Study on Molave typhoon wave in South China Sea based on SWAN model

CHEN Cheng; LI Yan

doi:10.3969/j.issn.1001-909X.2017.04.002

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Journal of Marine Sciences ›› 2017, Vol. 35 ›› Issue (4) : 14-19. DOI: 10.3969/j.issn.1001-909X.2017.04.002

Study on Molave typhoon wave in South China Sea based on SWAN model

CHEN Cheng, LI Yan

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Abstract

The construction of water transport project in China is frequently attacked by typhoon waves. To provide useful help for disaster prevention and mitigation of typhoon waves, the third generation wave model SWAN was established,which is suitable for South China Sea. Meanwhile, No. 0906 typhoon “Molave” was taken as an example to analyze the simulation results. Results show that the wind field and wave field are similar, i.e. the magnitude decreases from center to periphery, and the direction is counterclockwise rotation; the wind field is circular symmetric, while the wave field is elliptically symmetric due to the topography and coastline. The effective wave height contour also decreases from center to periphery, and the shape is influenced greatly by the topography and the coastline. Finally, the composition mechanism of typhoon wave was discussed. The results show that both storm wave and surge can form typhoon waves, and the submarine topography and coastline(e.g, island effect) also influence the characteristics of typhoon waves.

Key words

South China Sea / wave model / typhoon wave / wave field / effective wave height

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CHEN Cheng, LI Yan. Study on Molave typhoon wave in South China Sea based on SWAN model[J]. Journal of Marine Sciences. 2017, 35(4): 14-19 https://doi.org/10.3969/j.issn.1001-909X.2017.04.002

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