Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
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Analysis of Characteristics of some of Forest Environmental Factors on Debris Flow Occurrence - With a Pusan and Ulsan Metropolitan Areas -

토석류 유출에 기인하는 몇 가지 산림환경인자 분석 - 부산 및 울산광역시를 중심으로 -

  • Lee, Hae-dong (Department of Forest Resources, Gyeongnam National University of Science and Technology) ;
  • Park, Jae-hyeon (Department of Forest Resources, Gyeongnam National University of Science and Technology)
  • 이해동 (경남과학기술대학교 산림자원학과) ;
  • 박재현 (경남과학기술대학교 산림자원학과)
  • Received : 2015.01.20
  • Accepted : 2015.04.29
  • Published : 2015.06.30
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Abstract

This study was carried out to determine the distribution of factors as effected by debris flow in Ulsan and Pusan metropolitan areas because mainly debris flow caused by typhoons and local heavy rainfall events is mainly attributed to damage of human being ad property. The high risk degree of debris flow was to affected by east (20%), northeast (20%) and northwest (20%) slopes with stand age class with elevation (69%) of 100-200 (33%). Also, the risk was high in high erosion collapse degree with slope degree of $20-25^{\circ}$ with over 300 mm (100%) of maximum daily rainfall events and 50-100 mm (50%) or >100 mm (50%) of maximum hourly rainfall events with <5 km of stream path and <50 ha of catchment area. Landslide debris and wood residue flow was also related to igneous rocks (73%) and bank collapse types of debrs flow (57%).

본 연구는 부산 및 울산광역시의 토석류 유출 위험지역 총 15개소에서 토석류 유출에 영향을 미치는 산림 환경인자에 대한 인자별 발생분포비율을 분석하였다. 토심은 중(30~99 cm), 방위는 동사면과 북동사면 및 북서사면, 표고는 100~200 m, 산지평균경사는 $20^{\circ}$ 미만, 모암은 화성암, 과거 토석류 유출이 있었던 지역, 최대시우량은 50~100 mm, 1일 최대강우량은 300 m 이상, 수계밀도는 $3{\sim}4km/km^2$, 산사태 발생 가능성이 있는 경사 $20^{\circ}$ 이상의 분포비율은 20~40%와 40~60%, 산사태 위험도 2등급 이상 비율은 40~60%, 유목이 있는 상태, 사방공작물 시설이 없는 지역, 4영급, 임분이 밀한 지역, 혼효림 등의 인자가 토석류 발생에 기여하는 것으로 분석되었다.

Keywords

References

  1. Choi, J.W., Lee, S.L., Min, K.D., and Woo, I. 2004. Landslide Susceptibility Mapping and Verification Using the GIS and Bayesian Probability Model in Boun. Economic and Environmental Geology 37(2): 207-223.
  2. Choi, Y.J. 2010. A Study on Downstream Process of Debris Flow Mobilized from Landslides. Department of Civil Engineering Graduate School, Kang won National University dissertation. pp. 932.
  3. Jang, C.B. 2014. A Study on Behavior Characteristic sand Scal eof Debris Flow in Korea. Department of Civil Engineering Graduate School, Kang Won National University Dissertation. pp. 101.
  4. Jang, E.S., Yun, H.S., Lee, M.R., Cho, J.M., and Kim, Y.H. 2009. Risk Analysis of Debris Flow on GIS Technology. 2009 KSCE Conference, 1743-1747.
  5. Jeong, S.W. 2014. Rheological Characteristics and Debris Flow Simulation of Waste Materials. Journal of the Korean Society of Civil Engineers 34(4): 1227-1240. https://doi.org/10.12652/Ksce.2014.34.4.1227
  6. Jung, G.W., Pack, S.J., and Lee, C.W. 2008. Development of the Score Table for Prediction of Landslide Hazard -A Case Study of Gyeongsangbuk-do Province-. Journal of Korean Forestry Society 97(3): 332-339.
  7. Kim, K.S., Kim, Y.W., Chae, B.G., Cho, Y.C., Lee, C.O., and Song, Y.S. 2006. Geometry of Debris Flow Occurrence on Natural Slopes. KSEG Conference 2006: 51-59.
  8. Kim, P.K. 2012. Numerical Modeling for the Detection and Movement of Debris Flow Using Detailed Soil Maps and GIS. Department of Civil Engineering Graduate School, Kyungpook National University. pp. 204.
  9. Kim, W.Y., Kim, K.S., Lee, S.R., and Chae, B.G. 1998. Landslide Types and Susceptibilities Related to Geomorphic Characteristics-Yeonchon-Chulwon Area-. The Journal of Engineering Geology 8(2): 115-130.
  10. Ko, S.M., Lee, S.W., Yune, C.Y., and Kim, G.H. 2013. GISbased Analysis of Debris-flow Characteristics in Gangwondo. Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography 31(1): 57-67. https://doi.org/10.7848/ksgpc.2013.31.1.57
  11. Kwon, J.H. 2013. Model experimental study with consideration for grain composition of debris flows in Korea. Dept of Urban & Environmental System Eng. The Graduate School Seokyeong University dissertation. pp. 63.
  12. Lee, S.G., Shin, H.W., Lee, K.S., and Jung, S.H. 2008. The study on the predict and characteristics of debris landslides. KGS Spring National Confenence 2008: 427-434.
  13. Lee, M.J. and Kim, Y.T. 2013. Movement and Deposition Characteristics of Debris Flow According to Rheological Factors. Journal of the Korean Geotechnical Society 29(5): 19-27. https://doi.org/10.7843/kgs.2013.29.5.19
  14. Lee, M.S., Kim, K.S., Song, Y.S., and Ryu, J.C. 2009. Analyzed Change of Soil Characteristics by Rainfall and Vegetation. The journal of engineering geology 19(1): 33-41.
  15. Ma, H.S. and Jeong, W.O. 2010. Characteristics Analysis of Debris Flow Disaster in Korean National Parks. Journal of the Korea Society of Environmental Restoration Technology 13(4): 52-64.
  16. Ma, H.S., Kang, W.S., and Lee, S.J. 2014. Effects of Forest Environmental Factors on the Sediment Disaster Occurrence. Journal of agricultural & life sciences 48(4): 73-80.
  17. Pack, D.G. 2013. Hazard evaluation and measures establish of Debris flow. Major of Civil Engineering Graduate School of Industry Kyungpook National University Dissertation. pp. 95.
  18. Park, J.M., Ma, H.S., Kang, W.S., Oh, K.W., Pack, S.H., and Lee, S.J. 2010. Analysis of Landslide Characteristics in Jeonlabuk-do, Korea. Journal of Agricultural & Life Sciences 44(4): 9-20.
  19. Park, S.J., Lee, H.H., Joo, S.H., Heo, T.C., Lee, C.W., Jung, G.W., Kim, B.K., and Kim, H.C. 2006. Analysis on the characteristics of the Landslide in Gyeongsangbuk-Do(1). Journal of Korean Forestry Society on the Annual Conference. 2006: 397-399.
  20. Tanaka Yukiya, Yukinori Matsukura, and Kim, T.H. 2003. The central region of the Korean peninsula, granite and gneiss basin rainfall flux characteristic, The Geological Society of Korea Fall Conference 2003: 1-157.
  21. Korea Forest Service. 2013. Nation Landslide Prevention measure. http://www.forest.go.kr (2015. 01. 14).
  22. The National Weather Service. 2013. Annual Climatological Report. http://www.kma.go.kr (2015. 01 .14).

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