Recent Trends in Application of Electrical Resistivity Tomography for Landslide Study

Falae, Philips Omowumi; Kanungo, Debi Prasanna; Chauhan, P. K. S.; Dash, Rajesh Kumar

doi:10.1007/978-981-13-2116-0_16

Cited by 11 publications

(8 citation statements)

References 38 publications

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“…Interpretations were made on the basis of the ERT results obtained along and across the landslide area in conjunction with the results obtained from the borehole investigation and other similar work carried out in the Indian Himalayas and around the world (Sastry and Mondal, 2013;Khalil et al, 2018;Pappalardo et al, 2018;Falae et al, 2019b;Cebulski et al, 2020). Three distinctive geological formations are observed to be present within the subsurface, and these are clearly shown by the wide resistivity variation of the subsurface materials as listed in Table 2.…”

Section: Geophysical Investigationmentioning

confidence: 95%

“…in the subsurface, and these are also the same factors responsible for the instability of the slope (Piegari et al, 2009;Blahova et al, 2013;Boyle et al, 2017;Falae et al, 2019a). ERT has been used by various researchers for ground movement investigations and for providing insight into the slope geometry and characterization of the subsurface regime of the slope (Perrone et al, 2004;Lapenna et al, 2005;Sumanovac, 2006;Lee et al, 2008;Sass et al, 2008;Shan et al, 2013;Khalil et al, 2018;Pappalardo et al, 2018;Falae et al, 2019b).…”

Section: E T H O D O L O G Ymentioning

confidence: 99%

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Geo‐integrated assessment of the landslide zone around Gadora along NH 58 of the Garhwal Himalayas, India

Falae

Dash

Samanta

et al. 2021

Near Surface Geophysics

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The Gadora village landslide zone situated along National Highway 58 has become very active in recent years. The landslide zone is causing a lot of damage to property along the highway and endangering the lives of people living uphill and downhill of the slopes. In the present study, a combined geological, geophysical and geotechnical investigation has been carried out to establish the subsurface layering system of the landslide. Undisturbed and disturbed samples were collected along the depth of the boreholes to determine the engineering properties of different layers. The subsurface layering and drainage patterns of the slope were inferred from electrical resistivity tomography conducted at different stretches of the slope. The present paper describes the layering system along with the engineering and physical properties obtained from the integrated geo-investigation. The established near-surface geometric, hydrological and material model enabled the stability study of the slope.

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Section: Geophysical Investigationmentioning

confidence: 95%

Section: E T H O D O L O G Ymentioning

confidence: 99%

Geo‐integrated assessment of the landslide zone around Gadora along NH 58 of the Garhwal Himalayas, India

Falae

Dash

Samanta

et al. 2021

Near Surface Geophysics

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“…It is used to determine the distribution of resistivity in the subsurface. It is a well-established non-invasive technique for subsurface investigation, and the details about the technique can be found in Falae et al (2019b).…”

Section: Electrical Resistivity Tomographymentioning

confidence: 99%

Interpretation on water seepage and degree of weathering in a landslide based on pre‐ and post‐monsoon electrical resistivity tomography

Falae

Dash

Kanungo

et al. 2021

Near Surface Geophysics

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The influence of rainfall on the Pakhi landslide has been examined using a pre-and post-monsoon timelapse electrical resistivity imaging technique. The results obtained have been used to characterize the subsurface based on the depth and degree of water seepage and degree of weathering. The combined interpretation of pre-and postmonsoon electrical resistivity tomography is not very common in landslide characterization. This study focuses on post-monsoon electrical resistivity tomography investigation and its interpretation in conjunction with earlier research on pre-monsoon investigations. The advancing water seepage across depth was reflected in the sharp decrease in the post-monsoon resistivity value of the top (near-surface) colluvial layer, mostly at the crown and toe portions of the investigated slope, as compared to that of weathered dolomites and fresh dolomites. Hence, the water-saturated colluvium deposits could easily be delineated using a timelapse pre-and post-monsoon electrical resistivity tomography technique. On the basis of degree of saturation, the materials were classified into four zones, namely: a highly saturated zone with resistivity values <600 m; a fairly saturated zone with resistivity values 600-2500 m; a low saturated zone with resistivity values 2500-4500 m; and an unsaturated zone with resistivity values >4500 m. Further, a twofold classification of dolomites based on the degree of weathering, namely highly weathered dolomites with resistivity values 1000-2500 m and low weathered dolomites with resistivity values 2500-4500 m, is presented. This type of information will add value to the design of landslide-monitoring programmes and also for landslide stability analysis. Therefore, the method can be highly recommended as a cost-and time-effective as well as an efficient way for characterization of potential landslide slopes.

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“…For a slope with high vegetation coverage, this phenomenon might be further exacerbated. With a lower resolution and greater penetration depths than GPR in conductive environments, the ERT technique has been used widely for various landslides, from rockslides to debris slides, in different geological environments from rock to soil materials, to identify the slip surface and hydrological conditions, depict the internal structures, monitor the movement, and disclose the underground faults and cracks [28][29][30][31][32][33][34]. Falae et al [31] discussed the recent trend in applying ERT in landslide studies.…”

Section: Introductionmentioning

confidence: 99%

“…With a lower resolution and greater penetration depths than GPR in conductive environments, the ERT technique has been used widely for various landslides, from rockslides to debris slides, in different geological environments from rock to soil materials, to identify the slip surface and hydrological conditions, depict the internal structures, monitor the movement, and disclose the underground faults and cracks [28][29][30][31][32][33][34]. Falae et al [31] discussed the recent trend in applying ERT in landslide studies. This method relies on measuring the electrical properties between two electrodes when transmitting a pulsed current between two other electrodes, which allows for characterizing the unsteady body compared with the material having different electrical potentials.…”

Section: Introductionmentioning

confidence: 99%

Combined ERT and GPR Data for Subsurface Characterization of Weathered Hilly Slope: A Case Study in Zhejiang Province, Southeast China

Yan

Zhao

et al. 2022

Sustainability

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Rain-triggered landslides frequently threaten public safety, infrastructure, and the economy during typhoon seasons in Zhejiang Province. Landslides are complex structural systems, and the subsurface features play a significant role in their stability. Their early identification and the evaluation of potential danger in terms of the rupture surface and unstable body are essential for geohazard prevention and protection. However, the information about the subsurface acquired by conventional exploration approaches is generally limited to sparse data. This paper describes a joint application of ground-penetrating radar (GPR) with a 100 MHz antenna and the electrical resistivity tomography (ERT) method with the Wenner configuration to identify the stratum structure and delineate the potentially unstable body of a clay-rich slope, the results of which were further verified using borehole data and field observation. The acquired results from the GPR and ERT surveys, consistent with each other, indicate two stratigraphic layers comprising silty clay and silty mudstone. Moreover, the potential rupture zone very likely exists in the highly weathered mudstone in the depth range of 3–7 m, and the average depth is 5 m. In addition, the thickness of the unstable mass is greater on the east and crest parts of the slope. Conclusively, the optimum combination of ERT and GPR is reliable for conducting rapid and effective delineation of subsurface characteristics of clayey slopes for risk assessment and mitigation during the typhoon season.

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Recent Trends in Application of Electrical Resistivity Tomography for Landslide Study

Cited by 11 publications

References 38 publications

Geo‐integrated assessment of the landslide zone around Gadora along NH 58 of the Garhwal Himalayas, India

Geo‐integrated assessment of the landslide zone around Gadora along NH 58 of the Garhwal Himalayas, India

Interpretation on water seepage and degree of weathering in a landslide based on pre‐ and post‐monsoon electrical resistivity tomography

Combined ERT and GPR Data for Subsurface Characterization of Weathered Hilly Slope: A Case Study in Zhejiang Province, Southeast China

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