Experiment of Oblique Reflection of Solitary Wave

We conduct indoor experiments of the oblique reflection of solitary waves, paying special attention to the 2-dimensional features of the wave crests, examined by measuring 2-dimensional water surface displacements. The critical angle of incidence between regular and Mach reflection is found to be about 50 degrees. Our experiment also suggests that the difference between the angles of incidence and reflection depends on the incident wave height. The growth rate of the stem wave depends on both the amplitude and the angle of incidence.