Hydraulics and Fluid Mechanics in ME
The discharge over a rectangular notch is (where b = Width of notch, and H = Height of liquid, above the sill of the notch)

(2/3) Cd × b × √(2g) × H3/2
(2/3) Cd × b × √(2g) × H
(2/3) Cd × b × √(2gH)
(2/3) Cd × b × √(2g) × H2

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Hydraulics and Fluid Mechanics in ME
Runaway speed of a hydraulic turbine is

The speed corresponding to maximum overload permissible
The speed at which turbine runner will be damaged
The speed if the turbine runner is allowed to revolve freely without load and with the wicket gates wide open
Full load speed

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