| 1 |  | A Preliminary Study on Rainfall Infiltration Leading to Rock Slope Failure and Pore Pressure Variation through Physical Models Simulated using 3DEC |
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| 2 | | Rainfall Threshold and Signal Interpretation for Gravelly Debris Flows 54(1):16-26Hsien-Ter Chou[1*] Yi-Syu Ciou[1] Chia-Min Hsu[1] Chih-Hsuan Huang[1] Ching-Jen Lin[2] Ben-Huan Guo[2]* Corresponding Author. E-mail :  htchou@cc.ncu.edu.tw Show preview |  PDF( 28.26MB ) | | Rainfall Threshold and Signal Interpretation for Gravelly Debris Flows | 
Close | | Hsien-Ter Chou[1*] Yi-Syu Ciou[1] Chia-Min Hsu[1] Chih-Hsuan Huang[1] Ching-Jen Lin[2] Ben-Huan Guo[2] |
AbstractRainfall-induced gravelly debris flows can cause devastating disasters downstream. Both onsite monitoring and rainfall warning systems are effective countermeasures to mitigate damages. In this study, the onsite signals collected at the Houyenshan monitoring station from 2007 to 2019 were analyzed, and the relationship between the effective accumulated rainfall and the traveling distance of gravelly debris flows was established. Gravelly debris flows
occurred as pulse flows for 2–3 min, and the peak frequencies were recorded within a range of 15–45 Hz. Runoff and high concentration flow were recorded at a higher frequency of 50–70 Hz and lasted for longer than 5 min. The signals generated by background noises such as wind, rock falls, and earthquakes could be identified based on their amplitudes,frequency, and duration.
Key Words: Gravelly debris flows, onsite monitoring, rainfall threshold, geophone | 〔1〕Department of Civil Engineering, National Central University, Jhongli, Taiwan, R.O.C.
〔2〕Institute of Earth Sciences, Academia Sinica, R.O.C. * Corresponding Author. E-mail : htchou@cc.ncu.edu.tw | Received: 2022/05/19
Revised: 2022/07/14
Accepted: 2022/08/03
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| 3 | | Theoretical and Experimental Analyses of Flow Instability in High Gradient Channels |
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| 4 | | Morphological Evolution Mechanism of Gravel-bed Braided River through Numerical Simulation of Da-jia River |
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| 5 | | Evaluation of the Technical Feasibility of the Soil and Water Conservation Practices in Weregen Watershed, Tarmaber District, Ethiopia |
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| 6 | | Soil Depth Estimation and the Influence of Soil Depth and Vegetation Cover on Slope Stability in the Liukuei Experimental Forest |
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| 7 | | Vulnerability Assessment of Buildings and Residents for the Catastrophic Debris Flow in Nansalu Village during Typhoon Morakot |
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| 8 | | Spatiotemporal Characteristics of Landslide Evolution in the Tsengwen Reservoir Watershed from the Assessment of Landslide Activity Through Spatiotemporal Hotspot Analysis |
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