The security of the territory with water resources is decisive factor at construction and operation of capacities, including the largest consumers of wa-ter, i.e. the enterprises of power, namely thermal power plants. The impact on natural water objects operated by the complex of thermal power plant on the volumes and variety on global scale is consid-erable. Evidence-based analysis of factors of for-mation of water quality, the assessment of self-clearing ability of the ecosystem of newly built res-ervoirs-coolers is necessary to overcome the con-sequences of natural ecosystems "development". Monitoring and statistical processing of the results with quantitative assessment of change of natural parameters of water quality for considerable time interval gives the chance of forecasting water quali-ty of reservoirs-coolers necessary for ensuring economically effective energy production. At design stage of the reservoir-cooler of BGRES-1 miscalcu-lations which promoted the emergence of the situa-tion of environmental risk for the ecosystem of wa-ter object were allowed. Primary wind direction, natural current and circulating stream of cooling water lead to the congestion around right bank hav-ing water intake of state district power station, the pollution arriving with the rivers served the reason of reservoir’s eutrophication. At existing ways of preparation of reservoirs bed there are serious problems in the waterways of lower upstream; there is eutrophication, deterioration of sanitary and bac-teriological situation. Water heating in the reser-voirs-coolers leads to the deterioration of water quality characteristics.
reservoir cooler, water quality, hy-drochemical, hydrobiological indicators
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