长渡槽段水流运动的复合模拟研究

长渡槽具有输水线路长、沿程过水建筑物类型和数量多的特点。为研究其内水流运动要素的空间变化，采用二维数学模型计算存在难以由设计给出的一维糙率系数出发确定二维糙率系数等模型参数的困难,采用三维数学模型计算则过于复杂,采用物理模型试验又不太经济。本文以南水北调中线工程总干渠沙河渡槽为例，采用复合模型技术，即以平面二维数学模型计算为主，综合利用一维、三维数学模型计算与物理模型试验来确定平面二维数学模型中的模型参数，既经济又有效地解决了以上难题。

The Hybrid Simulation Investigation of Flow in the Long Route Aqueduct

Long route aqueducts are usually characterized by long distance,large scale and lots of hydraulic construction .It is difficult to determined 2-D roughnesses by 1-D roughnesses which is given by design if 2-D mathematical model is used alone to study Spatial Variation of flow elements in the long route aqueduct. If it is Calculated by 3-D mathematical model,the model is too complex while model test adopted only is uneconomical. In this paper, the hybrid simulation method which will be built for the main channel of Middle Route of south-to- north water transfer project in Sha River is introduced on the basis of plane 2-D flow mathematical model combined with 1-D flow mathematical model, 3-D flow mathematical model and model test which is used to determine model parameters in the plane 2-D flow mathematical model. The method can tackle problems mentioned above economically and efficiently.