RESONANT CHARACTERISTICS AT HUALIEN HARBOR, TAIWAN

Wave records at Hualien Harbor during the severest resonance period ( 12 hrs) Caused by Typhoon Tin, in 1994 were reanalyzed The ratios of resonant wave heights among three available wave stations for each of (lie Following three infragravity wave periods 100, 160 and 220 s were identified as a unique characteristic A linear. finite difference wave transformation model (RIDE) was used to simulate the observed resonant characteristics The Simulation. however. was successful only if a large ( 17 km x 45 km) grid is selected The distribution of wave phase suggested that there are two wave sources for causing the observed resonances (1) from offshore directly, and (2) from short-crest waves that are traveling along the south shoreline The along-shore short crest waves were caused by oblique incident waves and strong wave reflection on the beach The second source of incoming waves is available only if a large computation domain is selected