英文篇名
Discussion on Issues of Tseng-Wen Reservoir Transbasin Water Diversion Project after Typhoon Morakot
作者
楊偉甫、葉純松、連上堯、侯秉承、黃崇仁、李民政、李怡德
關鍵字
曾文水庫、莫拉克颱風、引水隧道
摘要
台灣南部區域近年來因工商業漸趨繁榮,用水需求日益殷切,政府為解決南部區域中、長程供水問題,於92年核定「曾文水庫越域引水工程計畫」(以下簡稱曾文越引計畫)。曾文越引計畫相關工程於94年起陸續開工,預定101年4月完工。整體計畫執行至98年7月進度約31.07%。
引水工程中以東、西引水隧道為計畫要徑工程,為確保該工程如期完成,達成計畫目標,執行團隊於設計階段即對隧道工程之地質條件進行詳細調查,並據此進行工程設計。引水隧道已於93年完成招標並於94年1月1日正式動工。惟時至98年8月8日,莫拉克颱風降下超大豪雨,重創曾文越引計畫已施工構造物。考量荖濃溪主河道未來10年內將產生變動,近期內無合適地點可供佈設引水工程,故應先辦理山崩土石流及河道變遷調查監測,再檢討隧道復建之可行性。
英文摘要
In recent years, owing to the prosperous industrial and business activities in southern Taiwan, the water demand has been becoming increasingly acute. To meet the mid-term and long-term water demand in this region, the Water Resources Agency, Ministry of Economic Affair, with the approval of Executive Yuan, decided to carry out the Tseng-Wen reservoir transbasin water diversion project in 2003. This project commenced in 2005 and was originally expected to complete before April of 2012. The progress of overall project reached 31.07% as of July of 2009.
East and west water diversion tunnels are critical-path engineering of this project. To make sure this engineering could be fulfilled on schedule and to achieve the goal of this project, a thorough geological investigation was implemented in the design stage as a basis for designing. In 2004, the tender work of water diversion tunnels was completed and the excavation started from January 1, 2005. However, on the 8th of August in 2009, Typhoon Morakot brought an unexpected downpour and seriously damaged the completed structures of this project. Since the main channel of Laonong creek may shift in the coming decade, no appropriate locations could be chosen as the sites for water diversion engineering. Therefore, the survey and monitoring on landslide, debris flow and channel change should be executed in the first priority followed by reviewing the feasibility of resuming the construction of tunnels.