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sediment Transport in Rivers and Coastal Waters

China Ocean Engineering 2003年第4期18卷 527-540页

作者：杨树清余建星王元战 School of Civil and Environmental Engineering Nanyang Technological UniversityNanyang Avenue 639798 Singapore School of Civil Engineering Tianjin University Tianjin 300072 China School of Civil Engineering Tianjin University Tianjin 300072 China

Following Bagnold's approach, a relationship between sediment transport and energy dissipation is developed. The major assumption made in the study is that the near bed velocity plays a dominant role in the process of sediment transport. A general relationship between energy dissipation and sediment transport is first proposed. Then the equations for total sediment transport are derived by introducing the appropriate expression of energy dissipation rate under different conditions, such as open channel flows, combination of wave and current, as well as longshore sediment transport. Within the flows investigated, the derived relationships are fairly consistent with the available data over a wide range of conditions.

关键词： total sediment discharge longshore sediment transport rate of energy dissipation wave-current interaction

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sediment TRANSPORT CAPACITY-AN IMPROVED BAGNOLD FORMULA

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International Journal of sediment Research 2007年第1期22卷 27-38页

作者： Sung-Cheol KOH In-Soo KIM Young-Chae SONG

This paper re-examines Bagnold’s theorem of sediment transport. Different from the stream power defined by Bagnold, i.e., τoV, this study shows that the total load of sediment-laden flow, gt, is related to near bed energy dissipation rate, i.e., τou*’. An attempt is made to explain the empirical relation. The ratio (=k) of measured total load, gt, to the product of near bed velocity, u*’, and energy dissipation rate, τou*’, is analyzed. It is found that k is independent of the Rouse number, Z, if Z is greater than 2.6, but the coefficient k decreases with the increase of Z when Z total load with accuracy.

关键词： sediment transport River flow total sediment discharge Stream power

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