Abstract
An underground diversion channel is composed of vertical shafts and a tunnel. The continuity and dynamic equations that describe the oscilations of the water level in the vertical shafts, and the discharge and the pressure in the tunnel are derived by considering the motion of the water in the vertical shafts. The numerical method for solving these equations are discussed. The calculated values of the oscillations of the water level in the vertical shafts and the pressure in the tunnel are agreed very well with the experimental values.
