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Experiment Study of Gravels Stability With Barely Submerged and Submerged Foliage Plants

Author(s): Muxi Bao, Jianfeng Tao

Linked Author(s): Muxi Bao

Keywords: Open-channel flow, vegetation patches, foliaged plants, channel stability

Abstract: A better understanding of the flow characteristics through emulation plants would facilitate more effective river restoration and wetlands engineering. In this experiment, we investigate the flow structure around foliaged plants deployed in a channel with gravels on the bed under 3 conditions. Velocity data was collected with Acoustic Doppler Velocimetry (ADV) Vectrino (NORTEK). For the barely submerged flow and small bed slope case, the velocity speed up at the near-bed region. The associated Reynolds stress and TKE at the bed are larger than those for the submerged flow and small bed slope case. Compared to the barely submerged flow and large bed slope case, the difference in velocity, Reynolds stress and TKE are small. The results indicate that the presence of barely submerged foliage plants can enhance the channel bed instability and the water depth is a more important factor than bed slope that affect the gravels stability

DOI:

Year: 2017

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