| Issue |
E3S Web Conf.
Volume 40, 2018
River Flow 2018 - Ninth International Conference on Fluvial Hydraulics
|
|
|---|---|---|
| Article Number | 02059 | |
| Number of page(s) | 6 | |
| Section | River morphodynamics and restoration | |
| DOI | https://doi.org/10.1051/e3sconf/20184002059 | |
| Published online | 05 September 2018 | |
Flow patterns over vegetation patches in the natural channel
1
Pukyong National University, Busan, Rep. of Korea
2
Korea Institute of Civil Engineering and Building Technology, Goyang, Rep. of Korea
3
Korea National University of Transportation, Chungju, Rep. of Korea
4
Deltares, Delft, The Netherlands
* Corresponding author: jiun@kict.re.kr
This study carried out experiments to investigate the effects of vegetation patches of rooted willows on the flow pattern. Stream-scale experiments on vegetated flows were performed for various hydraulic conditions: emergent and submerged conditions of vegetation. Vegetation patches were arranged by alternative bar formation and the flows in vegetated and non-vegetated sections were compared. Three-dimensional flow velocity was measured by ADV (Acoustic Doppler Velocimeter) and ADCP (Acoustic Doppler Current Profiler). Vertical, cross-sectional, and longitudinal velocity distributions were provided for different hydraulic conditions at various points. Flow velocities through the sparse patch were similar to those of non-vegetation area for low flow condition of emergent vegetation. Dense and submerged vegetation produced more complicated and non-uniform flows over the cross-sections of vegetation patches.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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