Assessing Soil Bulk Density, Plasticity Index, Porosity, and Degree of Saturation through Electrical Resistivity using Correlation Analysis

Memon, Muhammad Burhan and Yang, Zheng and Qazi, Waqar Hussain and Pathan, Shafi Muhammad and Chalgri, Saleem Raza (2024) Assessing Soil Bulk Density, Plasticity Index, Porosity, and Degree of Saturation through Electrical Resistivity using Correlation Analysis. Malaysian Journal of Soil Science (MJSS) (Malaysia), 28. pp. 12-25. ISSN 1394-7990

The factor of safety for soil slopes is a crucial aspect of slope investigations, necessitating a thorough understanding of subsurface soil properties. Traditionally, borehole sampling has been employed for accurate assessment, despite its drawbacks of being costly and time-intensive. However, the emergence of electrical resistivity as a non-invasive technique presents a promising alternative. This method allows for efficient evaluation of subsurface soil properties, requiring minimal time and effort. The study aims to correlate soil properties such as bulk density, plasticity index, porosity, and degree of saturation with the electrical resistivity technique and present possible outcomes. The laboratory-scale Wenner probes method was used for the determination of electrical resistivity. The correlations obtained were analyzed using the correlation analysis method. The correlation between electrical resistivity and plasticity index showed an increased regression value of 0.33 for silty sand samples. For the relationship between resistivity and bulk density, the regression value was 0.32 for clay and silty sand soil samples combined. The correlation between electrical resistivity and porosity for all soil samples and silty sand soil showed R² values of 0.20 and 0.36 respectively. However, no relationship was found for clay soil samples while a weak relationship was found for the correlation between degree of saturation and resistivity. The correlations identified suggest that the electrical resistivity method is viable for assessing soil properties, although further comprehensive studies are needed to investigate weak relationships. The outcomes of the study may help bridge the gap in identifying geotechnical and geophysical data.

Full text available from: Official URL: https://www.msss.com.my/mjss/Full%20Text/vol28/V28...

Abstract

The factor of safety for soil slopes is a crucial aspect of slope investigations, necessitating a thorough understanding of subsurface soil properties. Traditionally, borehole sampling has been employed for accurate assessment, despite its drawbacks of being costly and time-intensive. However, the emergence of electrical resistivity as a non-invasive technique presents a promising alternative. This method allows for efficient evaluation of subsurface soil properties, requiring minimal time and effort. The study aims to correlate soil properties such as bulk density, plasticity index, porosity, and degree of saturation with the electrical resistivity technique and present possible outcomes. The laboratory-scale Wenner probes method was used for the determination of electrical resistivity. The correlations obtained were analyzed using the correlation analysis method. The correlation between electrical resistivity and plasticity index showed an increased regression value of 0.33 for silty sand samples. For the relationship between resistivity and bulk density, the regression value was 0.32 for clay and silty sand soil samples combined. The correlation between electrical resistivity and porosity for all soil samples and silty sand soil showed R² values of 0.20 and 0.36 respectively. However, no relationship was found for clay soil samples while a weak relationship was found for the correlation between degree of saturation and resistivity. The correlations identified suggest that the electrical resistivity method is viable for assessing soil properties, although further comprehensive studies are needed to investigate weak relationships. The outcomes of the study may help bridge the gap in identifying geotechnical and geophysical data.

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Item Type:	Article
AGROVOC Term:	soil properties
AGROVOC Term:	soil porosity
AGROVOC Term:	soil density
AGROVOC Term:	laboratory techniques
AGROVOC Term:	geophysical surveys
AGROVOC Term:	clay soils
AGROVOC Term:	electrical conductivity
Geographical Term:	China
Depositing User:	Mr. Khoirul Asrimi Md Nor
Date Deposited:	20 May 2025 03:07
Last Modified:	20 May 2025 03:07
URI:	http://webagris.upm.edu.my/id/eprint/2795

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