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Vol.50, No.4, PP.131-182
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1
Simple One-Dimensional Dam Breach and Flood Route Models for Tributary-Dammed Lake: A Case Study of the Laonong River in Southern Taiwan
50(4):131-142
Tzu-Yin Chen[1] Chi-Yao Hung[2]*
* Corresponding Author. E-mail : cyhung@nchu.edu.tw
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2
Constructing Approximated Three-Dimensional Fracture Surfaces of Deep- Seated Landslides by Using Volume Constraints and Smooth Minimal Surfaces
50(4):143-153
Chih-Yu Kuo [1] Ya-Hsin Chan [1] * Pi-Wen Tsai [2] Rou-Fei Chen [3] Yih-Chin Tai [4] Ching-Weei Lin [5]
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3
Formation and Dam Breach Analysis of the 2018 Hokkaido Iburi- Tobu Earthquake–Induced Landslide Dam in Atsuma Town, Japan
50(4):154-165
Chen-Yu Wu[1]* Chia-Hsing Lin[1][2] Chen-Yu Chen[1] Kuo-Wei Chen[1]
* Corresponding Author. E-mail : owen951753@mail.swcb.gov.tw
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Formation and Dam Breach Analysis of the 2018 Hokkaido Iburi- Tobu Earthquake–Induced Landslide Dam in Atsuma Town, Japan
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Chen-Yu Wu[1]* Chia-Hsing Lin[1][2] Chen-Yu Chen[1] Kuo-Wei Chen[1]

Abstract
Landslide dams, whether induced by earthquake or rainfall, may cause serious secondary disasters.
Therefore, assessing the disaster impact after a landslide dam breach is crucial for disaster response work. This study
used a free two-dimensional flood-routing model on HEC-RAS to establish a standard operating procedure for rapidly
assessing the impact of such a breach to protect downstream targets. The landslide dam caused by the Hokkaido
earthquake in Atsuma Town, Japan on September 6, 2018 was studied in this research. A numerical model was selected
to simulate the dam breach and analyze flood wave characteristics, including peak discharge, flooding arrival time, and
the inundation area. Landslide dam heights and breach durations were simulated to uncover disaster risks. From these
results, the emergency operation center can delimit the inundated area, protect targets, create emergency evacuation
plans, and set early-warning criteria.
Key Words: landslide dam breach, flood routing, impact area, Hokkaido Iburi-Tobu earthquake
〔1〕Research and Technology Development Team, Soil & Water Conservation Bureau, Council of Agriculture, Executive Yuan, Nantou 540,
Taiwan, R.O.C.
〔2〕Agricultural Policy Research Center Research Assistant, Agricultural Technology Research Institute, Hsinchu 300, Taiwan, R.O.C.
* Corresponding Author. E-mail : owen951753@mail.swcb.gov.tw
Received: 2019/11/21
Revised: 2020/01/02
Accepted: 2020/02/15
4
Multilevel Governance to Integrate Climate Change Adaptation and Disaster Risk Reduction Policies: a Large-Scale Landslide Area in Shi-Ding District, New Taipei City as an Example
50(4):166-177
Chin-Yu He[1]* Ching-Pin Tung[1] Chin-Lun Wang[2] Yong-Jun Lin[3]
* Corresponding Author. E-mail : jallyfish0628@gmail.com
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