Rainfall-induced landslides by deficit field matric suction in unsaturated soil slopes
Landslides are mainly triggered by decrease in the matric suction with deepening the wetting band by rainfall infiltrations. This paper reports rainfall-induced landslides in partially saturated soil slopes through a field study. A comprehensive analysis on Umyeonsan (Mt.) landslides in 2011 was hig...
| Հիմնական հեղինակներ: | , , , |
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| Այլ հեղինակներ: | |
| Ձևաչափ: | Journal Article |
| Լեզու: | English |
| Հրապարակվել է: |
2019
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| Խորագրեր: | |
| Առցանց հասանելիություն: | https://hdl.handle.net/10356/104488 http://hdl.handle.net/10220/50024 |
| _version_ | 1826126533571379200 |
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| author | Kim, Junghwan Kim, Yongmin Jeong, Sangseom Hong, Moonhyun |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Kim, Junghwan Kim, Yongmin Jeong, Sangseom Hong, Moonhyun |
| author_sort | Kim, Junghwan |
| collection | NTU |
| description | Landslides are mainly triggered by decrease in the matric suction with deepening the wetting band by rainfall infiltrations. This paper reports rainfall-induced landslides in partially saturated soil slopes through a field study. A comprehensive analysis on Umyeonsan (Mt.) landslides in 2011 was highlighted. The incident involves the collapse of unsaturated soil slopes under extreme-rainfall event. Fundamental studies on the mechanism and the cause of landslides were carried out. A number of technical findings are of interest, including the failure mechanism of a depth of soil and effect of groundwater flow, the downward movement of wetting band and the increase of groundwater level. Based on this, an integrated analysis methodology for a rainfall-induced landslide is proposed in this paper that incorporates the field matric suction for obtaining hydraulic parameters of unsaturated soil. The field matric suction is shown to govern the rate of change in the water infiltration for the landslide analysis with respect to an antecedent rainfall. Special attention was given to a one-dimensional infiltration model to determine the wetting band depth in the absence of the field matric suction. The results indicate that landslide activities were primarily dependent on rainfall infiltration, soil properties, slope geometries, vegetation, and groundwater table positions. The proposed methodology has clearly demonstrated both shallow and deep-seated landslides and shows good agreement with the results of landslide investigations. |
| first_indexed | 2024-10-01T06:53:54Z |
| format | Journal Article |
| id | ntu-10356/104488 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:53:54Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/1044882020-03-07T11:45:56Z Rainfall-induced landslides by deficit field matric suction in unsaturated soil slopes Kim, Junghwan Kim, Yongmin Jeong, Sangseom Hong, Moonhyun School of Civil and Environmental Engineering Engineering::Environmental engineering Slope Landslide Landslides are mainly triggered by decrease in the matric suction with deepening the wetting band by rainfall infiltrations. This paper reports rainfall-induced landslides in partially saturated soil slopes through a field study. A comprehensive analysis on Umyeonsan (Mt.) landslides in 2011 was highlighted. The incident involves the collapse of unsaturated soil slopes under extreme-rainfall event. Fundamental studies on the mechanism and the cause of landslides were carried out. A number of technical findings are of interest, including the failure mechanism of a depth of soil and effect of groundwater flow, the downward movement of wetting band and the increase of groundwater level. Based on this, an integrated analysis methodology for a rainfall-induced landslide is proposed in this paper that incorporates the field matric suction for obtaining hydraulic parameters of unsaturated soil. The field matric suction is shown to govern the rate of change in the water infiltration for the landslide analysis with respect to an antecedent rainfall. Special attention was given to a one-dimensional infiltration model to determine the wetting band depth in the absence of the field matric suction. The results indicate that landslide activities were primarily dependent on rainfall infiltration, soil properties, slope geometries, vegetation, and groundwater table positions. The proposed methodology has clearly demonstrated both shallow and deep-seated landslides and shows good agreement with the results of landslide investigations. Accepted version 2019-09-26T07:44:05Z 2019-12-06T21:33:56Z 2019-09-26T07:44:05Z 2019-12-06T21:33:56Z 2017 Journal Article Kim, J., Kim, Y., Jeong, S., & Hong, M. (2017). Rainfall-induced landslides by deficit field matric suction in unsaturated soil slopes. Environmental Earth Sciences, 76(23), 808-. doi:10.1007/s12665-017-7127-2 1866-6280 https://hdl.handle.net/10356/104488 http://hdl.handle.net/10220/50024 10.1007/s12665-017-7127-2 en Environmental Earth Sciences This is a post-peer-review, pre-copyedit version of an article published in Environmental Earth Sciences. The final authenticated version is available online at: http://dx.doi.org/10.1007/s12665-017-7127-2 31 p. application/pdf |
| spellingShingle | Engineering::Environmental engineering Slope Landslide Kim, Junghwan Kim, Yongmin Jeong, Sangseom Hong, Moonhyun Rainfall-induced landslides by deficit field matric suction in unsaturated soil slopes |
| title | Rainfall-induced landslides by deficit field matric suction in unsaturated soil slopes |
| title_full | Rainfall-induced landslides by deficit field matric suction in unsaturated soil slopes |
| title_fullStr | Rainfall-induced landslides by deficit field matric suction in unsaturated soil slopes |
| title_full_unstemmed | Rainfall-induced landslides by deficit field matric suction in unsaturated soil slopes |
| title_short | Rainfall-induced landslides by deficit field matric suction in unsaturated soil slopes |
| title_sort | rainfall induced landslides by deficit field matric suction in unsaturated soil slopes |
| topic | Engineering::Environmental engineering Slope Landslide |
| url | https://hdl.handle.net/10356/104488 http://hdl.handle.net/10220/50024 |
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