Journal
MARINE POLLUTION BULLETIN
Volume 62, Issue 2, Pages 258-269Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2010.11.002
Keywords
Dredged material disposal; Dredging; Fluid mud; SPM concentration; Suspended sediments; Monitoring
Funding
- Maritime Access Division of the Ministry of the Flemish Community
- Belgian Science Policy within the framework of the QUEST4D [SD/NS/06A]
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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 two 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. (C) 2010 Elsevier Ltd. All rights reserved.
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