Typhoon-induced waves inflict severe damages and economic losses upon coastal regions on an annual basis.The refined simulation of the distribution characteristics of waves within ports and the wave attenuation effect of breakwaters holds substantial significance for the research on marine disaster prevention and mitigation.To precisely simulate the impact of typhoons on waves in ports and the wave attenuation function of breakwaters,the sea area of Dongpu Fishing Port in Shishi City,Fujian Province is designated as the research domain.With the super typhoon “Nepartak”(No.1601)as an illustrative case,the Holland model is used to calculate the typhoon wind field.Based on the unstructured triangular grid,the SWAN model and the ADCIRC model are integrated through the nesting approach of large and small areas to dissect the distribution traits of waves both inside and outside the fishing port during the typhoon episode.The results showed that the constructed computational model is favorably validated by the measured data.The average error between the empirical wind field model and the measured data is restricted within 8%,and the average error between the significant wave height and the measured wave height is confined within 15%.During the transit of the typhoon,conspicuous disparities in waves are observable inside and outside the fishing port.Owing to the shielding effect of the breakwater,the inner harbor basin of the fishing port possessed a certain wind sheltering capacity.The average wave height reduction ratio of the breakwater attained 90%,manifesting an evident attenuation effect of the breakwater on typhoon waves.