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Vol.44, No.2, PP.97-190
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1
The Effects of the Cover Ratio of Erosion Control Geosynthetic Mesh on Soil Losses along Hillslopes
44(2):158-164
Shih-Hao Jien* Ming-Hsi Lee Wei-Hsin Chien Tzu-Yang Tai Chung-Chi Wang Chun-Ting Chen
* Corresponding Author. E-mail : shjien@mail.npust.edu.tw
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2
The Factors of Evacuation Decisions for Local Governments and Inhabitants in Debris-Flow Potential Areas
44(2):165-178
Chen-Yu Chen*
* Corresponding Author. E-mail : cychen59@gmail.com
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3
Characteristic Analysis of Rainfall-induced Landslide Potential in Western Taiwan
44(2):179-189
Chien-Hsin Chen[1]* Yi-Hsun Chen[1] Chih-Hao Tan[1] Shu-Yeong Chi [1] Tai-Wei Su[2]
* Corresponding Author. E-mail : chchen@sinotech.org.tw
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4
Numerical Analysis of Slope Stability at the 115.9k Point of the Su-Hua Highway
44(2):97-104
Huang-Kuei Chu[1] Chia-Ming Lo[2]* Yu-Lin Chang[3]
* Corresponding Author. E-mail : cmlo@ctu.edu.tw
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Numerical Analysis of Slope Stability at the 115.9k Point of the Su-Hua Highway
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Huang-Kuei Chu[1] Chia-Ming Lo[2]* Yu-Lin Chang[3]

Abstract
The Su-Ao to Nan-Ao section of the Su-Hua highway was seriously damaged by rain-fall caused debris sliding during the 2010 typhoon Maggie. Rain-fall induced debris slide damage was most significant at kilometer 115.9, which is the area of maximum curvature of the highway.Slope instability and landslide hazard potential are key issues for disaster prevention along mountain roads. In this study, the finite element software (Midas/GTS) has been used to establish a
three-dimensional slope stability model of the slope at kilometer 115.9 of the Su-Hua highway using model parameters based on field investigation and reasonable assumptions. Field survey and numerical simulation results reveal landslide failure mechanisms, the area of the potentially unstable slope,and sliding depth, which otherwise are difficult to obtain. The study shows that the area and volume of the landslide body is approximately 1.56 × 10-1 km2 and 3.56 × 10-3 km3, and that the deepest sliding depth is 22.2 m. These results can provide a reference for disaster prevention geologic hazard mapping, and associated remediation project planning.
Key Words : Slope instability, landslide hazard, field investigation, numerical simulation.
〔1〕 Liming engineering consultants, INC., Taichung, Taiwan
〔2〕 Department of Civil Engineering, Chienkuo Technology University, Changhua, Taiwan.
〔3〕 Disaster Prevention Technology Research Center, Sinotech Engineering Consultants, INC., Taipei, Taiwan.
* Corresponding Author. E-mail : cmlo@ctu.edu.tw
Received: 2012/09/25
Revised: 2012/11/13
Accepted: 2013/03/04
5
3-D Mechanical Conversion Model for the Soil-Root System of the Predominant Plant in the Shi-Men Watershed
44(2):105-120
Der-Guay Lin Bei-Jian Chiou Sheng-Hsien Wang* Shin-Hwei Lin
* Corresponding Author. E-mail : twarvin@ems.chiayi.gov.tw
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6
Analysis of Environmental Factors and Landslide Susceptibility Prediction for the Watershed Landslides
44(2):121-130
Mu Jing[1] Chao-Yuan Lin[2]*
* Corresponding Author. E-mail : cylin@water.nchu.edu.tw
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7
Soil Water Index Applied as a Debris Flow Warning- Reference Based on a Tank Model
44(2):131-143
Su-Chin Chen[1] Chiao-Wen Tsai [1]* Chen-Yu Chen[2] Mei-Chen Chen[2]
* Corresponding Author. E-mail : d099042001@mail.nchu.edu.tw
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8
The Monitoring and Flow Dynamics of Gravelly Debris Flows
44(2):144-157
Hsien-Ter Chou[1] Ching-Fang Lee[2]* Chih-Hsuan Huang[3] Yu-Long Chang[1]
* Corresponding Author. E-mail : cflee@sinotech.org.tw
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