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Dec 31, 2015
Sediment Transport on the South-East Australian Continental Shelf
Authors: Angus D. Gordon and John G. HoffmanAuthor Affiliations
Publication: Coastal Engineering 1984
Abstract
Engineering projects on the continental shelf off Sydney, Australia, have stimulated investigation into the sediment transport system of the shelf. Investigation activities associated with these projects have included: definition of sea bed morphology, sediment distribution and bedform characteristics; monitoring of steady and wave induced currents; wind data collection; suspended sediment sampling; bottom camera sediment movement investigations and analytical studies of sediment reaction to sea bed forcing functions. Sea bed velocity exceedence relationships for both wave oscillations and steady currents have been determined at depths of 24 m, 60 m and 80 m. Thresholds of sediment movement have been defined. Relative sediment transport computations have been undertaken and studies of suspended sediment concentration profiles are in progress so that absolute transport rates can be determined. The prevailing conditions, which include a mainly south bound current, are seldom sufficient to induce entrainment of shelf sediments. Transport events mainly result from major storms in the Tasman Sea which produce both high energy waves and north bound currents. Although these events are rare and short lived, the combined wave and current shear produced at the sea bed during the events gives rise to entrainment conditions which result in their dominance of the shelf sediment transport system.
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© 1985 American Society of Civil Engineers.
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Published online: Dec 31, 2015
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Angus D. Gordon
Coastal Branch, N.S.W. Public Works Department, 140 Phillip Street, Sydney, N.S.W. 2000, Australia.
John G. Hoffman
Coastal Branch, N.S.W. Public Works Department, 140 Phillip Street, Sydney, N.S.W. 2000, Australia.
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