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Abstract
Seepage through a sand bed affects the channel hydrodynamics, which in turn alters channel stability. Thus, the effect of seepage on its hydrodynamic parameters needs to be ascertained. The present work analyses spatially varied flow of a sand-bed channel subjected to seepage in the downward direction through a sand bed. Numerically calculated flow profiles affected by seepage have been verified using experimental observations. The present work also analyses the friction slope, velocity and bed shear stress variations along the channel for both seepage and no-seepage conditions. It was found that the downward seepage-induced channel flow has larger friction slope and bed shear stress than that of no-seepage.
Acknowledgements
The authors are thankful to the anonymous reviewers and Prof. Dr Willi H. Hager, Editor JHR, for providing helpful comments. The second author gratefully acknowledges the financial support received through a research project from the Ministry of Water Resources, Government of India, through the Indian National Committee on Hydraulic Research, to carry out this research.