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Statistical Characteristics of Deepwater Waves along the Korean Coast  

Suh, Kyung-Duck (Department of Civil and Environmental Engineering, Seoul National University)
Kwon, Hyuk-Dong (Department of Civil and Environmental Engineering, Seoul National University)
Lee, Dong-Young (Coastal Engineering Research Department, Korea Ocean Research and Development Institute)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.20, no.4, 2008 , pp. 342-354 More about this Journal
Abstract
Some statistical characteristics of deepwater waves along the Korean coast have been investigated using various sources of wave measurement and hindcasting data. For very large waves comparable to design waves, it is recommended to use the average value of the empirical formulas proposed by Shore Protection Manual in 1977 and by Goda in 2003 for the relation between significant wave height and period. The standard deviation of significant wave periods non-dimensionalized with respect to the mean value for a certain significant wave height varies between 0.04 and 0.21 with a typical value of 0.1 depending upon different regions and different ranges of significant wave heights. The mean and standard deviation of the principal deepwater wave direction are presented at the 106 coastal grid points along the Korean coast. For relatively large waves, the probability density function of the directional spreading parameter $s_{max}$ is expressed as a lognormal distribution. The most suitable frequency spectrum in the Korean coast is the TMA spectrum. The probability density function of the peak enhancement factor $\gamma$ is also expressed as a lognormal distribution, with its mean value of 2.94, which is close to the value in the North Sea.
Keywords
wave height; wave period; wave direction; directional spreading parameter; wave spectrum;
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