Open Channel Flow

In a horizontal rectangular stilling basin, the initial depth before a hydraulic jump is $y_1 = 0.2\text{ m}$ with Froude number $Fr_1 = 3.0$. The sequent depth $y_2$ (in m) after the jump is: (using $y_2 = \frac{y_1}{2} \left(\sqrt{1 + 8 Fr_1^2} - 1\right)$)