CRITICAL REVIEW OF STILLING BASIN MODELS FOR PIPE OUTLET WORKS

Abstract

When water released from an outlet in reservoir whether from gate, valves or tunnels or conduits and over spillway, it attains high velocity. This high velocity is generated by virtue of changing its potential head from the reservoir level to the level of the river on the downstream. This higher velocity causes scouring downstream structure. To safe guard against such scouring, suitable stilling basin are designed, in which energy of flowing water is reduced. In this paper, different types of stilling basin models designed by past investigators are presented with their appurtenances and these models are compared on the basis of stilling basin length.