The mean suspended sediment concentration profile of silty sediments under wave-dominant conditions

Liqin Zuo, Dano Roelvink, Yongjun Lu

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Suspended sediment concentration (SSC) is one of the fundamental topics in sediment study. The parameterization of the SSC profile of silty sediments is still under-researched. This study focuses on the mean SSC profile for silty sediments under non-breaking wave-dominant conditions. First, inspired by a 1DV model, different types of the distribution of mean eddy viscosity were proposed, i.e., a toe-type distribution over flat bed and a constant-toe type distribution over rippled bed. Then, the time-averaged diffusion equation for suspended sediment transport was analytically solved, and expressions for the mean SSC profiles were derived. The expressions involve several basic physical processes, including the effects of bed forms, stratification, hindered settling and mobile bed. Verification using a number of experimental datasets showed that the proposed expressions can properly calculate the mean SSC for silt and are applicable for sand as well. In conclusion, this research provides an approach to estimate the mean SSC for silty sediments under wave-dominant conditions, which is expected to be applicable for engineering practice and numerical modelling.
Original languageEnglish
Pages (from-to)111-126
Number of pages16
JournalContinental Shelf Research
Volume186
DOIs
Publication statusPublished - 2019

Keywords

  • Eddy viscosity
  • Flat bed
  • Rippled bed
  • Sediment concentration profile
  • Sediment diffusivity
  • Silty sediment

Fingerprint Dive into the research topics of 'The mean suspended sediment concentration profile of silty sediments under wave-dominant conditions'. Together they form a unique fingerprint.

  • Cite this