reach back
9.Abstract: The influence of Three Gorges project on the water w ay of branch river entrance and waterway problems arising from the project have been investigated and analysed in this paper.Waterway regulation measures have b een studied against the main entrances in the upper reach,the middle reach and t he lower reach of the reservoir alternate back water and the reach ever in back water on the basis of existing research results on branch river entrances in Thr ee Gorges reservoir.The regulation measures can be for reference before regulati on projects are executed.

