oa The State of Groundwater within the Territory of the Tatarbunary Amalgamated Territorial Community of Odesa Region in the Context of Access to Sustainable and Safe Water Supply

Every year, the issue of provision and access of the population to drinking water of appropriate quality becomes more acute. Centralized water supply covers more than 99 percent of cities and only 30 percent of villages. The southwestern part of Odesa is no exception. Groundwater of various water-bearing complexes within the settlements of the Tatarbunary amalgamated territorial community is used by the population in the form of springs, draw-wells, and partially wells. In three settlements, water supply is carried out by aqueducts.

The results of monitoring observations are analyzed in this paper. The groundwater regime was studied in 9 settlements and the city of Tatarbunary. Groundwater levels were studied in 466 draw-wells and 6 wells. Manifestations of the harmful effects of water are recorded in 8 settlements, in planar indicators - in the range from 1.3 to 81 hectares.

On the basis of long-term observation data, maps of the groundwater level and exposed power were constructed using GIS technologies.

The work carried out helped to track the change in the level of the first aquifers from the surface within each of the ten settlements of the territorial community and to make forecasts regarding their further use and preservation.

The proposed approach, namely the analysis and construction of maps of the groundwater level and the exposed capacity within the settlements, will allow the leadership of the united territorial communities to minimize the costs of finding and restoring partial water supply, thereby reducing socio-economic stress and costs. The established results will make it possible to revise the volumes and mode of operation of water resources with the aim of bringing them to the norms of ecologically balanced water management.