Development of a Sediment Pickup Function with Effect of External Turbulence and Integrated Model for Sediment Transport

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A new model of sediment pickup rate accounting for effects of breaking-wave induced turbulence was developed for better predictions of coastal mophodynamics. A series of laboratory experiments were conducted to investigate the relationship between nearbed flow characteristics and sediment pickup under different flow conditions with turbulence supplied from above. New measurement techniques were attempted for quantification of sediment fluxes as well as fluid forces acting on the bed. The experimental results suggested the positive relationship between the turbulence intensities and the pickup rate, from which a new pickup model was formulated.