“…In the third section, a shoaling theory based on the energy flux corresponding to the KdV equation is put forward. In the forth section, shoaling curves for periodic waves are computed, and the results are compared to the linear theory, the results of (Svendsen and Brink-Kjaer, 1972), (Svendsen and Buhr Hansen, 1977), and finally to the higher-order computations of (Sakai and Battjes, 1980). Next, the shoaling of solitary waves is investigated.…”