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Sediment Dynamics in a Laboratory Channel with Bank Vegetation

Author(s): S. Gorrick; Jose F. Rodriguez

Linked Author(s): José Rodríguez

Keywords: Sediment transport; Deposition; Vegetation; Laboratory experiments

Abstract: Vegetation has a large influence on flow, sediment transport processes and deposition patterns in rivers. This paper investigates sediment dynamics, consisting largely of suspended load in a laboratory channel with bank vegetation. The laboratory experiments were conducted in a reduced Froude scale model of a sand bed stream, set up in a flume with a constant sediment feed. Bed load and deposition patterns were measured with a 5 MHz ultrasonic bed profiler and suspended sediment concentrations were measured with direct sampling. Prior hydrodynamic characterisation performed over a fixed bed is used in the analysis. Bank vegetation was found to increase deposition of fine sediment with potential mechanisms for the deposition explained and discussed in this paper.


Year: 2011

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