Relationships between the Electrical and Hydrogeological Properties of Rocks and Soils

Lesmes, David; Friedman, Shmulik P.

doi:10.1007/1-4020-3102-5_4

Cited by 217 publications

(197 citation statements)

References 99 publications

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“…From applying the previous equations, it must be taking into account that the effective porosity may be smaller than the calculated total porosity depending upon the type of pore system. Lesmes and Friedman (2005) reported that the porosity of the limestone was ranged from 15 to 29%. All the previous porosity values matched with the calculated values of the porosity of this aquifer.…”

Section: (D) Porosity Calculationmentioning

confidence: 99%

Resistivity method contribution in determining of fault zone and hydro-geophysical characteristics of carbonate aquifer, eastern desert, Egypt

2018

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Determination of fault zone and hydro-geophysical characteristics of the fractured aquifers are complicated, because their fractures are controlled by different factors. Therefore, 60 VESs were carried out as well as 17 productive wells for determining the locations of the fault zones and the characteristics of the carbonate aquifer at the eastern desert, Egypt. The general curve type of the recorded rock units was QKH. These curves were used in delineating the zones of faults according to the application of the new assumptions. The main aquifer was included at end of the K-curve type and front of the H-curve type. The subsurface layers classified into seven different geoelectric layers. The fractured shaly limestone and fractured limestone layers were the main aquifer and their resistivity changed from low to medium (11-93 Ω m). The hydro-geophysical properties of this aquifer such as the areas of very high, high, and intermediate fracture densities of high groundwater accumulations, salinity, shale content, porosity distribution, and recharging and flowing of groundwater were determined. The statistical analysis appeared that depending of aquifer resistivity on the water salinities (T.D.S.) and water resistivities add to the fracture density and shale content. The T.D.S. increasing were controlled by Na + , Cl − , Ca 2+ , Mg 2+ , and then (SO 4 ) 2− , respectively. The porosity was calculated and its average value was 19%. The hydrochemical analysis of groundwater appeared that its type was brackish and the arrangements of cation concentrations were Na + > Ca 2+ > Mg 2+ > K + and anion concentrations were Cl − > (SO 4 ) 2− > HCO 3 − > CO 3 − . The groundwater was characterized by sodium-bicarbonate and sodium-sulfate genetic water types and meteoric in origin. Hence, it can use the DC-resistivity method in delineating the fault zone and determining the hydro-geophysical characteristics of the fractured aquifer with taking into account the quality of measurements and interpretation.

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Section: (D) Porosity Calculationmentioning

confidence: 99%

Resistivity method contribution in determining of fault zone and hydro-geophysical characteristics of carbonate aquifer, eastern desert, Egypt

2018

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“…This exponent has been observed to be about 2 for consolidated rocks and in the range 1.3 < n < 2 for coarse-texture sand (Guichet et al, 2003;Lesmes & Friedman, 2005;Schön, 1996). Note that the use of Archie's law is valid in the absence of surface electrical conductivity.…”

Section: C(s Wmentioning

confidence: 96%

Electrokinetic Techniques for the Determination of Hydraulic Conductivity

Jouniaux¹

2011

Hydraulic Conductivity - Issues, Determination and Applications

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“…The subsurface electrical conductivity (s) structure is calculated dynamically as a function of the liquid volume content, h, in Eq. (A-4) using Archie's law (Archie, 1942;Lesmes and Friedman, 2005):…”

Section: Determination Of Variably Saturated Model Input Parametersmentioning

confidence: 99%

Hydrogeophysical Investigations at Hidden Dam, Raymond, California

Minsley

Burton

Ikard

et al. 2011

JEEG

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Self-potential and direct current resistivity surveys are carried out at the Hidden Dam site in Raymond, California to assess present-day seepage patterns and better understand the hydrogeologic mechanisms that likely influence seepage. Numerical modeling is utilized in conjunction with the geophysical measurements to predict variably-saturated flow through typical two-dimensional dam cross-sections as a function of reservoir elevation. Several different flow scenarios are investigated based on the known hydrogeology, as well as information about typical subsurface structures gained from the resistivity survey. The flow models are also used to simulate the bulk electrical resistivity in the subsurface under varying saturation conditions, as well as the self-potential response using petrophysical relationships and electrokinetic coupling equations.The self-potential survey consists of 512 measurements on the downstream area of the dam, and corroborates known seepage areas on the northwest side of the dam. Two directcurrent resistivity profiles, each approximately 2,500 ft (762 m) long, indicate a broad sediment channel under the northwest side of the dam, which may be a significant seepage pathway through the foundation. A focusing of seepage in low-topography areas downstream of the dam is confirmed from the numerical flow simulations, which is also consistent with past observations. Little evidence of seepage is identified from the self-potential data on the southeast side of the dam, also consistent with historical records, though one possible area of focused seepage is identified near the outlet works. Integration of the geophysical surveys, numerical modeling, and observation well data provides a framework for better understanding seepage at the site through a combined hydrogeophysical approach.

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Relationships between the Electrical and Hydrogeological Properties of Rocks and Soils

Cited by 217 publications

References 99 publications

Resistivity method contribution in determining of fault zone and hydro-geophysical characteristics of carbonate aquifer, eastern desert, Egypt

Resistivity method contribution in determining of fault zone and hydro-geophysical characteristics of carbonate aquifer, eastern desert, Egypt

Electrokinetic Techniques for the Determination of Hydraulic Conductivity

Hydrogeophysical Investigations at Hidden Dam, Raymond, California

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