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http://dx.doi.org/10.21729/ksds.2019.12.2.1

Proposal of Early-Warning Criteria for Highway Debris Flow Using Rainfall Frequency (1): Proposal of Rainfall Criteria  

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. 1-13 More about this Journal
Abstract
In this study, we propose rainfall frequency criteria for the development of early-warning system based on the evaluation of the highway debris flow that includes the contents of the rainfall recurrence cycle. The rainfall criterion was recommended based on the results of previous researches and the recommended rainfall criterion was 1 hour, 6 hours, and 3 days. At this time, the study subjects were located in Gangwon area and the probability rainfall of 8 stations in Gangwon area was collected. Also, the probabilistic distribution of the 1 hour, 6 hour, and 3 day rainfall criteria to be used for the early warning for the highway debris flow in Kangwon area was estimated through the probability analysis. In addition, we analyzed the correlation between 3 types of rainfall criteria selected from the rainfall data and the actual destructive damages of debris flow at 12 points in 7 lines of Gangwon highways. At this time, the rainfall criterion on the probability distribution was divided into an average value and a lower limit value. As a result of the review, it was found that the case of using the lower limit value of the rainfall according to the recurrence intervalwell simulates the situation of actual debris flow hazards.
Keywords
Highway debris flow early-warning; Rainfall criteria; Rainfall frequency; Average recurrence interval;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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