Hydraulic power

If a pump were an ideal machine, the required input power to drive the pump would
entirely lift the mass flow rate from one elevation to another. This power is called as the
hydraulic power.

Where
Q= capacity in m3 /h
ρ= liquid density in kg/m3 at pumping temperature
H= differential head in m (meters of liquid column)
g= gravitational acceleration in m/s .