Role of Wave Pressure in Bedload Sediment Transport
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 129, Issue 6
Abstract
Loading from ocean waves propagating in shallow water will normally set some of the bottom sediment in motion, resulting in well-known and far-reaching consequences. In this study, we highlight the role of wave pressure in some of the physical processes taking place at and near the seafloor interface during the propagation of a water wave above. Poroelasticity is used to model the strain in the seabed. Saffman’s slip boundary condition at a fixed porous boundary is extended for a porous bed that is both deformable as well as erodible. The granular flow of the fluidized sediment on the seafloor is modeled as a viscoelastic fluid, with a frequency-dependent complex-viscosity coefficient. A Coulomb-type failure criterion is employed to quantify the magnitude of fluidization under the combined wave shear-and-pressure loading. Nonlinear boundary-layer equations are then solved for the motion of the fluidized sediment and hence provide an estimation of bedload transport by water waves.
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Information & Authors
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Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 129 • Issue 6 • November 2003
Pages: 243 - 249
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Dec 6, 2002
Accepted: May 20, 2003
Published online: Oct 15, 2003
Published in print: Nov 2003
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