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Vol.53, No.1, PP.1-65
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1
Shigang Dam Removal and Water Storage Alternatives to Restore the Dajia River Morphological Natural Evolution
53(1):1-12
Su-Chin Chen[1] * Feng-Nan Chang[2] Yen-Yu Chiu[1] Hao-Yuan Cheng[1]
* Corresponding Author. E-mail : scchen@nchu.edu.tw
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2
Construction and Analysis of River Basin Districts, Longitudinal Segments, and Morphological Groups for Streams in Taiwan
53(1):13-24
Chia-Ning Yang[1] Cheng-Wei Kuo[1]* Mu-Ti Yu[2] Su-min Shen[2]
* Corresponding Author. E-mail : cwkuo@mail.sinotech.com.tw
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3
Detecting Landslides in Satellite Images Using Deep Learning Neural Networks
53(1):25-34
Ying-Jung Chen Shaou-Gang Miaou * Yu-Hsuan Hsu Ying-Cheng Lin
* Corresponding Author. E-mail : miaou@cycu.edu.tw
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Detecting Landslides in Satellite Images Using Deep Learning Neural Networks
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Ying-Jung Chen Shaou-Gang Miaou * Yu-Hsuan Hsu Ying-Cheng Lin

Abstract
This study proposes a system for quickly and accurately analyzing suspected landslides without terrain and surface height restrictions. Two satellite images are obtained in the same location but at different times, and the changes in their NDVI (Normalized Difference Vegetation Index) values are analyzed. When large changes occur,image processing methods are employed to detect image territorial variations, and the Faster R-CNN (Region-based Convolutional Neural Network), a deep learning network, is used to determine whether the territorial variation is a landslide. The performance of this system was evaluated using landslide data from the Big Geospatial Information System and the Soil and Water Conservation Bureau, Council of Agriculture; the resulting precision was 92.2 %. The system also outputs the outer contour of the landslide area to facilitate subsequent analysis and application.
Key Words: Landslide, Satellite Image, NDVI, Deep Learning Neural Network.
Department of Electronic Engineering, Chung Yuan Christian University, Taoyuan, Taiwan, R.O.C.
* Corresponding Author. E-mail : miaou@cycu.edu.tw
Received: 2021/01/25
Revised: 2021/03/31
Accepted: 2021/06/11
4
Monitoring Soil Erosion Changes on Slopes Through SBAS-InSAR Technology
53(1):35-42
Yu-Chi Hsieh [1] Yu-Shen Hsiao[1] * Yu-Hsuan Cho [1][2]
* Corresponding Author. E-mail : yshsiao@nchu.edu.tw
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5
Quantitative Differences in Water-Resource Conservation Capacity Associated With Land-Use Changes in the Zhuokou River Watershed
53(1):43-53
Jen-Yang Lin[1] Chun-Wei Tseng[2] Ci-Jian Yang[3] Chih-Wei Chuang[4]*
* Corresponding Author. E-mail : markchuang@mail.npust.edu.tw
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6
Substance Flow Analysis of Nitrogen in a High-Emission Urban Area: A Case Study of Taipei, Taiwan
53(1):54-65
Chong-En Li* Nae-Wan Kuo
* Corresponding Author. E-mail : chongen.li@outlook.com
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