Abstract:The Xiangshan hydro-junction locates on the main branch of the terminal section of Ganjiang River,and is a navigable river control junction.It is particularly important to properly deal with the navigable problem during the construction period.Therefore,a corresponding navigation scheme should be proposed according to the stage construction plan.During the first stage of the project,a temporary channel will be used for navigation,while the ship locks will be used in the second stage.This article focuses on the navigable flow conditions of the temporary channel during the first phase.The flow patterns under different flow conditions are calculated and analyzed by establishing a two-dimensional FVM hydrodynamic mathematical model.The results show that the water depth and velocity of the temporary channel in the first stage of the project meet all the relevant requirements.