Through analyzing the hydrodynamic parameters,the intensity and characteristics of the estuarine flow field at the interface of the mainstream and the tributary of Zhuyi River,a typical tributary in the central area of Three Gorges Reservoir,the flux of water exchange between the mainstream and tributary is calculated. On the basis of the calculation results,the water exchange in different impoundment periods and the influences on the water environment of the reservoir are discussed. The results show that t...