Purpose: to study the degree of pollution of bottom sediments and accumulation of heavy metals in them in collector sections, differentiated by sources of anthropogenic impact on the surface watershed.
Materials and methods. The morphometric characteristics of the collector surface watershed divided into typical sections are given. The initial data were the results of laboratory studies of bottom sediments and water from the collector and the source of the Podpolnaya River. The degree of accumulation of heavy metals by bottom sediments was assessed based on the bottom accumulation coefficient.
Results. The surface watershed of the collector is represented by irrigated and dryland lands, and residential areas. The highest degree of pollution was characteristic of bottom sediments collected in the collector within the boundaries of a residential area, the least – within the boundaries of irrigated lands. At all monitored collector points, concentrations of lead, copper, zinc and manganese in bottom sediments exceeded their concentrations in the aquatic environment, indicating high levels of accumulation (the maximum bottom accumulation coefficient reached 90,500) at all studied sections throughout the growing season, with the exception of manganese, which is characterized by high migration activity. The maximum level of zinc accumulation was observed at the collector point, the surface catchment area of which is located within the boundaries of a residential area.
Conclusions. High levels of heavy metal accumulation in the bottom sediments of the collector were established. When bottom sediments become saturated with these elements, they are released back into the aquatic environment. Consequently, bottom sediments become a source of secondary pollution of the aquatic environment. These factors indicate the need to clean the collector channels of bottom sediments.
doi: 10.31774/2712-9357-2026-16-1-80-99
anthropogenic impact, surface watershed differentiation, bottom sediments, pollutant accumulation, collector channel, heavy metals
Drovovozova T. I., Vlasov M. V., Krasovskaya N. N., Olgarenko D. I. Accumulation of heavy metals in collector bottom sediments taking into account the surface watershed differentiation by sources of anthropogenic impact. Land Reclamation and Hydraulic Engineering. 2026;16(1):80–99. (In Russ.). https://doi.org/10.31774/2712-9357-2026-16-1-80-99.
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