The identified origin of a linear slope near Chi–Chi earthquake rupture combining 2D, 3D resistivity image profiling and geological data

Lee, Cheng-Chao; Tsai, Lung Chih; Yang, Chia‐Ning; Wen, Kuo‐Liang; Wang, Zibin; Hsieh, Zhi-Hsian; Liu, Hsing-Chang

doi:10.1007/s00254-008-1642-0

Cited by 6 publications

(2 citation statements)

References 17 publications

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“…As seen in Table 3, four groups of resistivity values were measured and classified as low (<12 ohm-m), moderate-low (12~20 ohm-m), moderate-high (20~60 ohm-m) and high (>60 ohm-m). The resistivity groups were determined by comparing the resistivity categories as proposed by Palacky [45], Meads et al [46], and Lee et al [47] with the borehole data. Due to lateral offset in space and accuracy in sounding for the ERI profiles and the associated borehole logs, there might exist some discrepancies in the interpretation of the type of earthen materials that were encountered in the Petobo site.…”

Section: Eri Profilesmentioning

confidence: 99%

Assessment of Petobo Flowslide Induced by Soil Liquefaction during 2018 Palu–Donggala Indonesian Earthquake

et al. 2023

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This paper presents the results of the subsurface investigation and liquefaction assessment of the Petobo flowslide, induced by soil liquefaction during the Mw 7.5 Palu–Donggala earthquake of Indonesia on 28 September 2018. The investigations, including drilling, standard penetration tests, electrical resistivity imaging survey, dynamic probing, groundwater table monitoring, etc., were conducted along the main road that passes through the middle of the flowslide area. Liquefaction assessments and flowslide simulations were carried out with three assumed scenarios. Scenario 1 describes the condition if the flowslide were to be retriggered at the cease of sliding due to the same earthquake striking the site. Scenarios 2 and 3 attempt to examine the influence of locally raised groundwater levels due to the infiltration of the Gumbasa irrigation system and widespread paddy fields of the site as a result of soil liquefaction and the flowslide. Subsurface investigations revealed that, within a 30-m depth of the ground, the sliding area generally consists of sandy deposits of SM/SP/SW, except for the toe portion where thick layers of silt (ML) and clay (CL) were found. The results of field testing and liquefaction assessment identify potentially weak and liquefiable zones which enable the construction of a speculated slip surface for the flowslide. Both liquefaction assessment and flowslide simulations verify that soil liquefaction would be triggered during the earthquake as a result of locally raised groundwater tables, and that a gentle slope (≈3°) that provides static shears would lead to long-distance sliding after shaking. Should the locally raised groundwater tables not exist, the results indicate no soil liquefaction and no flowslide.

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Section: Eri Profilesmentioning

confidence: 99%

Assessment of Petobo Flowslide Induced by Soil Liquefaction during 2018 Palu–Donggala Indonesian Earthquake

et al. 2023

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“…The study area (Figure 1) is located in the water catchment area of the Deji Reservoir, and it was believed to be a large-scale ancient landslip covering a total area of more than 100 hectares and consisted of several small sliding bodies [7]. The Tabuk settlement is located at the north-east corner of the study area (Figure 2) and at an altitude of about 1800 m. The settlement is about 8.5 km from the location of the Lishan large-scale landslide, which occurred in mid-April 1990 [8]. Lishan, literally meaning "Pear Mountain", is one of the popular tourist destinations for those who would like to get away from the heat in the summer and enjoy the snowy scenery in the winter and those who would like to experience the culture of Indigenous People or sight seeing along the hunting trails around the village.…”

Section: Background Of Study Areamentioning

confidence: 99%

Hazard Mitigation of a Landslide-Prone Area through Monitoring, Modeling, and Susceptibility Mapping

Gui

Chu

Ding³

et al. 2023

Water

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Indigenous tribes living in the mountainous areas account for about one-fifth of the extreme poor of the world, and this has made their lives more vulnerable to climate change impacts and natural hazards. After a series of earthquakes and very strong typhoons, the tilting and cracking of dwellings, localized slope failure, and severe subgrade settlements, together with damages of retaining structures and drainage ditches along a section of the Provincial Highway No. 7A on the west wing of the Central Mountain Range in central Taiwan, have raised concerns to the safety of a nearby Indigenous settlement, which is situated at an elevation of about EL. +1800 m. This study investigated and identified the possible causes for a large-scale landslide-prone area on the Central Mountain Range by employing multi-temporal satellite and aerial images, site investigation, field instrumentation, geophysics tests, and uncoupled hydromechanical slope stability analyses. The results were then applied to deduce a sliding susceptibility map and remedial plans to prevent or mitigate the sliding in the vicinity of an Indigenous settlement. The infiltration of rainwater, an upraised river-bed elevation, and the erosion of the river bank at the toe of the large-scale slope were found to be the main triggering factors in inducing sudden and localized failures. Meanwhile, the process of mass rock creep was deduced to have activated the process of large-scale deep-seated gravitational slope deformation (DSGSD) on the study slope; the DSGSD could eventually turn into a huge and catastrophic landslide. The findings of this study would be valuable for formulating detailed countermeasures to protect and maintain the stability and safety of the Indigenous settlement located at the crest of the slope.

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Preliminary Field Study of the Petobo Flow Slide After the 2018 Indonesia Palu Liquefaction

Upomo,

Chang,

Kusumawardani

et al. 2024

Advances in Science, Technology &Amp; Innovation

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The identified origin of a linear slope near Chi–Chi earthquake rupture combining 2D, 3D resistivity image profiling and geological data

Cited by 6 publications

References 17 publications

Assessment of Petobo Flowslide Induced by Soil Liquefaction during 2018 Palu–Donggala Indonesian Earthquake

Assessment of Petobo Flowslide Induced by Soil Liquefaction during 2018 Palu–Donggala Indonesian Earthquake

Hazard Mitigation of a Landslide-Prone Area through Monitoring, Modeling, and Susceptibility Mapping

Preliminary Field Study of the Petobo Flow Slide After the 2018 Indonesia Palu Liquefaction

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