Determination the Invert Level of a Stilling Basin to Control Hydraulic Jump

Abstract

When water is released over the chutes/spillway, the potential energy is converted into kinetic energy at
the base of chutes. This energy must be dissipated in order to prevent the possibility of sever scouring of
downstream riverbed and the undermining of foundation which may cause failure of spillway and dam.
For this purpose energy dissipators must be used which perform the energy reduction by converting the
kinetic energy into turbulence and finally into heat. The dissipation of energy can be achieved by means
of several methods such as stilling basins. The formation of hydraulic jump in the stilling basin will lead
to dissipation of excess energy. In this study we use a simple method to determine stilling basin invert
elevation in relation to upstream water elevation, design discharge and downstream water/ tail water
elevation. Some solved examples have been provided to exhibit the capabilities of the design procedure.