ESTIMATION OF THE GEOECOLOGICAL STATE OF THE LEFT INFLOWS OF THE DNISTER RIVER (MOHYLIV-PODILSKY SITE)

Abstract

The results of hydrochemical, lithogeochemical tests of surface waters, bottom sediments and soils of the coastal zone of the left inflows of Podolsk part of the Dnister river within the limits of Mogilev-Podolsky site are given. Among the investigated elements common to bottom sediments, water and soils from the banks of watercourses are Mn, Ni, Ti, V, Cr, Mo, Zr, Nb, Cu, Ba, Pb. The main attention is paid to the concentration of lead, chrome, manganese and copper in surface waters, bottom sediments and soils of the coastal zone of rivers Dnister, Zhvan, Karaets, Lyadova, Serebrya, Nemiia, Derlo. The content of the indicated elements there are less maximum permissible concentrations (MPC) of sanitary toxicological requirements and MPC of standard in water of the investigated reservoirs. In the soils and bottom sediments of the Dnister river, insignificant concentrations of most metals (at the average concentrations for river waters) were detected. The results of researches on the distribution of concentrations of chrome, lead, copper and manganesein water, bottom sediments of rivers and soils selected from their shores for better visibility are represent in the form of diagrams for each chemical element. Complex research of water, bottom sediments and soils of the coastal zone made it possible to obtain a coherent picture of the geoecological state of the rivers within their ancestral part. Taking into account that the content of the majority of investigated elements in watercourses does not exceed the MPC and answers to the average concentrations of metals in river waters of Ukraine, then it is possible to draw conclusion about the satisfactory state of reservoirs and the catchment area. It has been found that such complex and systematic studies have not been carried out in the past, so it is not possible to compare the results with the results of research in previous years. Also sharply the problem of null information costs about the geoecological state of right inflows of Dnister (the territory of the Republic of Moldova) common to both countries of the transboundary water.