The Effect of Dielectric Relaxation Processes on the Complex Dielectric Permittivity of Soils at Frequencies From 10 kHz to 8 GHz—Part I: Experimental

Бобров, П. П.; Belyaeva, T. A.; Kroshka, E. S.; Родионова, О. В.

doi:10.1109/tgrs.2022.3180727

Cited by 12 publications

(4 citation statements)

References 48 publications

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“…Despite having many advantages, this method of sample preparation is associated with a lot of disadvantages. It has been observed that there has been a change in mechanical strength, electrical resistance, and dielectric permittivity of soil at low frequencies within a few hours after the addition of water to dried soil samples (Bobrov et al, 2019(Bobrov et al, , 2022Fedotov et al, 2005).…”

Section: Moisture Content Analysis and Sample Preparation Of Soil Sam...mentioning

confidence: 99%

Evaluation of the impact of wastewater irrigation on the soil's dielectric parameters

Palta,

Kumar,

Kaur

2024

Land Degrad Dev

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This study investigates the impact of wastewater irrigation on soil dielectric parameters, focusing on the often‐overlooked aspect of dielectric properties in contaminated soil. Wastewater, a significant contributor to soil and groundwater degradation, has long‐term effects on soil physical, chemical, and dielectric characteristics. Experimental measurements conducted overtime at 2.45 and 5.8 GHz frequencies reveal a correlation between wastewater irrigation and changes in dielectric properties. Emphasizing time variation as a pivotal independent variable, the study sheds light on its substantial influence on soil dielectric behavior. Notably, the research introduces an alternative methodology for the comprehensive evaluation of wastewater‐induced pollution effects on soil properties. This approach is substantiated by meticulous physicochemical analyses conducted on both pollution sources and the affected soil. The study further presents a robust response surface method‐based model, showcasing impressive accuracy with dielectric properties (ε′ and ε″) and penetration depth with R2 values of 0.9845, 0.9831, and 0.9528, respectively. Beyond unveiling crucial insights into the intricate interplay of wastewater and soil dielectric behavior, this research contributes to the development of effective strategies for pollution monitoring and management in soil ecosystems.

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Section: Moisture Content Analysis and Sample Preparation Of Soil Sam...mentioning

confidence: 99%

Evaluation of the impact of wastewater irrigation on the soil's dielectric parameters

Palta,

Kumar,

Kaur

2024

Land Degrad Dev

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“…For clayey materials in the GPR operating frequency range, the relationship between grain size, mineralogy, volumetric water content, and the constitutive parameters

{\varepsilon }_{\mathrm{e}\mathrm{f}\mathrm{f}}^{\prime }

and

{\sigma }_{\mathrm{e}\mathrm{f}\mathrm{f}}^{\prime }

is non‐trivial and still a topic of current research (e.g., Bobrov et al., 2022; Loewer et al., 2017). Even minor amounts of clay (5%–10%) has been shown to greatly change both the value and frequency‐dependence of

{\varepsilon }_{\mathrm{e}\mathrm{f}\mathrm{f}}^{\prime }

and

{\sigma }_{\mathrm{e}\mathrm{f}\mathrm{f}}^{\prime }

(Patriarca et al., 2013).…”

Section: Radar Wave Propagationmentioning

confidence: 99%

“…For clayey materials in the GPR operating frequency range, the relationship between grain size, mineralogy, volumetric water content, and the constitutive parameters 𝐴𝐴 𝐴𝐴 ′ ef f and 𝐴𝐴 𝐴𝐴 ′ ef f is non-trivial and still a topic of current research (e.g., Bobrov et al, 2022;Loewer et al, 2017). Even minor amounts of clay (5%-10%) has been shown to greatly change both the value and frequency-dependence of 𝐴𝐴 𝐴𝐴 ′ ef f and 𝐴𝐴 𝐴𝐴 ′ ef f (Patriarca et al, 2013).…”

mentioning

confidence: 99%

Crosshole Ground‐Penetrating Radar in Clay‐Rich Quaternary Deposits: Toward Characterization of High‐Loss Media

et al. 2023

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“…В данной работе исследовано влияние объемной влажности от 0% до 40% (вертикальных профилей влажности), плотности сухого сложения от 0.4 до 1.8 г/см 3 , содержания глинистой фракции от 0.15 до 0.55 г/г (типа агропочвы), среднеквадратических отклонений (СКО) высот неровностей поверхности от 0 до 4 см почвенного покрова на вариации коэффициента отражения в сверхширокой полосе частот от 100-400 МГц до 1. 26 частот (ниже первых десятков МГц) [7]; с другой стороны, волны СВЧ диапазона (первые единицы ГГц) обладают ограниченной глубиной проникновения в почву и значительным рассеянием на случайных неровностях поверхности почвы и элементах растительного покрова [8].…”

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Dependence of the reflective properties of agricultural soils in ultra-wide frequency band on the type, surface roughness and moisture profiles of agrosoils

Миронов¹,

Fomin²,

Karavayskiy³

2022

JRE

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In this article, the impact of volumetric moisture from 0% to 40% (vertical moisture profiles), dry bulk density from 0.4 to 1.8 g/cm3, clay content from 0.15 to 0.55 g/g (agrosoil type), standard deviations heights of surface roughness from 0 to 4 cm of soil on the variations of reflection coefficient in the ultra-wide frequency band from 100-400 MHz to 1.26-2.4 GHz were investigated. The reflection coefficient was calculated for a smooth and rough soil surface. Mironov's two-relaxation dielectric model was used (input parameters: dry bulk density, clay content, volumetric moisture, frequency of electromagnetic wave) to calculating the reflection coefficient. It is shown that the reflection coefficient is an ambiguous function of the clay content and the dry bulk density; the error in retrieving high values of soil moisture can be 5 times higher than for dry soils. In relation to the clay content and the dry bulk density, the soil roughness is the dominant parameter, which uncertainty, significantly effects on the error of soil moisture retrieving. For the considered various vertical profiles of soil moisture, it is shown that the effective thickness of topsoil, which forms the reflection coefficient, does not exceed 2 cm at a sensing frequency above 1 GHz. When the volumetric moisture content of soil surface is more than 28%, the reflection coefficient in the frequency range from 433 MHz to 1.26 GHz does not depend on the vertical distribution of moisture in soil. The conducted studies establish quantitative limitations on the accuracy of soil moisture retrieval for a given error in the initial parameters of the model: the clay content, the dry bulk density, soil surface roughness, which should be taken into account when developing algorithms for remote sensing of agrosoil moisture.

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The Effect of Dielectric Relaxation Processes on the Complex Dielectric Permittivity of Soils at Frequencies From 10 kHz to 8 GHz—Part I: Experimental

Cited by 12 publications

References 48 publications

Evaluation of the impact of wastewater irrigation on the soil's dielectric parameters

Evaluation of the impact of wastewater irrigation on the soil's dielectric parameters

Crosshole Ground‐Penetrating Radar in Clay‐Rich Quaternary Deposits: Toward Characterization of High‐Loss Media

Dependence of the reflective properties of agricultural soils in ultra-wide frequency band on the type, surface roughness and moisture profiles of agrosoils

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