碩士 / 國立交通大學 / 土木工程系所 / 103 / This paper investigates the relationship between wave heights and wind speeds using quadratic polynomial regression analysis considering clusters of wind directions and kinds of wave properties. The data of wind and at the observation pole of the Taipei harbor for 2010 and 2012 wave were measured by the Harbor and Marine Technology center. The phenomenon of changing sea/land breezes during each day commonly occurs from May to September. The time of changing land breeze into sea breeze is about am 8:30 and am 8:50 and the time of changing sea breeze into land breeze is about pm 17:10 and pm 17:00, respectively, for 2010 and 2012.
Three kinds of clustering wind directions were examined. Separated azimuths of wind directions being 25o, 70o, 205o and 250o are suggested. Higher R2=0.66 and RMSE =0.40 m in model performance are evaluated depending on clusters of wind dirctions than those of R2= 0.63and RMSE= 0.41m by whole the data.
Based on the Pierson &; Moskowitz (1964) spectrum observed waves are separated into swells, growing waves and fully developed seas of which are divided into 12 groups of date by 4 clusters of wind directions. Calculated wave heights by the fitted quadratic equation on each group are combined to have a model performance of R2=0.76 and RMSE =0.33 m. The results show that regression analysis on data with consistent statistics has good model performance.
| Identifer | oai:union.ndltd.org:TW/103NCTU5015076 |
| Date | January 2015 |
| Creators | Chang, Kao-Wei, 張高瑋 |
| Contributors | Chang, Hsien-Kuo, 張憲國 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 90 |
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