Mapping of the magnetic susceptibility of soils of the city of Chaykovskiy

The article presents the results of an assessment of the heterogeneity of the volumetric magnetic susceptibility of soils in the city of Chaikovsky, Perm Territory, based on the results of its spatial modeling. Determination of magnetic susceptibility makes it possible to estimate the concentration of technogenic magnetic particles in urban soils. Their sources in the atmosphere and soil cover of urbanized landscapes are emissions from vehicles, thermal power plants, and industrial enterprises. The non-stoichiometric technogenic magnetite-maghemite complex of minerals in urban soils has an abnormally high magnetic susceptibility and contains potentially dangerous chemical elements belonging to the heavy metals (HM) group in the composition of the crystal lattice of magnetic particles. Cartographic materials make it possible to assess the environmental risk for city residents, identify unfavorable areas and conduct a spatial analysis of the relationship between their location and pollution sources. The purpose of the research is spatial modeling of the magnetic susceptibility of soils in the city of Chaikovsky. The research area covers a section of the city with a total area of 22 km². Spatial modeling was carried out using geostatistical and deterministic methods based on 140 points. As a result of cross-validation, it was found that the most accurate interpolation method is “Ordinary Kriging” with the help of which the boundaries of the contaminated areas of the city of Chaikovsky are established. Within these boundaries, soil samples were taken, in which the content of nickel, copper, zinc, and lead was determined. According to the data obtained, areas with high magnetic susceptibility of soils have higher concentrations of heavy metals. To bring the research results to the administration and residents of the city, a Web GIS application has been developed, access to which is organized through the GitHub platform.