NOAA의 장기 파랑 추산자료를 이용한 동해안의 고파랑 내습경향 분석

Analysis on occurrence trends of high waves of the East Sea using long-term wave hindcast data of NOAA

Incident wave conditions are very important in coastal engineering field such as construction and prevention of coastal disaster. In recent years, opinions increasing incident wave height at the East Sea have been stood out, furthermore, matters such as damage of harbor and coastal erosion are attributed to them. But, long term variability of incident wave condition has to sufficiently and carefully identify with long term data. In this context, this study tried to analyze long term variability of incident waves at the East Sea using long term hindcast wave data provided by NOAA. Annual averages, Root mean square error, and annual maximum of significant wave height are analyzed to figure out long term variability of wave height over 36 years. Also, occurrences of wave heights higher than 2 and 5 m are investigated to reveal trends of high wave appearance. As a result, both of increasing and decreasing trends are identified. The largest rate of increments of wave heights is around 0.24 cm/year, meaning total increment of wave height for 36 years is around 8.6 cm. On the other hand, The largest rate of decreases of wave heights is around 0.17 cm/year, meaning total decreases of wave height for 36 years is around 6.1 cm.