Korobkova G. V.

Puporse. Approbation of the application of the method for assessment the ecological state of the rivers of the forest-steppe and steppe physiographic regions of Ukraine and justifying the possibility of using the aquatic macrophyte communities in the "Methodology for the Environmental Assessment of Surface Water Quality in the Corresponding Categories". Methods. Based on materials of the expeditionary surveys with the usage of MMOR Polish method the typing and environmental assessment of Seversky Donets basin within the Kharkiv region are done. Results. The results of the application of the method for assessing the state of rivers with the help of macrophytes MOOR for the Seversky Donets River basin were carried out for the first time and showed significant consistency with earlier assessments of the ecological state of the Seversky Donets River on a complex of chemical and biological methods.The results of MIR indices varied within 23.0 - 37.9. The analyses of the obtained data indicates that "moderate" ecological status (Grade 3 – eutrophic status) was observed on the majority sites. "Good" status (Grade 2 – mesotrophic status) noted in 7 sites and only 2 sites with "bad" status (Grade 5 – hippertrophic status). An spatial distribution ecological status by MIR of Seversky Donets River and its major tributaries within the Kharkiv region. The classification scheme for the use of the index MIR in the "Methodology environmental assessment of surface water quality for the respective categories" was done. Conclusions. The use of the MMOR method is advisable in the "Methodology for the Environmental Assessment of Surface Water Quality ...". The method allows to attract the macrophyte community to assess the ecological state of surface water bodies, which makes an ecological assessment of the quality of surface waters more thorough.

Із використанням моніторингової інформації за 2014 рік здійснено інтегральну оцінку сучасного стану й просторових змін якості вод річки Сіверський Донець. Показано, що найкраща якість води, як за With the use of monitoring data for 2014 was carried out an integrated assessment of the current state and spatial changes in water quality of the river Siversky Donets. It is shown that the best water quality, according to the water management assessment (Index = 1.35) and the environmental (Ie = 2.99) was observed in Pecheniz'ke reservoir. The overall tendency of worsening water quality downstream of the Siversky Donets is noted. The worst water quality according to assessment for water management and the most significant decline in the quality of water (Index = 2.97, +1.62 from the previous paragraph, Ie = 3.92, +0.93) was recorded below the confluence riv. Udy. The worst water quality for environmental assessment (Ie = 4.32) in Index = 2.89 is noted below Izium.