圖書典藏及影音數位平台

為能明瞭石岡壩魚道及其上下游水域生態資源之變化，本計畫工作以每月採集所得的魚蝦類種類與數量，經由豐度、歧異度與均勻度及環境因子相關性等統計分析，除瞭解利用石岡壩魚道的生物種類、利用時機，與石岡壩對洄游生物的影響之外，並探討有何種生物利用魚道進行洄游，與生物利用魚道的季節，並提出石岡壩既有工程期間，對生物使用石岡壩魚道的狀況與周遭水域生態變動影響程度之評估，以供工程施作時應有的因應措施與對策。 因此，本計畫工作項目包括：(ㄧ)長庚橋至埤豐橋（含魚道本體）水域生態及洄游生物監測，進行統計分析，並建立石岡壩上下游和魚道之水域生物物種名錄。(二)蒐集分析長庚橋與埤豐橋間(含魚道本體)歷年水文水理(流量、流速)與水質狀況，並進行水質(含水溫、溶氧量、總溶解固體、pH值、導電度、氨氮等)、流量、流速之量測與監測。(三)以記錄魚隻由下游使用魚道上溯至上游的個體之水下攝影。(四)辦理研習與解說推廣活動，讓民眾了解石岡壩水域生物資源，進而愛護生態環境。(五)評估石岡壩既有工程中水域生態體系變化的有關生態保育措施。(六)工作報告及成果報告編撰印製等。

In order to understand the ecosystem of Shih-Kang Dam, this project was performed to do field investigation from Pifeng Bridge, which is 1 km downstream the dam, to Changgeng Bridge, which is 2 km upstream the dam. The estimation of the influence of habitat fragmentation to freshwater creatures due to the Shih-Kang Dam and groundsill works of Pifeng Bridge was also performed. The final purpose of the project is to bring out the improvement plan of Shih-Kang Dam fishway.Among all the 7 sampling spots, 29 species of fish, 5 species of crustacean, 22 families of aquatic insects and 2 species of plankton was recorded. The area around Shih-Kang Dam is rich in freshwater eco-resources. Not only catadromous fishes, Anguilla japonica and Anguilla marmorata, but also clean water indicator species Onychostoma barbatulum, and protected wild animals - Sinogastromyzon puliensis and Liobagrus formosanus has been found. It is believed that the ecosystem will be better after the function of fishway in Shih-Kang Dam is improved.