Abstract
ABSTRACT The perennial Himalayan rivers provide potential for large scale hydro power generation. These rivers carry heavy sediments because of steep slopes and young geology consisting of soft, friable rock. This is further aggravated by the seismic character of the Himalayan zone. The rivers during flooding time carry with them lot of sediment which ultimately gets collected in the reservoir. Spillways in Himalayan region are designed for handling both flood releases and flushing of the sediment. Breastwall/sluice spillways have been widely recognized as the most appropriate spillways for dual purpose of flood disposal and flushing of sediment. Present paper describes the hydraulic model studies conducted for Sewa dam spillway, to study the suitability of spillway by assessing the discharging capacity of spillway, performance of stilling basin, flow conditions upstream, downstream of spillway and in front of power intake.
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