藻类在大连湾的水环境行为数值模拟研究

Simulation study on phytoplankton behavior in water environment in Dalian Bay

应用三维水质模型对大连湾水体中的藻类碳浓度的时空变化规律以及其影响因素进行了研究,选择主要的模型参数进行了灵敏度分析。由空间分布的模拟结果可知,在大连湾,藻类主要集中在排污口附近区域。由季节变化模拟结果可知,在湾顶部的排污口区藻类生产显示明显的季节变化趋势,在夏季,主要受到磷酸盐浓度的限制。灵敏度分析显示,在排污口区水体的扩散能力对藻类生产的影响较大,在湾中部和湾口区主要受到磷酸盐负荷的影响。模拟结果可以为大连湾的污染控制、水质规划和管理提供科学依据。

In this paper the water quality modal.was applied and developed to simulate the phytoplankton behavior in Dalian Bay. Beyond the spatial and temporal distribution of phytoplankton, sensitivity analysis was conducted. The major factor controlling the distribution of the phytoplankton concentrations was diffuse process in Bay tip and the mouth was phosphate loads in Bay mid. The simulation results of the special distribution and asasenal change showed that the algal concentration was accumulated in Bay tip and was affected by phosphate concentration in later spring and summer. These could be belpful for the controlling pollution and mAnning water quality in Dalian Bay .