E3S Web Conf.
Volume 40, 2018River Flow 2018 - Ninth International Conference on Fluvial Hydraulics
|Number of page(s)||7|
|Section||Fluid mechanics and sediment processes|
|Published online||05 September 2018|
Two-dimensional Pollutant Transport Simulations in Natural Streams with Horizontal Recirculation Zone
Korea Institute of Civil Engineering and Building Technology, Hydro Science and Engineering Research Institute, Korea
2 Korea Institute of Civil Engineering and Building Technology, Multi Disaster Countermeasures Organization, Korea
1 Corresponding author: firstname.lastname@example.org
In this study, flow and pollutant transport simulations were conducted in the tidal reach of the Han River where the horizontal recirculation zone induced by the tidal cycle causes the storage effect. The flow analysis results show that the flow direction was repeatedly changed due to the downstream water level and the horizontal recirculation zone was occurred at the point where the flow direction was changed. Thus, the pollutant cloud was advected back and forth by the periodically occurred reversal flow. The storage effects of the horizontal recirculation zone cause that the concentration-time curve shows oscillatory increasing patterns, and the retention time of pollutant cloud was also increased.
© 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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