Type choice of gates is an important work of barrage construction. By computing and analyzing

we obtain the following results: ①comprehensively considering various aspects such as terrain

geology

watercourse and construction etc

an open-flat- bottom barrage with plane gate and stationary hoisting device should be chosen; ② the length of the axis of a barrage should be 626 m. As an open flat barrage

the bottom board elevation is 579.9 m and 29 gate openings will be set up; and the size of each gate openings will be 19×4.1m (width x height).