Using Higher-Order Boussinesq Equations to Simulate Nonlinear Wave Transformation (I)

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Project title

Code/計畫編號

NSC92-2611-E006-026

Translated Name/計畫中文名

以高階Boussinesq方程式模擬非線性波浪之變形(I)

Project Coordinator/計畫主持人

Tai-Wen Hsu

Funding Organization/主管機關

National Science and Technology Center for Disaster Reduction

Department/Unit

Department of Hydraulic and Ocean Engineering,NCKU

Website

https://www.grb.gov.tw/search/planDetail?id=875804

Year

2003

Start date/計畫起

01-08-2003

Expected Completion/計畫迄

31-07-2004

Bugetid/研究經費

510千元

ResearchField/研究領域

土木水利工程

PACON 2004 會議在美國夏威夷歐胡島(Ohu’s Island) Honolulu Waikiki Beach Marriott Resort Hotel 舉辦。會議期間從五月三十日至六月四日共六天。今年為該會議成立二十週年(從 1984~2004)的重要會議，故具特別意義，有來自世界各國的學者、專家和工程師共同與會，將個人在海事科學和技術的研究成果、新發現或調查技術、水下技術和水中聲學乃至海洋養殖和資源的開發等交換心得和意見。從會議的討論和成果發表，促進學術交流，國際海洋科技和資源開發的合作。去年 PACON 2003 在國內高雄晶華酒店舉行，名稱定為海洋首都年(Ocean Capital Year)，因應地緣之便，國內從事海洋科學和技術的專家、學者和技術人員有很多人參加，也有水下技術和海底量測等新技術研發的現場展示，同時邀請呂副總統作專題演講，謝巿長長廷致歡迎詞，辦得有聲有色，也讓國內這個會議有進一步的認識。如前所述，PACON 這個國際會議在海事科學技術相當廣泛，使參加人員可以得到寬廣層面的知識範圍，例如深層海水的開發，有助於對未來台灣水資源問題的解決。This paper aims at the numerical simulation of scouring at the head of western breakwater at Mailiao Harbor, Taiwan, using wave, tidal current and coastal morphodynamic models. The western breakwater of Mailiao Harbor is located in a deep water of 25m. The mechanism of hydrodynamic and coastal morphology around the harbor is a combined effect by both waves and currents, and it is quite different from that in the nearshore zone. Thus, the existing hydrodynamic and coastal morphodynamic models are improved to simulate and analyze scouring at the head of the western breakwater. The numerical results including the currents and bathymetric changes closely match the field survey data. Furthermore, the computed concentration of sediment and sediment transport rate around the western breakwater during the monsoon season and typhoon events are analyzed. The results suggest that the scouring at the head of the western breakwater is occurred due to the sediment enhanced by wave-induced circulations and carried seaward by tidal currents.

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Using Higher-Order Boussinesq Equations to Simulate Nonlinear Wave Transformation (I)

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