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2022 Vol.32, Issue 4 Preview Page

Research Article

A Long-Runout Landslide Triggered by Extreme Rainfall in Gokseong, South Korea on 7 August 2020
Kounghoon Nam1
,
Fawu Wang2
,
Zili Dai3
,
Jongtae Kim4
,
Chang Oh Choo5
,
Gyo-Cheol Jeong6*
1Post-Doctor, College of Civil Engineering, Tongji University, China
2Professor, College of Civil Engineering, Tongji University, China
3Associate Professor, Department of Civil Engineering, Shanghai University, China
4CEO, Nature and Tech Inc.
5Research Professor, Department of Earth and Environmental Sciences, Andong National University
6Professor, Department of Earth and Environmental Sciences, Andong National University
*Corresponding Author
31 December 2022. pp. 571-583
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Abstract

On 7 August 2020, a large-scale catastrophic landslide was triggered by extreme rainfall at Osan village, Gokseong County, South Jeolla Province, South Korea. The initiation mechanism of the Gokseong landslide was different from those typical landslides that occurred in South Korea. Despite the relatively low elevation and slope degree, the landslide had a long runout distance of about 640 m over a total vertical distance of 90 m. A detailed field investigation and chemical analysis were conducted to understand the possible mechanisms for the high-speed and long-runout behavior of the landslide. The terrain controlled the motion behavior of the landslide and the seepage was observed at the whole landslide body. The clay-rich soils covered on granite bedrock of the landslide deposition area from the rice paddy field to the landslide crown. The results of this study may provide basic data for further research on the mechanisms for landslide initiation and propagation.

Keywords
Gokseong landslide
long-runout landslide
clay soils
field investigation
chemical analysis
References
1
Aksu, I., Bazilevskaya, E., Karpyn, Z.T., 2015, Swelling of clay minerals in unconsolidated porous media and its impact on permeability, GeoResJ, 7, 1-13. 10.1016/j.grj.2015.02.003
2
Baldermanna, A., Dietzel, M., Reinprecht, V., 2021, Chemical weathering and progressing alteration as possible controlling factors for creeping landslides, Science of the Total Environment, 778, 1-13. 10.1016/j.scitotenv.2021.14630033721644
3
Braganza, L.F., Crawford, R.J., Smalley, M.V., Thomas, R.K., 1990, Swelling of n-butylammonium vermiculite in water, Clays and Clay Minerals, 38, 90-96. 10.1346/CCMN.1990.0380112
4
Brigatti, M.F., Laurora, A., Malferrari, D., Medici, L., Poppi, L., 2005, Adsorption of [Al(Urea)6]3+ and [Cr(Urea)6]3+ complexes in the vermiculite interlayer, Applied Clay Science, 30, 21-32. 10.1016/j.clay.2005.03.001
5
Carrière, S.R., Jongmans, D., Chambon, G., Bièvre, G., Lanson, B., Bertello, L., Berti, M., Jaboyedoff, M., Malet, J.P., Chambers, J.E., 2018, Rheological properties of clayey soils originating from flow-like landslides, Landslides, 15, 1615-1630. 10.1007/s10346-018-0972-6
6
Choi, S.K., Ramirez, R.A., Kwon, T.H., 2021, Preliminary report of a catastrophic landslide that occurred in Gokseong County, South Jeolla Province, South Korea, on August 7, 2020, Landslides, 18, 1465-1469. 10.1007/s10346-020-01616-y
7
Christidis, G.E., Blum, A.E., Eberl, D.D., 2006, Influence of layer charge and charge distribution of smectites on the flow behaviour and swelling of bentonites, Applied Clay Science, 34, 125-138. 10.1016/j.clay.2006.05.008
8
Dultz, S., Jong-Hyok, A., Riebe, B., 2012, Organic cation exchanged montmorillonite and vermiculite as adsorbents for Cr(VI): Effect of layer charge on adsorption properties, Applied Clay Science, 125-133. 10.1016/j.clay.2012.05.004
9
Jung, H., Kang, D., Kim, E., Getirana, A., Yoon, Y., Kumar, S., Peters, C., Hwang, E., 2020, Towards a soil moisture drought monitoring system for South Korea, Journal of Hydrology, 589, 1-10. 10.1016/j.jhydrol.2020.125176
10
Nam, K.H., Lee, M.J., Jeong, G.C., 2016, Landslide susceptibility analysis : SVM application of spatial databases considering clay mineral index values extracted from an ASTER satellite image, The Journal of Engineering Geology, 26(1), 23-32 (in Korean with English abstract). 10.9720/kseg.2016.1.23
11
Son, C., Kim, S., 1966, Geological map of 1:50,000 scale in ChangPyeong, Korea Institute of Geoscience and Mineral Resources, 30p.
12
Tjong, S.C., 2006, Structural and mechanical properties of polymer nanocomposites, Materials Science and Engineering R, 53, 73-197. 10.1016/j.mser.2006.06.001
13
Wang, F.W., Wu, Y., Yang, H., Tanida, Y., Kamei, A., 2015, Preliminary investigation of the 20 August 2014 debris flows triggered by a severe rainstorm in Hiroshima City, Japan, Geoenvironmental Disasters, 2(17), 1-16. 10.1186/s40677-015-0025-6
14
Watkinson, I.M., Hall, R., 2019, Impact of communal irrigation on the 2018 Palu earthquake-triggered landslides, Nature Geoscience, 12, 940-945. 10.1038/s41561-019-0448-x
15
Zemanová, M., Link, G., Takayama, S., Nüesch, R., Janek, M., 2006, Modification of layer charge in smectites by microwaves, Applied Clay Science, 32, 271-282. 10.1016/j.clay.2006.01.002
Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 32
  • No :4
  • Pages :571-583
  • Received Date : 2022-11-16
  • Revised Date : 2022-12-08
  • Accepted Date : 2022-12-12
  • DOI :https://doi.org/10.9720/kseg.2022.4.571
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