GEOINFORMATION ASSESSMENT OF GROUNDWATER CONTAMINATION RISK WITHIN THE CHERNIGIV REGION
DOI:
https://doi.org/10.31471/2415-3184-2019-1(19)-59-68Keywords:
Landscape hydrogeological complex; aquifer; geodatabase; cartogram.Abstract
The purpose of the study is the spatial assessment of the risk for aquifer contamination within the administrative Chernihiv region using GIS technologies. The authors have proposed a geoinformation approach to determining the level of groundwater pollution risk for different aquifers, based on the allocation of the different types of landscape hydrogeological complexes within the studied area. The possible sources of the underground hydrosphere pollution, the impact of which can lead to emergencies associated with the contamination of groundwater, used for household drinking water supply, were discovered for the Chernihiv region. The structure of spatial and attribute data on hydrogeological zoning, aquifers vulnerability and potential sources of groundwater pollution has been developed with geoinformation software. Geodatabase creating allows to perform a special analysis and create thematic maps for the assessment and visualization of the emergencies risk as a result of groundwater contamination for different aquifers. The overlay analysis of cartographic layers of hydrogeological and administrative zoning and places of potential pollution sources localization was performed. The total risk of emergencies occurrence as a result of the unconfined and confined aquifers pollution within the administrative districts of the Chernihiv region was calculated. The obtained research results show that the north-western part of the territory of the Chernihiv region has the highest groundwater vulnerability to man-made impact (very high risk of contamination of the first from the surface unconfined aquifer). The territory of the south-eastern part of the region with well-protected aquifers can be used for the organization of background hydrogeological monitoring.
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