Russian Federation
Russian Federation
Russian Federation
UDC 551.4
Purpose. The study is purposed at identifying the characteristic features of content of dissolved forms of macrocompounds and nutrients in the river estuarine areas of Bolshoi Sochi (Sochi, Matsesta, Khos-ta, Kudepsta and Mzymta). Methods and Results. The surface water samples were taken in the river estuaries of Sochi, Matsesta, Khosta, Kudepsta and Mzymta rivers in early November during the autumn-winter flood season. The concentrations of nutrient compounds were determined by the spectrophotometric methods and those of macrocompounds – by the capillary electrophoresis one. Distribution of water hydrochemical character-istics corresponds to the classical pattern typical of the river-sea system. Chemical composition of water in the rivers is of the hydrocarbonate-calcium type, except for the Matsesta River where the composition is mixed. The highest concentrations of nitrogen compounds were revealed in the rivers Matsesta and Kudepsta, and those of phosphates – in the Sochi River. The Kudepsta River water is characterized by the abnormally high values of total alkalinity. As for the domestic water use, the measurements of nutri-ent compounds have shown no excess of their maximum permissible concentrations. Conclusions. Water chemical composition in the river mouths under study is conditioned by the impact of natural and anthropogenic factors. For the Matsesta River, the key natural factor is the discharge of mineral groundwater, whereas the anthropogenic factor is the wastewater discharge. The combination of these factors and the mouth overlap resulted in the development of eutrophication processes. For the Kudepsta River, the high background alkalinity value is of natural origin, but the increased concentra-tions of nutrients (nitrogen and phosphorus) are associated with intensive construction activities in the mouth area.
mouth area, Black Sea, Bolshoi Sochi, anthroogenic impact, chemical composition of water, nutrients, hydrochemical composition, macrocomponents
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