Investigation of Gürbulak Landslide Using 2D Electrical Resistivity Image Profiling Method (Trabzon, Northeastern Turkey)

Yılmaz, Sedat

doi:10.2113/jeeg12.2.199

Cited by 22 publications

(8 citation statements)

References 22 publications

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“…Furthermore, we employed the Zonge Inversion for Interative 2DIP software for the inverse modelling of the apparent resistivity data. This software employs the finite element method to compute forward and inverse 2D resistivity models of the earth (Wannamaker, 1992) and its inversion routine uses damped leastsquares inversion (Yilmaz, 2007).…”

Section: Electroresistivitymentioning

confidence: 99%

Analysis of the risk of karst collapse in Lapão, Bahia, Brazil

Santos

Silva

Sampaio

2012

Exploration Geophysics

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On October 2008, the large extent of dissolution of limestone in the Irecê Basin resulted in the occurrence of minor ground shakes and the enhancement of fractures along the surface of the ground and on the walls of buildings in the urban and periurban area of the city of Lapão. After preliminary geological and geotechnical studies to analyse the danger of collapse of underground caves, we have carried out gravity and electro-resistivity profiles in order to map the concealed caves and to help the determination of the level of groundwater within them. The interpretation of the results provided useful information both for the immediate safety of the population and for subsequent hydrological and geotechnical work. We have defined five risk areas based on the variations of the Bouguer and of the electrical resistivity data, by correlating the distribution of gravity lows with the presence of caves and the less resistive zones with the presence of brine water underground. (a) ( b) Fig. 1. (a) Cracks along a downtown street of the city of Lapão. (b) Fractures in a plantation of onions.

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Section: Electroresistivitymentioning

confidence: 99%

Analysis of the risk of karst collapse in Lapão, Bahia, Brazil

Santos

Silva

Sampaio

2012

Exploration Geophysics

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“…This physical property of the ground is mainly influenced by the mineralogy of the particles, porosity, ground water content, water salinity and the intrinsic weathering/alteration of the material (Reynolds, 2011;Archie, 2003;Park and Kim, 2005;Bièvre et al, 2012). Since some of these factors, especially the change of water content and weathering/alteration degree, are well-known rulers in the triggering mechanisms of gravitational mass movement (Gabet, 2007;Matsuura et al, 2008;Schulz et al, 2009;Sajinkumar et al, 2011;Regmi et al, 2013), the ERT technique has been widely applied for landslide characterization and monitoring studies (McCann and Forster, 1990;Hack, 2000;Jongmans and Garambois, 2007;Yilmaz, 2007;Perrone et al, 2014;Heinze et al, 2017;Boyd et al, 2019). However, direct current (DC) measurements (as ERT) can suffer from a range of sources of error that, if not correctly addressed, can have a significant impact on the interpretation of the survey results (Binley, 2015).…”

Section: Introductionmentioning

confidence: 99%

Improving the galvanic contact resistance for geoelectrical measurements in debris areas: A case study

Pavoni

Carrera

Boaga

2022

Near Surface Geophysics

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This paper aims to test, in a quantitative way, the different approaches that can be applied to improve the contact resistance problem in a debris environment for the acquisition of electrical resistivity tomography. We collected various datasets on the same investigation line in a blocky ground surface of a landslide deposit, using different coupling systems: single electrodes placed between the boulders, adding extra electrodes in parallel and drilled single electrodes inside the blocks. We performed the measurements in natural dry conditions, then we added salt water nearby the electrodes hammered among the boulders and we filled the drilled holes with a conductive carbomer‐based gel. The results clearly demonstrate that using salt water significantly reduces the contact resistances, but also that, if salt water is not available, we can collect a good quality dataset in dry conditions by connecting more electrodes in parallel. Drilling the electrodes directly inside the boulders decreases the data quality but, if necessary, we demonstrate that the use of a commercial carbon polymer gel can provide a marked improvement in contact resistances.

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“…This can cause errors in the parameter interpretation. This problem can be significantly reduced by using the Joint Inversion methods [17], [18], [20] which are then perfected by providing a lateral constraint [21], [22], but the results are still not optimal. One alternative solution to overcome the above problem is to optimize the damping factor on the least-squares smoothness-constrain inversion method.…”

Section: Introductionmentioning

confidence: 99%

Optimize of Least-Square Inverse Constrain Method of Geoelectrical Resistivity Wenner-Schlumberger for Investigation Rock Structures in Malalak Districts of Agam West Sumatra

Akmam¹,

Amir;²,

Putra³

2019

Preprint

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Numerous studies have been conducted on an inversion method, focus on constraining factor,singuler value, speed of convergence. However, the result of inversion is not unique and bivalent. In this research, we optimize of Least-Square constrain by using damping factor. Th is method used for interpretation of the volumes and rock structure in Malalak Distric of Agam West Sumatra. This is undertaken because Malalak districts of Agam West Sumatra that passed by highway Padang and Bukittingi is a frequent area of landslide. Furthermore, the frequency of the landslide depends on the type of rock and the angle of the slope . The depth of the slide surface can be predicted by using the least squares inversion constrain method of Geoelectric Resistivity. Landslides resulted in disruption of transportation between the city of Padang and another district in Sumatra. Based on the above, to determine the rock's structure, the depth and tilt angle of the slide surface in Malalak districts Agam West Sumatra has to take place. Data obtained through Geoelectrical exploration using with automatic resistivitymeter equipment. Constrains were obtained using the Marquat inversion method. The result of the research is first, the damping factor for structures which have wide range resistivity is 0.02 and the smallest damping factor is 0.015. Second, the rock structure in Malalak of Agam consists of clay, sandstone, andesite, and limestone and dolomite. Implementation this research can be used to develop mitigation of landslide deserter.

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Investigation of Gürbulak Landslide Using 2D Electrical Resistivity Image Profiling Method (Trabzon, Northeastern Turkey)

Cited by 22 publications

References 22 publications

Analysis of the risk of karst collapse in Lapão, Bahia, Brazil

Analysis of the risk of karst collapse in Lapão, Bahia, Brazil

Improving the galvanic contact resistance for geoelectrical measurements in debris areas: A case study

Optimize of Least-Square Inverse Constrain Method of Geoelectrical Resistivity Wenner-Schlumberger for Investigation Rock Structures in Malalak Districts of Agam West Sumatra

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