Characteristics and Calculation of Wind Wave in Northern South China Sea

In the paper,the wind wave growth characteristics in Northern South China Sea(NSCS) were discussed.The relations among wind wave growth,wind speed,wind duration,and wind fetch have been analyzed and quantitatively retrieved.The applicability of five methods for wind wave calculation was also investigated to reach the conclusions as follow 1) the relation between wind speed and wind duration is linear.With higher wind speed,it cost more time for wind wave to grow from transition state to fully grown state.And the square relation between wind speed and fetch was found.With higher wind speed,comes longer wind fetch length.2) in NSCS,significant wave height is closely related to wind speed,wind duration and length of fetch.3) Three calculating methods(SMB,Wilson IV and Qingdao) on significant wave have presented stability and adaptability in the research of wind wave growth relations in NSCS.