Research School for Socio-Economic and
Natural Sciences of the Environment
Research School for Socio-Economic and
Natural Sciences of the Environment
Agenda

Liqin Zuo

Date: 04 June 2018
Location: Delft

Dissertation title: 

Modelling and analysis of fine sediment transport in wave-current bottom boundary layer

Group: IHE Delft, Coastal Systems and Engineering and Port Development
Promotor: Professor Dano Roelvink

Abstract:

The evolution and utilization of estuarine and coastal regions are greatly restricted by sediment problems. This study aims to better understand silty sediment transport under combined action of waves and currents, especially in the wave-current bottom boundary layer (BBL), and to improve our modelling approaches in predicting estuarine and coastal sediment transport. Field observations, experimental data analysis, theoretical analysis and numerical models are employed. An expression for sediment incipient motion was proposed for silt-sand sediment under combined wave and current conditions. A process based 1DV model was developed for flow-sediment dynamics near the bed 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 suspended sediment concentration (SSC) in the HCL. Finally, based on the 1DV model, the formulations of the mean SSC of silty sediments in wave conditions were proposed.