Develop expressions to calculate bottom elevation of stilling basin and conjugate depths of hydraulic jump

Abstract

     Currently the determination of stilling basin depth is done by iteration method based on the assumption that outflow from the basin occurs as the flow over broad crested weir. The dimensions of stilling basin are determined in order to guarantee there will be submerged hydraulic jump within the basin. With the aim of simplifying the calculation and ensuring the basin works well, this paper has proposed the formulas instead of iteration method for calculating bottom elevation of stilling basin. According to this study, the ratio of sequent depths and the Froude number before the hydraulic jump are linearly related, and bottom elevation of stilling basin can be promptly calculated by calculator CASIO fx-570ES.