复杂河网水系油粒子模型开发及溢油污染模拟

近年来,油粒子模型在海洋、海湾等水体的二、三维溢油数值模拟中获得广泛应用.然而,河网地区的水流模拟通常采用一维水动力模型,无法根据模型预测结果判断油粒子运动至河网节点后的流动方向,导致现有油粒子模型不能应用于河网水系溢油污染模拟.本研究针对水网地区溢油输移特征,通过定义河网节点出流河道流向因子,判断油粒子运动至河网节点...

Development of the oil particle model for complex river network and numerical simulation of oil spill pollution

In recent years, the oil particle model has been widely used in the two-dimensional and three-dimensional numerical simulation of oil spill accidents in oceans,bays and other water bodies. However,the one-dimensional hydrodynamic model is usually used to simulate the flow movement of the river network. It is impossible to determine the flow directions of oil particles after they move to the nodes of the river network according to the model prediction results. As a result, the existing oil particle model cannot be applied to the simulation of oil spill pollution in river network. In this study, based on the characteristics of oil slick transport in the river network area, an oil particle model-based simulation method for river network area is proposed by defining the flow direction factors of outflow channels and determining the flow directions of oil particles. The modified oil particle model was applied to simulate the oil spill pollution of Taipu River, a main water transfer channel in Taihu Basin. The results show that the flow direction factor method can appropriately simulate the transport and distribution process of oil particles in the complex river network. The oil particle model based on the flow direction factor method is applicable for oil spill simulation in river network areas with complex river system structure and changeable flow conditions. The research results have great theoretical value and application prospect for improving the early warning and emergency response capacity of oil spill risk complex river network areas.