UDC 528.94

V. Ostroukh, O. Ostroukh

Features of geoinformation analysis and cartographic modeling changes in the chemical composition of underground water

      The peculiarity of the method of processing the initial hydrogeological data on the basis of geoinformation technologies and testing it on the example of spatial and temporal changes in the indicators of groundwater chemical composition within the Chop-Mukachevo section with the use of statistical analysis, cartographic modeling and spatial analysis in GIS, based on which, are detected spatially – time patterns of mineralization change and components of the chemical composition of groundwater for a long period of exploitation. The starting point for these studies was the results of a chemical analysis of water samples of centralized, individual water intakes and single wells that exploit the groundwater aquifer. Based on the original data, the author formed a specialized geoinformation database of the chemical composition of groundwater, a choice of cartographic projection was made and geocoding of the data of the chemical composition of groundwater was carried out. With the use of GIS technologies, conditions for the formation of chemical composition were studied. An analysis of the built-up surface of changes in the value of mineralization shows that almost all the research area has undergone an increase in mineralization (95% of the total territory of the study), caused both by natural geological processes and anthropogenic loading, and sometimes – by one and another time. It is obvious that areas with high mineralization spatially coincide with areas that are characterized by high rigidity and high content of chloride ions. They occur in 40% of the research area and are distributed locally in the cities of Uzhhorod, Mukachevo, Chop, Berehove, which indicates permanent anthropogenic pollution of the groundwater aquifer. By applying geoinformation technologies in the process of processing hydrogeological information, we can increase the efficiency of work, reduce the time and material costs of their implementation.
      The method presented and tested on the example of spatial and temporal changes in the parameters of the groundwater chemical composition within the Chop-Mukachevo section method proves that the creation of databases, which will allow to carry out hydrogeological research on the basis of modern geographic information software with a high degree of accuracy and accuracy.
      Keywords: geoinformation analysis, statistical analysis, cartographic modeling, digital maps, geocoding, groundwater, spatial and temporal changes.

Received at editorial Juny 4, 2019