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題 名 | 莫拉克颱風臺東地區流域複合型地工災害探討=Case Study of Compound Geohazard within the Watershed of Taitung Area during Typhoon Morakot |
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作 者 | 鄭錦桐; 邵國士; 冀樹勇; 邱俊翔; | 書刊名 | 地工技術 |
卷 期 | 122 2009.12[民98.12] |
頁 次 | 頁51-60 |
分類號 | 548.314 |
關鍵詞 | 莫拉克颱風; 臺東; 複合型地工災害; Typhoon Morakot; Taitung; Compound geohazard; |
語 文 | 中文(Chinese) |
中文摘要 | 莫拉克颱風侵台期間引進西南氣流,於台東地區降下累積達1500mm以上之雨量,其雨量已超過200年重現期距,並且誘發台東地區多處地工災害。本文主要為台東縣知本溪、金崙溪、太麻里溪、與大鳥溪等中、下游之道路基礎與鄰河岸聚落之地工災害勘查成果,歸納各類地工災害肇因於極端豪雨誘發崩塌、堰塞湖、土石流、河道淤積與潰堤洪水氾濫,且各災害間具連鎖性、累積性與複雜性,屬複合型災害之特性,後續應加強廣域空間監測與長時間之災害潛勢量化分析工作,以利擬定未來工程整治之因應對策。 |
英文摘要 | The accumulated rainfall of typhoon Morakot is greater than 1500mm and the rainfall intensity is over 200yrs return period in Taitung county located in the southeast of Taiwan. Hence, the extreme rainfall triggered widespread and large magnitude geohazards in the south part of Taitung county. The serious geohazards along Jhihben river, Jinlun river, Taimali river, Darzu river and Darniau river are presented in this article. Field survey was conducted and the result shows that the type of geohazards include landslide, debris flow, river bed silt, nature dam, and flooding. All of them were triggered by extremely heavy rainfall and the characterization of those geohazards are accumulative, complex, and chain reactive. Therefore, those geohazards have relation between each other, so they could be represented as compound geohazards. In order to make strategies for rehabilitation, monitoring and quantitative analysis of hazard potential are indeed needed in the near future. |
本系統中英文摘要資訊取自各篇刊載內容。