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DESIGN OF SPILLWAY ENERGY DISSIPATOR IN THE FORM OF A SKI-JUMP BUCKET WITH A WEDGE—A CASE STUDY

ABSTRACT Hydraulic model studies were carried out for evolving a suitable design of energy dissipator for spillway of Chandil dam, Bihar. The originally proposed design of the energy dissipator was slotted roller bucket. The model studies with this design indicated the necessity of modifying the design of energy dissipator in order to ensure proper energy dissipation and acceptable flow conditions in the river downstream of spillway. A modified design of the energy dissipator in the form of ski-jump bucket with a wedge near the lip was evolved after extensive hydraulic model studies.