Hydraulics and Fluid Mechanics in ME
According to Manning's formula, the discharge through an open channel is (where M = Manning's constant)

A × M × m1/2 × i2/3
A × M × m2/3 × i1/2
A2/3 × M1/3 × m × i
A1/2 × M2/3 × m × i

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Hydraulics and Fluid Mechanics in ME
Stanton diagram is a

semi-log plot of friction factor against relative roughness
log-log plot of relative roughness against Reynolds number
semi-log plot of friction factor against Reynolds number
log-log plot of friction factor against Reynolds number

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Hydraulics and Fluid Mechanics in ME
Manometric head, in case of a centrifugal pump, is equal to

All of these
Suction lift + Loss of head in suction pipe due to friction + Delivery lift + Loss of head in delivery pipe due to friction + Velocity head in the delivery pipe
Energy per kN at outlet of impeller Energy per kN at inlet of impeller
Work-done per kN of water Losses within the impeller

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