The performance of the copulas in estimating the joint probability of extreme waves and surges along east coasts of the mainland China

In designing coastal and nearshore structures, the joint probability of wave heights storm surges is essential in determining possible highest total water level. The key elements to accurately estimate are appropriate sampling extreme values selection functions for analysis. This study provide a full assessment performance different methods employed bivariate height surge samples analysed using 2 distributions 4 copulas, namely: Gumbel–Hougaard copula, Clayton Frank copula Galambos assessed. levels 100-year return period along coastline mainland China estimated by method with copula. results show that highly correlated areas dense typhoon paths. higher value southeast coast lower north. also indicate at locations where sea states energetic, approach can improve accuracy design.