Abstract
ABSTRACT The perennial Himalayan rivers provide potential for large scale power generation. Excessive sediment load especially during monsoon is a typical characteristic of such rivers. Flushing of sediment through spillway is an effective technique to control sedimentation. In order to achieve this, spillways with very low crest and very high depth of overflow of the order of 21 m and associated energy dissipation arrangement are envisaged. The present paper describes the hydraulic model studies conducted for Chamera H.E. Project, Stage—II, Himachal Pradesh, to evolve a spillway crest profile free of sub-atmospheric pressure, a stilling basin at the toe of the spillway and power intake alignment to ensure smooth entry of water to the head race system.
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