DONATE

IAHR Document Library


« Back to Library Homepage « Journal of Hydraulic Research 1999 Issue 5

Incipient sediment motion with upward seepage

Author(s): Nian-Sheng Cheng; Yee-Meng Chiew

Linked Author(s):

Keywords:

Abstract: This study investigates the effect of upward bed seepage on the critical condition of incipient sediment motion in open channel flow both analytically and experimentally. The critical condition was derived by analyzing the forces acting on a sediment particle lying on a permeable horizontal bed subject to seepage. The ratio of the critical shear velocity with seepage to that without seepage depends on the ratio of theJiydraulic gradient of seepage to its critical value under the quick condition. Experimental results concerning incipient motion of cohesionless uniform sediments in open channel flow show that for a particular size of sediment, the critical shear velocity decreases with increasing seepage velocity. All measurements generally support the theoretically derived expression of the critical shear velocity in the presence of an upward seepage.

DOI: https://doi.org/10.1080/00221689909498522

Year: 1999

Copyright © 2024 International Association for Hydro-Environment Engineering and Research. All rights reserved. | Terms and Conditions