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Non-invasive geophysical methods for monitoring the shallow aquifer based on time-lapse electrical resistivity tomography, magnetic resonance sounding, and spontaneous potential methods. [PDF]
Sci RepLi K +10 more
europepmc +1 more source
Open Agriculture, 2018 Abstract Soil compaction is a serious problem, which is aggravated due to its difficulty to locate and reverse. Electrical resistivity tomography (ERT) is a non-invasive geophysical method that can be used to identify compacted areas, soil horizon thickness and assess soil physical properties. This study assesses the relationship between
Tomáš de Figueiredo, Arlindo Almeida
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A new approach to quantify the reliability of Electrical Resistivity Tomography (ERT) images
2023Anthropogenic and natural hazards assessments need a good knowledge of the structures. A classical approach based on geological observations or soil mechanics investigations is often insufficient to characterize both the structures and the nature of subsurface materials.
Gautier, Maxime +2 more
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Interrogation of a precipitation reaction by electrical resistance tomography (ERT)
AIChE Journal, 2005AbstractElectrical resistance tomography (ERT) provides a noninvasive and nonintrusive technique for the full 3‐D interrogation of a typical stirred vessel reactor up to a spatial discrimination of approximately 2,500 derived data points. Some recent ERT results are presented for a newly refurbished 8 ring 16‐sensor 2.3 m3 pilot scale vessel, detecting
S. J. Stanley, R. Mann, K. Primrose
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Electrical Resistance Tomography (ERT) applications to Chemical Engineering
Chemical Engineering Research and Design, 2013Abstract Electrical Resistance Tomography (ERT) has the capability of offering time-evolving multidimensional comprehensive process knowledge, enrichment of fundamental process understanding and enhancement of the design and operation of process equipment by measuring the conductivity distribution within a process-plant of interest.
Mohadeseh Sharifi, Brent Young
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Electrical resistance tomography(ERT) by using an ECT sensor
2010 IEEE International Conference on Imaging Systems and Techniques, 2010A sensor typically used in electrical capacitance tomography (ECT) was generalized to reconstruct the conductivity distribution in this paper. Analytical model was established for the sensor. As a result, the sensitivity matrix and the electric field lines can be obtained directly by using the formulae, which are fast and simple.
Zhang Cao +3 more
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Dynamic performance improvement of ERT system [electrical resistance tomography]
Proceedings of the 21st IEEE Instrumentation and Measurement Technology Conference (IEEE Cat. No.04CH37510), 2004Electrical resistance tomography (ERT) is the embranchment of process tomography (PT). In this paper, the bottleneck of system real-time performance is analysed. The dynamic performance of the system can be improved by increasing the signal frequency, placing the band pass filter (BPF) parallel and replacing the low pass filter (LPF) used to obtain the
null Wang Wenhui +3 more
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Improved characterisation and modelling of measurement errors in electrical resistivity tomography (ERT) surveys [PDF]
Journal of Applied Geophysics, 2017 Measurement errors can play a pivotal role in geophysical inversion. Most inverse models require users to prescribe or assume a statistical model of data errors before inversion. Wrongly prescribed errors can lead to over- or under-fitting of data; however, the derivation of models of data errors is often neglected.
Paul Wilkinson +2 more
exaly +5 more sources
4D electrical resistivity tomography (ERT) for aquifer thermal energy storage monitoring [PDF]
Geothermics, 2019 Abstract In the context of aquifer thermal energy storage, we conducted a hydrogeophysical experiment emulating the functioning of a groundwater heat pump for heat storage into an aquifer. This experiment allowed the assessment of surface electrical resistivity tomography (ERT) ability to monitor the 3D development over time of the aquifer thermally ...
Thomas Hermans +2 more
exaly +5 more sources
Electric Resistivity Tomography (ERT) Measurements in Area of an Old Salt Mine
Proceedings, 2013A large number of old salt exploitations are presently abandoned in Romania as a consequence of mine flooding, determining in many cases active subsidence and collapse. The geophysical study carried out in 2012 at Ocna Dej salt mine had as main objective the detailed illustration by means of ERT and VES resistivity data the actual extent of underground
F. Chitea +3 more
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