Impact of Flexible Emergent Vegetation on Open-Channel Velocity Distribution in a Compound Channel
摘要
It is crucial to comprehend the flow dynamics in a compound channel with vegetated floodplains. In the present study, artificial vegetation (bladed type) is selected for the experimental work. The vegetation is placed in a staggered manner with equal longitudinal and lateral spacing. Two cases, flow through a compound channel in (a) No vegetation and (b) Homogeneous vegetation has been considered. The velocity measurements are performed using Acoustic Doppler Vectrino profiler (ADVP). It was observed that because of the existence of homogeneous vegetation covering the floodplains, increase in velocity in the main channel in comparison to no vegetation. Owing to the interchange of momentum between the main channel and floodplains and resistance offered vegetation over the floodplains lower the velocity in the floodplains which promote the sediments deposition in the vegetated floodplains.