Compute the sequent depth ($y_2$) for a hydraulic jump in a rectangular or trapezoidal channel using the momentum principle.
This tool solves the general momentum equation for the sequent depth ratio $r = y_2 / y_1$ in a trapezoidal channel. The solution corresponds to the roots of the fourth-order polynomial derived by Sadiq Salman (2012):
$$ r^4 + B r^3 + C r^2 + D r + E = 0 $$
Coefficients $B, C, D, E$ are functions of the upstream section factor $k_1 = b / (z y_1)$ and the upstream Froude number $Fr_{D1} = v_1 / \sqrt{g D_1}$, where $D_1$ is the hydraulic depth.
Reference: Salman, S. M. (2012). Characteristics of the Hydraulic Jump in Trapezoidal Channel Section. Journal of Environmental Studies, 9(1), 53-63.
Header image: Viti, N., Valero, D., & Gualtieri, C. (2019). Numerical Simulation of Hydraulic Jumps. Part 2: Recent Results and Future Outlook. Water, 11(1), 28. https://doi.org/10.3390/w11010028