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Numerical wave simulation under hypothetical typhoon conditions has a pivotal role in the risk assessment of cross-sea bridges and tunnels. The wind-field generation and the adverse track selection have a large influence on the wave simulation results. This study verified the rationality of wave simulation under a single hypothetical typhoon wind field and analyzed the effects of different typhoon tracks on the waves in different directions of the project area. A numerical wind-wave model in the Pearl River Estuary was constructed according to intensities based on a 300-yr return period and tested via Monte Carlo simulation, which was applied to 104 typhoon tracks selected by the radius method. The results show that the adverse tracks that significantly impact the wave field at the West Artificial Island are within 100 km of the Pearl River Estuary. Seven adverse typhoon tracks reflecting different characteristics were obtained, which provided a basis for further study of the typhoon wave process in the Pearl River Estuary under extreme weather conditions. This study provides methodological support for the wave parameter analysis of large-scale engineering at coasts and estuaries that are susceptible to typhoons. [ABSTRACT FROM AUTHOR]

Recently, there are more and more large-scale water engineering construction projects in the Pearl River Estuary, such as waterway regulation, bridge engineering and port construction. The importance of safety of hydraulic structures and sensitivity to typhoon wave damage are one of the key factors of large-scale projects. In this paper, the influence of extreme weather conditions on the design wave parameters of artificial island at the junction of Hong Kong- Zhuliai- Macao Bridge is analyzed and calculated by using typhoon wave numerical model. Firstly, the landing typhoon data affecting the coastal areas of Guangdong Province from 1949 to 2014 are analyzed, and the parameters of Ivphoon pressure drop and maximum landing wind speed 300-year event in Pearl River Estuary are analyzed by stochastic model. Then, the numerical model of typhoon wave in Pearl River Estuary waters is established. Finally, the unfavorable landing tvphoon track is selected, and the wave parameters of east and west artificial islands in the Pearl River Estuarv under extreme weather conditions are calculated by using the combination of typhoon parameters 300-year event, and the original design wave elements are reviewed. It can provide new ideas and research methods for the design of other ocean engineering projects. [ABSTRACT FROM AUTHOR]