The discharge through a large vertical rectangular orifice of breadth B when the head of liquid causes flow over the upper and the lower edges is H1 and H2 respectively
1
\(\rm Q =\frac{2}{3}C_d \sqrt{2g}B \left[ H_1^{\frac{3}{2}}- H_2^{\frac{3}{2}} \right] \)
2
\(\rm Q =\frac{2}{3}C_d \sqrt{2g}B \left[ H_2^{\frac{3}{2}}- H_1^{\frac{3}{2}} \right] \)
3
\(\rm Q =\frac{2}{3}C_d \sqrt{2g}B \left[ H_1^{\frac{2}{3}}- H_2^{\frac{2}{3}} \right] \)
4
\(\rm Q =\frac{2}{3}C_d \sqrt{2g}B \left[ H_2^{\frac{2}{3}}- H_1^{\frac{2}{3}} \right] \)