Electrical resistivity of saturated and unsaturated sediments in northeastern Canada

Lévesque, Yan; Walter, Julien; Chesnaux, Romain; Dugas, Sebastien; Noel, D.

doi:10.1007/s12665-023-10998-w

Cited by 4 publications

(2 citation statements)

References 59 publications

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“…Abrupt variations in electrical properties are generally associated with the boundary between saturated and unsaturated sediments, thereby identifying the water table. These charts link the sedimentary facies, i.e., clay, tills, sand, sand and gravel, and gravels, the associated electrical resistivity, and the water content (Reynolds 1987(Reynolds , 2011Neal and Roberts 2000;Neal 2004;Lévesque et al 2023). Lévesque et al (2022) also demonstrated that although overlap of the electrical resistivity exists in the distributions between sediment classes, saturated and unsaturated sediment overlaps minimally for a given sediment class.…”

Section: Available Approaches To Constrain a Numerical Flow Model Wit...mentioning

confidence: 99%

Using geophysical data to assess groundwater levels and the accuracy of a regional numerical flow model

2023

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The use of geophysical data to accurately determine water levels is demonstrated for an aquifer within the Saint-Narcisse moraine in the Mauricie region of southeastern Québec, Canada. Two numerical simulations were conducted using FEFLOW, one based on regional piezometric data and the other using geophysical data; the data were acquired through transient electromagnetic (TEM), electrical resistivity (ERT), and ground-penetrating radar (GPR) surveys. The threedimensional geological and groundwater flow model was based on data from 94 boreholes, 5 stratigraphic cross-sections, and 20 TEM, 6 ERT (~1.44 km) and 4 GPR (~0.97 km) surveys. Both numerical analyses confirmed the simulated water levels, and the root mean square errors obtained from the piezometric data and the multiple geophysical techniques were similar at 3.81 m and 2.76 m, respectively. Through a discrete modeling approach, this study shows that groundwater levels estimated using geophysical tools and methods and those determined by direct observation are comparable. The outcome illustrates how geophysical data can complement direct observations to provide additional hydraulic information to hydrologic modellers. Geophysical surveys provide an extensive set of soft data that can be leveraged to improve groundwater flow models and determine groundwater levels, particularly in areas characterized by limited direct piezometric information.

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Section: Available Approaches To Constrain a Numerical Flow Model Wit...mentioning

confidence: 99%

Using geophysical data to assess groundwater levels and the accuracy of a regional numerical flow model

2023

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“…As one of the physical property indicators of soil, resistivity can reflect the structure and engineering characteristics of soil to a certain extent [1,[3][4][5] and is influenced by many factors, such as water content, soil structure, pore solution properties, and environmental temperature [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Electrical Resistivity Characteristics of Uniformly Graded Calcareous Sand

Hou,

Han,

et al. 2023

Applied Sciences

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The resistivity of calcareous sand is one of its inherent physical characteristic parameters, and the study of the resistivity characteristics of calcareous sand is of great significance in the subsequent study of the relationship between the resistivity of calcareous sand under different loads and its mechanical properties. This study uses alternating current (AC) electrical resistance testing equipment based on the two-electrode method to study the effects of pore water, temperature, relative density, saturation, and other factors on the resistivity of calcareous sand. We used the experimental results to analyze in detail the effects of various influencing factors on the resistivity of calcareous sand and established a relationship between them. Research has shown that as the temperature increases, the conductivity of the medium in the solution increases and the resistivity decreases. The resistivity of the calcareous sand of the three size fractions decreases with increasing saturation, and the relationship between them is a power function. The resistivity of saturated calcareous sand with three size fractions increases with increasing density, and the two show a good linear relationship. The results of this research can provide support for the study of the relationship between the resistivity and mechanical properties of calcareous sand under different loads.

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Use of remote sensing, spatial and geophysical modeling, and real recharging capabilities to identify suitable areas for groundwater exploitation in dry coastal areas

Elewa,

Nosair,

Ibrahim

et al. 2024

Journal of Environmental Management

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Electrical resistivity of saturated and unsaturated sediments in northeastern Canada

Cited by 4 publications

References 59 publications

Using geophysical data to assess groundwater levels and the accuracy of a regional numerical flow model

Using geophysical data to assess groundwater levels and the accuracy of a regional numerical flow model

Experimental Study on the Electrical Resistivity Characteristics of Uniformly Graded Calcareous Sand

Use of remote sensing, spatial and geophysical modeling, and real recharging capabilities to identify suitable areas for groundwater exploitation in dry coastal areas

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