Abstract: Through the diversion project from Yangtze River to Han River, water will be diverted from Jingjiang River reach of Yangtze River to lower Xinglong reach of Han River so that the negative impact of water quantity decreased in the lower Xinglong reach of Han River can be reduced, and water environment of the river section as well as the condition of water supply of towns and agricultural irrigation can be all improved. The intake of the project will be built at the site where is apart 3.34 km of Juzhang estuary duwnstream of Longzhouyuan reach in upper Jingjiang River stretch of Yangtze River. Through the whole and the local river engineering model experiments, the effects of river course evolution of the intake reach on the water intake after the operation of the Three Gorges Project are studied. Moreover, influences of the project layout on the river regime of intake reach, water level, flow velocity and flow pattern are analysed. Finally, the effects of energy dissipation of stilling basin of the intake sluice, sediment pool, snail  preventing of snail settled pool and so on, are studied. The results may be adopted in the project design.

Key words: water environment compensation  ,   intake  ,  river engineering model  ,   river regime  ,   layout