本文从理论上研究了局地风场对夏季长江冲淡水路径变化的效应,主要结果如下:(1)对于长江冲淡水路径变化来说,夏季本区平均风场的效应与底形效应相比可以忽略。(2)当平均风涡度场的效应与底形效应相当时,所得的近似解表明,底形效应将使长江冲淡水的路径向左转向,而局地风场效应只对该路径作微小的订正。 The main results of this study are as follows: (1) For the variation of the Yangtze River’s freshwater path, the average wind field effect in summer in this region is compared with that of the underfloor effect Can be ignored. (2) When the effect of average wind vorticity field is equivalent to the effect of underfloor, the approximate solution obtained shows that the effect of underfloor will turn the path of the red water of the Yangtze to the left, while the effect of local wind field is only tiny Correction.