Abstract:  Cavitation damage of supplementary dissipater is a key problem of hydraulic structures that has
drawn much attention and study efforts. This paper focuses on an analysis of the experimental tests on
cavitation and cavitation damages of supplementary dissipaters in common use. We describe two measures
against cavitation damage: a combined energy dissipater of stilling basin, incomplete flaring gate piers, and
baffle piers; baffle piers with smooth rounded edges. The results show that this combined dissipator can
reduce the flow velocity near the bottom and the forces on baffle piers, increase cavitation number of the
baffle piers, and improve the rate of energy dissipation effectively. If its edges are rounded appropriately, a
baffle pier will has a lower incipient cativition number, the turbulent motions behind it are weakened, and its
cavitation number is increased, improving its resistance against flow cavition.