Purpose: to develop the methodology and criteria for assessing the environmental risk of collector channel pollution exposed to anthropogenic impact, and to apply them to the assessment of the collector experimental section.
Materials and methods. To assess the environmental risk of collector pollution, it is recommended to use the following indicators: the land use of the collector surface catchment, the characteristics of the relief of the collector surface catchment, the reclamative afforestation density along the collector, the characteristics of the rural settlement located within the boundaries of the collector catchment, the collector bed, soil pollution of the surface catchment, groundwater mineralization, the specific combinatorial index of water pollution, the total content of phosphates in collector-drainage water (CDW), the characteristics of the bottom sediments, the category of the road passing within the boundaries of the collector catchment.
Results and discussion. A list of diagnostic indicators, assessed in points, was compiled to determine the level of environmental risk of pollution of a collector or its particular section, and a scoring methodology for environmental risk assessment was developed. Using an experimental section of the collector as an example, and all indicators combined, the level of environmental risk of pollution was assessed. The total score was 34, which corresponds to a high acceptable environmental risk and a tense environmental situation at this section. This result indicates the need to implement environmental protection measures at the experimental section of the collector to reduce the negative impact of CDW on the natural water body into which they are discharged.
Conclusions. The developed methodology for environmental risk assessment allows for an assessment of the environmental situation at the experimental section of the collector using diagnostic qualitative and quantitative indicators characterizing the CDW state and level of pollution, bottom sediments in the collector, and soils of its catchment area, in order to develop environmental protection measures.
environmental risk of pollution, collector channel, diagnostic indicators, collector-drainage waters, bottom sediments, catchment soils
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