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oa Asessment of Environmental Risks of Pollution with Chemical Substances According to the Probability Approach
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 17th International Conference Monitoring of Geological Processes and Ecological Condition of the Environment, Nov 2023, Volume 2023, p.1 - 5
Abstract
Methodical approaches to quantitative assessments of environmental risks of water pollution in rivers based on hydrochemical data using probabilistic methods are considered in the work. Environmental risks were calculated as averages weighted by the probability of exceeding standards (maximum permissible concentrations, MPC) of the content of pollutants in surface waters. A method of building a qualitative and quantitative scale of environmental risks based on the use of statistical relationships between environmental risk indicators and water quality indices with their subsequent semantic matching is proposed. In order to assess the probability of the degree of pollution of the river by one or another type of pollutants, an analysis of the empirical frequency curve is carried out, according to which estimates of the risks of pollution in different gradations are provided. In the work, the quantitative indicator of water pollution by chemical substances was evaluated as one of the variants of the modified water pollution index (WPI), in which, in addition to the mandatory ones, certain groups of pollutants are used. The proposed approach was used to determine the environmental risk of pollution by heavy metals (Siversky Dinets basin) and biogenic substances (North-Western Black Sea region), nitrogen compounds (Dniester, Odesa region).
