Application And Comparison Of Wave Models In The Vicinity Of China Sea Area

Wind-generated wave data is important for costal and ocean engineering, as well as the prediction of natural disaster and environmental research. Numerical simulation is one of the major methods in researching ocean wave and the current 3rd generation wave models have been well developed. WAVEWATCH-III and MIKE21-SW were applied to simulate waves in the sea area near China. In order to obtain better output and display of the simulation results, FORTRAN programs were compiled to read and transform the data files. The pre- and post-processors of the models were also used. The approach of spectral partition was implemented in this case. Firstly, Wave data observed by buoy and ship were used in model calibration. Secondly, differences between results of the two models were illustrated. At last, some of the results are analysed and discussed. Results showed that, when applied in large scale and deep water, both models had a good correlation between the calculated significant wave heights and the observed data. Meanwhile, WAVEWATCH-III could effectively improve the simulation accuracy through spectral partition and generally had a better result than MIKE21-SW. The latter had an arguable parameter in spectral partition, however, it had advantages of use convenience and practicality. In conclusion, both models have their own advantages, while the former was preferred by scientific researchers and the latter by engineers, respectively. In addition, the approach of spectral partition could give a better description of the total wave energy status. It is recommened to apply this method into simulation relate to wind-sea and swell.