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Sediment resuspension events induced by the wake wash of deep-draft vessels

AuthorsGarel, Erwan; López Fernández, Laura ; Collins, Mike
Issue DateAug-2008
CitationGeo-Marine Letters 28(4): 205-211 (2008)
AbstractHydrodynamics and sediment resuspension events, induced at the shoreline by a deep-draft vessel passing nearby, are described. Measurements (pressure, currents and turbidity) were obtained at 4 Hz, on a lower beach ∼50 m from a channel where large car ferries operate in Wootton Creek, Isle of Wight. The study focuses on a representative 8-min 32-s-long record, during which two large vessels passed the channel section. At the shore, the passage of each vessel induced a long-period water-level drawdown, followed by a water-level oscillation (seiche) of similar period, and the short-period waves of the wake. Both drawdowns were the main constituents of the prevailing wave pattern. The second drawdown was the largest in amplitude, in response to a higher speed of the ferry, and the influence of the seiche which had been activated during the preceding event. Two successive peaks of turbidity were observed shortly after this drawdown. Analyses of current velocity and direction indicate that the sediments resuspended originated from the shallower upper beach. Anthropogenically induced erosion of the foreshore is predicted at Wootton Creek. © Springer-Verlag 2008
Description7 pages, 2 figures, 2 tables
Publisher version (URL)https://doi.org/10.1007/s00367-008-0101-y
Identifiersdoi: 10.1007/s00367-008-0101-y
issn: 0276-0460
e-issn: 1432-1157
Appears in Collections:(ICM) Artículos
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