The flip bucket energy dissipater is suitable for sites where the tail water depth is low. It throws the jet of water at a sufficient distance away from the spillway, where a large scour hole would be produced. In this paper results of experiments on scour downstream of a flip bucket are reported. It was found that the maximum depth of scour hole is influenced by the radius of bucket, discharge per unit width of spillway, tail water depth and drop height. Anew empirical equation for prediction of maximum depth of scour is developed which considers the effects of the parameters previously mentioned.
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