Abstract:In order to study the influence of Ji′an cruise ship manufacturing and maintenance project on the river potential and flood control in the study area, this paper uses MIKE21 software to establish a two-dimensional mathematical model of water flow, combined with the analysis of river evolution, hydrological analysis and calculation, as well as the analysis of hydrological characteristics of the engineering river section, engineering geology and other information, to make a comprehensive evaluation of the construction of the project for flood control. The results show that the construction of the project has little influence on the river congestion, and the water level changes mainly concentrate in the areas near the project. The maximum value of water level congestion caused by the project is 5.78 cm; in the upstream local area,the water level is reduced by excavation, and the maximum value of reduction is 10.20 cm; the maximum value of reduction of flow velocity is 0.85 m/s, and the maximum value of increase of flow velocity is 0.53 m/s; the river channel of the project will continue to maintain the development trend of the overall river potential which is basically stable at this stage. Under the condition that the water and sand conditions do not change significantly in the future, the river bank will remain relatively stable in a certain period of time in the future.