Resistivity Imaging Using Borehole Electrical Resistivity Tomography: A Case of Land Subsidence in Karst Area Due to the Excessive Groundwater Withdrawal

AbstractBorehole-based electrical resistivity surveys have the capacity to enhance our understanding of the structure of englacial drainage pathways in temperate ice. We summarize inter-borehole electrical resistivity tomography (ERT) as currently used in hydrogeological investigations and as adapted for imaging englacial drainage. ERT connections were successfully made for the first time in glacier ice, following artificial mineralization of borehole waters at Haut Glacier d’Arolla, Switzerland. Here, two types of electrical connection were made between boreholes spaced up to 10 m apart and drilled to depths of between 20 and 60 m. Most tests indicated the presence of resistively homogeneous ice with uniform bulk resistivities of ~108- 109Ω m. However, ERT was also successfully used to identify and characterize a hydraulically conductive englacial fracture that intersected two boreholes at a depth of ~ 13 m below the glacier surface. The presence of this connecting void was suggested by drilling records and verified by dual borehole-impulse testing. The reconstructed tomogram for these boreholes is characterized by a background ice-resistivity field of ~109Ω m that is disrupted at a depth of ~13 m by a sharp, sub-horizontal low-resistivity zone (~104Ω m). Inter-borehole ERT, therefore, has the capacity to image both uniform and fractured temperate glacier ice.

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Inter-borehole electrical resistivity imaging of englacial drainage

Journal of Glaciology ◽

10.3189/s0022143000002756 ◽

1998 ◽

Vol 44 (147) ◽

pp. 429-435 ◽

Cited By ~ 2

Author(s):

Bryn Hubbard ◽

Andrew Binley ◽

Lee Slater ◽

Roy Middleton ◽

Bernd Kulessa

Keyword(s):

Electrical Resistivity ◽

Electrical Resistivity Tomography ◽

Electrical Resistivity Imaging ◽

Glacier Surface ◽

Resistivity Tomography ◽

Resistivity Imaging ◽

Low Resistivity ◽

Glacier Ice ◽

First Time ◽

Englacial Drainage

AbstractBorehole-based electrical resistivity surveys have the capacity to enhance our understanding of the structure of englacial drainage pathways in temperate ice. We summarize inter-borehole electrical resistivity tomography (ERT) as currently used in hydrogeological investigations and as adapted for imaging englacial drainage. ERT connections were successfully made for the first time in glacier ice, following artificial mineralization of borehole waters at Haut Glacier d’Arolla, Switzerland. Here, two types of electrical connection were made between boreholes spaced up to 10 m apart and drilled to depths of between 20 and 60 m. Most tests indicated the presence of resistively homogeneous ice with uniform bulk resistivities of ~108 - 109 Ω m. However, ERT was also successfully used to identify and characterize a hydraulically conductive englacial fracture that intersected two boreholes at a depth of ~ 13 m below the glacier surface. The presence of this connecting void was suggested by drilling records and verified by dual borehole-impulse testing. The reconstructed tomogram for these boreholes is characterized by a background ice-resistivity field of ~109 Ω m that is disrupted at a depth of ~13 m by a sharp, sub-horizontal low-resistivity zone (~10 4 Ω m). Inter-borehole ERT, therefore, has the capacity to image both uniform and fractured temperate glacier ice.

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Application of electrical resistivity tomography (ERT) technique to detect underground cavities in a karst area of South Korea

Environmental Earth Sciences ◽

10.1007/s12665-013-2658-7 ◽

2013 ◽

Vol 71 (6) ◽

pp. 2797-2806 ◽

Cited By ~ 16

Author(s):

Mi Kyung Park ◽

Samgyu Park ◽

Myeong-Jong Yi ◽

Changryol Kim ◽

Jung-Sul Son ◽

...

Keyword(s):

Electrical Resistivity ◽

South Korea ◽

Electrical Resistivity Tomography ◽

Karst Area ◽

Resistivity Tomography ◽

Underground Cavities

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Geophysical study of land subsidence: example from Pokhara basin

Journal of Nepal Geological Society ◽

10.3126/jngs.v34i0.31888 ◽

2006 ◽

Vol 34 ◽

pp. 135-140

Author(s):

M. Yoshida ◽

S. R. Pant ◽

P. C. Adhikary ◽

V. Dangol ◽

S. Shrestha

Keyword(s):

Electrical Resistivity ◽

Debris Flow ◽

Land Subsidence ◽

Ground Penetrating Radar ◽

Electrical Resistivity Tomography ◽

Control Measures ◽

Resistivity Tomography ◽

Geophysical Study ◽

Ground Penetrating

Land subsidence is a serious problem in the Pokhara city and surrounding wide areas consisting of recent debris flow deposits. Owing to their calcareous matrix the debris flow deposits are more-or-less well cemented, even though their age ranges just from 12,000 to 700 years BP. There are numerous caves and caverns in these deposits. To investigate the danger of subsidence, ground penetrating radar and electrical resistivity tomography were employed to detect and map the caves and caverns. The results are quite encouraging and the above methods are found to be quite effective in formulating the control measures to the land subsidence hazard.

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Appraisal on inversion algorithm techniques in 2D electrical resistivity tomography survey data for poised mapping of subsurface features

10.5194/gi-2020-25 ◽

2020 ◽

Author(s):

Abhay Kumar Bharti ◽

Amar Prakash ◽

Krishna Kant Kumar Singh

Keyword(s):

Electrical Resistivity ◽

Electrical Resistivity Tomography ◽

Electrode Spacing ◽

Archaeological Survey ◽

Imaging Data ◽

Inversion Algorithm ◽

Data Set ◽

Resistivity Tomography ◽

Resistivity Imaging ◽

L2 Norm

Abstract. Analysis of non-uniqueness model in resistivity imaging data is vital in inaugurating the consistency of models. Nevertheless, such analysis is moderately unusual in resistivity imaging data set. Electrical resistivity tomography (ERT) technique is being constantly used in many scientific areas including engineering, environmental and archaeological survey. Primarily, the inversion algorithm techniques are employed on synthetic model data set with and without some random Gaussian noise, and its validity is tested by filed data set. The study was conducted in the premises of Central Institute of Mining and Fuel Research (CIMFR), Dhanbad by laying an ERT profile of 480 m length with 5 m electrode spacing using Syscal Pro (Iris instrument) resistivity meter. Two standard arrays were used in this study namely Wenner-Schlumberger and dipole-dipole array. The data set was mixed to a single array to achieve better resolution and enhanced clarification. On processing data by Prosys-II software, it was exported in Res2Dinv software for inversion. In this context, data was inverted by different algorithm techniques i.e. least square (L2-norm) and robust inversion (L1-norm). Exemplary results related to the heterogeneity of the resistivity structure within the high and low resistivity anomaly were obtained by robust inversion method. The obtained results are in broad agreement with the simulation model.

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Identification of subsidence hazard zone by integrating engineering geological mapping and electrical resistivity tomography in Gunung Kidul karst area, Indonesia

Journal of Degraded and Mining Lands Management ◽

10.15243/jdmlm.2022.092.3281 ◽

2022 ◽

Vol 9 (2) ◽

pp. 3281-3291

Author(s):

Wahyu Wilopo ◽

Doni Prakasa Eka Putra ◽

Teuku Faisal Fathani ◽

Slamet Widodo ◽

Galeh Nur Indriatno Putra Pratama ◽

...

Keyword(s):

Electrical Resistivity ◽

Electrical Resistivity Tomography ◽

Geophysical Methods ◽

Research Area ◽

Fracture Pattern ◽

Geological Mapping ◽

Karst Area ◽

Infrastructure Development ◽

Hazard Map ◽

Resistivity Tomography

The presence of natural cavities in karst morphology may cause severe civil engineering and environmental management problems. Karst formations will limit the expansion of urbanization, especially infrastructure development in limestone areas. Geophysical methods, especially electrical resistivity tomography (ERT) techniques, are effective and efficient solutions to detect voids below the surface. This study aimed to develop a subsidence hazard map as basic information for infrastructure development. The identification was made by measuring electrical resistivity tomography on eight profiles in the infrastructure development plan. In addition, it was also supported by geological mapping, particularly the structural geology and types of rocks around the site. The research area consists of massive limestone, bedded limestone, and cavity limestone with generally north-south joints. The analysis of geological mapping data and electrical resistivity tomography measurements showed that the cavity limestone was identified with a north-south elongated pattern in line with the fracture pattern found on the surface at the research area. The surface lithology type, the geological structures density, and the subsurface lithology were used to develop a subsidence hazard map. This information is beneficial in determining the safe location of infrastructure development based on disaster risk mitigation.

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