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標題: Sediment Trap Quantization Efficiency for Sabo Dams in the Torrents– The Case Studies in Southwest Taiwan
作者: I-Ta Tsai
Hui-Bang Lien
Zhong-Qiang Lee
Chun-Hung Wu
關鍵字: Sabo dams;sediment trap quantization efficiency;annual sediment trap volume;防砂工程;防砂功能量化;年計防砂量
Project: 中華水土保持, Volume 48, Issue 2, Page(s) 63-75.
This study estimates the sediment trap quantization efficiency in the Qietongliao watershed, the Dahudi watershed and the Nansaru watershed. The results of the study show that, the decrease in the landslide ratio after the establishment of sabo dams in the three watersheds is 33.2%/year in the Qietongliao watershed, 11.2%/year in the Dahudi watershed and 12.1%/year in the Nansaru watershed. The annual sediment trap volume is also estimated to be 1.6ൈ104 m3 in the Qietongliao watershed, 8.1ൈ104 m3 in the Dahudi watershed and 1.17ൈ104 m3 in the Nansaru watershed.

本研究以歷年崩塌分布比對、該集水區降雨逕流演算及以多期數值高程模型資料進行地形變遷分析, 以量化數據說明該防砂工程對於野溪河道所能提供的防砂功能,包含直接的野溪河道土砂運移減緩及間接的 河川底床及兩岸的植生復育效果,以茄苳寮溪集水區、大湖底溪集水區及南沙魯集水區等三個集水區為研究 對象,量化說明野溪防砂工程的防砂功能,根據本研究分析結果,各集水區在防砂工程施設後之河岸崩塌縮 減率分別為茄苳寮溪集水區之 33.3%/年、大湖底溪集水區之 11.2%/年及南沙魯集水區之 12.1%/年,年計防砂 量也分別為茄苳寮溪集水區之 1.6 萬 m3/年、大湖底溪集水區之 8.1 萬 m3 /年及南沙魯集水區之 1.17 萬 m3/年。
Appears in Collections:第48卷 第02期

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