городские почвы

The increase of humus to the emergence of techno and organosorbtion geochemical barrier in the surface lay-ers of urban soils, which contributes to the consolidation of heavy metals and increases the contrast anomalies. Total content of heavy metals in the surface layer of urban soils confirms deposit pollution geochemical barrier humus layer of the soil. The distribution of heavy metals in soil south-eastern city of Kharkiv indicates a certain level of contamination exceeding the industrial area of residential and sanitary protection for Zn and Pb. Land-scape-geochemical state of the city are promoting priority pollutants on the alkaline and biogeochemical barriers in soil and plants. It can be assumed that a mechanism of self-regulation urban landscape that manifests itself in enhanced feedback and confirmed the existence of the identified features of the urban soils.

It was determined that the soil cover of the river valley is characterized by a significant transformation of basic chemical, physical-chemical properties of soil and humus condition that affects the main areas and the intensity of the geochemical migration of chemical elements. In the river valley Lopan there are signs formation of a new man-made physical-chemical alkaline geochemical barrier in superaqual and eluvial-accumulative landscapes (floodplain and floodplain terraces r.Lopan), which contributes to the intensification of surface accumulation of chemical elements and braking processes of vertical and horizontal migration. It is established that the most of the investigated valley alkalinization urban soil surface layer reduces the migration ability of various contaminants, including heavy metals.