| Hydraulic jump is often used in energy dissipation engineering and has been studied by many scholars. It is found that the eigenvalues of a hydraulic jump occurred in a stilling basin which locates the end of a steep are different from the ones obtained acording to the design code. Therefore a systemic study has been done on the hydraulic characteristics of the hydraulic jump mentioned above.The study concerned with the sequent depth of hydraulic jump, length of jump and efficiency of energy dissipation by hydraulic jump under different slope of the chute spillway. By model experiment, combined with dimensional analysis and data fitting, a formula with parameterθwhich stands for the slope of steep was developed. The sequent depth of hydraulic jump, length of jump and efficiency of energy dessipation by hydraulic jump can be calculated by the formula. A general good agreement between the results from the formula and the model experiments data is shown. RGNκ～εmodel and VOF method were used to simulate the hydraulic jumps occurred in the stilling basin which locate the end of a steep under three angles. The mumerical results of flow profile and velocity agree with the model experiment data. It is found that the length of hydraulic jump obtained by design code is less than numerical result, model experiment data as well as the result from the formula which is developed in the paper. A theoretical formula for the calculation of conjugate depths and length of jump is developed. The result of the formula also prove that the sequent depth of hydraulic jump and the length of jump obtained by design code is less than reality.
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