Stive (1985) performed flume experiments of periodic and random waves breaking on a gently sloping beach. Measurements were conducted in both a small-scale wave flume and a large-scale wave flume, such that a scale comparison could be performed. To that end, the small-scale measurements were scaled up geometrically by the length- scale relation $$n_{\text{length}}$$ and dynamically by the velocity scale relation according to Froude $$n_{\text{velocity}} = n_{\text{length}}^{0.5}$$.