The use of FDEM in hydrogeophysics: A review

Boaga, Jacopo

doi:10.1016/j.jappgeo.2017.02.011

Cited by 54 publications

(41 citation statements)

References 106 publications

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“…While this is not yet common practice for soil moisture monitoring, some notable applications already exist, e.g., [91]. A recent review of EMI methods for hydrological and environmental applications is given by Boaga [92].…”

Section: Electromagnetic Induction (Emi)mentioning

confidence: 99%

Local- and Plot-Scale Measurements of Soil Moisture: Time and Spatially Resolved Field Techniques in Plain, Hill and Mountain Sites

Raffelli

Previati

Canone

et al. 2017

Water

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Soil moisture measurement is essential to validate hydrological models and satellite data. In this work we provide an overview of different local and plot scale soil moisture measurement techniques applied in three different conditions in terms of altitude, land use, and soil type, namely a plain, a mountain meadow and a hilly vineyard. The main goal is to provide a synoptic view of techniques supported by practical case studies to show that in such different conditions it is possible to estimate a time and spatially resolved soil moisture by the same combination of instruments: contact-based methods (i.e., Time Domain Reflectometry-TDR, and two low frequency probes) for the time resolved, and hydro-geophysical minimally-invasive methods (i.e., Electromagnetic Induction-EMI, Ground Penetrating Radar-GPR, and the Electrical Resistivity Tomography-ERT) for the spatially resolved. Both long-term soil moisture measurements and spatially resolved measurement campaigns are discussed. Technical and operational measures are detailed to allow critical factors to be identified.

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Section: Electromagnetic Induction (Emi)mentioning

confidence: 99%

Local- and Plot-Scale Measurements of Soil Moisture: Time and Spatially Resolved Field Techniques in Plain, Hill and Mountain Sites

Raffelli

Previati

Canone

et al. 2017

Water

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“…As shown in Figure 6, the surrounding rock of the chamber is divided into multiple Voronoi polygons. In each Voronoi polygon, triangular finite elements are used for filling the polygon, while cohesive four-node joint elements are inserted between the Voronoi elements [19]. The stress of continuous medium is approximated using the finite element method before the material is damaged.…”

Section: Basic Principle Of the Fdemmentioning

confidence: 99%

Deformation and failure mechanism of full seam chamber with extra-large section and its control technology

et al. 2020

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In order to effectively predict and control the rib spalling and roof leakage, it is necessary to reveal the deformation and failure mechanism of the chamber and propose the corresponding surrounding rock control technology. Based on uniaxial compression experiments and numerical simulations, it is concluded that coal body damage is dominated by shear failure during uniaxial compression, which indicates to some extent the main form of damage of the surrounding rock in the chamber. Then the combined finite and discrete element method is used to establish a numerical model to reveal the evolution law of fracture in the surrounding rock. The simulation results show that after the excavation of the chamber, a large amount of shear failure occurred in the ribs and the roof. Then those cracks further developed, expanded, penetrated, and finally connected with the surface of the chamber. Under the effect of the mine pressure, the coal body is separated from the surface of the chamber, leading to the occurrence of rib spalling and roof leakage. So it was given that support method by controlling crack development. The grouting and high-strength anchor bolt and anchor cable are proposed to improve the shear strength of the surrounding rock, which helps to reduce the occurrence of cracks, and inhibit the cracks from interpenetrating. An industrial test was carried out in the chamber of Tashan Coal Mine, which showed good control effect of the surrounding rock in the chamber.

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“…In recent years FD-EMI instruments have been increasingly used in hydrological investigations due to their improved reliability and stability (Boaga, 2017). Furthermore, FD-EMI methods have the advantage over ERI in that they do not require contact with the ground and can therefore be more productive.…”

Section: Multi-coil Electromagnetic Inductionmentioning

confidence: 99%

“…Gooseff, 2010). The HZ is therefore not ubiquitous, as is commonly assumed and is often limited to narrow zones (Hester et al, 2013;2017). The physical dimensions of the hyporheic zone are also difficult to define, however, the majority of HZ studies focus on lateral scales of 1-10 m and vertical scales of <1 m (Ward, 2016).…”

Section: Introductionmentioning

confidence: 99%

Geophysical characterisation of the groundwater–surface water interface

McLachlan

Chambers

Uhlemann

et al. 2017

Advances in Water Resources

109

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Interactions between groundwater (GW) and surface water (SW) have important implications for water quantity, water quality, and ecological health. The subsurface region proximal to SW bodies, the GW-SW interface, is crucial as it actively regulates the transfer of nutrients, contaminants, and water between GW systems and SW environments. However, geological, hydrological, and biogeochemical heterogeneity in the GW-SW interface makes it difficult to characterise with direct observations. Over the past two decades geophysics has been increasingly used to characterise spatial and temporal variability throughout the GW-SW interface. Geophysics is a powerful tool in evaluating structural heterogeneity, revealing zones of GW discharge, and monitoring hydrological processes. Geophysics should be used alongside traditional hydrological and biogeochemical methods to provide additional information about the subsurface. Further integration of commonly used geophysical techniques, and adoption of emerging techniques, has the potential to improve understanding of the properties and processes of the GW-SW interface, and ultimately the implications for water quality and environmental health.

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The use of FDEM in hydrogeophysics: A review

Cited by 54 publications

References 106 publications

Local- and Plot-Scale Measurements of Soil Moisture: Time and Spatially Resolved Field Techniques in Plain, Hill and Mountain Sites

Local- and Plot-Scale Measurements of Soil Moisture: Time and Spatially Resolved Field Techniques in Plain, Hill and Mountain Sites

Deformation and failure mechanism of full seam chamber with extra-large section and its control technology

Geophysical characterisation of the groundwater–surface water interface

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