Electrical resistivity tomography (ERT) based subsurface characterisation of Pakhi Landslide, Garhwal Himalayas, India

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

doi:10.1007/s12665-019-8430-x

Cited by 45 publications

(22 citation statements)

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“…The major advantage of this technique is that the resistivity values depend on the clay contents, degree of weathering, moisture contents, degree of fracture, etc. 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%

“…The establishment of near-surface geometric, material and hydrological models of hill slopes is important for stability assessment of landslide zones and subsequently important for the effective design of control measures for landslide disaster mitigation. Various researchers have investigated landslide areas using borehole explorations (Siddique et al, 2015;Gupta et al, 2016;Khamkar et al, 2018) and geophysical methods (Beres et al, 2002;Grandjean and Leparoux, 2004;Merritt et al, 2014;Uhlemann et al, 2017;Claudio et al, 2018;Crawford et al, 2018;Mita et al, 2018;Pappalardo et al, 2018;Falae et al, 2019a;Whiteley et al, 2019) separately. However, some researchers have also applied a multidisciplinary approach (Merritt et al, 2014; Ausilio and Figure 1 Geological map of the study area indicating the location of the Gadora landslide zone.…”

Section: Introductionmentioning

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: E T H O D O L O G Ymentioning

confidence: 99%

Section: Introductionmentioning

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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“…In DD entire array of electrodes is moved. Array details can be found in Falae et al (2019). The electrode spacing of 5 and 8 m were adopted because DD array sometimes misleads the landslide slip surface estimation, if large electrode spacing (current and potential) is applied (Loke 2004;Rezaei et al 2019).…”

Section: Data Acquisition and Processingmentioning

confidence: 99%

Characterization of Sobradinho landslide in fluvial valley using MASW and ERT methods

Hussain

Omar²,

Cárdenas‐Soto

et al. 2020

REM, Int. Eng. J.

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Landslides can substantially impact the fluvial systems, which is why the continuous mapping of their extent, evolution and stability assessment is crucial. However, in such environments, material identification (e.g. colluvium) and subsurface characterization by the methods used for geologic mapping and geotechnical investigation is often a challenging task. Thus, these classical invasive methods may benefit from geophysical techniques to enable and enhance our understanding of the subsurface in these areas. To examine such integrated approach, Multi-Channel Analysis of Surface Waves (MASW) combined with Electrical Resistivity Tomography (ERT) were applied on a geomorphologically active fluvial valley in Sobradinho (the Federal District of Brazil). The subsurface materials showed a specific range of resistivity values as dry soil, saprolite, and landslide slip surface. The 1D shear wave velocity (Vs) model showed an increasing trend of Vs with depth at a location away from the landslide mass, while the longitudinal profile (over the landslide) showed an anomalous change in Vs (~ 250 to 400 m/sec). Based on the existing information about the landslide, the ERT appeared to be an effective method over MASW. This study shows how the integration of geophysical data with the geological and geotechnical investigation helps to obtain a more realistic or unambiguous model of the subsurface.

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“…In situ ground-based observation of slope movement using various instruments (extensometers, inclinometers, and tiltmeters) and installing rain gauges to accumulate local rainfall data. For example, Dikshit et al [54] used tilt sensors for Darjeeling Himalayas, while Falae et al [55] used Electrical resistivity tomography (ERT) for Garhwal Himalayas.…”

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confidence: 99%

“…Kannaujiya et al [59] compared slide dimensions observed from satellite (IRS LISS-IV) with geophysical investigation and determined the depth and slip surface geometry using 2D ERT and GPR) for Kaliganga river valley in Uttarakhand. Falae et al [55] used ERT to understand the subsurface movement to determine the probable failure plane of the Pakhi landslide, Uttarakhand. Sharma et al [60] conducted a geophysical study at Lanta Khola Landslide, Sikkim using very low-frequency (VLF) electromagnetic survey to understand the subsurface structure.…”

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confidence: 99%

Rainfall Induced Landslide Studies in Indian Himalayan Region: A Critical Review

et al. 2020

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Landslides are one of the most devastating and recurring natural disasters and have affected several mountainous regions across the globe. The Indian Himalayan region is no exception to landslide incidences affecting key economic sectors such as transportation and agriculture and often leading to loss of lives. As reflected in the global landslide dataset, most of the landslides in this region are rainfall triggered. The region is prone to 15% of the global rainfall-induced landslides, and thereby a review of the studies in the region is inevitable. The high exposure to landslide risk has made the Indian Himalayas receive growing attention by the landslides community. A review of landslides studies conducted in this region is therefore important to provide a general picture of the state-of-the-art, a reference point for researchers and practitioners working in this region for the first time, and a summary of the improvements most urgently needed to better address landslide hazard research and management. This article focuses on various studies ranging from forecasting and monitoring to hazard and susceptibility analysis. The various factors used to analyze landslide are also studied for various landslide zones in the region. The analysis reveals that there are several avenues where significant research work is needed such as the inclusion of climate change factors or the acquisition of basic data of highest quality to be used as input data for computational models. In addition, the review reveals that, despite the entire region being highly landslide prone, most of the studies have focused on few regions and large areas have been neglected. The aim of the review is to provide a reference for stakeholders and researchers who are currently or looking to work in the Indian Himalayas, to highlight the shortcomings and the points of strength of the research being conducted, and to provide a contribution in addressing the future developments most urgently needed to obtain a consistent advance in landslide risk reduction of the area.

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Electrical resistivity tomography (ERT) based subsurface characterisation of Pakhi Landslide, Garhwal Himalayas, India

Cited by 45 publications

References 50 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

Characterization of Sobradinho landslide in fluvial valley using MASW and ERT methods

Rainfall Induced Landslide Studies in Indian Himalayan Region: A Critical Review

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