Chapter
Apr 26, 2012
Sediment Transport in Response to Wave Groups Generated by High-Speed Vessels
Authors: Philip D. Osborne [email protected], Neil J. MacDonald [email protected], and Shaun Parkinson [email protected]Author Affiliations
Publication: Coastal Sediments '07
Abstract
Suspended sediment transport dynamics occurring at relatively short time scales under super-critical wave groups created by moving high speed vessels are investigated by means of field measurements and the application of numerical models. Examples are provided from a variety of different environments, including predominately sandy beaches in low energy estuarine and fluvial settings. Model simulations combining the hydrodynamics of the wakes with steady currents and a sand transport model provide results that are largely consistent with field measurements and observations of the suspended load fraction. Wakes re-suspend sand in the nearshore that would otherwise be immobile and move it incrementally offshore and alongshore, eventually into deeper water where stronger ambient flows (tidal or fluvial) can transport the sediment. Super-critical wakes from high speed vessels have a tendency to cause offshore transport of sand-sized sediment leading to beach flattening while their sub-critical counterparts often lead to beach steepening.
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© 2007 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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Pacific International Engineering, PLLC, 123 Second Ave. South, P.O. Box 1599, Edmonds, WA, 98020. E-mail: [email protected]
Pacific International Engineering, Corp, 260 Centrum Blvd., Ste 220, Ottawa, Ontario, Canada, K1E 3P4. E-mail: [email protected]
Idaho Power Company, P.O. Box 70, Boise, ID, 83707. E-mail: [email protected]
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