ENVIRONMENTAL CHARACTERISTICS OF THE SLAVKA AND THE OPIR RIVERS ON THE TERITORY OF SLAVSK ( LVIV REGION)

Abstract

Introduction. The problem and deterioration of the water quality the source of drinking water and the basis of life on the planet which is becoming threatening today – is the threat to humanity. In 30 years, half of the Earth's population will suffer from water scarcity. In Ukraine it may occur much earlier, and for residents of 1,228 cities and town of Ukraine that use imported water, it is already come. Today in Ukraine there is almost no water reservoirs that meet the requirements of water quality, ecological state and basic sanitary-chemical and microbiological indicators for making pure drinking water. Now, the problem of pollution of water bodies (rivers, lakes, seas, groundwater) is the most urgent, because everyone knows that water is a life. A sharp deterioration in the quality of water in the country's reservoirs was the result of pol-lution by chemicals waste, poisons, synthetic fertilizers and sewage. During plants operation, industrial wastewater is discharged into fresh water. The wasterwater content is rich in all kinds of heavy metals (zinc, cadmium, mercury, lead, copper). In fact, in all reservoirs the concentration of pollutants exceeds the pollution standards. The annual data obtained by the bodies of the State Agency for Water Resources of Ukraine indicate that the content of highly oxidizable pollutants in water is high. Therefore, the study of environmental factors of pollution of reservoirs is currently a topical issue. Purpose. The purpose of the work is the ecological characterization of the water quality of the Slavka and the Opri rivers in Slavske of Lviv region. Methods. Hydrochemical investigations of the river Slavka and the Opir were used in the work. Results. The results indicate that surface waters are pH neutral of calcium carbonate content, which is characteristic for the investigated area. No significant changes in the water content are observed along the river, except for a slight increase in the Na + and Cl– content. All samples of the river Opir showed the high content of ammonium, indicating that the sewage flows into the river. The amounts of inorganic compounds of nitrogen, phosphorus, organic matter do not ex-ceed the MPC, are sufficiently saturated with oxygen. The low concentrations of the studied components are apparently due to the fact that the river flows over a long distance in the mountainous area and has a high self-cleaning ability. Conclusion. The waters of the rivers Slavka and the Opir of Slavske cannot be the collectors of pollution of an-thropogenic origin. Chemicals accumulating in reservoirs cause significant environmental changes that ultimately affect humans. Among the problems the humanity facing today are social, environmental, food, energy and water problems.