Vertical Distribution of Sediment Under Waves

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by Shang-yi Wang, Tianjin Univ, Tianjin, China,
Xi Chen, Tianjin Univ, Tianjin, China,

Document Type: Proceeding Paper

Part of: Coastal Engineering Considerations in Coastal Zone Management:

Abstract: This paper is based on the research foundation of vertical relative distribution of sediment concentration and alluvial bed stability under waves. Amended theories of E. W. Lane and A.A. Kalinske have been utilized to have carried out analysis and research to determine the value of sediment concentration Ca on the surface of bed layer, thus a complete set of numerical calculation modelling of the vertical distribution of sediment concentration under waves is set up. By theoretical inference mentioned above there may be three vertical distribution patterns of sediment concentration in nature: (i). Concentration is lower at the upper surface, higher at middle depths, and the highest at greater depths, (ii). Concentration is higher at the upper surface, lower at middle depths, and the lowest at greater depths and (iii). Concentration is higher at the upper surface, lower at middle depths and higher again at greater depths. Finally utilizing the 'North Sea' data of Germany collected by H.Wang; the 'Black Sea' data from E.I. Mass of Russia; the laboratory data measured by P. A. Hwang in the USA; Nielsen and Green's Australian field data and the accomplishments of analysis and research of the Tianjin New Harbor data of China by Shangyi Wang and Deshan Ma, verification to the above mentioned modelling has been carried out. The results testify that this theory and calculation modelling are reasonable and identical with practical condition.

Subject Headings: Sediment | Data analysis | Alluvial channels | Data processing | Mathematical models | Bed materials | Surface waves | Germany | Black Sea | North Sea | Europe

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