Bezsonnyi V. The increasing of environmental safety of surface water sources by improving the basin water management principle

The topical scientific and practical problem of increasing the ecological safety level of surface water sources has been solved in the thesis. Methodical support of effective implementation of optimal forms of environmental safety management at river basin level has been developed. The calculated values of the complex index of water pollution testify to the constant and stable impact of sewage from the Izyum municipal industrial water and sewage plant on the ecological state of the Siverskiy Donets River. The choice and use of the indicator (signal) index of the ecological state of surface waters for predicting water pollution is scientifically grounded. It is proved that the concentration of dissolved oxygen in a reservoir with a sufficiently high reliability can be applied as an integral indicator of the ecological state of the aquatic environment. The mathematical model of the dynamics of indicator (signal) indicators of the surface waters ecological state has been improved. The model is supplemented with correcting coefficients, which allow to predict the ecological conditions of the reservoir with high accuracy and to evaluate the impact of technogenic-hazardous objects on surface waters. The possibility of long-term forecasting of the ecological state of reservoirs on the basis of observing the dynamics of changes in the parameters of biochemical consumption of oxygen, dissolved oxygen was theoretically substantiated and experimentally confirmed. Methodical support of crisis water monitoring, related to notification of emergencies, organization and conduct of observations of the ecological state of surface water bodies in case of emergency discharge of sewage, has been improved.