Numerical simulation for influence of building Xin'andu bridge on river flood control

In order to raise the train speed at Hu-Han-Rong Railway line,the department of railway plans to build the Xin'andu bridge at the Lunhe River on Han-Dan Railway line.Building a bridge at Lunhe River will influence the natural water level and velocity near the project.For analyzing the influence of Xin'andu bridge on flood control,the paper builds a 2-D non-orthogonal curvilinear coordinate flow mathematical model which applied to the Lunhe River.The computational results show that there is no obvious influence on water level and velocity in the Lunhe River after the construction;so the project will not bring disadvantageous influence on flood control basically.