The Prediction Of Suspended Sediment Concentration Profiles Over Bedforms On The Beach Face
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Field Observations and Predictions of Bed Shear Stresses and Vertical Suspended Sediment Concentration Profiles in Wave-current Conditions
Author | : J. J. Williams |
Publisher | : |
Total Pages | : 30 |
Release | : 1999 |
Genre | : Sediment transport |
ISBN | : |
Suspended Sediment Concentration Profiles in Wave-current Flows
Author | : J. J. Williams |
Publisher | : |
Total Pages | : 6 |
Release | : 1999 |
Genre | : Suspended sediments |
ISBN | : |
Suspended Sediment Under Waves
Author | : P. Nielsen |
Publisher | : |
Total Pages | : 180 |
Release | : 1982 |
Genre | : Coasts |
ISBN | : |
A new, very simple and dependable field sediment sampler has been developed. It is a multi-siphon device that samples suspended sand from seven elevations simultaneously. The 65 concentration profiles that have been obtained so far are presented, complete with hydrodynamics and bed sediment data. The profiles were measured under breaking and non-breaking waves in a wide rage of coastal environments all over Australia. These data together with a review of oscillatory boundary layer flow and the motion of suspended sand in an accelerated non-uniform flow lead to a range of new insights into the processes of sediment entrainment under waves. (Author).
Suspended Sediment Concentration Profiles in the Bottom Boundary Layer
Author | : Jingping Xu |
Publisher | : |
Total Pages | : 262 |
Release | : 1993 |
Genre | : Suspended sediments |
ISBN | : |
Modelling and Analysis of Fine Sediment Transport in Wave-Current Bottom Boundary Layer
Author | : Liqin Zuo |
Publisher | : CRC Press |
Total Pages | : 188 |
Release | : 2018-06-19 |
Genre | : Science |
ISBN | : 0429794037 |
The evolution and utilization of estuarine and coastal regions are greatly restricted by sediment problems. This thesis aims to better understand fine sediment transport under combined action of waves and currents, especially in the wave-current bottom boundary layer (BBL). Field observations, experimental data analysis, theoretical analysis and numerical models are employed. Silt-dominated sediments are sensitive to flow dynamics and the suspended sediment concentration (SSC) increase rapidly under strong flow dynamics. This research unveils several fundamental aspects of silty sediment, i.e., the criterion of the incipient motion, the SSC profiles and their phase-averaged parameterization in wave-dominated conditions. An expression for sediment incipient motion is proposed for silt-sand sediment under combined wave and current conditions. A process based intra-wave 1DV model for flow-sediment dynamics near the bed is developed in combined wave-current conditions. The high concentration layer (HCL) was simulated and sensitivity analysis was carried out by the 1DV model on factors that impact the SSC in the HCL. Finally, based on the 1DV model, the formulations of the mean SSC profile of silt-sand sediments in wave conditions were proposed. The developed approaches are expected to be applied in engineering practice and further simulation.