The dynamics of hydrochemical parameters such as nitrates, and orthophosphates of surface waters were analyzed. Based on the analysis of wide temporal monitoring data, of prognosis nitrates and orthophosphates of the surface waters were carried out.The purpose is an assessment of the state of the surface water by nitrates and orthophosphates hydrochemical parameters and their regression analysis.The object of research – was to determine nitrates and orthophosphates indicators of the river water state during 12 years.The regression analysis method using the Windows Excel CurveExpert software was used to determine the empirical dependencies and search for connections.Against the background of high regulation of the Inhul river basin (the presence of 770 ponds and an irrigation system on 33 hectares, water use is carried out by more than 20 enterprises) showed the periodic nature of changes in hydrochemical parameters. Based on the obtained functions, prognoses to 2030 on annual averages were developed. The study is the basis for determining the mathematical model of natural fluctuations of the research indicators. Regression analysis allows obtaining a sinusoidal dependence on the orthophosphates content, which demonstrates 13 years fluctuation (R = 0.90). We have an 11-year sinusoidal wave with a period of 10 years and fairly high representativeness (R = 0.85) for nitrate content. The determined sinusoidal dependences of the integrated indicators of water quality allowed determining the average time of fluctuations concerning the processes of self-organization of river waters, which is about 11 years, and confirms the theory of "waves of life". The surface waters of the river are capable of self-renewal and their hydrochemical status has not yet reached a critical point, after which irreversible changes in the river ecosystem may occur.

The problem of surface water is one of the key challenges of humanity. In accordance with the goals of research and analysis of the environmental status of water bodies are of great practical importance, as their condition further affects the quality of drinking water. The purpose of the work is to assess the environmental status of the water body. The originality of the obtained results is a comprehensive assessment based on the analysis of time monitoring data on the ecological status of water of the water body, taking into account the weighting factors of pollution indices. The study of the ecological state was carried out taking into account the integrated hydrochemical indicators. Microsoft Excel software was used to conduct the study. Google Maps was used to find places on maps and build the maps you needed to work. Microsoft Excel was used to perform calculations and build graphics. The ecological status of a water body is determined on the basis of pollution index calculations. The method of assessing the ecological status of surface waters by relevant categories has been improved through the use of weights. The assessment method is universal and can be used to study the ecological status of any water body. However, the selection of hydrochemical indicators took into account only the content of major pollutants, namely chlorides, sulfates, phosphates, suspended solids, petroleum products, compounds of copper and zinc violated. The obtained research results can be used in the development of water management plans and measures to improve their condition.

Large areas become unsuitable for full-fledged life after mining activity. To improve the state of environmental safety of post-industrial landscapes and the rational use of disturbed territories, a Decision Support System (DSS) should be created. This system should also contain proposals for restoring the soil cover and plant communities that are proposed in this article. The purpose of this study is to determine the influence of arbuscular mycorrhizal fungi on the process of vegetation formation in the post-industrial landscape of a sulfur quarry. During reclamation works in human-made ecotopes, vegetation has already formed there in a certain way due to natural succession processes. We assessed the level of vegetation self-restoration and, on the basis of the obtained data, the need and direction of phytoreclamation in relation to specific ecotopes. The set of restoration of soil cover and plant communities makes it possible to solve the problem of reusing post-industrial landscapes. The positive effect of the treatment of seedlings with a spore remedy of arbuscular, mycorrhizal fungi on the studied breeds’ height increase was observed. In the process of the revitalization of disturbed landscapes through the mycorrhization of planting material, there is a tendency to restore and increase phytodiversity at the floristic and coenotic levels.