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 : Sediment erosion at an upstanding step change in bed level
Sediment erosion at an upstanding step change in bed level
Author : Carravetta Armando, Della Morte Renata
The removal of sediment deposits from a fixed bed has large implications in sewer and open channel design. Large modifications in flow field and bottom stress may be determined by the presence of the sediment deposit itself for the abrupt change of the bed level and roughness. If velocity profiles within the internal boundary layer determined by the boundary variation have been modeled with log-law, the presence of a sudden peak in shear velocity downstream the bed change is observed, the so-called overshooting. In order to assess the relevance of overshooting on sediment removal, specific experiments have been addressed on the flow field modification and on the related sediment erosion. The results of such experiments are discussed and a comparison has been performed between the critical shear velocities for sediment motion and overshooting shear velocity values.
File Size : 213,231 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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