Determination of Settling Velocity of Suspended Sediment in Estuary

Abstract:

The settling velocity of sediment is a hot issue and a basic problem in study of sediment transport and estuarine engineering. According to field hydrodynamics and sediment data around the South Passage of the Changjiang River in China, this paper detected the characteristics of sediment particle size and vertical distribution pattern of suspended sediment concentration, and further estimated the settling velocity of suspended sediment in three methods. The results show that the sediments including suspended and bed load can be categorized into cohesive sediments and the sediment concentration profile agree well with logarithmic distribution. Furthermore, by comparison, it is found that the Rouse formula is more reasonable for estimating the settling velocity of fine sediment, but the Zhang Ruijin and Stokes formula obviously underestimate the values of settling velocity, caused by do not taking into account the flocculation of fine sediment in estuary.

• Periodical: Applied Mechanics and Materials (Volumes 670-671)
• Pages: 805-808
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.670-671.805
• Online since: October 2014
• Authors: Hui Ming Huang*, Da Ke Chen, Wei Na Zhang, Cheng Chen
• Keywords: Estuary, Particle Size, Profile of Sediment Concentration, Settling Velocity

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