ABSTRACT
Generally, the sharp bend reach of the mountain rivers has rapid water current speed, and the impact of the bridge construction on flood control is usually different from that in other flat rivers. In this paper, based on a verified two-dimensional flow mathematical model, the influence of a bridge on flood control is calculated and analyzed by taking a sharp bend of a mountainous river in the upper reaches of the Han River as an example. The research results show that the flow movement in the sharp bend section of mountainous rivers is relatively rapid, the bridge built downstream has a very limited impact on flood control, and the local velocity and water level changes will not have an adverse impact on flood control.
