[1666] - Using electrical anisotropy for structural characterization of sediments: an experimental validation study

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Al-Hazaimay, S., Huisman, J. A., Zimmermann, E., Vereecken, H., 2016. Using electrical anisotropy for structural characterization of sediments: an experimental validation study. Near Surface Geophysics, 14, 357 - 369. DOI: 10.3997/1873-0604.2016026.
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Title(s):Main Title: Using electrical anisotropy for structural characterization of sediments: an experimental validation study
Description(s):Abstract: Improved characterization of subsurface heterogeneity is important to better understand a range of key processes in the hydrologic cycle, such as overland flow, infiltration into the soil, evaporation to the atmosphere, and transpiration by plants. Recently, synthetic modelling studies have shown that information on subsurface heterogeneity can be obtained from the anisotropy in electrical resistivity. The objective of this paper is to experimentally validate the findings of this synthetic modelling study. In order to do so, we developed a new measurement procedure to determine the effective complex electrical resistivity from a set of current injections and voltage measurements on a heterogeneous sample. A synthetic modelling study showed that this new measurement procedure was able to reproduce the results of the previous study that showed how the electrical properties and the correlation length ratio of bimodal distributions of two materials can be obtained from the effective complex electrical resistivity measured in two perpendicular directions. After validation of the new measurement approach, we constructed two bimodal distributions in a 2D measurement cell and applied the newly developed measurement strategy. We were able to estimate the electrical properties, the volume fraction, and the correlation length ratio with good accuracy from the complex resistivity measurements in two directions. The remaining differences were attributed to variations in sediment thickness that occurred during sample preparation. We conclude that anisotropy should not be ignored but embraced when dealing with subsurface heterogeneity and that proper interpretation of anisotropy may actually be used to characterize subsurface heterogeneity.
Identifier(s):DOI: 10.3997/1873-0604.2016026
Responsible Party
Creator(s):Author: Sadam Al-Hazaimay
Author: Johan A. Huisman
Author: Egon Zimmermann
Author: Harry Vereecken
Publisher:European Association of Geoscientists & Engineers
TR32 Topic:Soil
Related Sub-project(s):A3
Subject(s):CRC/TR32 Keywords: SIP
File Details
File Name:AlHazaimay2016.pdf
Data Type:Text
File Size:1489 kB (1.454 MB)
Date(s):Created: 2017-05-29
Mime Type:application/pdf
Data Format:PDF
Download Permission:OnlyTR32
General Access and Use Conditions:According to the TR32DB data policy agreement.
Access Limitations:According to the TR32DB data policy agreement.
Licence:TR32DB Data policy agreement
North:-no map data
Measurement Region:Laboratory
Measurement Location:--Laboratory--
Specific Informations - Publication
Article Type:Journal
Source:Near Surface Geophysics
Number Of Pages:14
Page Range:357 - 369
Metadata Details
Metadata Creator:Johann Alexander (Sander) Huisman
Metadata Created:2017-05-29
Metadata Last Updated:2017-06-01
Funding Phase:2
Metadata Language:English
Metadata Version:V41
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