Pysanko Y. Features of the structural and functional organization of technogenically modified water ecosystem of the mouth of the Irpin river

The dissertation presents the solution of the actual scientific and practical problem of research and improvement of the ecological state of technogenically altered aquatic ecosystem of the medium river. The personal monitoring the hydro ecological system of the mouth reach of the Irpin river during 2016–2018 was performed, the monitoring data of the state institutions for the years 2006–2018 were systematized and formalized. A retrospective database of quantitative and qualitative condition of the studied mouth reach of technogenically altered aquatic ecosystem with more than 1000 indicators was formed. The change in concentrations of pollutants in the Irpin river flow towards the mouth is shown. The causes and consequences of degradation of the studied hydro ecological system were clarified. For the research of technogenically altered aquatic ecosystem is used the integrated system of environmental control indicators. A feature of the system of indicators is the three-dimensional orientation of the quantitative characteristics of structural and functional disorders of technogenically altered aquatic ecosystems. With their help, it is possible to quantify the effect of anthropogenic factors on the hydro ecological system, its condition and reaction, in accordance with the peculiarities of the development and functioning of technogenically altered aquatic ecosystems. The application of integrated systems of indicators allowed to investigate and quantify the main parameter of the functioning of the hydro ecological systems -environmental capacity. The obtained results provide the direction for the creation of water protection measures to improve the structural and functional organization of the mouth reach of the technogenically modified Irpin river. To this end, a comprehensive engineered building was developed – its operation is aimed at restoration of disturbed structural-functional characteristics of technogenic transformed hydro ecological system of small and medium-sized rivers. It is based on the combination of natural coastal vegetation and a modified design of artificial floating constructed wetland. The use of the constructed wetland improves the ecological condition of the river hydro ecological system, and developed integrated systems of indicators of ecological control allows to monitor the dynamics of structural and functional changes of aquatic ecosystems at the local level. Keywords: technogenic impact, aquatic ecosystems, pollutions, ecological indicators of control, constructed wetland, ecological capacity, Irpin river.