RETROSPECTIVE ANALYSIS OF DYNAMICS OF QUALITY CHANGES IN SURFACE WATER OF THE RIVER PRIPYAT UPPER FLOW WITHIN WESTERN POLISSІA OF UKRAINE

Abstract

Characteristics of the composition and properties of water as a component of the aquatic ecosystem and the living environment of hydrobionts, as well as its suitability for specific purposes, are used by man to call - the quality of water. Determination of the quality of surface water is based on the environmental classification, which includes a set of hydrophysical, hydrochemical, hydrobiological, and other indicators that reflect the features of the constituent parts of aquatic ecosystems. The ecological classification is a criterion base for environmental assessment of the quality of surface water, and the latter is an integral part of the regulatory framework for a comprehensive characterization of the state of the environment and a basis for assessing the impact of human activities on the environment.The main objective of the research is the environmental  assessment of the retrospective state of surface waters of the Pripyat River within the Western Polissia of Ukraine. The object of the study is the surface waters of the Pripyat River (within the Western Polissia of Ukraine).The subject of the study is the environmental parameters of the runoff of the surface waters of the Pripyat River within the Western Polissia of Ukraine. An ecological assessment of the surface water status of the Pripyat River in the Western Polissia of Ukraine on the basis of the classification of the quality of surface water of land, on three sets of indicators: salt composition, trophic-saprobiological (ecological and sanitary) and specific toxic substances. On their basis, a joint environmental assessment of the quality of surface waters of the upper reaches of the Pripyat River has been carried out. An analysis of the dynamics of changes in water quality indicators in the far and near retrospective is carried out. The results of the environmental assessment will be used to establish ecological standards for water quality and to manage the ecological status of the Western Polissia rivers of Ukraine.