IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 32nd Congress - Venice (2007) : THEME A: Engineering and Management of Fresh-water Systems : Modelling sediment transport in rectangular channels using a depth-averaged velocity approach
Modelling sediment transport in rectangular channels using a depth-averaged velocity approach
Author : Mazen Omran, Serter Atabay, Donald W. Knight
The phenomenon of sediment transport has an important role in hydraulic engineering. The sediment concentration in channels is often determined from equations that are based on the boundary shear stress or shear velocity. However, the distribution of boundary shear stress around the wetted perimeter of a channel is itself hard to determine. The current paper proposes a modeling philosophy based on a depth-averaged model (Shiono and Knight Method) to determine the boundary shear stress distribution in simple rectangular channels with rigid and mobile beds. The approach links the perturbation in the boundary shear stress distributions to the presence of secondary current cells and divides the channel accordingly. The philosophy is validated against experimental data and accurate boundary shear stress distributions were obtained. Despite this accuracy in the boundary shear calculation, the analytical sediment concentrations underestimated the experimental ones. This conclusion was also found when using other sediment transport equations.
File Size : 172,704 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 32nd Congress - Venice (2007)
Article : THEME A: Engineering and Management of Fresh-water Systems
Date Published : 01/07/2007
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