Time lapse 3D geoelectric measurements for monitoring of in-situ remediation

Tildy, P.; Neducza, B.; Nagy, Péter; Kanlı, Ali Ismet; Hegymegi, Csaba

doi:10.1016/j.jappgeo.2016.10.037

Cited by 18 publications

(6 citation statements)

References 37 publications

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“…As discussed by several authors (e.g., Rucker ( 2014 ); Tildy et al. ( 2017 )), such parameters should be appropriately determined for each specific field site objectives as well as for each subsurface process that is to be monitored. The spatial parameters on the left part of Fig.…”

Section: Monitoring Subsurface Processes With Time-lapse Electrical R...mentioning

confidence: 99%

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A Review on Applications of Time-Lapse Electrical Resistivity Tomography Over the Last 30 Years : Perspectives for Mining Waste Monitoring

et al. 2022

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Mining operations generate large amounts of wastes which are usually stored into large-scale storage facilities which pose major environmental concerns and must be properly monitored to manage the risk of catastrophic failures and also to control the generation of contaminated mine drainage. In this context, non-invasive monitoring techniques such as time-lapse electrical resistivity tomography (TL-ERT) are promising since they provide large-scale subsurface information that complements surface observations (walkover, aerial photogrammetry or remote sensing) and traditional monitoring tools, which often sample a tiny proportion of the mining waste storage facilities. The purposes of this review are as follows: (i) to understand the current state of research on TL-ERT for various applications; (ii) to create a reference library for future research on TL-ERT and geoelectrical monitoring mining waste; and (iii) to identify promising areas of development and future research needs on this issue according to our experience. This review describes the theoretical basis of geoelectrical monitoring and provides an overview of TL-ERT applications and developments over the last 30 years from a database of over 650 case studies, not limited to mining operations (e.g., landslide, permafrost). In particular, the review focuses on the applications of ERT for mining waste characterization and monitoring and a database of 150 case studies is used to identify promising applications for long-term autonomous geoelectrical monitoring of the geotechnical and geochemical stability of mining wastes. Potential challenges that could emerge from a broader adoption of TL-ERT monitoring for mining wastes are discussed. The review also considers recent advances in instrumentation, data acquisition, processing and interpretation for long-term monitoring and draws future research perspectives and promising avenues which could help improve the design and accuracy of future geoelectric monitoring programs in mining wastes.

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Section: Monitoring Subsurface Processes With Time-lapse Electrical R...mentioning

confidence: 99%

“… 2019 ; Tildy et al. 2017 ) or (ii) track leachate recirculation to enhance waste degradation in landfills (Clément et al. 2010 ; Grellier et al.…”

Section: Review Of Tl-ert Applications Over the Past 30 Yearsmentioning

confidence: 99%

A Review on Applications of Time-Lapse Electrical Resistivity Tomography Over the Last 30 Years : Perspectives for Mining Waste Monitoring

et al. 2022

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“…A presença do oxidante no meio poroso é responsável por forte diminuição da resistividade elétrica da zona saturada. Em razão do contraste de resistividade nos períodos pré e pósinjeção do oxidante, a técnica da tomografia elétrica 4D representa uma viável alternativa para o monitoramento da zona de influência do ISCO, como demonstrado em experimentos laboratoriais (MAO et al, 2015) e em campo (TILDY et al, 2017). Por esta razão, a tomografia elétrica 4D pode representar uma promissora técnica para monitorar o movimento do oxidante injetado dentro da zona, podendo ser empregado como critério para quantificar a eficiência do ISCO.…”

Section: Discussõesunclassified

Simulação geoestatística e numérica para previsão da eficiência da remediação por oxidação química in situ

Teramoto¹,

Pede²,

Chang³

2019

R. Águas Subter.

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A eficiência dos sistemas de remediação, como a oxidação química in situ (ISCO) é fortemente restringida pela presença de heterogeneidades nos valores de permeabilidade. As incertezas relacionadas à presença de heterogeneidades nos aquíferos em relação aos sucessos dos sistemas de remediação podem ser determinadas por intermédio de simulações estocásticas, embora tal metodologia não tenha sido empregada comumente para problemas envolvendo ISCO. Em decorrência deste cenário, foi objetivo deste trabalho desenvolver um procedimento metodológico para prever a eficiência da técnica de remediação por oxidação química in situ a partir do emprego de simulações estocásticas e simulações numéricas de fluxo e transporte. No caso hipotético simulado, foram gerados 30 campos randômicos tridimensionais equiprováveis de condutividade hidráulica e a eficiência da remediação foi testada em todos estes cenários. Os resultados indicam que o sistema de remediação proposto será ineficiente em 100% dos casos, invocando a necessidade de alterações no projeto inicial, tais como número de pontos e tempo de injeção. O elevado grau de incerteza identificado no cenário de contaminação admitido sugere ainda que novas investigações sejam realizadas para redução de incertezas e previsões mais realistas.

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“…Electrical resistivity tomography (ERT) techniques have become important in hydrological and hydrogeological studies, especially for monitoring fluid dynamics within the most superficial layers of the planet, due to the high sensitivity of the data obtained via the application of various inversion schemes. This type of analysis has been used for monitoring over long time periods, to examine the influence of climate and vegetation on root-zone moisture (Jayawickreme et al, 2008), the evolution of leachates and tracers (Kemna et al, 2002;Dahlin et al, 2006Dahlin et al, , 2014, landslide processes (Chambers et al, 2009), earth embankments (Chambers et al, 2008), local seasonal changes (Descloitres et al, 2008), in situ remediations (Tildy et al, 2017), and to characterize watersheds (Miller et al, 2008). Over short time periods, leachate dynamics in landfills and sewage treatment areas (Guérin et al, 2004;Grellier et al, 2005Grellier et al, , 2008Lillo et al, 2009), tracers (Cassiani et al, 2006;Oldenborger et al, 2007), and unsaturated zones (Deiana et al, 2007) have been examined.…”

Section: Introductionmentioning

confidence: 99%

Time-lapse electrical resistivity tomography for assessment of seasonal moisture variations in a tropical regolith

Duarte

Vergara

Pinto-Núñez

et al. 2022

Hydrological Research Letters

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Monitoring and quantifying hydrological flows in the vadose zone is complicated to analyze due to the effects of rainfall in the tropics, the dynamic interactions among rains, the vegetation layer, moisture in the soil, and the entire regolith. Quantifying subsurface hydrological flows at specific scales and high resolution presents further difficulties. To overcome these issues, resistivity methods can play an important role. This paper examines the results of gravimetric moisture content monitoring in the Panamanian tropics through time-lapse electrical resistivity tomography analysis. Changes in the electrical properties of soil were quantified through six tomographic tests performed between February 2012 and March 2013 along with a profile. Significant changes in resistivity were identified between February (dry season) and May, and August and October (rainy season), with negative percentages (-60%) indicating the effects of rain infiltration at the surface and positive percentages (60%) linked to moisture absorption in the soil, electrode relocation for each test or inversion processes. Additional laboratory analyses of soil samples were carried out to obtain gravimetric moisture content tomograms. The changes of this parameter in the subsurface horizons, and the percentage differences in the calculated resistivity values, are helpful for determining the impact of rain on the soils.

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Time lapse 3D geoelectric measurements for monitoring of in-situ remediation

Cited by 18 publications

References 37 publications

A Review on Applications of Time-Lapse Electrical Resistivity Tomography Over the Last 30 Years : Perspectives for Mining Waste Monitoring

A Review on Applications of Time-Lapse Electrical Resistivity Tomography Over the Last 30 Years : Perspectives for Mining Waste Monitoring

Simulação geoestatística e numérica para previsão da eficiência da remediação por oxidação química in situ

Time-lapse electrical resistivity tomography for assessment of seasonal moisture variations in a tropical regolith

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