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Modelling and Analysis of Fine Sediment Transport in Wave-Current Bottom Boundary Layer

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Modelling and Analysis of Fine Sediment Transport in Wave-Current Bottom Boundary Layer by Liqin Zuo
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Description

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.

Author Biography

Liqin Zuo was born in 1980 in Shandong Province, China. He studied Hydrology and Water Resource for his bachelor degree in Hohai University between 1999 and 2003, and subsequently studied Harbor, Coastal and Near-shore Engineering in Nanjing Hydraulic Research Institute (NHRI) from 2003 - 2006 for his postgraduate degree. Liqin has been working in NHRI since 2006, where he was promoted as senior engineer in 2014. He participated a joint research project of NWO-NSFC between the Netherlands and China, for which he started his PhD study in IHE Delft and TU Delft in the Netherlands 2014 - 2018, working on the topic of sediment alluvial process in wave-current bottom boundary layer.
Release date NZ
July 18th, 2018
Author
Country of Publication
United Kingdom
Imprint
CRC Press
Pages
188
ISBN-13
9781138334687
Product ID
28124653

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