Author(s): Jyotismita Taye; Bimlesh Kumar

Linked Author(s): Jyotismita Taye, Bimlesh Kumar

Keywords: Sinuous channel; Downward seepage; Sediment transport

Abstract: Flow through sinuous channels show altered flow characteristics, unlike in straight channels. Channels form curves or bends in its course and the boundaries are vulnerable to different stresses. There is also exchange of water between the surface and the sub-surface flow, known as seepage. With downward seepage, the water percolate through the boundaries of the channel and join the nearby groundwater table. River engineers usually neglect this condition in channels because the amount of seepage velocity may be of small quantity as compared to the free stream velocity above the sediment bed. However, this small seepage velocity has the potential to exert extra hydrodynamic force on the sediment bed. Laboratory experiments was conducted to assess the flow without seepage and with downward seepage and to provide better understanding of the hydrodynamics and sediment transport in a sinuous channel. The activity of seepage is mostly near the channel bed where the transfer of water takes place. Morphological changes were observed to alter with the effect of downward seepage. The results of the study provides the potential of the downward seepage in altering the flow characteristics and enhance sediment transport in alluvial sinuous channels.

DOI: https://doi.org/10.3850/IAHR-39WC252171192022338

Year: 2022