Panoramic Image Scanning Using the VLP-16 LiDAR Puck with an Automated Lifting Platform
Topographic Characteristics by Level of River Blockage Formed by Confluences
51(1):13-20Shih-Chen Chang  Yi-Jun Liu Ming-Hsien Tseng Hsiao-Yu Huang Su-Chin Chen *
* Corresponding Author. E-mail : firstname.lastname@example.org Show preview
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|Topographic Characteristics by Level of River Blockage Formed by Confluences|
|Shih-Chen Chang  Yi-Jun Liu Ming-Hsien Tseng Hsiao-Yu Huang Su-Chin Chen *|
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.
Key Words: Tributary confluence, natural dam, level of river blockage
〔1〕Department of Soil and Water Conservation, National Chung Hsing University, Taichng 402, Taiwan, R.O.C.
〔2〕Soil and Water Conservation Bureau, Council of Agriculture, Executive Yuan, Nantou, Taiwan, R.O.C.
* Corresponding Author. E-mail : email@example.com
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