【摘要】 本文提出分区域研究弯曲河道水流运动特性的概念．在此基础上，从Ｎ—Ｓ方程出发，对弯曲河道分凸岸和凹岸两个区域分别建立了三维水流流速计算模型，并采用摄动法对模型进行了求解．经美国原型观测资料验证，表明模型精度较高，结果令人满意．更多还原

【Abstract】 A new method of investigating flow characteristics in channel bends is described inthis paper. The channel to be investigated is divided into a number of regions, then,the three dimensional models for calculating flow velocity in the inner bank region andouter bank region are established separately based on the N-S equation. The solutionof these models can be obtained by using perturbation method. The calculation resultsof the new method agree well with the field data observed in the Fall River, in U.S.A..更多还原