圖書典藏及影音數位平台

本項研究計畫為該氣候變遷整體研究計畫中之一環，目的係為整合水文環境變化、衝擊評估、脆弱度及風險評估等工作，並配合河道土砂運移及沖淤導致河相變遷模擬，進行因應氣候變遷所造成的極端氣候曾文溪防洪處理對策研究。本計畫擬建立流域整體防洪需求、土砂產生、處理對策等相關評估模式，整合土砂災害對坡地、河道、海岸的影響，以建立極端事件下曾文溪現階段防洪及土砂災害處理對策，並檢討現有的防洪及土砂災害預警系統，擬定在發生極端降雨事件時，流域水土災害疏散避難與救災對策。

Changes in climate trends impacting the scale and frequency of disasters continuously improve. Furthermore, a single natural extremely phenomena can produce multi-disasters in the same time. In 2009, deep-seat landslide, debris flow and floods so called compound disasters were triggered by more than 3,000 mm of accumulated rainfall at 120 hrs during Typhoon Morakot. The watershed where called Zeng-wen River also suffered catastrophic loss cause the typhoon Morakot. It results that challenge of compound disasters and extremely events caused by climate change become a new topic for watershed management. This is a project for Zeng-wen River watershed to adapt climate change and environmental change. This project planned adaptation strategies and action plans depending on hydrological scenarios due to climate change, evaluation of hydraulic structures (e.g. levees), vulnerability and risk analysis. First of above, the hydrological scenarios due to climate change are set according to project of “Climate Change Impacts and Adaptation on Water Environment” from WRA Secondly, based on those scenarios, the hydraulic structures are evaluated by numerical models. Thirdly, the vulnerability and risk analysis are performed on GIS. Last, adaption strategies and action plans are proposed for improving the capacity of adaptation of Zeng-wen River watershed.