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本文采用坐标正交变换下的二维水流微分方程数值计算法，较好地处理了复杂边界问题，园满地解决了三峡库区长寿段现状及其预测水位下的流场分布计算。
In this paper, the numerical calculation method of two-dimensional water flow differential equation under the orthogonal transformation of coordinates is used to deal with the complex boundary problems well. It fully solves the current situation of Changshou section of the Three Gorges Reservoir area and the calculation of the flow field distribution under the predicted water level.