Flow (\( q = 0.61 A\sqrt{2gh} \)):

Where:

• \( q \) is the discharge, in cubic meters per second (m³/sec).
• \( A \) is the cross-sectional area of the orifice, in square meters (m²).
• \( g \) is the acceleration due to gravity, approximately 9.81 m/sec² (or 32.2 ft/sec²).
• \( h \) is the depth of water, in meters (m).