Abstract
A hydraulic jump is a characteristic phenomenon in open channel flow. Downstream of block ramps or rock chutes a hydraulic jump can occur over a rough bed with a great energy dissipation. This paper analyses the hydraulic jump that occurs in homogeneous and non homogeneous rough bed channels. The parameters that influence the sequent flow depth and the length of the jump were systematically investigated. The analysis of the phenomenon was conducted using the general jump equation. The experimental data were elaborated in order to supply a new formulation of the correction coefficient of the general jump equation that accounts for the bed roughness and its non homogeneity. New formulas, that satisfactorily agree with the experimental data, are proposed.
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