Integration of electrical resistivity imaging and ground penetrating radar to investigate solution features in the Biscayne Aquifer

Yeboah-Forson, Albert; Comas, Xavier; Whitman, Dean

doi:10.1016/j.jhydrol.2014.04.045

Cited by 18 publications

(8 citation statements)

References 36 publications

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“…A dipole-dipole array, which is utilized in cases where vertical depth penetration and high resolution are paramount, was applied. The dipole-dipole array has been widely used in morphogenetic studies of dolines, collapse dolines and denuded caves (Zhou, Beck and Adams 2002;Stepišnik 2006;Stepišnik and Mihevc 2008;Kaufmann, Deceuster and Quinif 2012;Mihevc and Stepišnik 2012;Yeboah-Forson, Comas and Whitman 2014). The depth penetration of dipole-dipole array is approximately 15% of total spread length of profiles where the roll-along method has not been used (Herman 2001).…”

Section: Methodsmentioning

confidence: 99%

Periodically inundated uvalas and collapse dolines of Upper Pivka, Slovenia

Stepišnik

Gostinčar

2020

AGS

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Within the area of Upper Pivka there is a number of intermittent lakes because of oscillation of water table level close to the surface i.e. shallow karst. Our survey was focused on morphogenetic interpretation of depressions hosting intermittent lakes by means of classic morphographic mapping and sediment analyses that was supported by electrical resistivity tomography. We can interpret at least two different morphogenetic types of depressions. One type are depressions which are periodically inundated uvalas positioned in-between conical hills. The second type are circular depressions within karst plain that are collapse dolines filled with extensive flood deposits up to several metres thick.

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Section: Methodsmentioning

confidence: 99%

Periodically inundated uvalas and collapse dolines of Upper Pivka, Slovenia

Stepišnik

Gostinčar

2020

AGS

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“…A logistic regression model ( 3) is determined for each finite element. The obtained signal X ∈ R m from the electrodes is used to estimate the probability of inclusion P j (Y = 1|X) for j− finite element, 1 ≤ j ≤ k. The reconstruction of the viewing area is defined as a sequence ẑj 1≤j≤k , where for cutting level l ∈ (0, 1).…”

Section: Receiver Operating Characteristic (Roc)mentioning

confidence: 99%

“…Table 1 shows the main advantages and disadvantages of each method. Geophysical methods are used in environmental studies to image objects [1]. They are characterized by their non-invasive character and the possibility of rapid imaging in soil.…”

Section: Introductionmentioning

confidence: 99%

Application of Electrical Tomography Imaging Using Machine Learning Methods for the Monitoring of Flood Embankments Leaks

et al. 2021

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This paper presents an application for the monitoring of leaks in flood embankments by reconstructing images in electrical tomography using logistic regression machine learning methods with elastic net regularisation, PCA and wave preprocessing. The main advantage of this solution is to obtain a more accurate spatial conductivity distribution inside the studied object. The described method assumes a learning system consisting of multiple equations working in parallel, where each equation creates a single point in the output image. This enables the efficient reconstruction of spatial images. The research focused on preparing, developing, and comparing algorithms and models for data analysis and reconstruction using a proprietary electrical tomography solution. A reliable measurement solution with sensors and machine learning methods makes it possible to analyse damage and leaks, leading to effective information and the eventual prevention of risks. The applied methods enable the improved resolution of the reconstructed images and the possibility to obtain them in real-time, which is their distinguishing feature compared to other methods. The use of electrical tomography in combination with specific methods for image reconstruction allows for an accurate spatial assessment of leaks and damage to dikes.

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“…Geophysical methods are widely used in geotechnics and in environmental research. They contain measurement methods and imaging of tested objects (Yeboah-Forson et al, 2014). Research shows how integrated technologies can be used to study complex anisotropic areas.…”

Section: Introductionmentioning

confidence: 99%

Electrical impedance tomography in 3D flood embankments testing – elastic net approach

Rymarczyk

Kozłowski

Kłosowski

2019

Transactions of the Institute of Measurement and Control

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The article presents non-destructive testing based on electrical impedance tomography (EIT) for spatial (3D) monitoring of flood embankments. Therefore, to solve the inverse problem of the EIT, an effective algorithm based on multiple elastic nets has been developed. The originality of the solution is based on the application of many elastic net algorithms as functions, each of which, based on the vector of all measurements, generates the value of a single pixel for the reconstructed image. In this way, the set of elastic nets is equal to the resolution of the image output. Such an approach, although requiring more computing power, yields high resolution images. In addition, the presented algorithms are characterized by high noise immunity and distortion of measurement data. Five different electrode systems were tested in the samples and compared with each other in two measurement variants (stimulations). A reconstruction made on the basis of actual measurements obtained from the physical model was also presented. The presented solution provides a visual analysis of seepages and leaks, which allows for quick and effective intervention and possible prevention of dangers. The research proved that the use of tomographic measurement techniques in combination with the image reconstruction algorithm based on elastic net allows for non-invasive and very accurate spatial assessment of leaks and damages of flood embankments. The received results confirm the effectiveness of the presented research.

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Integration of electrical resistivity imaging and ground penetrating radar to investigate solution features in the Biscayne Aquifer

Cited by 18 publications

References 36 publications

Periodically inundated uvalas and collapse dolines of Upper Pivka, Slovenia

Periodically inundated uvalas and collapse dolines of Upper Pivka, Slovenia

Application of Electrical Tomography Imaging Using Machine Learning Methods for the Monitoring of Flood Embankments Leaks

Electrical impedance tomography in 3D flood embankments testing – elastic net approach

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