Enhancing understanding of soil electrical behavior: multi-variable analysis and correlation modeling

IF 2.3 4区 地球科学
Soumitra Kumar Kundu, Rajat Debnath, Ashim Kanti Dey
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引用次数: 0

Abstract

Electrical resistivity (ER) approach leverages soil’s electrical behavior to detect its anomaly in a non-destructive (NDT) manner. This behavior is influenced by varying parameters which include soil’s resistivity, particle size gradation, physical parameters (water content, porosity and density), salinity and temperature which are amongst most crucial ones. Considering all above parameters, field ER tends to provide a continuous subsurface profile in a quick, effective and reliable manner resulting in increase of usage in the past decades. ER measurements are not only confined to in situ tests, but laboratory setup is also developed to estimate ER values. In this context, researchers in the past have adopted both field- and laboratory-based resistivity values to establish correlations with varying soil properties showcasing significant limitations in the form of site-specific nature with single input variable. In this context, the present study aims to evaluate effect of multiple parameters in the form of temperature, clay content, salinity, density, air content and water content on resistivity of soil. Results derived from the current analysis clearly showcases that effect of multiple parameters has a profound impact on soil’s resistivity compared to a single parameter. Further, correlationships were also developed involving simple and multiple regression analysis which resulted in formation of multi-variable model having coefficient of correlation (R2) value of 0.97. Furthermore, sensitivity of variables was also analyzed to ascertain effect of individual parameter on resistivity. Based on derived data, it could be inferred that density and temperature were found to be the most least sensitive input variables. Thus, results derived from the present study would play a pivotal role in accurate assessment of ER values.

提高对土壤电行为的理解:多变量分析和相关建模
电阻率(ER)方法利用土壤的电行为以非破坏性(NDT)的方式检测其异常。这种行为受到各种参数的影响,包括土壤的电阻率、粒度级配、物理参数(含水量、孔隙度和密度)、盐度和温度,这些都是最重要的参数。考虑到上述所有参数,在过去的几十年里,现场ER倾向于以快速、有效和可靠的方式提供连续的地下剖面。ER测量不仅局限于原位测试,而且还开发了实验室装置来估计ER值。在这种情况下,过去的研究人员采用了基于现场和实验室的电阻率值来建立与不同土壤性质的相关性,这显示了单一输入变量的特定地点性质的显著局限性。在此背景下,本研究旨在评价温度、粘土含量、盐度、密度、空气含量和含水量等多种参数对土壤电阻率的影响。目前的分析结果清楚地表明,与单一参数相比,多个参数的影响对土壤电阻率的影响更大。进一步,通过简单回归和多元回归分析建立相关关系,形成相关系数(R2)为0.97的多变量模型。此外,还分析了各变量的敏感性,以确定各参数对电阻率的影响。根据导出的数据,可以推断密度和温度是最不敏感的输入变量。因此,本研究的结果将在准确评估ER值方面发挥关键作用。
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来源期刊
Acta Geophysica
Acta Geophysica GEOCHEMISTRY & GEOPHYSICS-
CiteScore
3.80
自引率
13.00%
发文量
251
期刊介绍: Acta Geophysica is open to all kinds of manuscripts including research and review articles, short communications, comments to published papers, letters to the Editor as well as book reviews. Some of the issues are fully devoted to particular topics; we do encourage proposals for such topical issues. We accept submissions from scientists world-wide, offering high scientific and editorial standard and comprehensive treatment of the discussed topics.
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