Estimation of Pressure in a Plunge Pool with Rectangular Plunging Jet

The ski jump spillways with ski jump buckets are used commonly to deflect the jet far away in downstream spillways when it is not possible to provide a hydraulic jump type dissipator. The bucket deflects the high velocity jet into the air and discharges into a plunge pool at a considerable distance away from the toe of the dam. To safeguard the dam structure, it is very important to predict the pressure on the plunge pool bed. The characteristics of a jet influences the energy dissipation and pressure on the bed of the plunge pool. In the present study, parameters related to the characteristics of a jet were measured, and pressures on the bed of the plunge pool were estimated with different empirical formulae or plots given by various researchers obtained through experiments or scale models.