2023 Volume 79 Issue 18 Article ID: 23-18165
While a shallow water wave hindcasting become popular, a quasi-deepwater wave is frequently adopted as a design offshore wave instead of an original deepwater wave or a pseudo-deepwater wave. For the quasi-deepwater wave, a design deepwater wave should be inversely estimated with an appropriate directional spreading parameter to calculate design waves on harbor facilities in the same time. So, in this study, the validity of the properties of deep and shallow water waves inversely estimated with the quasi-deepwater wave condition by repeated calculations of wave transformation is verified with the results of extreme value statistical analysis on pre-existing wave hindcasting data which has been used to estimate the quasi-deepwater waves.
As the results, the directional spreading parameter of design deepwater wave should be set carefully because it can affect not only the properties of design deepwater wave inversely estimated with the quasideepwater wave condition but also the properties of design wave of harbor facilities calculated with the design deepwater wave condition.
