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On the threshold of transport of sand-sized sediment under the combined influence of unidirectional and oscillatory flow

Collins, Michael, Ferentinos, George and Banner, F.T. (1979) On the threshold of transport of sand-sized sediment under the combined influence of unidirectional and oscillatory flow Estuarine Coastal and Marine Science, 8, (1), pp. 49-74. (doi:10.1016/0302-3524(79)90105-1).

Record type: Article


Swansea Bay may be taken as an example of an embayment which has a complex and variable hydrodynamic regime resulting from the interaction of its bathymetry and configuration with an adjacent rectilinear, semidiurnal tidal system and with superimposed oceanic swell and more locally generated seas.

Eulerian tidal current observations in Swansea Bay indicated a coastal tidal current pattern which has developed from the main currents along the northern Bristol Channel. The observed pattern consists of an anticlockwise eddy in the western part of the embayment and a zone of divergence on the eastern side, between the eddy and the main offshore flow. Wave data, as represented by refraction diagrams and the distribution of sea bed orbital velocities, have demonstrated that high energy wave conditions prevail over the area. Sediment distribution and transport in Swansea Bay are controlled by tidally and wave-induced current patterns, but are also related to bathymetry and the exposure of relict deposits. However, evidence is presented to suggest that local dredging activities influence the sedimentation processes.

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Published date: January 1979
Keywords: sediment distribution, sediment transport, tidal currents, wave action, benthic environments, Bristol Channel, Wales coast


Local EPrints ID: 201589
ISSN: 0302-3524
PURE UUID: 836a9afb-44dd-4fa6-aa78-8ee1fd15f96d

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Date deposited: 28 Oct 2011 15:45
Last modified: 18 Jul 2017 11:12

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Author: Michael Collins
Author: George Ferentinos
Author: F.T. Banner

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