Suspension drop flow type plunge pool energy dissipation system

The invention discloses a suspension drop flow type plunge pool energy dissipation system. The suspension drop flow type plunge pool energy dissipation system comprises multiple levels of plunge pools arranged at different-elevation positions of a lateral mountain of a dam body of a water reservoir and an upstream diversion canal enabling water in the water reservoir to be led out. A water outlet of the upstream diversion canal is located above the upstream of the plunge pool with the highest elevation, the horizontal projection parts of every two adjacent levels of plunge pools are overlapped, overflow weirs are formed in the lateral walls of the higher-elevation plunge pools located on the horizontal projections of the lower-elevation plunge pools, water in the higher-elevation plunge pools is made to drop into the lower-elevation plunge pools through the overflow weirs, the horizontal projection of the lowest-elevation plunge pool and the horizontal projection of a downstream watercourse are partially overlapped and an overflow weir is formed in the lateral wall of the lowest-elevation plunge pool located on the horizontal projection of the downstream watercourse. The energy dissipation system is suitable for narrow river valleys and small-flow high-water-head water conservancy projects with downstream watercourses narrowing gradually, can improve the energy dissipation efficiency and project safety and economy, and reduce the difficult level of project layout.