Pump Discharge Requirement (\( Q \)):

\[ Q = \frac{A \times D}{F \times H} \times 183.4 \]

Where:

• \( Q \) is the pump discharge requirement, in gallons per minute (gpm).
• \( A \) is the design irrigable area, in hectares.
• \( D \) is the depth of irrigation, in inches.
• \( F \) is the number of days permitted for irrigation, in days.
• \( H \) is the average number of hours of operation, in hours per day.