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中文摘要：
长渡槽内水位变化、流速流态等水力特性是工程设计部门甚为关注的问题.南水北调中线一期工程总干渠长约10km的沙河渡槽长宽比大、过水建筑物多等,单独采用物理模型试验进行研究不太经济,单独采用二维甚至三维数学模型进行计算也存在模型参数难以确定的困难,采用复合模拟方法经济有效地解决了以上难题.在设计流量与加大流量的条件下进行计算,得到如下主要成果：沙河渡槽内3个弯道中,鲁山坡落地槽弯道段的横向水面差最大,设计和加大流量工况下分别达0.056m和0.066m;沙河渡槽内水流衔接良好,流态平稳.
英文摘要：
Hydraulic characteristics such as water-level,water flow regime and flow velocity in a long aqueduct are issues of particular concern to engineering design department.The main channel of Middle Route of South-to-North Water Transfer Project in Shahe River is nearly 10 km long,which has several characteristics including large ratio of length to width and amount of water-carrying structures.It is uneconomical to adopt model test only,while it is difficult to determine model parameter when 2D or 3D mathematical model is used alone.In this paper,the hybrid simulation method will be built for the aqueduct which can tackle problems mentioned above economically and efficiently.The main results in the case of design discharge and large discharge are as follows：The transverse difference of water levels of Lushanpo Curve section is the biggest one among the three curved sections in the Shahe River Aqueduct,which is 0.056 m in design discharge and 0.066 m in large discharge;Current joining and water flow regime are smooth in the Shahe River Aqueduct.
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