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Sediment Transport Due to Turbidity Currents

by Chung-Po Lin, Coastal Technology Corp, United States,
Ashish J. Mehta, Coastal Technology Corp, United States,



Document Type: Proceeding Paper

Part of: Sediment Transport Modeling

Abstract:

The processes of sediment transport in a horizontal channel due to low-Reynolds-number turbidity currents are evaluated. A multiple-layer numerical model was developed to predict the flow velocity, suspension concentration and sediment deposition in the channel. Experiments were conducted at laboratory to verify the numerical prediction. In a total of 11 tests, fine-grained sediments including kaolinite, flyash and Cedar Key mud were used to generate turbidity currents. The behavior of turbidity currents and related phenomena are governed by the ratio of the particle settling velocity to densimetric velocity. Mean concentration below the interface and deposition rate in the channel show an exponential-type decrease with distance.

Subject Headings: Turbidity | Sediment transport | Fluid velocity | Numerical models | Settling velocity | Sediment | Particle velocity

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