In order to demonstrate the water environment quality in the artificial waterway of Villa Project in Sri Lanka,a comparative study has been done on the layout plan of the artificial waterway,and a numerical simulation research has been conducted from the perspective of water exchange capacity.Based on the hydrodynamic and pollutant convection diffusion model in the MIKE21 model software,the tidal current field and pollutant concentration field in the sea area where the artificial waterway is located has been simulated.The water exchange situation of the artificial waterway has been simulated by the method of tracer transport diffusion.The water exchange capacity of each sub area of the artificial waterway has been evaluated using the turn-over time as an indicator,and the effectiveness of two plans have been analyzed.The results show that the internal tidal current field of the artificial waterway is mainly controlled by the rising and falling tides.However,due to the small tidal range in the study sea area and the fact that the artificial waterway is a semi-closed and narrow water body,the current speed of the artificial waterway decreases along the way from the mouth to the end.Except for the two sub areas near the mouth,the turn-over time in the remaining sub areas is relatively long and the water exchange capacity is poor;After optimizing the layout of the artificial waterway through excavation of channels,the turn-over time in all sub areas is significantly shortened,and the water exchange capacity is improved.
维普
万方数据
