臺灣博碩士論文加值系統

對於地狹人稠的台灣而言，海岸地區為國土資源中重要的一環，若海岸持續遭受侵蝕，不僅造成國土流失，鞏固岸線之海岸防護設施，其受到海洋營力衝擊的能量與機率也隨之增加，將可能掏空防護設施基礎，造成結構物不穩定，加上颱風侵襲則有潰堤而產生暴潮溢淹之虞。為達國土保護與避免複合性災害發生，本研究提出複合性災害風險評估，並以雲林以及台東，兩個不同層級的防護區進行分析，最終繪製風險地圖。
首先本研究以岸線變遷分析以及量體分析界定研究區之侵蝕岸段，並列出侵蝕岸段所涵蓋之防護設施以及其後方對應村里。接著以數值高層模型(Digital Elevation Model, DEM)與重現期50年潮位推估值進行暴潮溢淹情境分析，其中考量到海岸變遷易受海洋環境改變而產生非定值的變動，因此僅以五年內，因海岸侵蝕造成消波緩衝帶完全流失之後方對應村里，進行暴潮溢淹潛勢分析。
以上界定之侵蝕岸段以及暴潮溢淹情境分析結果，皆將帶入風險評估進行討論。在本風險評估中，為透過聯合國減災組織所提出的風險評估原則，由危害度以及脆弱度所組成。其中，危害度為代表自然或人為的災害；脆弱度則代表社會人文、經濟以及災害應變能力，以上因子權重皆由專家學者問卷調查所得。最後將危害度指數以及脆弱度指數帶入風險矩陣計算該村里侵蝕風險等級，並透過地理資訊系統(GIS)繪製海岸侵蝕風險地圖。雲林海岸侵蝕風險評估為五港村、崙北村以及港西村；台東海岸則為富岡里、建國里等7個村里之侵蝕風險相對較高。

Taiwan, an island locating in the western Pacific Ocean, puts lots of effort into saving coastal land resources. If coastal erosion continues to occur, not only does the land loss but also cause damage to existing coastal protection structures. Without the existence of buffer zone, the wave will impact on protection structures directly. In the meanwhile, if an invasion of typhoon happened, the dike may be broken down and follow with inundation by the storm surge. In order to protect national land resources and decrease the damage from disasters, this study purposed the compound risk classification and the risk map for Yunlin and Taitung coastal area that are under different erosion potential for the risk assessment.
First of all, shoreline change analysis and the volumetric analysis were used to define erosion sectors, and then connected the erosion sectors to administrative units. Therefore, three villages in Yunlin, seven villages in Taitung are subject to coastal erosion. Afterward, this study calculated storm surge by Digital Elevation Model and 50-year return period tidal level to show the villages that may encounter storm surge due to coastal erosion in nearly five years.
Eventually, these analysis results would be the elements of risk assessment. The risk assessment which is based on factors of hazard and vulnerability, hazard represents as natural or man-made disasters, vulnerability is the phase about humanity, economy and resilience, the weight between them was collected by questionnaire. Ultimately, hazard index and vulnerability index were brought into risk matrix to calculate the risk level, then drew the risk map by Geographic Information System (GIS). The risk maps shows Wugang Village, Lunbei Village and Gangxi Village in Yunlin, Fugang Village, Jianguo Village, etc, seven villages in Taitung are exposed to relatively high potential risk.

謝誌 I
中文摘要 II
Abstrsct III
圖目錄 VI
表目錄 VIII
第一章 緒論 1
1.1 研究動機與目的 2
第二章 文獻回顧 4
2.1 海岸相關法規 4
2.2 海岸侵蝕 6
2.3 海岸風險評估 8
2.3.1 風險評估通則 8
2.3.2 海岸地區風險案例介紹與分析流程 10
2.4 小結 13
第三章 研究方法與分析 14
3.1 研究區基本資料收集與分析 14
3.1.1 雲林 14
3.1.2 台東 19
3.2 界定侵蝕岸段 22
3.2.1 岸線變遷分析 22
3.2.2 量體分析 22
3.3 暴潮溢淹情境分析 22
3.4 海岸災害風險評估 23
第四章 研究結果 26
4.1 岸線變遷分析 26
4.1.1 雲林 26
4.1.2 台東 30
4.2 量體分析 36
4.2.1 雲林 36
4.3 暴潮溢淹情境分析 37
4.3.1 雲林 38
4.3.2 台東 40
4.4 海岸災害風險評估 44
4.4.1 專家學者問卷調查成果與分析 44
4.4.2 雲林海岸侵蝕風險評估 52
4.4.3 台東海岸侵蝕風險評估 61
第五章 結論與討論 70
5.1 結論 70
5.1.1 雲林 70
5.1.2 台東 70
5.2 討論 70
第六章 參考文獻 75
附錄一 77
附錄二 80

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