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Investigation of the 2013 Hadari Debris Flow in Korea Through Field Survey and Numerical Analysis

  • Choi, Junghae (Department of Earth Science Education, Kyungpook National University)
  • Received : 2018.07.05
  • Accepted : 2018.07.20
  • Published : 2018.09.30

Abstract

Landslides can be caused by localized intense rainfall. The loss of human lives and damage to property from landslides is increasing. However, little information exists on the movement and flow of sediment material at the time of rapid landslides. In this study, a field survey was conducted of landslides that occurred in 2013 in the Hadari area of Yeoju city in Korea. This was followed by numerical analysis. The purpose is to analyze the characteristics of a consequent debris flow and its movement at the time of failure. The results of the field survey and numerical analysis are consistent with each other. The maximum velocity of the debris flow was ~9.335 m/s and the maximum sediment thickness ~4.674 m. The latter is similar to the traces of debris flow observed in the field.

Keywords

References

  1. Chae, B.G., Choi, J.H., Jeong, H.K., 2016, A feasibility study of a rainfall triggering index model to warn landslides in Korea, The Journal of Engineering Geology, 26(2), 235-250 (in Korean with English abstract). https://doi.org/10.9720/kseg.2016.2.235
  2. Cho, S.E., 2017, Influence of estimation of hydraulic conductivity function on rainfall infiltration into unsaturated soil slope, Journal of the Korean Geotechnical Society, 33(9), 5-22 (in Korean with English abstract). https://doi.org/10.7843/kgs.2017.33.9.5
  3. Choi, J.H., 2017, Analysis of debris flow of Chun-cheon landslide area using numerical methods, The Journal of Engineering Geology, 27(1), 59-66 (in Korean with English abstract). https://doi.org/10.9720/kseg.2017.1.59
  4. Choi, J.R., 2018, An analysis of debris-flow propagation characteristics and assessment of building hazard mapping using FLO-2D, Crisisonomy, 14(2), 91-99 (in Korean with English abstract).
  5. Julien, P.Y., Lan, Y., 1991, Rheology of hyperconcentrations, Journal of Hydraulic Engineering, 117(3), 346-353. https://doi.org/10.1061/(ASCE)0733-9429(1991)117:3(346)
  6. Kim, J.W., Shin, H.S., 2016, Slope stability assessment on a landslide risk area in Ulsan during rainfall, Journal of the Korean Geotechnical Society, 32(6), 27-40. https://doi.org/10.7843/kgs.2016.32.6.27
  7. Korea Institute of Energy and Resources, 1989, Geological Report of the IP'O Sheet, 25pp (in Korean with English abstract).
  8. Liu, K.F., Hsu, Y.C., 2008, Study on the sensitivity of parameters relating to debris flow spread, In: Proceedings of the International Conference, Debris Flows: Disasters, Risk, Forecast, Protection, Pyatigorsk, Russia.
  9. Liu, K.F., Lee, F.C., 1997, Experimental analysis on impact mechanism of granular flow, Chinese Journal of Mechanics, 13(1), 87-100.
  10. Liu, K.F., Li, H.C., Hsu, Y.C., 2009, Debris flow hazard assessment with numerical simulation, Natural Hazards, 49, 137-161. https://doi.org/10.1007/s11069-008-9285-8
  11. Liu, K.F., Wei, S.C., Li, P.C., 2013, The influence of accumulated precipitation on debris flow hazard area, Journal of Chinese Soil and Water Conservation, 44(3), 225-233.
  12. Liu, K.F., Wu, Y.H., 2010, The assessment of debris flow hazard in Korea using Debris-2D, 2010-International Symposium in Pacific Rim, Taipei, Taiwan, 820-827.
  13. Liu, K.F., Wu, Y.H., 2013, Introduction to Debris-2D - A debris flow simulation program, TXT-tool 3.886-1.1. In: Sassa, K. (Ed.), ICL Landslide Teaching Tools (ISBN: 978-4-9903382-2-0), 238-246.
  14. Seo, Y.G., Choi, J.H., Chae, B.G., Song, Y. S., 2017, Characteristics of landslide occurrence and change in the matric suction and volumetric water content due to rainfall infiltration, The Journal of Engineering Geology, 27(4), 475-487. https://doi.org/10.9720/KSEG.2017.4.475