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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2026, V. 23, No. 2, pp. 248-262

Some behavior features of electrophysical and dielectric characteristics of solonchak with chloride-sulfate type of soil salinization

A.N. Romanov 1 
1 Institute for Water and Environmental Problems SB RAS, Barnaul, Russia
Accepted: 13.02.2026
DOI: 10.21046/2070-7401-2026-23-2-248-262
Solonchaks, characterized by high concentration of mineral salts, are particularly aggressive to plants growing there. The dehydrated surface of a solonchak is a source of finely dispersed fractions of mineral salts, which can travel significant distances due to wind transport. The potential danger of solonchaks as sources of chemical pollution in adjacent areas makes it a priority to develop highly accurate operational methods for diagnosing the ecological state of solonchaks based on a detailed study of their electrophysical and dielectric properties. The dielectric properties of solonchaks depend on the combined effects of temperature, volumetric moisture, salinity, and type of soil salts. In this study, diurnal variations in electrical conductivity and real and imaginary parts of the complex dielectric permittivity of solonchak soil with chloride-sulfate soil salinity were studied at a frequency of 50 MHz during the summer-autumn period. In situ studies showed sharp increases in electrical conductivity and real and imaginary parts of complex dielectric permittivity of solonchak soils over a short period of time (10–20 minutes) with increasing ambient temperature. This behavior of electrical conductivity and complex dielectric permittivity may be due to the increase in solubility of mineral salts with temperature. This results in changes in the ionic composition of soil moisture and the volume fraction of undissolved mineral salts. Based on the results of in situ studies, the dependences of electrical conductivity and complex permittivity on temperature in the range of –16 to +29 °C and volumetric moisture in the range of 0.01 to 0.35 cm3/cm3 were calculated.
Keywords: solonchaks, thermodynamic temperature, volumetric moisture, electrical conductivity, complex permittivity, microwave range
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