A Study on Coastal Flooding and Risk Assessment under Climate Change in the Mid-Western Coast of Taiwan

被引:33
作者
Hsu, Tai-Wen [1 ]
Shih, Dong-Sin [2 ]
Li, Chi-Yu [3 ]
Lan, Yuan-Jyh [4 ]
Lin, Yu-Chen [5 ]
机构
[1] Natl Taiwan Ocean Univ, Dept River & Harbor Engn, Keelung 20224, Taiwan
[2] Natl Chung Hsing Univ, Dept Civil Engn, Taichung 40227, Taiwan
[3] Natl Taiwan Ocean Univ, Inst Marine Environm & Ecol, Keelung 20224, Taiwan
[4] Natl Taiwan Ocean Univ, Ctr Excellences Oceans, Keelung 20224, Taiwan
[5] Natl Penghu Univ Sci & Technol, Dept Tourism & Leisure, Magong 880, Penghu, Taiwan
关键词
climate change; coastal disasters; vulnerability; disaster risk; SEA-LEVEL RISE; APALACHICOLA RIVER; WATER-RESOURCES; CHANGE IMPACTS; MODEL; WIND; VULNERABILITY; SCENARIOS; HYDROLOGY; EXTREMES;
D O I
10.3390/w9060390
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This study integrated coastal watershed models and combined them with a risk assessment method to develop a methodology to investigate the impact resulting from coastal disasters under climate change. The mid-western coast of Taiwan suffering from land subsidence was selected as the demonstrative area for the vulnerability analysis based on the prediction of sea level rise (SLR), wave run-up, overtopping, and coastal flooding under the scenarios of the years from 2020 to 2039. Databases from tidal gauges and satellite images were used to analyze SLR using Ensemble Empirical Mode Decomposition (EEMD). Extreme wave condition and storm surge were estimated by numerical simulation using the Wind Wave Model (WWM) and the Princeton Ocean Model (POM). Coastal inundation was then simulated via the WASH123D watershed model. The risk map of study areas based on the analyses of vulnerability and disaster were established using the Analytic Hierarchy Process (AHP) technique. Predictions of sea level rise, the maximum wave condition, and storm surge under the scenarios of 2020 to 2039 are presented. The results indicate that the sea level at the mid-western coast of Taiwan will rise by an average of 5.8 cm, equivalent to a rising velocity of 2.8 mm/year. The analysis indicates that the Wuqi, Lukang, Mailiao, and Taixi townships are susceptive, low resistant and low resilient and reach the high-risk level. This assessment provides important information for creating an adaption policy for the mid-western coast of Taiwan.
引用
收藏
页数:13
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