Regarding the “runaway ship” accidents during the flood season of navigable rivers in Sichuan Province,it is necessary to reasonably select and construct ship anchorage areas.Based on a mathematical model,this article studies the flow conditions of the river section of Dujiachang Harbor in Minjiang River.The results show that the flow velocity of the main channel of the project section is much greater than that of the anchorage area when the same flow rate is applied.When encountering a 50 year flood,the maximum flow velocity of the main river channel is 6.50 m/s,corresponding to a maximum flow velocity of 1.22 m/s in the anchorage area. As the inflow increases,the growth rate of the flow velocity of the main channel is much greater than that of the flow velocity inside the anchorage area.Under the research conditions,the maximum variation value of the main channel flow velocity is 1.02 m/s,corresponding to a flow velocity variation of 0.19 m/s in the anchorage area.The harbor-type anchorage area of mountainous rivers can effectively meet the requirements for safe docking of ships.