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of waves in front of a vertical wall are examined, using the new theoretical approach of a bi-parametric distribution, proposed by Ejinkonye  to investigate the effect of nonlinearity for the mechanics of the sea waves. The most probable value of the wave steepness is assumed to be = 0.055. From the subsequent calculation carried out, it was found that on deep water the parameter 2 tends to zero and 1 tends to , which is twice as much as the value of for the progressive waves on deep water. Moreover, for a fixed kd, this theory suggests that the non-linear effects increase while approaching
the bottom, which is valid for the mechanics of the sea waves.