southern North Sea). Before, during and after the experiment monitoring of SPM concentration using OBS and ADV altimetry was carried out at a location 5 km west of the disposal site. A statistical analysis, based on the concept of populations and sub-sampling, was applied to evaluate the effect. The data revealed that the SPM concentration near the bed was on average more than 2 times higher during the dredging experiment. The disposed material was mainly transported in the benthic layer and resulted in a long-term increase of SPM concentration and formation of fluid mud layers. The study shows that SPM concentration can be used as an indicator of environmental changes if representative time series are available.
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