Flow structures in a two-stage channel with a mobile bed

• Published in: Journal of hydraulic research Vol. 42; no. 2; pp. 145 - 162
• Main Authors: Wormleaton, P. R., Sellin, R.H.J., Bryant, T., Loveless, J.H., Hey, R.D., Catmur, S.E.
• Format: Journal Article
• Language: English
• Published: Delft Taylor & Francis Group 01-01-2004; International Association for Hydraulic Research
• Subjects: channel morphology; Earth sciences; Earth, ocean, space; Exact sciences and technology; floodplain flow; Freshwater; Hydrology. Hydrogeology; meandering streams; primary and secondary velocities; River channel flow; British Isles; British Isles, England, Oxford, Wallingford; rivers; floods; models; canals; sampling; velocity; flow structures; sand; hydraulics; channels; plains; particles; meanders
• ISSN: 0022-1686; 1814-2079
• DOI: 10.1080/00221686.2004.9728378

A large scale model hydraulic study of inbank and overbank river flow, using a regular sinuous river channel with a mobile bed, was carried out in the UK Flood Channel Facility at Hydraulics Research, Wallingford. The sediment chosen for this investigation had a wide range of particle sizes present, covering the fine sand to coarse sand range. Measurements were made of three-dimensional velocity distributions and bed profiles at cross-sections around the meander. These measurements were used to determine the structure of the flows around the meander and the interaction between main channel and floodplain flows. These flow structures were related to changes in the bed profiles and to bed material sorting.