花蓮海岸公路浪襲預警及防災應用技術之研究(1/2)- 浪襲預警系統建置

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109 年度

花蓮海岸公路浪襲預警及防災應用技術之研究

(1/2)-

浪襲預警系統建置

Wave Attack Early Warning and Disaster Prevention of Hualien Coastal Highway (1/2) –Establishing Wave Attack Early Warning

System

主管單位：交通部運輸研究所 陳冠宇¹ 蔡立宏2 李俊穎² 陳鈞彥²

Chen, Chun-Yen¹ Tsai, Li-Hung² Lee, Chung-Ying² Chen, Chun-Yen²

1國立中山大學海洋科學系

2交通部運輸研究所港灣技術研究中心

摘要

過去颱風的長浪曾在台11 線公路造成災情。例如 2015 年蘇迪勒颱風和

2018 年潭美颱風期間出現路基掏空，而 2016 年梅姬颱風期間則有浪襲道路的情況。故本研究收集近幾年的台11 線浪襲新聞事件，並利用 XBeach 模式從台 11

線挑選出8 個離海岸線較近的路段進行類颱風期間的海況模擬，藉以對台 11 線

受到的浪襲影響作初步評估。由於新聞事件和 XBeach 模擬皆顯示台 11 線人定

勝天段較容易受到浪襲影響，故利用COBRAS 模式針對該路段的 7 個道路斷面

進行不同海況條件的浪襲模擬，藉以建立情境資料庫並發展浪襲預警系統，以提供相關單位較全面的災害評估。

關鍵詞：花蓮海岸公路浪襲預警系統、異常浪、COBRAS、XBeach

Abstract

In the past, the typhoon abnormal waves have caused disasters in Number 11 Highway. For instance, the fundations of Number 11 Highway were exposed when the Sudil typhoon (2015) and Trami typhoon (2018) attacked, and there were wave attacks in Number 11 Highway during Megi typhoon (2016). As a result, in the study, in order to estimate the influence of wave attack, the wave attacking news were collected, and eight of which were simulated under typhoon-like situation by XBeach.

Due to the news and XBeach simulation have showed that the Jentingshengtien section in Number 11 Highway is likely influenced by wave attacks, we simulated seven cross sections of the Jentingshengtien section under different situations by COBRAS model. This method can build a situation database and develop the wave attack early warning system to estimate the hazard.

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109 年度

Keywords：Freak Wave Early Warning System for Hualian Coastal Highway, Freak Wave, COBRAS, XBeach.