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- Title
Grain-Size Trend Analysis for the Determination of Non-Biogenic Sediment Transport Pathways on the Kwinte Bank (southern North Sea), in Relation to Sand Dredging.
- Authors
Poulos, Serafim E.; Ballay, Arnaud
- Abstract
Grain-size trend analysis is applied to the determination of sediment transport pathways over the Kwinte Bank, southern North Sea; which had been subjected to intensive dredging, within the context of the environmental impact of dredging activities. On the basis of the results of grain-size trend analysis, focused mainly upon the transportation of the non-biogenic sedimentary material (<2 mm), it appears that: (i) there is a main sediment pathway over the western (bank crest) and central (dredged area) part of the bank directed toward the NE; whilst a secondary pathway is established over its eastern gently-sloping flank, having a SE direction. Further, the present analysis shows that the area of the central (dredged) depression acts more as a `by-passing' zone rather than as a depo-centre for the non- biogenic sediments. Comparison undertaken with the results of an earlier investigation, for a non-dredged area at the northern end of the same bank, reveals that the depression due to dredging modifies significantly the sediment transport pathways; this may be attributed to a change in the seabed morphology which, in turn, modifies the near- bed hydrodynamics (related to tide and/or storm events).
- Subjects
NORTH Sea; SEDIMENT transport; DREDGING; MINERAL aggregates; ENVIRONMENTAL impact analysis; OCEAN bottom
- Publication
Journal of Coastal Research, 2010, p95
- ISSN
0749-0208
- Publication type
Article
- DOI
10.2112/S151-009.1