Karliuk A. Enhancement of ecological safety of the Siversky Donets river and Liman group lakes in the area of Zmievskaia TES impact

Dissertation is aimed at solving the scientific problem of support the ecological safety of water bodies in the Zmiev TES area by monitoring the processes of formation of a surface water quality in the lakes of Liman entity. The author has motivated the necessity to perform chemical analytical and biological investigations of water bodies located in the area of Zmiev TES impact using the system analysis, determination of the control centers and controlled parameters, analysis of the selected water surface probes together with bottom sediments by and microbiological analysis. In this work, the influence of external conditions and the internal water body processes on the formation of water quality in the lakes of Liman group has been identified, the comparative analysis of retrospective and modern ecological state of the water bodies under study has been performed. The self-purification processes of the lakes of Liman group and specific areas of Siversky Donets river were analyzed under effect of natural and anthropogenic contributions to surface catchment. On the basis of analysis performed in the frame of a physico-chemical model of the system «lake Chaika – lake Lichove – Siversky Donets river», the chemical equilibrium was calculated for the Liman group lakes, which are to be considered as the output model object in further more large-scale and complicated water-economic complexes. The technique is proposed for estimation of the level of influence of the Lake Chaika on the water quality of Siverski Donets river taking into consideration the admission to the river of pollutants on account of technogenic waters and filtrates from the lake. The effect of a filtration waste from the lake Chaika on Siversky Donets river is validated scientifically. The prognostic simulations of water quality formation in the Siversky Donets river and Liman group lakes is performed, and the priority indicators of their composition are established. The improved route of the additional cleansing of waste waters at the bio-plato of Chaika-lake is proposed. The water protection measures are justified for enhancement of ecological safety of the Siversky Donets river and Liman group lakes in the area of Zmievskaja TES impact. Key words: Siversky Donets river, Liman group lakes, Zmiivska TES, surface water pollution, modern ecological state, water quality forecasting, ecological safety