<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The condition of incipient motion and deposition are of the essential issues for the study of sediment transport. This phenomenon is of great importance to hydraulic engineers for designing sewers, drainage, as well as other rigid boundary channels. This is a study carried out with the objectives of describing the effect of cross-sectional shape on incipient motion and deposition of particles in rigid boundary channels. In this research work, the experimental data given by Loveless (1992) and Mohammadi (2005) are used. On the basis of the critical velocity approach, a new incipient motion equation for a V-shaped bottom channel and incipient deposition of sediment particles equations for rigid boundary channels having circular, rectangular, and U-shaped cross sections are obtained. New equations were compared to the other incipient motion equations. The result shows that the cross-sectional shape is an important factor for defining the minimum velocity for no-deposit particles. This study also distinguishes incipient motion of particles from incipient deposition for particles. The results may be useful for designing fixed bed channels with a limited deposition condition.</p></abstract>

The condition of incipient motion and deposition are of the essential issues for the study of sediment transport. This phenomenon is of great importance to hydraulic engineers for designing sewers, drainage, as well as other rigid boundary channels. This is a study carried out with the objectives of describing the effect of cross-sectional shape on incipient motion and deposition of particles in rigid boundary channels. In this research work, the experimental data given by Loveless (1992) and Mohammadi (2005) are used. On the basis of the critical velocity approach, a new incipient motion equation for a V-shaped bottom channel and incipient deposition of sediment particles equations for rigid boundary channels having circular, rectangular, and U-shaped cross sections are obtained. New equations were compared to the other incipient motion equations. The result shows that the cross-sectional shape is an important factor for defining the minimum velocity for no-deposit particles. This study also distinguishes incipient motion of particles from incipient deposition for particles. The results may be useful for designing fixed bed channels with a limited deposition condition.

On the effect of cross sectional shape on incipient motion and deposition of sediments in fixed bed channels

Faculty of Civil Eng., Istanbul Technical University, Istanbul, Turkey.

. of Civil Eng., Faculty of Eng., Urmia University, Urmia, Iran

Dept. of Nano Science and Nano Eng., Istanbul Technical University, Istanbul, Turkey.

Journal of Hydrology and Hydromechanics

The condition of incipient motion and deposition are of the essential issues for the study of sediment transport. This phenomenon is of great importance to...

On the effect of cross sectional shape on incipient motion and deposition of sediments in fixed bed channels

Publié en ligne: 13 févr. 2014

Pages: 75 - 81

DOI: https://doi.org/10.2478/johh-2014-0003

This content is open access.