Comparisons of Wave Height and Period Distribution of Taiwan Waters

• Main Author: 李明璋
• Other Authors: 張憲國
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/08533699694505301644

碩士 === 國立交通大學 === 土木工程系所 === 95 === The wave data at Taipei harbor and An-ping harbor collected by research center of marine and harbor technology for year 2006 are used to investigate the characteristics of wave height distribution, period distribution and their joint distribution. The best distribution of wave height is examined to be Weibull distribution for both harbors comparing among four possible distributions based on four criteria, that are correlation coefficient, mean square error, percentage of zero and two peak histogram. The best fitting for the distribution of wave period is Erlang for both harbors following the procedure of fitting significant wave height. The joint distribution of wave height and period proposed by Cavani�� (1976) describes for the distribution of observed data much better than that of Longuet-Higgins (1983). When the best fitting distributions are observed, the corresponding statistical properties, such are mean wave height, significant wave height and maximum wave heights, are also investigated. The results show that the average of is higher than the observed one by about 15-20 % for both harbor. The maximum wave height is hardly expressed by the Weibull distribution. The distributions of monthly, seasonally and yearly significant wave heights and period for both harbors are studied and the best fitting distribution is Gamma function. The proposed results of monthly and yearly distributions of significant wave height and period are useful for engineering practice.