应用CE-QUAL-W2模型模拟输水明渠冰盖的研究

以宁夏吴忠地区金积供水工程输水明渠为例,应用CE-QUAL-W2模型(二维纵向垂向平均水动力学和水质模型)进行了输水明渠冰期冰盖生消模拟的可行性研究。在此基础上,计算了南水北调中线京石段典型气温过程中不同入流量和水深条件下的冰盖发展过程,同时对模型参数进行了敏感性分析,研究结果表明:气温、入流量、水深、光遮蔽系数和风剪切系数对冰情有不同程度的影响。

Application of CE-QUAL-W2 to numerical simulation of ice-cover on water conveyance open channel

Taking the water conveyance open channel of Jinji Water Supply Project in Wuzhong District of Ningxia as the study case， the vertical 2-D hydrodynamic and water quality model（CE-QUAL-W2）is applied to the feasibility study made on the simulation of the forming and melting of the ice-cover on the water conveyance open channel during the ice-frozen period. On the basis of this， the ice-over forming process of the Beijing-Shijiazhuang Section of Mid-Route of South-to-North Water Transfer Project is calculated under the conditions of different inflows and water depths during the typical weather process， while a sensitivity analysis is made on the parameters for the model. The study result shows that all the atmospheric temperature， inflow， water depth， dynamic shading coefficient and wind-shearing coefficient have impacts on the ice regime at various scales.