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Vol.52, No.4, PP.185-252
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1
Small-Scale Flume Experiment to Investigate the Influence of Check Dam Opening on Upstream Deposition
52(4):185-195
Yuan-Hung Chiu Chi-Yao Hung*
* Corresponding Author. E-mail : cyhung@nchu.edu.tw
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2
Application of Directional Analysis Window in Geomorphometry
52(4):196-204
Chun-Yi Wu Shuan-Shuan Chang* Chen-Shuan Lee
* Corresponding Author. E-mail : g108042219@mail.nchu.edu.tw
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3
Influence of Landslides on Soil Erosion and Sediment Yield in a Watershed
52(4):205-217
Chun-Ting Chang[1] Ching-Nuo Chen[2] Chin-Yu Lee [1] Yi-Lung Yeh[3]
* Corresponding Author. E-mail : ginrochen@mail.npust.edu.tw
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Influence of Landslides on Soil Erosion and Sediment Yield in a Watershed
Close
Chun-Ting Chang[1] Ching-Nuo Chen[2] Chin-Yu Lee [1] Yi-Lung Yeh[3]

Abstract
Landslides are one of the main reasons for the soil erosion of a watershed and increases in sediment yield. To explore the effects of landslides on soil erosion and sediment yield, a physiographic soil erosion–deposition model was used in conjunction with a Geographic Information System to simulate soil erosion and sediment yield caused by the typhoon rainfall events and heavy rainfall. The results indicated that the soil erosion and sediment yield
of landslide areas were both significantly higher than those of areas without landslides by 1.1-7.7 and 1.3-9.1 times,
respectively. The trend of increasing soil erosion and sediment yield is consistent with change in the trend of the landslide ratio in the watershed. Although the distribution of soil erosion areas had a similar trend in areas influenced and not influenced by landslide, the depth of erosion in landslide areas was more severe. According to area statistics on erosion depth, compared with the area without landslide, the area of erosion depth of <0.5 cm is reduced; landslide ratio and erosion depth increase with an increase in accumulated rainfall. The total area of erosion did not increase, but the erosion depth increased. The results from the study will aid management units in the development of reference adaptation strategies.
Key Words: Landslide Ratio, Physiographic Soil Erosion–Deposition Model, Soil Erosion, Sediment Yield
〔1〕Department of Soil and Water Conservation, National Pingtung University of Science and Technology, Pingtung, Taiwan, R.O.C.
〔2〕Department of Tropical Agriculture and International Cooperation, National Pingtung University of Science and Technology, Pingtung, Taiwan,
R.O.C.
〔3〕Department of Civil Engineering, National Pingtung University of Science and Technology, Pingtung, Taiwan, R.O.C.

* Corresponding Author. E-mail : ginrochen@mail.npust.edu.tw
Received: 2020/10/30
Revised: 2021/02/02
Accepted: 2021/06/02
4
Modeling of Soil Quality for Assessing Soil Health: Improving Soil Functions Its Sustainability
52(4):218-230
Mohamed El Sayed Abou-Kota[1]* Abdellatif Deyab Abdellatif[2] Mahmoud Soliman Mohamed[2] Mona Hefni Mohamed Kenawy[1]
* Corresponding Author. E-mail : aboukota.m@gmail.com
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5
Case Studies for the Investigation of Large-scale Potential Landslides
52(4):231-240
Chia-Hao Lu[1] Jia-Tung Chen*[1] Ching-Hui Huang[1] Chao-Chin Pai[2] Zhong-Fu Xiao[2] Ming-Yan Li[2] Zhi-Wei Huang[2] Chia-Wei Wu[2] Fang-Tzu Kuo[3]
* Corresponding Author. E-mail : tom@safe100.com.tw
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6
Disaster Prevention Education for Soil and Water Conservation: A Case Study on Large-scale Landslide Disaster Prevention
52(4):241-252
Shih-Meng Hsu[1]* Yi-Fan Liao[1] Ming-Chia Tung[1] Yung-Sheng Lin[2] Yu-Hui Lin[2] Chun-Fa Chien[2]
* Corresponding Author. E-mail : shihmeng@mail.ntou.edu.tw
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