Abstract
This study proposes the new model for calculating the changes in a probability distribution of irregular wave height on sloping beaches. Experimentally measured properties of irregular wave height changes in all the processes such as shoaling, breaking and decay after breaking on different slopes are taken into account in the model. The technique of applying the wave height contour map on deep water wave height vs. water depth plain is newly introduced. Integration of modified Rayleigh distribution multiplied with the normal distribution, which introduces the effect of mean water depth change in the model, over the equal wave height area on the contour map gives a probability distribution of wave height on slopes very simply.
