The analysis of the chemical composition of natural water bodies-receivers of drainage and discharge waters. It is shown that the background concentrations of salt-forming ions in water bodies exceed the Mpcrx, which indicates the dominant influence of surface runoff from the entire catchment area and underground feeding by mineralized sulphate groundwater on the formation of the quality of the water environment. The chemical composition of water extract from the soil from irrigated areas adjacent to reservoirs was studied on the example of semikarakorsky district of the Rostov region. The classification of irrigated soils (0-20 cm) adjacent to the reservoirs, the degree and type of salinity depending on the chemistry of salts, which showed that agricultural activity is accompanied by a transformation of the geo-ecological cycles of salt-ions, leading to soil salinization, increase of mineralization of drainage runoff and, as a consequence, water of small streams. Based on the study of the chemical composition of natural, groundwater and water quality in reservoirs, and soil adjacent to sewers the features of dynamics of the content of salt ions and the intensity of their migration in agroecosystems.
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