Determinate Hydraulic Geometry of River Channels

by Richard D. Hey, Lect.; School of Environmental Sci., Univ. of East Anglia, Norwich, United Kingdom,

Serial Information: Journal of the Hydraulics Division, 1978, Vol. 104, Issue 6, Pg. 869-885

Document Type: Journal Paper


Natural channels have the ability to adjust their flow and bankfull hydraulic geometry in response to flow conditions. Nine governing equations are necessary to define the complete adjustment process and relate channel response to discharge, sediment load, bed, and bank sediment, and the valley slope. A preliminary analysis enables the nature of this process-response model to be identified although insufficient information is known about all the processes for it to be used for design purposes. The necessary dependent and independent variables for the development of empirical design equations are identified by the model and it also confirms the determinate nature of alluvial channels.

Subject Headings: Hydraulics | Geometrics | Channel flow | Bed loads | Alluvial channels | Hydraulic design | Hydraulic models | Water discharge

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