平面二维高精度水质输移数学模型及其应用  

High-accuracy Two-dimensional Mathematical Model of Water Quality Transport and its Application

作　　者：朱宝土[1] 史英标[1,2] 穆锦斌[1,2] 程文龙[1,2] 

机构地区：[1]浙江省水利河口研究院,浙江杭州310020 [2]浙江省河口海岸重点实验室,浙江杭州310016

出　　处：《中国农村水利水电》2010年第1期47-50,55,共5页China Rural Water and Hydropower

摘　　要：在平面二维三角形网格有限体积法求解水流模型的基础上,建立了高精度水质输移数学模型,并用具有解析解的对流输移经典算例对模型进行了验证,结果表明该模型具有守恒性好,精度高等优点。最后将该模型应用于钱塘江河口上游突发性水污染事故的动态模拟,对突发事故的影响范围、程度、时间作出了定量预报,评估了突发事故对饮用水源地取水口水质的影响,为钱塘江河口上游水域突发性水环境污染事故的应急预案提供指导。A high-order transport model is established based on the triangle unstructured shallow flow model and finite volume meth- od. The model is examined by a sample with exact solution for physical concentration. A comparison between computed results and exact solution demonstrates very good agreement. Finally, the model is applied to simulate the diffusing and moving proeesses of pol- lutants from the burst water-pollution accident under different hydrological conditions. The model can quantitatively predict the reac- hing time and concentration of pollutants, and evaluate the effects of the burst water-pollution aceident on the water-intake in the Qiantang estuary. The predicted results are basically reasonable and a scientific guideline is offered for emergency management of sudden water contamination accidents.

关 键 词：水质模型 有限体积法 三角形网格 对流扩散方程 Roe数值格式 突发性水污染 

分 类 号：TV131.2[水利工程—水力学及河流动力学]