Input Power (\( P_i \)):

\[ P_i = \frac{9.8 \times q \times h}{\xi_p} \]

Where:

• \( P_i \) is the power input delivered to the pump, in kilowatts (KW).
• \( q \) is the discharge rate, in cubic meters per second (m³/s).
• \( h \) is the total head, in meters (m).
• \( \xi_p \) is the pump efficiency, ranging from 0.20 to 0.75.