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Документ Quantitative Assessment of Water Resources and Evaluation of Water Quality (on the Example of Sumy Region)(2021-06) Данильченко Олена Сергіївна; Danylchenko Olena Serhiivna; Корнус Анатолій Олександрович; Kornus Anatolii Oleksandrovych; Корнус Олеся Григорівна; Kornus Olesia HryhorivnaThe study is devoted to the development and testing of the methodology for assessing water resources, which involves a combination of their quantitative assessment, determination of water quality and taking into account the basin principle, which is a modern approach to water resources management. A step-by-step algorithm for estimating water resources of Sumy region in the context of the basins of the main rivers of the region is created. The first step is to estimate the quantitative indicators of water resources (water supply of total runoff, local runoff and underground predicted resources per capita, as well as drainage into surface water bodies, volumes of discharged polluted return waters in the main river basins of the region). The second step is to assess the quality of water resources (stability of surface waters, water pollution index, anthropogenic pressure on river basins). This methodology was tested in the assessment of water resources of Sumy region in terms of basins of the main rivers of the region. It is established that water resources of the Desna river basin within Sumy region are characterized by a level “above average”, which is associated with high water supply of total and local runoff, predicted groundwater resources and maximum surface water stability in the region. Water resources of the Vorskla, Seim and Sula river basins are characterized by an average integrated value. The water resources of the Psel river basin have a low value due to low water supply, which can be explained by such factors as densely populated area of the basin, high drainage rates, high water pollution and significant levels of anthropogenic pressure on natural complexes of the river basin.