圖書典藏及影音數位平台

為提供南部地區民眾充裕且穩定用水，經濟部水利署南區水資源局(以下簡稱南水局)奉行政院民國92年4月17日院台經字第0920017828號函辦理「曾文水庫越域引水工程」，該工程為於荖濃溪中游興建攔河堰，將荖濃溪水源越域引入曾文水庫。本工程完成後規劃之南化水庫及曾文水庫之水源運用之基本原則為在豐水期讓曾文水庫水源儘量蓄存在水庫中並充分利用甲仙堰越域引水之水源，枯水期則再改由曾文及烏山頭水庫系統供用以達曾文及南化水庫聯合運用的目的。其可增供南部地區60萬CMD水源，以因應民國105年後之中成長用水需求，其中30萬CMD供應高雄地區，另30萬CMD經由烏山頭水庫供應嘉南地區。為達供應高雄地區的用水目標，需建置曾文水庫下游輸水工程以聯接既有南化水庫／高屏溪攔河堰聯通管路。 民國98年莫拉克颱風重創曾文越域引水工程荖濃堰及東隧道，民國104年後仍須監測及評估，然南部區域供水系統易受原水高濁度影響，曾文水庫水力排砂期間東口堰無法取水，因目前曾文水庫僅能透過烏山嶺隧道由烏山頭水庫供水，若遭逢不可抗力因素影響將無法供水，影響南部區域供水穩定，爰此，建議曾文南化水庫聯通管輸水工程優先單獨推動，增加水庫間備援及調度能力。

Tsengwen/Nanhua Interconnecting Pipeline (originally the Tsengwen Reservoir Downstream Pipeline) was a portion of Tsengwen Reservoir Transbasin Diversion Project. The Morakot Typhoon resulted in a suspension of the Tsengwen Transbasin Diversion Project. Detailed design of the pipeline was completed in yr. 2010. The purpose of this study is to evaluation its impact to southern Taiwan water supply, if implementation of the pipeline is to proceed with a higher priority. Since detailed design of Tsengwen/Nanhua connecting pipe had been completed, the project could be operational in yr. 2021. At that time, if all water resources projects which have been planned are implemented on schedule, it is estimated that there will be a water shortage of 300,000 CMD. This connecting pipe will enable a conjunctive use of surface runoffs of Tsengwen and Kaoping River and will enhance capability of Potable water supply as well as standby function. If Phase #1 Kaoping Lake and northward transmission project of Kaoping Weir water will be completed, the increase in potable water supply due to this pipeline shall be 143,000 CMD. The raw water cost is 16.3 NTD/m3. The design capacity of the Tsengwen/Nanhua Interconnecting pipeline is 800,000 CMD. Simulation indicated that during normal operation the average daily maximum delivery would be 130,000 CMD. Therefore it is capable of delivering 600,000 CMD for emergency need. This capability may be used in events when outlet flows from Wushantou, Nanhua Reservoir and/or Kaoping Weir are interrupted and during long-term drought conditions. In addition, when turbidity of outlet flow Nanhua Reservoir is too high, water from Tsengwen Reservoir may supply Nanhua Purification Plant to maintain potable water supply.