To analyze heavy metal contamination of urbanized soil in the Vladimir city, the soil was sampled and studied. The city area is represented by sod-medium podzolic and gray forest urbanized soil. Soil samples analysis included lead, zinc, copper, nickel, manganese, cobalt and chromium. The resulted parameters were compared to the maximum permissible concentrations and background values. The regularities between the studied sites proximity to the industrial enterprises and heavy metals concentration in soil have been found. The coefficients of heavy metals accumulation in soil have been calculated and the metals as priority pollutants with the highest accumulation coefficient have been identified. By calculating the cumulative accumulation index, the city area has been differentiated according to the hazardous degree. The research peculiarity comprises the sampling locations selection – school sites, as the child population is the most vulnerable to the diseases, associated with the heavy metals accumulation in soil.

Abstract. Studies were conducted to determine such indicators as humus, heavy metals, and enzymatic activity in the soils of uncultivated farmlands of the Vladimir region located in the Klyazma river basin. In the course of field research in 2018, soil samples were selected at 13 points representing various landscape areas belonging to the Klyazma river basin. According to the results of research, a positive relationship between the activity of soil enzymes and the content of humus was established. In the soils of uncultivated farmland, where there is a high concentration of soil enzymes, a high percentage of humus was found from 2.88% to 3.96%. The dependence between the indicators of activity of soil enzymes and anthropogenic impact was revealed. Thus, the transition from deposits to the meadow, i.e. reduce anthropogenic impact on the soil, there is a sharp increase in the activity of soil invertase, catalase and dehydrogenase, an active process of humification of soil. The detected concentrations of heavy metals in soil samples of uncultivated farmland do not exceed the standards set for the approximate permissible concentrations, but their quantitative content has increased significantly over the past decade, their accumulation occurs and there is a potential danger in the case of secondary input of these soils into agricultural use.

Возрастающий научный интерес к исследованиям наземных геосистем на основе бассейнового подхода обуславливает необходимость применения компьютерного моделирования. Целью исследования является представление картографических данных в виде цифровых моделей рельефа, отражающих особенности территории. При помощи программного обеспечения выполнена обработка картографических материалов бассейна реки Клязьма. С использованием программы AutoCAD проведена 3D-визуализация фрагмента территории. Результатом исследования является построение 3D-модели всей территории бассейна.

Heavy metals pollution analysis of urban land in the city of Vladimir was performed. Soil samples were evaluated for lead, zinc, copper, nickel, manganese, cobalt and chromium. Obtained indicators were compared with MAC and background values. Regularities were identified of study areas proximity to industrial enterprises and heavy metals concentration in soils. Coefficients of heavy metals accumulation in soils were calculated and priority metal pollutants with the highest accumulation coefficients were identified, namely lead, arsenic and zinc.