“…In the last two decades, extensive experimental research has been developed to characterize the flow on conventional stepped spillways for chute slopes typical of either embankment or concrete dams downstream of the inception point of air entrainment, including the assessment of variables such as air concentration and velocity distribution [4,9,24,26,37,42,57,63,67,71] or the pressure field on the steps [2,4,41,74,85]. Empirical models have been developed for predicting the main air-water flow properties along the chute by Hager and Boes [45], Matos [57], Chanson [25], Boes and Hager [9,10], Meireles [65], Renna [71] and Ohtsu et al [67].…”