This paper presents the results obtained from an integrated modelling system in predicting typhoon-induced waves and surge in the East China Sea. The modelling system consists of the state-of-the-art climate model: MM5 and ocean current model: POLCOMS coupled with third generation wave model: ProWAM, and is used to study the interaction and transformation between the atmospheric conditions and sea states, including waves, tides and storm surge during the typhoon seasons in the East China Sea. The tropical cyclone bogussing scheme is also used within the MM5 model in order to initiate the generation and development of typhoon in the East China Sea. The POLCOMS and ProWAM models are two way-coupled to include full wave-current interaction, and are forced with surface winds and sea level pressure generated by MM5. Both MM5 and POLCOMS/ProWAM models use two-level nesting, with the computational domains centred at the area surrounding Taiwan. The modelling system is applied to Typhoon Kalmaegi, which occurred in July 2008. Detailed study of storm track, wind and pressure fields predicted by MM5, and typhoon-generated waves and surge along the Taiwan coasts predicted by POLCOMS/ProWAM, is carried out. The comparisons of model results with the observations and other published data show a reasonable agreement, although further comparisons with field measurements are required. The results also demonstrate that it is necessary to use nesting approach and high resolution grid for waves and surge to be predicted more accurately.
Coastal area has been known as an important place for human life and activities because of its unique conditions. However, many coastal zones are most vulnerable from attack by coastal waves and strong storm surge, which often cause serious disasters. In the UK, there have been a number of severe coastal floods due to the extreme storm conditions in recent decades.
