Application of dimensional analysis to the major factors responsible for beach-slope changes yields the dimensionless parameter, Hb/g0.5D0.5T, where Hb is the breaking wave height, T is the wave period, D is the sediment grain size, and g is the acceleration due to gravity. Relationships between this parameter and beach-face slope, tan α, are determined by using the existing laboratory and field data to yield tan α = [0.013/(Hb/g0.5D0.5T)2] + 0.15 for the laboratory and tan α = 0.12/(Hb/g0.5D0.5T)0.5 for the field. These equations make possible the prediction of the beach slope.

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