¹³⁷Cs Pollution in Soils and Plants of Urban Ecosystems Near the Elektrostal Heavy Machinery Plant

In urban ecosystems to the west of the Elektrostal Heavy Machinery Plant, 6 years after the radiation incident, local areas with a total area of 0.2 km² with an increased equivalent dose rate of γ radiation of 0.15–0.40 μSv/hour and a high specific activity of ¹³⁷Cs reaching 8328–8740 Bq/kg in the upper soil horizons were identified. Statistically significant direct correlations were noted between the specific activity of ¹³⁷Cs in a layer of 0–10 cm of soil and the equivalent dose rate of γ radiation at the surface and height of 1 meter. The types of vertical distribution of ¹³⁷Cs in soils of polluted urban ecosystems, including those on which earth decontamination works were carried out, have been determined. The calculated ¹³⁷Cs transfer coefficients increase in row of tree: Salix alba < Sórbus aucupária < Ácer platanoídes < Malus domestica < Alnus incana < Ácer negúndo; and grassy vegetation: Týpha angustifólia < Artemísia vulgáris < Tussilágo fárfara < Cirsium arvense < Urtíca dióica.