Flow (\( Q = \frac{3.6 \cdot A \cdot X}{\sqrt{Y}} \)):

Where:

• \( Q \) is the discharge, in gallons per minute (gal/min).
• \( A \) is the cross-sectional area at the end of the pipe, in square inches (in²).
• \( X \) is the coordinate of the point on the surface measured in inches parallel to the pipe.
• \( Y \) is the vertical coordinate, in feet (ft).