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 : 35th IAHR Congress - Chengdu (2013) : THEME 5 - FLUVIAL HYDRAULICS AND RIVER MANAGEMENT : On the Relation between Bed Friction and Sediment Transport in the Upper Plane Bed Regime
On the Relation between Bed Friction and Sediment Transport in the Upper Plane Bed Regime
Author : V clav Matou?ek and Jan Krupi?ka
In the upper plane bed (UPB) regime, bed friction and sediment transport are interrelated. High bed shear agitates sediment transport and transported sediment can significantly increase bed friction. The log-law for bed friction employs a roughness parameter a size of which is related to the characteristic size of a bed grain. This approach is fine for weak transport of sediment but fails when the transport becomes intense. For intense transport, the bed roughness parameter should be related to the Shields parameter and this may cause troubles in flow computations. A simple method is suggested for predicting the bed friction coefficient using the same parameters for both weak- and intense transport of sediment in the UPB-regime. New experimental material collected in an enclosed rectangular pipe supports considerations used in developing the proposed method.
File Size : 186,209 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Article : THEME 5 - FLUVIAL HYDRAULICS AND RIVER MANAGEMENT
Date Published : 18/07/2016
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