Since the impoundment of Three Gorges Ｒeservoir，the river reach from Zhicheng to Yangjianao have suffered from severe erosion． However，it remains unclear how different operation rules for Three Gorges Ｒeservoir affect the erosion and deposition of this river reach． Employing the two－dimensional depth －averaged model for fluvial processes，the present paper systematically investigates the impacts of distinct operation rules for Three Gorges Ｒeservoir on the river reach from Zhicheng to Yangjianao． The results show that under the current operation rule，the river bed is mainly demonstrated to be eroded． It is also estimated that in the 10 years，the river geomorphology will remain stable as the erosion depth of river bed will be close to its limit depth． Although appreciable discrepancies of bed deformations due to different operation rules can be spotted，the river bed exclusively suffer from erosion．