基于潮波运动三维数值模拟的海岸带污染负荷模型研究

Pollution Load Model for Coastal Zone Based on 3-D Numerical Simulation of Tidal Wave Motion

为准确评估海洋生态环境,分析海岸带污染负荷情况,提出基于潮波运动三维数值模拟的海岸带污染负荷模型。运用潮流控制方程与湍流封闭方程组建三维潮波运动定向方程组,建立潮波自由表面、垂直方向及海岸线边界条件,明确海岸带的潮位与潮流,引入灰色预测方法,构建不同的海岸带污染负荷模型。实验结果表明,所建模型能准确分析海岸带周边污染状况,生活废水与工业废水污染负荷呈总体上升趋势,旅游废水污染负荷所占比重最少,畜禽养殖废水污染存在潜在隐患。

In order to provide a reliable basis for the comprehensive assessment of marine ecological environment,this study proposed a coastal zone pollution load model based on three-dimensional numerical simulation of tidal wave motion.Based on the tidal current control equation and turbulence closed equation,the three-dimensional tidal wave movement directional equations are established.The free surface,vertical direction and coastline boundary conditions of tidal wave are established,and the tidal level and tidal current change in the coastal zone are clarified according to the pollution characteristics of the coastal zone and its Nearshore Area.The gray prediction method is used to construct the coastal zone pollution models of industry,life,tourism,agriculture,livestock and poultry breeding,respectively.Load model can effectively solve the problem of environmental system uncertainty caused by lack of data or unclear coupling.The simulation results show that the model can accurately analyze the pollution situation around the coastal zone.The pollution load of domestic wastewater and industrial wastewater shows an overall upward trend.The proportion of tourism wastewater pollution load is the least,and there are potential risks in livestock wastewater pollution.