Engineering :: Fluid Mechanics and Hydraulic Machines

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To determine the reservoir storage capacity for a given uniform demand, one of the following data is most useful:

[A].	Unit hydrograph of the basin	[B].	Stage discharge relation for the stream at the reservoir site
[C].	Daily flow-duration curve of the stream at the dam site	[D].	Mass curve of the flow volume for several consecutive years

Answer: Option D