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http://dx.doi.org/10.21729/ksds.2019.12.2.15

Proposal of Early-Warning Criteria for Highway Debris Flow Using Rainfall Frequency (2): Criteria Adjustment and Verification  

Choi, Jaesoon (Department of Civil and Architectural Engineering, Seokyeong University)
Publication Information
Journal of Korean Society of Disaster and Security / v.12, no.2, 2019 , pp. 15-24 More about this Journal
Abstract
In the previous study, the rainfall data of 1 hour, 6 hours and 3 days were used as the rainfall criterion according to the grade to trigger the debris flow in the highway area, using the rainfall data of Gangwon area and the rainfall time-series data at the spot where the debris flow occurred. In this study, we propose an early warning criterion of the highway debris flow triggering through appropriate combination of three rainfall criteria selected through previous studies and adjustments of rainfall criterion in the highway debris flow triggering. In addition, simulations were conducted using the time-series rainfall data of 2010~2012, which had a large amount of precipitation for the five sites where debris flows occurred in 2013. As a result of the study, the criteria for the early warning of highway unsteadiness on the highway were prepared. In case of the grade-based adjustment, it is preferable to apply the unified rating to the grade B. Also, if the fatigue of the monitoring is not a problem, adjusting it to A or S may be a way to positively cope with the occurrence of highway debris flow.
Keywords
Early warning system for debris flow; Combination and adjustment of rainfall criteria; Simulation for debris flow;
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