Discharge (\( Q = \frac{453 \cdot A \cdot D}{F \cdot H} \)):

Where:

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