Two berths of Liaojiadang wharf locate in backwater variation zone of the Three Gorges reservoir in the Yangtze River,which are affected by the upstream stone beams in Kuzhubei,thus the water conditions are very complicated.On the basis of analysis of river bed evolution,water conditions and navigation conditions,we propose safety measures which limit ships to berth during different periods.The main research results are as follows:the channel of waterway of wharf project is stable;during the dry season,i.e.,from November to the end of April of the next year,when the Three Gorges reservoir runs in high water level manner,the water conditions of the wharf keeps feasible,it can berth 2 rows of ships at most;during other months,i.e.,from May to October,the water condition of the wharf runs in natural states,it can berth one row of ships at most;when floods occur,the flowing properties become deteriorated in rough 100 m range near the Kuzhubei site to affect the navigation of the Liaojiadang wharf,thus during floods months,i.e.,from June to September,the ships are prohibited at the upper berth of the wharf.