Browse > Article
http://dx.doi.org/10.9720/kseg.2018.1.047

Calculation of Rainfall Triggering Index (RTI) to Predict the Occurrence of Debris Flow  

Nam, Dong-Ho (Department of Urban and Environmental Disaster Prevention Engineering, Kangwon National University)
Lee, Suk-Ho (Department of Urban and Environmental Disaster Prevention Engineering, Kangwon National University)
Kim, Man-Il (Forest Engineering Research Institute, National Forestry Cooperative Federation)
Kim, Byung-Sik (Department of Urban and Environmental Disaster Prevention Engineering, Kangwon National University)
Publication Information
The Journal of Engineering Geology / v.28, no.1, 2018 , pp. 47-59 More about this Journal
Abstract
At present, there has been a wide range of studies on debris flow in Korea, more specifically, on rainfall characteristics that trigger debris flow including rainfall intensity, rainfall duration, and preceding rainfall. the prediction of landslide / debris flow relies on the criteria for landslide watch and warning by the Korea Forest Service (KFS, 2012). Despite this, it has been found that most incidents of debris flow were caused by rainfall above the level of landslide watch, maximum hourly rainfall, extensive damage was caused even under the watch level. Under these circumstances, we calculated a rainfall triggering index (RTI) using the main factors that trigger debris flow-rainfall, rainfall intensity, and cumulative rainfall-to design a more sophisticated watch / warning criteria than those by the KFS. The RTI was classified into attention, caution, alert, and evacuation, and was assessed through the application of two debris flow incidents that occurred in Umyeon Mountain, Seoul, and Cheongju, Inje, causing serious damage and casualties. Moreover, we reviewed the feasibility of the RTI by comparing it with the KFS's landslide watch / warning criteria (KFS, 2012).
Keywords
landslide watch/warning criteria; rainfall intensity; preceding rainfall; debris flow watch/warning; rainfall triggering index (RTI);
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Gangwon Development Research Institute., 2008, Characteristics and protective measures against natural hazards in the mountain areas of gangwon province, 1-77.
2 Hwang, H. G., Lee, S. W., Kim, G. H., Choi, B. K., Yune, C. Y., 2013, Analysis of slope hazard-triggering rainfall and geological characteristics in 2011 and 2012, Korean society of hazard mitigation, 13(6), 179-189.   DOI
3 Jan, C.D., Lee, M.H., 2006, A rainfall-based debris flow warning analysis and its application, Doctor of philosophy in National Cheng Kung University(in chinese).
4 Jeong, J.W., 2015, Development on early warning criteria for debris-flow using realtime rainfall monitoring, MSc thesis, Seokyeong university.
5 Korea Forest Service., 2012, Landslide forecast criteria, Retrieved from http://sansatai.forest.go.kr.
6 Korea the Meteorological Administration., 2016, Korean peninsula climate changes forecast report, 1-3.
7 Nam, D.H., Lee, S.H., Jun, K.W., Kim, B.S., 2016, Study on the debris flow movement and the run-out calculation using the coupling of flood runoff model and debris flow model, Crisisonomy, 12(8), 131-143.
8 Sharpe, C.F.S., 1938, Landslide and Related Phenomena, Columbia University Press. New York, 3-137.
9 Stiny, J., 1910, Die Muren. Verlag der Wagner'schen Univeritats-Buchhandlung, Innsbruck. Debris flow(English translation by M. jakob and N. Skermer, 1977) EBA Engineering, 106.
10 Yu, B.I., 2015, Study on flash floods and debris flow guidance of gangwon-do, Department of urban & environmental disaster prevention school of fire & disaster prevention, Kangwon national university.
11 Yune, C.Y., Jun, K.J., Kim, K.S., Kim, G.H., Lee, S.W., 2010, Analysis of slope hazard-triggering rainfall characteristics in gangwon province by database construction, Korea geotechnical society, 26(10), 27-38.