Author(s): Gopu Sreenivasulu; Achanta Ramakrishna Rao; Bimlesh Kumar; Saurabh Tripathi

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Keywords: Incipient motion; resistance equation; seepage; shear stress; spatially varied flow

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.

DOI: https://doi.org/10.1080/00221681003704293

Year: 2010