3.2. Stokes-like waves
Fig. 3(a)–(c) shows a photo sequence of Stokes-like impulse waves generation involving rs¼608 kg/m3, a¼601, and small relative values of F¼1.36, S¼0.23, and M¼0.11 to satisfy Eq. (1). The water splash generated during impact in Fig. 3(a) is relatively small, entraining limited air that affects mainly the primary wave surface. The slide to wave energy conversion is energetically efficient since the slide with r sorw is totally damped by the surrounding water body and no energy is ‘lost’ during impact on the channel bottom (Heller, 2007). The maximum of the primary impulse wave reaches CWG1 in Fig. 3(c). Several similar pure water waves reach the wave propagation zone at relative distances X¼6.1–10.7 in Fig. 3(d)–(f). The primary wave is not necessarily the maximumwave for Stokes-like waves, in contrastto the other three wave types.