Abstract
Rainfall-induced shallow landslides are known to be extremely dangerous since the sliding mass can propagate quickly and travel far from the source. Although the sliding mechanism in sloping ground is simple to understand, the problem may be complicated by unsaturated transient water flow. The flow behavior of rainwater in unsaturated sloping ground and the consequent factor of safety must be clearly understood to assess slope stability under rainfall conditions. A series of laboratory experiments was conducted to examine the critical hydrological states so that assessment of slope stability under rainfall condition can be performed. Based on the test results, a unique relationship between critical hydrological states, rainfall intensity, and soil properties was formulated. Sequential stability analysis provided insights into the stability of slopes subjected to variations in soil properties, slope angles and rainfall intensities, and the consequent variation in the depth of the failure plane, vital in landslide risk assessment, was determined through this analysis. The variation of rainfall intensity was found to strongly affect the depth of the failure plane in cohesionless sloping ground. Furthermore, the influence of rainfall intensity on the depth of the failure plane may be alleviated by a small magnitude of cohesive strength. The results of this study will reinforce knowledge of landslide behavior and help to improve mitigation measures in susceptible areas.
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Ali A, Huang J, Lyamin AV, et al. (2014) Simplified quantitative risk assessment of rainfall-induced landslides modelled by infinite slopes. Engineering Geology 179: 102–116. https://doi.org/10.1016/j.enggeo.2014.06.024
Burylo M, Hudek C, Rey F (2011) Soil reinforcement by the roots of six dominant species on eroded mountainous marly slopes (Southern Alps, France). Catena 84: 70–78. https://doi.org/10.1016/j.catena.2010.09.007
Chaminda GPK (2006) Real-time prediction of rain-induced embankment by minimum measurements with back-analysis for SWCC parameters. The University of Tokyo Japan.
Chinkulkijniwat A, Yubonchit S, Horpibulsuk S, et al. (2016) Hydrological responses and stability analysis of shallow slopes with cohesionless soil subjected to continuous rainfall. Canadian Geotechnical Journal 53(12): 2001–2013. https://doi.org/10.1139/cgj-2016-0143
Chu ST (1978) Infiltration during an unsteady rain. Water Resources Research 17(3): 461–466. https://doi.org/10.1029/WR014i003p00461
Duncan JM, Wright SG (2005) Soil strength and slope stability. Scitech Book News; Portland 29(4): 297.
Gabet EJ, Mudd SM (2006) The mobilization of debris flows from shallow landslides. Geomorphology 74: 207–218. https://doi.org/10.1016/j.geomorph.2005.08.013
Green WH, Ampt C A (1911) Studies on soil physics: flow of air and water through soils. Journal of Agriculture Science 4: 1–24. https://doi.org/10.1017/S0021859600001441
Guzzeti F, Peruccacci S, Rossi M, et al. (2008) The rainfall intensity-duration control of shallow landslides and debris flows: an update. Landslides 5: 3–17. https://doi.org/10.1007/s10346-007-0112-1
Lee LM, Kassim A, Gofar N (2011) Performances of two instrumented laboratory models for the study of rainfall infiltration into unsaturated soils. Engineering Geology 117: 78–89. https://doi.org/10.1016/j.enggeo.2010.10.007
Li WC, Lee LM, Cai H, et al. (2013) Combined roles of saturated permeability and rainfall characteristics on surficial failure of homogeneous soil slope. Engineering Geology 153: 105–113. https://doi.org/10.1016/j.enggeo.2012.11.017
Lu N, Griffiths DV (2004) Profiles of steady-state suction stress in unsaturated soils. Journal of Geotechnical and Geoenvironmental Engineering 130(10): 1063–1076. https://doi.org/10.1061/(ASCE)1090-0241(2004)130:10(1063)
Lu N, Likos WJ (2006) Suction stress characteristic curve for unsaturated soil. Journal of Geotechnical and Geoenvironmental Engineering 132(2): 131–142. https://doi.org/10.1061/(ASCE)1090-0241(2006)132:2(131)
Mein RG, Larson CL (1973) Modeling infiltration during a steady rain. Water Resources Research 9(2): 384–394. https://doi.org/10.1029/wr009i002p00384
Naidu S, Sajinkumar KS, Oommen T, et al. (2018) Early warning system for shallow landslides using rainfall threshold and slope stability analysis. Geoscience Frontiers 9(6): 1871–1882. https://doi.org/10.1016/j.gsf.2017.10.008
Postance B, Hillier J, Dijkstra T, et al. (2018) Comparing threshold definition techniques for rainfall induced landslides: a national assessment using radar rainfall. Earth Surface Processes and Landforms 43: 553–560. https://doi.org/10.1002/esp.4202
Shimoma S, Orense R, Honda T, et al. (2002) Model tests on slope failures caused by heavy rainfall. International Congress “INTERPRAEVENT 2002” in the Pacific Rim - Matsumoto, Japan. 2: 547–557.
Tohari A, Nishigaki M, Komatsu M (2007) Laboratory rainfall-induced slope failure with moisture content measurement. Journal of Geotechnical and Geoenvironmental Engineering 133(5): 575–587. https://doi.org/10.1061/(ASCE)1090-0241(2007)133:5(575)
Tosi M (2007) Root tensile strength relationships and their slope stability implications of three shrub species in the northern Apennines (Italy). Geomorphology 87: 268–283. https://doi.org/10.1016/j.geomorph.2006.09.019
Trustrum NA, Gomez B, Page MJ (1999) Sediment production, storage and output: The relative role oflarge magnitude events in steepland catchments. Schweizerbart and Borntraeger science publishers 115: 71–86. https://doi.org/10.1127/zfgsuppl/115/1999/71
Tsai TL, Chen HE, Yang, JC (2008) Numerical modeling of rainstorm-induced shallow landslides in saturated and unsaturated soils. Environmental Geology 55(6): 1269–1277. https://doi.org/10.1007/s00254-007-1075-1
van Genuchten MT (1980) A closed-form equation for predicting the hydraulic conductivity of unsaturated soil. Soil Science Society of America Journal 44: 615–628. https://doi.org/10.2136/sssaj1980.03615995004400050002x
Wu LZ, Zhou Y, Sun P (2017) Laboratory characterization of rainfall-induced loess slope failure. Catena 150: 1–8. https://doi.org/10.1016/j.catena.2016.11.002
Yubonchit S, Chinkulkijniwat A, Horpibulsuk S, et al. (2016). Influence factors involving rainfall-induced shallow slope failure: numerical study. International Journal of Geomechanics 17(7): 04016158. https://doi.org/10.1061/(ASCE)GM.1943-5622.0000865
Yumuang S (2006) 2001 debris flow and debris flood in Nam Ko area, Phetchabun province, central Thailand. Environmental Geology 51(4): 545–564. https://doi.org/10.1007/s00254-006-0351-9
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The authors acknowledge the financial support from the Thailand Research Fund under the TRF Senior Research Scholar program (Grant No. RTA6080055), Suranaree University of Technology and the Office of Higher Education Commission under NRU project of Thailand.
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Chinkulkijniwat, A., Tirametatiparat, T., Supotayan, C. et al. Stability characteristics of shallow landslide triggered by rainfall. J. Mt. Sci. 16, 2171–2183 (2019). https://doi.org/10.1007/s11629-019-5523-7
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DOI: https://doi.org/10.1007/s11629-019-5523-7