An experiment is designed to investigate the influence of the depth of energy dissipation in energy dissipation well on the hydraulic parameters. In the middle of the test flow, diameter of the stilling well D,ventilation hole diameter d, height h, short pressure ratio of export lambda is fixed, by changing the energy dissipation, effect of depth on the flow pattern, pressure and non-uniformity of deep wells is investigated. Through the comparative analysis of the pulse pressure and the system energy dissip...