| Title | Mathematical Hydraulic Models and Their Applications to Taiwan Harbors（2/4） |
| Dept | IOT |
| Year | 2003 |
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| Summary | Published in June 2003 IOT SERIAL No.92-85-764，156pp. This report comprises two sub-projects : （1）Characteristics of Typhoon Wave Groups （2）Wave Groups and Their Application to Coastal Freak Waves （1）Characteristics of Typhoon Wave Groups In this study, two methods for studying wave groups and their main parameters for describing wave groupiness were reviewed. Then they were analyzed and compared on the basis of field typhoon wave data at Hwa-Lien outer and inner harbor from aspect of group height parameter.The results showed that the groupiness parameters have no relationship with the wave height and the wave period. It means that the wave group phenomenon may be not well marked when the wave height or the wave period is bigger. However, there is a probability that the wave group might appear when the wave height or period is smaller. Furthermore, the interrelationship of groupiness parameters, which are better at outer harbor wave station than at inner harbors, except for GHR and GFH parameter. There is a linear correlation between GHR and GFH at both outer and inner harbor wave stations, which can be approximated by GHR=0.886GFH. （2）Wave Groups and Their Application to Coastal Freak Waves A survey of the literature suggests that the 2-D infragravity waves are too small for Hua-Lien Harbor resonance, while the 3-D infragravity waves trapped along the coastline, also known as edge waves, are more likely to exist. Based on previous measurements, the response of Hua-Lien Harbor is best-simulated using edge waves of 160 and 140-second periods. The features are both consistent with the field measurement. Therefore, it is very possible that edge waves are the cause for the resonance of Hua-Lien Harbor. |
| Post date | 2004/12/30 |
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