基于Delft3D模型对深圳湾近岸海域污染物迁移模拟

Simulation of Pollutant Migration in the Coastal Area of Shenzhen Bay Based on Delft3D Model

以深圳市深圳湾近岸海域为研究对象,基于Delft3D软件,建立深圳湾三维水动力水质耦合模型。利用实测数据对模拟结果进行验证,分析深圳湾海域水质时空变化规律。模拟结果表明,深圳湾内的污染物浓度整体较高,浓度分布受潮汐变化敏感性强,不仅受各污染源点源强与流量的影响,而且受湾内的潮汐动力影响,污染物浓度值总体从湾口向湾顶逐渐增大,浓度梯度由外向内递增。

Based on Delft3D software,a three-dimensional model of coupled hydrodynamics and water quality in Shenzhen Bay was established.The measured data were used to verify the simulation results,and the temporal and spatial variation of water quality in Shenzhen Bay was analyzed.The simulation results showed that the concentration of pollutants in Shenzhen Bay was relatively high on the whole,and the concentration distribution was highly sensitive to tidal changes.It was not only affected by the point source strength and discharge of all pollution sources,but also by the tidal dynamics in the bay.The concentration of pollutants gradually increased from the mouth to the top of the bay,and the concentration gradient increased from the outside to the inside.