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標題: 溪流匯口形成不同堵河程度之地形特徵
Topographic Characteristics by Level of River Blockage Formed by Confluences
作者: 張詩晨 
Shih-Chen Chang 
Yi-Jun Liu 
Ming-Hsien Tseng 
Hsiao-Yu Huang 
Su-Chin Chen 
關鍵字: 主支流交匯;堰塞湖;堵河程度;Tributary confluence;natural dam;level of river blockage
Project: 中華水土保持學報, Volume 51, Issue 1, Page(s) 13-20 

Satellite images were used to collect data on the confluences in Taiwan with considerable deposition for identifying river topography characteristics for different levels of river blockage. To define the levels of river blockage, 113 events from 2008 to 2015 were analyzed using a geographic information system to extract topographic factors, such as river width, slope, confluence angle, elevation, and watershed area. The results revealed that river width ratio and level of river blockage shared a significant, positive correlation, and river blockage occurs where the confluence angle approaches 90°. On the basis of these blockage characteristics, we forecast the potential debris flow torrent and potential areas for natural dams; these forecasts can be used to prevent debris flows into confluences during disasters.
Appears in Collections:第51卷 第01期

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