圖書典藏及影音數位平台

鹿寮溪水庫位於台南市白河區馬稠後與嘉義縣水上鄉牛稠埔溪交界處，民國100年4月核定之「臺灣南部區域水資源經理基本計畫」已將鹿寮溪水庫更新改善計畫列於中程水資源開發計畫。 本署南水局及本所於民國95年至103年間陸續辦理可行性規劃相關計畫，惟涉及拋石料調查、地質鑽探及地形測量等議題尚須補充調查規劃，經103年度計畫檢討，建議上述工作優先辦理。爰辦理本計畫，以利後續推動。

Water supply in the southern part of Taiwan is highly variable and depends primarily upon local climate conditions as water supply fluctuates significantly between seasons. With the added pressure of a gradually declining supply of water over the years, Taiwan Sugar Corporation has begun devising plans to provide a steady water source for the Chiayi Region. To enable this, the Water Resources Agency, Ministry of Economic Affairs, has begun conducting related studies and reviews since 2006. They include but not limited to the following: Feasibility Study, Revising Engineering Plans, Environmental and Ecological Survey, and Environmental Impact Assessments. However, information on riprap quality, soil conditions and topography was insufficient; it is therefore the objective of this project to conduct further investigations. Relevant findings are summarized as follows: I. Rocks sourced from Bai-Shui River and Shih Long River were found to be inadequate to meet rock riprap standards. The material should therefore be sourced externally. This means that rock quality standards could be satisfied, and the amount of disturbance to the environment as well as any potential public resistance could be mitigated. II. The recommended riprap source from Cingshuei River basin is also the main source of construction material for the recently constructed Hushan Reservoir. The material is in ample supply with good engineering properties. Its particle size is adequate and require very little transporting time. It is thus an ideal source for the current project. III. Geological investigation of dam structures and its appurtenance include 6 boreholes of a total length of 210m. New dam sites and appurtenance structures were re-drawn onto geological map according to borehole results and land surveys from the past. Dam sites primarily situate above the Liushang and Erchungchi Formations that consist of interbedded sandstone, siltstone, and mudstone. The rock mass is generally well compacted but cohesionless. The rock is relatively loose and uniaxial compression tests showed that the rock strength is between weak and extremely weak, and not durable. Given that joints are not prevalent and the rock is water-tight, therefore with relatively low strength bedrocks, cut-off structures should be installed to prevent failures from weak planes. Given that dam appurtenance structure - including permanent surface intake structure, spillway and construction channel- rely heavily on the integrity of the tunnel structures, therefore tunnel excavation should monitored for potential squeezing ground conditions, excavation collapse, crown collapse with care. IV. Geological map for the headrace tunnel was investigated through the use of 240m refraction seismic and two boreholes of a total of 120m. It was found that the tunnel is primarily founded on Kanchialiao formation consisting of sandstone and mudstone, as well as an interbedding of both types soil. The rocks are generally well-compacted, but cohensionless with the uniaxial compression test indicating strengths between weak and mildly weak and the rocks were not found durable. In light of the quality described above, squeezing ground, excavation collapse, crown collapse should be carefully monitored during tunnel excavation. V. Topographical survey for the current project covers the dam, the flood plain and the headrace tunnel, with an additional 28 hectares that consist of weirs and their appurtenance structures. The survey can assist in project planning and the allocation of the engineering structures. In addition, the introduction of 3D simulation also helps with planning and serves as a medium to communicate with the locals.

這份報告是「鹿寮溪水庫更新改善規劃 - 補充調查 2」，由經濟部水利署水利規劃試驗所主辦，黎明工程顧問股份有限公司執行。計畫目的為補充先前規劃中在土石料調查、地質鑽探及地形測量等方面的不足，以利後續工程規劃檢討與修正。 報告內容涵蓋了計畫緣起、目的、工作範圍，並深入分析了計畫區的現況、歷年規劃成果、氣象水文、地文地質、地理人文等基本資料。重點調查項目包括： * **土石料調查：** 評估築壩材料（心層料、內殼層料、濾層、排水層、卵石層）的料源、可採數量及品質。調查結果顯示，鄰近溪流（石?溪、白水溪）的骨材品質不符要求，建議優先考慮外購，並以清水溪流域為主要來源，估算運輸成本。 * **地質探查：** 進行引水隧道及堰址區域的地表地質調查、越域引水隧道洞口折射震測探查、大壩及附屬設施、引水隧道的地質鑽探與試驗。同時探討了庫區泥岩層作為心層料源的適用性。 * **地形測量：** 涵蓋大壩、淹沒區、引水隧道、堰址及附屬工程的地形測量，並進行 3D展示飛行模擬。 報告最後進行了工程地質的綜合評估，並提出了結論與建議。