Principles of electrography applied to self‐potential electrokinetic sources and hydrogeological applications

Revil, A.; Naudet, V.; Nouzaret, J.; Pessel, Marc

doi:10.1029/2001wr000916

Cited by 171 publications

(170 citation statements)

References 46 publications

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“…There are electromagnetic fields accompanying a seismic body and surface waves limited to the neighborhood of the seismic wave. The electromagnetic disturbances generated at the material interface can diffusive very fast, comparable to electromagnetic wave speed [17,47,48]. Revil and Jardani extended the theory by assuming elasticoviscous rheology of the generalized Maxwell type [15,16].…”

Section: Non-newtonian Effectsmentioning

confidence: 99%

“…And where K 0 , K 1 , and K 2 , are the bulk moduli of the rock matrix, dry porous rock, and pore water, respectively, m is the porosity, and e is the volume strain [34,47,48]. We treat a two-dimensional problem with the wave propagating vectorn = (sin θ, cos θ) situated in the x-z plane normal to the z-plane with the incidence angle θ (see Figure 5).…”

Section: Appendixmentioning

confidence: 99%

“…Recent developments in the field of seismo electromagnetics started from the FrenkelBiot model [47,48] treating the charged material of linear poroelastic characteristics (e.g., [14,15] and references cited there in). Assuming a two-phase system of poroelastic media, Biot deduced that there is a third elastic seismic wave (a slow compressive wave) in addition to the ordinary compressive P and shear S waves.…”

Section: Non-newtonian Effectsmentioning

confidence: 99%

“…Pride [14] started to make a kinematic approach to express the frequency-dependent parameter in terms of the electrochemistry of mineral/water interface such as zero potential and surface conductivity and textural parameters of poroelastic rock and solvent [7,15,16,47,48]. The dynamic streaming coefficient is expressed as…”

Section: Appendixmentioning

confidence: 99%

See 3 more Smart Citations

Remote Detection of the Electric Field Change Induced at the Seismic Wave Front from the Start of Fault Rupturing

Fujinawa¹,

Takahashi²,

Noda³

et al. 2011

International Journal of Geophysics

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Seismic waves are generally observed through the measurement of undulating elastic ground motion. We report the remote detection of the Earth's electric field variations almost simultaneously with the start of fault rupturing at about 100 km from the fault region using a special electric measurement. The rare but repeated detection indicates that the phenomenon is real. The characteristic time of diffusion is almost instantaneous, that is, less than 1 second to travel 100 km, more than ten times faster than ordinary seismic P wave propagation. We suggest that the measured electric field changes are produced by the electrokinetic effect through increased pore water pressure of the seismic pulse. It is also suggested that the long range propagation is due to the surface wave mode confined near the interface of the different conductivity. The length scale of the finite strength of the electric field is 16 km, 160 km for electric conductivity of 0.01, 0.001, Sm −1 , respectively. This phenomenon suggests a new seismic sensing method and a new earthquake early warning system providing more seconds of lead time.

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Section: Non-newtonian Effectsmentioning

confidence: 99%

Section: Appendixmentioning

confidence: 99%

Section: Non-newtonian Effectsmentioning

confidence: 99%

Section: Appendixmentioning

confidence: 99%

See 2 more Smart Citations

Remote Detection of the Electric Field Change Induced at the Seismic Wave Front from the Start of Fault Rupturing

Fujinawa¹,

Takahashi²,

Noda³

et al. 2011

International Journal of Geophysics

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“…Fournier (1989) proposed an equation relating the selfpotential to the variation in hydraulic head, which is its thermodynamic source. A first-order approximation of Fourniers equation has been expressed by Revil et al (2003):…”

Section: Redox Environment In Contaminant Plumementioning

confidence: 99%

Groundwater redox conditions and conductivity in a contaminant plume from geoelectrical investigations

Naudet

Revil

Rizzo

et al. 2004

Hydrol. Earth Syst. Sci.

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198

163

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Accurate mapping of the electrical conductivity and redox potential of groundwater is important in delineating the shape of a contaminant plume. A map of redox potential in an aquifer is indicative of biodegradation of organic matter and of concentrations of redox-active components; a map of electrical conductivity provides information on the mineralisation of the groundwater. Both maps can be used to optimise the position of pumping wells for remediation. The self-potential method (SP) and electrical resistivity tomography (ERT) have been applied to the contaminant plume associated with the Entressen landfill in south-east France. The self-potential depends on groundwater flow (electrokinetic contribution) and redox conditions (electro-redox contribution). Using the variation of the piezometric head in the aquifer, the electrokinetic contribution is removed from the SP signals. A good linear correlation (R²=0.85) is obtained between the residual SP data and the redox potential values measured in monitoring wells. This relationship is used to draw a redox potential map of the overall contaminated site. The electrical conductivity of the subsoil is obtained from 3D-ERT analysis. There is good linear correlation (R²=0.91) between the electrical conductivity of the aquifer determined from the 3D-ERT image and the conductivity of the groundwater measured in boreholes. This indicates that the formation factor is nearly homogeneous in the shallow aquifer at the scale of the ERT. From this correlation, a map of the pore water conductivity of the aquifer is obtained.

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Hydraulic conductivity field characterization from the joint inversion of hydraulic heads and self‐potential data

Ahmed

Jardani

Revil

et al. 2014

Water Resources Research

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Pumping tests can be used to estimate the hydraulic conductivity field from the inversion of hydraulic head data taken intrusively in a set of piezometers. Nevertheless, the inverse problem is strongly underdetermined. We propose to add more information by adding self-potential data taken at the ground surface during pumping tests. These self-potential data correspond to perturbations of the electrical field caused directly by the flow of the groundwater. The coupling is electrokinetic in nature that is due to the drag of the excess of electrical charges existing in the pore water. These self-potential signals can be easily measured in field conditions with a set of the nonpolarizing electrodes installed at the ground surface. We used the adjoint-state method for the estimation of the hydraulic conductivity field from measurements of both hydraulic heads and self potential during pumping tests. In addition, we use a recently developed petrophysical formulation of the streaming potential problem using an effective charge density of the pore water derived directly from the hydraulic conductivity. The geostatistical inverse framework is applied to five synthetic case studies with different number of wells and electrodes and thickness of the confining unit. To evaluate the benefits of incorporating the self-potential data in the inverse problem, we compare the cases in which the data are combined or not. Incorporating the self-potential information improves the estimate of hydraulic conductivity field in the case where the number of piezometers is limited. However, the uncertainty of the characterization of the hydraulic conductivity from the inversion of the self-potential data is dependent on the quality of the distribution of the electrical conductivity used to solve the Poisson equation. Consequently, the approach discussed in this paper requires a precise estimate of the electrical conductivity distribution of the subsurface and requires therefore new strategies to be developed for the joint inversion of the hydraulic and electrical conductivity distributions.

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Principles of electrography applied to self‐potential electrokinetic sources and hydrogeological applications

Cited by 171 publications

References 46 publications

Remote Detection of the Electric Field Change Induced at the Seismic Wave Front from the Start of Fault Rupturing

Remote Detection of the Electric Field Change Induced at the Seismic Wave Front from the Start of Fault Rupturing

Groundwater redox conditions and conductivity in a contaminant plume from geoelectrical investigations

Hydraulic conductivity field characterization from the joint inversion of hydraulic heads and self‐potential data

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