based on optical wave profile inspection and the criteria defined in Table 1. The aim is to predict the wave types directly as a function of the governing parameters, such that the wave parameters addressed in Heller and Hager (2010) are not required. It concludes further the 2D impulse wave research initiated by Fritz (2002) and continued by Zweifel (2004), including the effects of grain diameter and hill slope angle and an extension of most dimensionless governing parameter ranges (Heller and Hager, 2010).