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Advances in Hydrogeophysical Methods and Their Applications
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Advances in Hydrogeophysical Methods and Their Applications

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Earth Sciences".

Deadline for manuscript submissions: closed (31 October 2021) | Viewed by 12278

Special Issue Editor

Dr. Philippe Leroy

E-Mail Website
Guest Editor
BRGM, French Geological Survey, 3 Avenue C. Guillemin, 45060 Orléans, France
Interests: hydrogeophysics; electrical methods; modeling; interface electrochemistry; zeta potential; colloids; induced polarization; resistivity; self-potential

Special Issue Information

Dear Colleagues,

Geophysical methods are gaining a place of choice in the hydrogeologist toolbox as they provide subsurface data with an unprecedented high spatial and temporal resolution in a non-invasive manner. Geophysical methods are allowing us to investigate complex subsurface environments and to non-intrusively monitor their dynamics, from fluid flow to transport and (bio-)geochemical reactions. Over the last two decades, the field of hydrogeophysics has developed rapidly, shifting from a paradigm of static imaging of structures to dynamic 4D monitoring of subsurface processes. This Special Issue welcomes submissions addressing advances in hydrogeophysics, that is, the acquisition, processing, analysis, and interpretation of data obtained from geophysical methods applied to hydrological studies. Field applications and case studies in hydrogeophysics, biogeophysics, and/or engineering geophysics that demonstrate the successful use of geophysical methods are also welcome.

If you are looking for a journal to publish your work on hydrogeophysics, we have the pleasure to invite you to contribute to the Special Issue “Advances in Hydrogeophysical Methods and Their Applications” in the journal Applied Sciences (IF=2.474, CiteScore™=2.4): https://www.mdpi.com/journal/applsci.

The deadline for submission is 30 June 2021. If you have any question about the SI, do not hesitate to contact us.

Dr. Philippe Leroy
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Laboratory-to-field hydrogeophysical measurements
  • Novel techniques for coupled or joint inversion of geophysical data
  • Improving the link between hydrological and geophysical properties
  • Numerical forward modeling
  • Developing petrophysical relationships

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Published Papers (4 papers)

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Research

18 pages, 15649 KiB  
Article
Laboratory Measurements of Zeta Potential in Fractured Lewisian Gneiss: Implications for the Characterization of Flow in Fractured Crystalline Bedrock
by Jan Vinogradov, Miftah Hidayat, Yogendra Kumar, David Healy and Jean-Christophe Comte
Appl. Sci. 2022, 12(1), 180; https://doi.org/10.3390/app12010180 - 24 Dec 2021
Cited by 7 | Viewed by 2795
Abstract
Despite the broad range of interest and possible applications, the controls on the electric surface charge and the zeta potential of gneiss at conditions relevant to naturally fractured systems remain unreported. There are no published zeta potential measurements conducted in such systems at [...] Read more.
Despite the broad range of interest and possible applications, the controls on the electric surface charge and the zeta potential of gneiss at conditions relevant to naturally fractured systems remain unreported. There are no published zeta potential measurements conducted in such systems at equilibrium, hence, the effects of composition, concentration and pressure remain unknown. This study reports zeta potential values for the first time measured in a fractured Lewisian gneiss sample saturated with NaCl solutions of various concentrations, artificial seawater and artificial groundwater solutions under equilibrium conditions at confining pressures of 4 MPa and 7 MPa. The constituent minerals of the sample were identified using X-ray diffraction and linked to the concentration and composition dependence of the zeta potential. The results reported in this study demonstrate that the zeta potential remained negative for all tested solutions and concentrations. However, the values of the zeta potential of our Lewisian gneiss sample were found to be unique and dissimilar to pure minerals such as quartz, calcite, mica or feldspar. Moreover, the measured zeta potentials were smaller in magnitude in the experiments with artificial complex solutions compared with those measured with NaCl, thus suggesting that divalent ions (Ca2+, Mg2+ and SO42−) acted as potential determining ions. The zeta potential was also found to be independent of salinity in the NaCl experiments, which is unusual for most reported data. We also investigated the impact of fracture aperture on the electrokinetic response and found that surface electrical conductivity remained negligibly small across the range of the tested confining pressures. Our novel results are an essential first step for interpreting field self-potential (SP) signals and facilitate a way forward for characterization of water flow through fractured basement aquifers. Full article
(This article belongs to the Special Issue Advances in Hydrogeophysical Methods and Their Applications)
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15 pages, 5148 KiB  
Article
Three-Component Microseismic Data Denoising Based on Re-Constrain Variational Mode Decomposition
by Zhili Chen, Peng Wang, Zhixian Gui and Qinghui Mao
Appl. Sci. 2021, 11(22), 10943; https://doi.org/10.3390/app112210943 - 19 Nov 2021
Cited by 8 | Viewed by 1885
Abstract
Microseismic monitoring is an important technology used to evaluate hydraulic fracturing, and denoising is a crucial processing step. Analyses of the characteristics of acquired three-component microseismic data have indicated that the vertical component has a higher signal-to-noise ratio (SNR) than the two horizontal [...] Read more.
Microseismic monitoring is an important technology used to evaluate hydraulic fracturing, and denoising is a crucial processing step. Analyses of the characteristics of acquired three-component microseismic data have indicated that the vertical component has a higher signal-to-noise ratio (SNR) than the two horizontal components. Therefore, we propose a new denoising method for three-component microseismic data using re-constrain variational mode decomposition (VMD). In this method, it is assumed that there is a linear relationship between the modes with the same center frequency among the VMD results of the three-component data. Then, the decomposition result of the vertical component is used as a constraint to the whole denoising effect of the three-component data. On the basis of VMD, we add a constraint condition to form the re-constrain VMD, and deduce the corresponding solution process. According to the synthesis data analysis, the proposed method can not only improve the SNR level of three-component records, it also improves the accuracy of polarization analysis. The proposed method also achieved a satisfactory effect for field data. Full article
(This article belongs to the Special Issue Advances in Hydrogeophysical Methods and Their Applications)
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18 pages, 510 KiB  
Article
Predicting Electrokinetic Coupling and Electrical Conductivity in Fractured Media Using a Fractal Distribution of Tortuous Capillary Fractures
by Luong Duy Thanh, Damien Jougnot, Phan Van Do, Dang Thi Minh Hue, Tran Thi Chung Thuy and Vu Phi Tuyen
Appl. Sci. 2021, 11(11), 5121; https://doi.org/10.3390/app11115121 - 31 May 2021
Cited by 8 | Viewed by 2689
Abstract
Electrokinetics methods have attracted increasing interest to characterize hydrogeological processes in geological media, especially in complex hydrosystems such as fractured formations. In this work, we conceptualize fractured media as a bunch of parallel capillary fractures following the fractal size distribution. This conceptualization permits [...] Read more.
Electrokinetics methods have attracted increasing interest to characterize hydrogeological processes in geological media, especially in complex hydrosystems such as fractured formations. In this work, we conceptualize fractured media as a bunch of parallel capillary fractures following the fractal size distribution. This conceptualization permits to obtain analytical models for both the electrical conductivity and the electrokinetic coupling in water saturated fractured media. We explore two different approaches to express the electrokinetic coupling. First, we express the streaming potential coupling coefficient as a function of the zeta potential and then we obtain the effective charge density in terms of macroscopic hydraulic and electrokinetic parameters of porous media. We show that when the surface electrical conductivity is negligible, the proposed models reduces to the previously proposed one based on a bundle of cylindrical capillaries. This model opens up a wide range of applications to monitor the water flow in fractured media. Full article
(This article belongs to the Special Issue Advances in Hydrogeophysical Methods and Their Applications)
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28 pages, 8218 KiB  
Article
True 2-D Resistivity Imaging from Vertical Electrical Soundings to Support More Sustainable Rural Water Supply Borehole Siting in Malawi
by Romain Leborgne, Michael O. Rivett, Gift J. Wanangwa, Philippe Sentenac and Robert M. Kalin
Appl. Sci. 2021, 11(3), 1162; https://doi.org/10.3390/app11031162 - 27 Jan 2021
Cited by 8 | Viewed by 3898
Abstract
To improve borehole siting for rural water supply, an advanced resistivity method was adapted for developing country use and demonstrated in Malawi. The method was designed to be low cost, developing-country accessible, efficient. It allows single or multiple operators to acquire the multiple [...] Read more.
To improve borehole siting for rural water supply, an advanced resistivity method was adapted for developing country use and demonstrated in Malawi. The method was designed to be low cost, developing-country accessible, efficient. It allows single or multiple operators to acquire the multiple vertical electrical soundings (VESs) required that are inverted together in 2-D, to give a true cross-section of subsurface resistivity. Application at four sites generated true cross-sections of subsurface resistivity to around 100 m depth relevant to groundwater-resource investigation. A wide range of (hydro)geological features was identified, including fractured/weathered basement, gneiss domes, well-developed fault zones and several types of deltaic deposits. Imaging performance appears comparable to that of 2-D surface ERT (electrical resistivity tomography) that uses more expensive equipment, often unaffordable in developing countries. Based on the subsurface configurations determined and hydrogeological conceptualisation subsequently undertaken, the local aquifer potential could be evaluated, thereby providing a decision-making basis for future borehole siting at the sites surveyed. The technology is far superior to conventional 1-D VES, electromagnetic profiling or magnetic profiling currently used for borehole siting in Malawi. Technology adoption currently under consideration nationally would make use of existing VES capacity and permit much improved targeting of aquifer resource, more sustainable siting of boreholes and greater future resilience of Malawi’s rural water-supply infrastructure. Full article
(This article belongs to the Special Issue Advances in Hydrogeophysical Methods and Their Applications)
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