surface water quality

An assessment of the surface water state resources was provided, which included the analysis of the components of the salt composition, namely chlorides and sulfates. The trophic-saprobiological (ecological-sanitary) index was determined taking into account the absolute values of indicators: suspended substances, pH, phosphates, dissolved oxygen, BOD5. To determine the index of specific indicators of toxic action, the absolute values of the components were used: copper, zinc, oil products, etc.

The article focuses on examining the influence of fluctuations in annual precipitation amount on the quality of surface waters. Water quality was estimated with data on BOD, COD and phosphate–ion concentration within five selected regions of Ukraine. Analysis of the precipitation data (1991 – 2010) showed different regional trends. Using the statistics, determination of the interconnection between precipitation amount and water resources quality were done.