- Title
- Mobile bed experiments in a reduced scale model of a sand bed stream with bank vegetation
- Creator
- Gorrick, S.; Rodriguez, J. F.
- Relation
- 6th Symposium on River, Coastal and Estuarine Morhodynamics (RCEM2009). RCEM2009: 6th Symposium on River, Coastal and Estuarine Morhodynamics (Santa Fe, Argentina 21-25 September, 2009) p. 595-600
- Relation
- http://www.unl.edu.ar/rcem2009
- Publisher
- Taylor & Francis Group
- Resource Type
- conference paper
- Date
- 2010
- Description
- Vegetation is an important factor affecting stream flow and sediment dynamics in natural rivers and is commonly used in restoration projects. This paper presents the results of mobile bed experiments conducted in a 1:15 scale model of a sand bed stream with and without bank vegetation. Two lightweight sediments were used to achieve approximate similitude. Sediment was fed into the channel at constant rate under bankfull flow conditions. Ultrasonic bed profiling and isokinetic samples were used to measure bed load and suspended load. The results are combined with flow measurements recorded in separate experiments with a fixed bed With bank vegetation bed load transport increased over the opposite bank following the redistribution of bed shear stresses. Suspended sediment concentrations increased near the vegetated bank due to increased turbulence at the shear layer. When the flow was stopped at the end of the experiments fine sediment deposits were observed along the vegetated bank.
- Subject
- vegetation; river banks; sediment; stream flow
- Identifier
- http://hdl.handle.net/1959.13/933659
- Identifier
- uon:11685
- Identifier
- ISBN:97870415554268
- Language
- eng
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