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Vol.46, No.3, PP.133-196
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1
Geomorphological Nature and Identification of Hillslope Debris Flow
46(3):133-141
Tien-Chien Chen* Zhen-Yu Wang Bo-Long Chen
* Corresponding Author. E-mail : tcchen@mail.npust.edu.tw
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2
Analysis of Accuracy for UAV-derived Topography from a GoPro Camera
46(3):142-149
Chieh-Cheng Pai [1] Yi-Cheng Liu[2]* Yu-Shen Hsiao[1] Hui-Pang Lien[3] Ping-Hsien Lin[3]*
* Corresponding Author. E-mail : kenji700808@gmail.com
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Analysis of Accuracy for UAV-derived Topography from a GoPro Camera
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Chieh-Cheng Pai [1] Yi-Cheng Liu[2]* Yu-Shen Hsiao[1] Hui-Pang Lien[3] Ping-Hsien Lin[3]*

Abstract
This study focused on photogrammetry by unmanned aerial vehicle (UAV) with a GOPRO HERO3 camera at Cishan river. The accuracy assessment was also analyzed. In the past, an UAV system was usually equipped with a high-resolution monocular camera to obtain highly accurate data. This study used a 4K dynamic photogrammetry for obtaining high-resolution land information utilizing a low-priced consumer camera (GOPRO HERO3). The images from the dynamic photogrammetry were obtained rapidly and without interruption, and could be transformed to orthophotos, stereographs, and DSMs by PIX4Dmapper. They can also be used to generate large mosaic pictures and 720-degree panoramic images by other software. The accuracies of the UAV-derived coordinate values in the X, Y and Z directions are 7.5, 4.2 and 12.4 cm, respectively. They all reach the criterions of horizontal accuracy (25 cm) and vertical accuracy (30 cm) of the National Land Surveying and Mapping center (NLSC). Thus,it is feasible to use this method in detecting disaster prevention problems.
Key Words : UAV, Consumer digital cameras, Pix4Dmapper.
〔1〕Department of Soil and Water Conservation, National Chung Hsing University, Taichung, Taiwan.
〔2〕Assistant Researcher. of Construction and Disasters Prevention Research Center, Feng Chia Universtiy, Taichung, Taiwan.
〔3〕Professor, Dept. of Water Resources Engineering and Conservation, Feng Chia Universtiy, Taichung, Taiwan.

* Corresponding Author. E-mail : kenji700808@gmail.com
Received: 2015/02/24
Revised: 2015/06/12
Accepted: 2015/06/23
3
Application of Terrestrial LiDAR on Mudstone Regolith Erosion
46(3):150-157
Ci-Jian Yang* Jiun-Chuan Lin Yuan-Chang Cheng
* Corresponding Author. E-mail : d03228001@ntu.edu.tw
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4
GIS-based Rapid Assessment for Classification of Utilizable Slopeland Limitation following a Disaster Event in the Chen-You-Lan Watershed
46(3):158-170
Ting-Yu Chang Siang-Min Wang Chao-Yuan Lin*
* Corresponding Author. E-mail : cylin@water.nchu.edu.tw
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5
Sediment Environment Assessment System for the Tseng-Wen and Baihe Reservoir Watersheds in Taiwan
46(3):171-180
Hsing-Chuan Ho[1] Bor-Shiun Lin[1] Chun-Yi Wu[2]* Su-Chin Chen[3] Yi-Da Chien[4] Ming-Fa Tsai [4]
* Corresponding Author. E-mail : cywu@alumni.nchu.edu.tw
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6
Experimental Analysis of the Flow Field Influenced by Plant Distribution on the Floodplain
46(3):181-188
Jin-Fu Li Shun-Chang Wang Su-Chin Chen*
* Corresponding Author. E-mail : scchen@nchu.edu.tw
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7
The Practical Application of the Steel Pipe-Wall Method to Control Debris Flow and Landslides - A Case Study of Houyenshan Landslides
46(3):189-196
Sheng-Fu Sheu[1][3]* Chih-Hung Shih[2]
* Corresponding Author. E-mail : sanford877@yahoo.com.tw
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