圖書典藏及影音數位平台

卑南溪是連接臺東海岸、花東縱谷和中央山脈的重要溪流。卑 南 溪是臺東第一大溪，卑南之名是為了紀念卑南族的大頭目。全長約有 84.35公里，主流發源於中央山脈標高 3,293 公尺的卑南主山東側，主要支流為鹿野溪、鹿寮溪。卑南溪流經臺東縣的七個鄉鎮市，從源頭起依序是海端鄉、池上鄉、關山鎮、鹿野鄉、延平鄉、卑南鄉、臺東市，最後從臺東市北郊注入太平洋。卑南溪沿途包含眾多地景，為各式野生動物提供多樣式棲息地。然而，每年冬季十月至隔年三月的東北季風強勁，加上十一月至隔年五月為枯水季節，此時卑南溪河床因水量減少致生大面積裸露地，受到強勁的東北季風吹拂，造成河川揚塵的情況。位於卑南溪南側的臺東市首當其衝蒙受沙害，因此在過去，臺東市的風吹沙災情造就了「沙城」之稱。自 101 年起，第八河川分署在卑南溪河道施行梯田式水覆蓋工法，使揚塵問題得到有效改善。然而，水覆蓋工法可能對生態產生的影響尚未全面評估，因而透過本案於卑南溪選擇三處水覆蓋樣區，及兩處天然河段樣區進行兩次生態調查，欲了解卑南溪之生態現況，及提出水覆蓋工法之可行生態友善措施。

The Beinan River is an important waterway connecting the Taitung Coast, the Huadong Valley, and the Central Mountain Range. As the largest river in Taitung, its name commemorates the head chief of the Beinan Tribe. The river spans approximately 84.35 kilometers, originating on the eastern slope of Beinan Mountain in the Central Mountain Range at an elevation of 3,293 meters. Major tributaries include the Luye River and Luliao River. The Beinan River flows through seven townships and cities in Taitung County, starting from Haiduan Township, followed by Chishang Township, Guanshan Township, Luye Township, Yanping Township, Beinan Township, and finally Taitung City, where it passes under the Zhonghua Bridge and empties into the Pacific Ocean.The river features a variety of landscapes along its course, providing diverse habitats for various wildlife. However, during the winter months (October to March), strong northeast monsoon winds prevail, and the dry season from November to May exposes large areas of the riverbed. These conditions lead to severe river dust events, particularly affecting Taitung City, which historically earned the nickname “Sand City” due to frequent dust disasters. Since 2012, the Eighth River Management Office has implemented a tiered water coverage technique in the Beinan River to effectively mitigate the dust problem. However, the potential ecological impacts of this method have not been fully evaluated. This study investigates the ecological status of the Beinan River by selecting three water coverage sites and two natural river sites for two rounds of ecological surveys. The aim is to assess the current ecological conditions of the Beinan River and propose feasible eco-friendly measures for the water coverage method.