The hydraulic flow features associated with a hydraulic jump over positive and negative steps are investigated. Attention is paid to the extreme positions of the phenomena, which allow the design of the stilling basin. In particular, the sequent depths ratio, the length characteristics and the wave formation are analysed by elementary means and confirmed by observations. A comparison of the two of energy dissipators clearly focuses the respective advantages.
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Hager et al. (1986) studied this question.
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