Estimation of soil petrophysical parameters from resistivity data: Application to oil-contaminated site characterization

Shevnin, Vladimir; Delgado‐Rodríguez, Omar; Mousatov, Aleksandr; Hernández, David Flores; Martínez, Héctor Zegarra; Ryjov, Albert

doi:10.22201/igeof.00167169p.2006.45.3.204

Cited by 28 publications

(7 citation statements)

References 23 publications

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“…Hydrocarbons are among the main factors of geological medium contamination. The effectiveness of electrical methods for the characterization, on surface and depth, of oil contaminated plumes has been reported by several authors (Vanhala, 1997;Modin et al, 1997;Atekwana et al, 2001;Osella et al, 2002;Delgado-Rodríguez et al, 2006;2006a). Just after contamination, a high resistivity anomaly delimits the contaminated zone.…”

Section: Introductionmentioning

confidence: 83%

“…Fischer et al (1996) studied a gasolinecontaminated site and they considered that VOC = 21 ± 2 ppm correspond to low contamination levels. Based on our experience (Ochoa et al, 2002;Delgado-Rodríguez et al, 2006, Mendez-Velarde et al, 2012, we had determined that in hydrocarbons contaminated sites VOC values greater than 20 ppm are associated with presence of hydrocarbons, either as free product, absorbed in the subsurface or dissolved in groundwater.…”

Section: Voc Data Interpretationmentioning

confidence: 98%

“…Once groundwater (or salinity) and soil resistivity are known, clay content and porosity are estimated for clean soil, and the geoelectric boundary is defined. The characteristics of the conductivity model, the procedure to determine the groundwater (from in-field measurements) and soil (from lab measurements) resistivity, and the equations for calculate the soil petrophysical parameters (including clay content and porosity) are explained in detail in Shevnin et al (2006; and Delgado-Rodríguez et al (2012).…”

Section: Ert Data Interpretation Defining the Geoelectric Boundary Be...mentioning

confidence: 99%

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Joint interpretation of geoelectrical and volatile organic compounds data: a case study in a hydrocarbons contaminated urban site

Delgado‐Rodríguez

Flores-Hernández

Amezcua‐Allieri

et al. 2014

Geofísica Internacional

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As a result of a gasoline spill in an urban area, Electrical Resistivity Tomography (ERT), Electromagnetic Profiling (EMP) and Volatile Organic Compounds (VOC) methods were used in order to define the contamination plume and to optimize the drilling and soil sampling activities. The VOC anomalies (recent contamination) indicated that a gas station located at the study site is an active contamination source. The mature contaminated zones defined by ERT and EMP methods corresponded with low resistivity anomalies due to degradation process of the hydrocarbons contaminants. The ERT, EMP and VOC results were integrated on a map, allowing the final configuration of contamination plumes and the optimization of drilling and soil/freeproduct sampling. Laboratory analyses of free-product samples suggest the existence of more than one contamination event in the site, with the presence of recent and degraded-hydrocarbon contaminants classified in the gasoline range. This study shows the advantages of joint application of ERT, EMP and VOC methods in sites with active contamination source, where the existence of recent and mature contaminants in subsoil is assumed.

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Section: Introductionmentioning

confidence: 83%

Section: Voc Data Interpretationmentioning

confidence: 98%

Section: Ert Data Interpretation Defining the Geoelectric Boundary Be...mentioning

confidence: 99%

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Joint interpretation of geoelectrical and volatile organic compounds data: a case study in a hydrocarbons contaminated urban site

Delgado‐Rodríguez

Flores-Hernández

Amezcua‐Allieri

et al. 2014

Geofísica Internacional

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“…Group B is dominated by soils with high proportions of fine grain (>54%) and high moisture content (>43%) (Figures 6 and 7). Resistivity values of the samples clustered in group B are in the narrow range from 0.9 Ω m to 5.9 Ω m, which is the typical range for clay soil (Giao et al, 2003;Shevnin et al, 2006).…”

Section: Cluster Analysismentioning

confidence: 95%

Soil resistivity measurements to evaluate subsoil salinity in rice production systems in the Vietnam Mekong Delta

Nguyen,

Germer,

Duong

et al. 2023

Near Surface Geophysics

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Rice is a staple crop in the Vietnam Mekong Delta (VMD) in which more than half of Vietnam's rice is produced. However, rice production in the VMD is threatened by increasing saltwater intrusion due to land subsidence and climate change induced sea level rise. Saltwater intrusion into lowland areas through the canal system or capillary rise of saline water from near surface saline water tables may result in salt accumulation in the topsoil. Therefore, it is important to disentangle the two effects and their relative importance to implement appropriate strategies for water and salinity management for adapting rice production systems of the VMD to climate change. Here, we report on the possibility of using geoelectrical methods to evaluate the potential threat of subsoil salinity to rice production. To evaluate the level of subsoil salinity, we measured soil electrical resistivity using an ARES II to a depth of 40 m in a case study comprising five locations in the VMD. Electrical resistivity measurements were calibrated to soil types, which were identified through evaluating 1 m core sections obtained by drilling down to 40 m depth. The relationship between drilling data and soil resistivity was determined by applying clustering and principal component analysis. Resistivity values smaller than 3 Ω m were clearly identified as indicative for a saline water table. The results show a direct link between the depth of the saline water table and the proximity to the sea, but not to the rice production system (single, double, or triple cropping). This study proved for the first time the applicability of the electrical resistivity tomography method for identifying groundwater tables and evaluating subsoil salinity on an agricultural field scale in the VMD.

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“…The field geophysical survey was conducted using the Geotrone electrical resistivity (ER) meter model G41 to measure the subsurface resistivity in the vertical electrical resistivity sounding using the Wenner array configuration [31]. During the investigation, the assumption was that geological sections are mainly horizontally layered (consisting of different geological layers) or pseudo-layered structures due to the influence of groundwater level and weathering [32]. This configuration was adopted due to its strongest signal strength, and greater sensitivity to vertical resistivity variation or structures lying horizontally concerning the rocks [31,33].…”

Section: Electrical Resistivity-sounding Data Acquisitionmentioning

confidence: 99%

Application of Aquifer Delineation and Hydrogeophysical Techniques in Estimating Groundwater Recharge to Enhance Water Allocation in Groundwater-Dependent Areas, Northern Cape, South Africa

Baloyi,

Kanyerere,

Muchingami

et al. 2024

Preprint

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The aquifer delineation using a hydrogeophysical survey was carried out in De Aar, a small town in the eastern part of the Karoo supergroup, Northern Cape, South Africa. In this re-gion, the current approach for estimating recharge, water allocation plans, and water monitoring does not consider the existence of different types of aquifers. Instead, it assumes there is one aquifer system and therefore the area might have one value of recharge. This study aimed to delineate aquifers into unconfined and confined aquifers for estimating recharge and demonstrate the use of geophysics techniques in delineating aquifer systems. Six VES stations and seven profile lines were measured using a Wenner array configuration and ground magnetotelluric method, respectively. VES data was processed using IPI2win software while electric potential difference curve was in-terpreted together with lithological data. Four significant layers of low (0.9-8.1 Ωm), moderate (22.4-125 Ωm), and high 68-177 Ωm) resistivity values were delineated suggestive of the different lithological formations. The subsurface profile mapping using ground magentotelluric methods did not suggest groundwater accumulations below 50 m, instead supported shallow groundwater potentials boreholes. These results have provided a double layer aquifer system thereby suggesting that recharge estimation need to be carried out in two different aquifer systems to enhance water allocation plans, and water monitoring in groundwater-dependent areas similar to prevailing conditions in the current study area.

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Estimation of soil petrophysical parameters from resistivity data: Application to oil-contaminated site characterization

Cited by 28 publications

References 23 publications

Joint interpretation of geoelectrical and volatile organic compounds data: a case study in a hydrocarbons contaminated urban site

Joint interpretation of geoelectrical and volatile organic compounds data: a case study in a hydrocarbons contaminated urban site

Soil resistivity measurements to evaluate subsoil salinity in rice production systems in the Vietnam Mekong Delta

Application of Aquifer Delineation and Hydrogeophysical Techniques in Estimating Groundwater Recharge to Enhance Water Allocation in Groundwater-Dependent Areas, Northern Cape, South Africa

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