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Hydrodynamics and sediment dynamics of The Wash embayment, eastern England
Author(s) -
KE X.,
EVANS G.,
COLLINS M. B.
Publication year - 1996
Publication title -
sedimentology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.494
H-Index - 108
eISSN - 1365-3091
pISSN - 0037-0746
DOI - 10.1111/j.1365-3091.1996.tb01465.x
Subject(s) - geology , shoal , bed load , sediment , bedform , submarine pipeline , sediment transport , oceanography , sedimentary budget , hydrology (agriculture) , current (fluid) , seabed , sedimentation , water column , suspended load , geomorphology , geotechnical engineering
Water and sediment movement in The Wash embayment has been determined from an extensive set of data, consisting of tidal current readings and suspended sediment concentration measurements. Instantaneous and residual currents in the embayment show a distinct lateral inhomogeneity, whereas vertically the water column is almost homogenous. The central deep water area (30–40 m) of the embayment is dominated by a residual landward water movement, whilst on the margins, the residual movement is seaward. Sediment is supplied predominantly in suspension from the north, through the northern extremity of Boston Deep. Suspended sediment pathways are coincident with the spring tide water movements and the subtidal channels act as the main conduits. Approximately 6·8 × 10 6 tonnes yr −1 of suspended sediments are supplied to the embayment from offshore areas. Bedload sediment supply is of lesser importance, ∼ 1·4 × 10 4 tonnes yr −1 . Whereas suspended sediment movement appears to be the dominant mode of transport throughout the embayment, bedload transport is important in reforming the sea bed into a variety of bedforms which are particularly well developed on the margins of channels and shoals.