Pan, Y.; Li, L.; Amini, F.; Kuang, C.P., and Chen, Y.P., 2016. New understandings on the distribution of individual wave overtopping volumes over a levee under negative freeboard. In: Vila-Concejo, A.; Bruce, E.; Kennedy, D.M., and McCarroll, R.J. (eds.), Proceedings of the 14th International Coastal Symposium (Sydney, Australia). Journal of Coastal Research, Special Issue, No. 75, pp. 1207 - 1211. Coconut Creek (Florida), ISSN 0749-0208.

This paper presents some new understanding on the distribution of individual wave overtopping volumes under combined wave and surge overtopping conditions. Two-parameter Weibull distribution was utilized to present the distribution of the individual wave overtopping volumes. In different studies, the best-fit values of Weibull factors were fitted with different proportions of the sample values, e.g., all values, upper 50 % and upper 10 % of the values. In this paper, the performances of the Weibull factors fitted with different proportions of the data were assessed based on an analysis of the data of full-scale flume tests. Comparisons and discussions were made among the best fits with different proportions of the sample values. Mean and maximum values of the individual wave overtopping volumes calculated from the Weibull factors were compared to the measured ones. The results show that the maximum values are underestimated by the Weibull factors fitted with the upper parts of the data. It is suggested to use all proportion in Weibull curve fitting of individual wave overtopping volumes.