대한지리학회지 (Journal of the Korean Geographical Society)

대한지리학회 (The Korean Geographical Society)
권호 표지

한라산 아고산대에서의 사면 물질 이동

Slow Mass Movement on a Subalpine Slope of Mount Halla, Jeju Island

  • Kim, Tae-Ho (Department of Geography Education, Jeju National University)
  • 투고 : 2010.06.08
  • 심사 : 2010.06.18
  • 발행 : 2010.06.30
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초록

한라산 표고 1,710m에 발달한 나지 표층에 2개의 페인트 라인을 설치하여 자갈의 이동량을 관측하고, 이동 프로세스와 관련된 요인을 검토하였다. 관측 기간에 발생한 자갈의 이동량은 평균 58.2cm로서 일평균 이동 거리는 0.24cm이다. 계절별로 비교하면 동결기 0.3cm에 대하여 비동결기는 0.05cm에 불과하여 표층 자갈은 주로 동결기에 주빙하 프로세스를 통하여 이동하고 있다. 특히 서릿발 포행을 비롯한 동상 포행이 자갈의 이동을 주도하고 있다. 사면 경사각의 영향은 관측 기간 내내 측선 II의 이동량이 측선 I보다 큰 결과에 반영되어 있지만, 암괴와 식생이 자갈의 이동을 방해하므로 절대적이지는 않다. 자갈의 크기와 비중도 이동량에 관여하는 요인으로서 특히 스코리아의 작은 비중이 매우 큰 이동량을 가져왔다.

In order to investigate the rates and factors of slow mass movement on a subalpine slope of Mount Halla, two painted stone lines were monitored in a bare patch at 1,710 m a.s.l. The mean movement of surface gravels is 58.2 cm, equivalent to 0.24 cm/day. However, the rates of movement vary with seasons. Compared with 0.05 cm/day of a non-frozen season, a frozen season shows 0.3 cm/day. It implies that the movement of surface gravels could be largely controlled by periglacial processes during a frozen season. In particular, frost creep including needle ice creep plays a main role in the movement of gravels under the thermal and soil conditions which are favorable for needle ice development. Since line II is located at a steeper slope than line I, the movement of line II was always larger than that of line I. However, slope gradient is not the most dominant factor contributing the movement of gravels, which can be interrupted by downslope big gravels and vegetation patches. The size and specific weight of gravels also can influence the movement of gravels. Porous and light scoriae result in relatively quick movement of gravels on the subalpine slope of Mount Halla.

키워드

참고문헌

  1. Choi, S. G., 1988, Fossil cryogenic structures in the terrace deposit of Oship River, Samchok, Korea, Science Reports of the Tohoku University, 7th series(Geography), 38, 133-139.
  2. French, H. M., 1996, The Periglacial Environment (2nd edition), Longman, London.
  3. Grab, S. W., 2002, Turf exfoliation in the High Drakensberg, southern Africa, Geografiska Annaler, 84A, 39-50.
  4. Higashi, A., 1981, Elements of Cold Region Engineering, Kokonshoin, Tokyo (東晃, 1981, 寒地工學基礎論, 古今書院, 東京).
  5. Higashi, A. and Corte, A. E., 1971, Solifluction: A model experiment, Science, 171, 480-482. https://doi.org/10.1126/science.171.3970.480
  6. Horii, T., Matsuoka, N., and Matsukura, Y., 1987, Experimental study on soil movement due to frost creep, Bulletin of Environmental Research Center, The University of Tsukuba, 11, 21-27 (in Japanese).
  7. Jang, H., 1983, Periglacial landforms in the eastern part of the main ridge of Mt. Jiri, South Korea, Geography, 27, 31-50 (in Korean).
  8. Jeju Provincial Government, 2000, Geologic Report of the Segwipo-Hahyori Sheet, Korea Institute of Geology, Mining and Materials, Daejeon (제주도, 2000, 서귀포.하효리 도폭 지질보고서, 한국자원연구소, 대전).
  9. Jeju Regional Meteorological Office, 2007, The Detailed Climatic Characteristics of Automated Weather Stations in Jeju Island, Jeju Regional Meteorological Office, Jeju (제주지방기상청, 2007, 제주도 AWS 상세기후 특성집, 제주지방기상청, 제주).
  10. Kee, K. D., 1999, Morpho-pedologic Milieu in Taegwallyong Area, Ph.D. Dissertation, Korea National University of Education (in Korean).
  11. Kim, C. and Kim, M., 1985, Phytosociological study of grassland and scrub on subalpine zone in Mt. Halla, Report of Survey and Study of Mt. Halla, 311-330 (in Korean).
  12. Kim, T., 2001, Earth hummocks on the crater floor of Baegnokdam at Mt. Halla, Journal of the Korean Geographical Society, 36, 233-246 (in Korean).
  13. Kim, T., 2006, Rates and processes of bare patch denudation in the subalpine grassland of Mt. Halla, Journal of the Korean Geographical Society, 41, 657-669 (in Korean).
  14. Kim, T., 2008, Thufur and turf exfoliation in the subalpine grassland of Mt Halla in Jeju Island, Korea, Mountain Research and Development, 28, 272-278. https://doi.org/10.1659/mrd.0890
  15. King, R. B., 1971, Vegetation destruction in the subalpine and alpine zones of the Cairngorm Mountains, Scottish Geographical Magazine, 87, 103-115. https://doi.org/10.1080/00369227108736185
  16. Koaze, T., 1983, Slow mass movement in periglacial regions, Transactions Japanese Geomorphological Union, 4, 189-203 (in Japanese).
  17. Kong, W. S., 1999, The vertical distribution of air temperature and thermal amplitude of alpine plants on Mt. Halla, Cheju Island, Korea, Journal of the Korean Geographical Society, 34, 385-394 (in Korean).
  18. Kwon, H. J., 1999, Geomorphology (4th eds), Bobmunsa, Seoul (권혁재, 1999, 지형학 제4판, 법문사, 서울).
  19. Kwon, S. S., 1987, A study on late Quaternary periglacial cryogenic structures of granite regolith in Korea, Journal of Geography (Jirihak Nonchong), Supplement 4, 1-120 (in Korean).
  20. Kwon, S. S., 1992, Nivation morphology at Heul-Ri in Kwangwon Province, Korea, Journal of Geography (Jirihak Nonchong), 19, 1-10 (in Korean).
  21. Lee C., Cho, T., Lee, S., and Won, K., 2007, A study of weathering characteristic of Baeknokdam trachyte in Jeju Island, The Journal of Engineering Geology, 17, 235-251 (in Korean).
  22. Lee, Y. B., 1991, The Study of Nivation Hollows in Daekwan-Ryoung Area, Master Thesis, Korea National University of Education (in Korean).
  23. Oh, K. S., 1989, Origin of Bt bands in sandy deposits, The Korean Journal of Quaternary Research, 3, 35-45 (in Korean).
  24. Oh, K. S., 2006, Cryogenic structures in superficial formation and associated periglacial morphoclimatic milieu in Korean Peninsula, Journal of the Geomorphological Association of Korea, 13, 1-17 (in Korean).
  25. Ono, Y., 1978, Pipkrakes as a periglacial process, Bulletin of Environmental Research Center, The University of Tsukuba, 2, 47-55 (in Japanese).
  26. Ono, Y., 1983, Soil erosion by pipkrakes on Tsukuba Upland, Tsukuba Environmental Studies, 7, 128-140 (in Japanese).
  27. Park, K, 1987, Study of Dune-Reddening at Cheonripo, Master Thesis, Seoul National University (in Korean).
  28. Park, K., 2000, Mountaintop block fields of the Seoraksan National Park in Kwangwon Province, Korea, Journal of the Korean Geographical Society, 35, 653-663.
  29. Sawaguchi, I. and Koaze, T., 1998, Field experiment on periglacial mass movement and frost heave in the Kitakami mountains, northwestern Japan, Transactions Japanese Geomorphological Union, 19, 221-242 (in Japanese).
  30. Shoma, H., Okazawa, S., and Iwata, S., 1979, Slow massmovement processes in an apline region of Mt. Shirouma Dake, the Japan Alps, Geographical Review of Japan, 52, 562-579 (in Japanese). https://doi.org/10.4157/grj.52.562
  31. Sin, J., Yu, K, Naruse, T., and Hayashida, A., 2004, Study on loess-paleosol stratigraphy of Quaternary unconsolidated sediments at E55S20-IV pit of Chongokni Paleolithic site, Journal of the Geological Society of Korea, 40, 369-381 (in Korean).
  32. Suzuki, I., 1992, Movements of surface gravels on bare ground in the Tanigawa Mountains, central Japan, showing the relationship between periglacial and non-periglacial processes, Geographical Review of Japan, 65A, 75-91 (in Japanese).
  33. Tamanyu, S., 1990, The K-Ar ages and their stratigraphic interpretation of the Cheju Island volcanics, Korea, Bulletin of the Geological Survey of Japan, 41, 527-537 (in Japanese).
  34. Washburn, A. L., 1980, Geocryology: A Survey of Periglacial Processes and Environments, John Wiley, New York.
  35. Yim, Y., Paik, K., and Yi, N., 1991, The Vegetation of Mt. Halla, Chungang University Press, Seoul (임양재.백광수.이남주, 1991, 한라산의 식생, 중앙대학교 출판부, 서울).