EXPERIMENTAL RESULTS ON THE SEDIMENT GRAIN THRESHOLD UNDER STORM-WAVE ACTION

Abstract

Results on the conditions of initiation of first sediment movement on a flat bed under the action of monochromatic short waves are presented in this paper from a laboratory study. The results indicate the existence of a correlation between the Ursell number and the parameter a. The correlation is of the a=A, Un type. The values of n and X, as defined from the experiments, were not unique and were different from the values found in an earlier study by Sunamura. Therefore it was considered necessary to crosscheck the values of n using data from real-world beaches.