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What is Forebay and its importance?
Forebay serves as regulating reservoir storing water temporarily during the light load period and providing the water for initial increase of the load during which water in the canal is being accelerated. In simple words Forebay may be considered as enlarged body of water just above the intake to store water temporarily to meet the hourly load fluctuation. When the hrdroelectric plants are located just at the base of the dam, no forebay is required because the reservoir itself serves the purpose of forebay. However, where the plants are situated away from the storage reservoir forebay is provided.