Main characteristics of water regime of the phreatic aquifer in Subotica municipality: Vojvodina, Serbia

Subotica municipality is situated in the Subotica-Horgoš sands in the Bačka loess plateau, the two geomorphological units made of the early Quaternary sediments of intergranular porosity which form the water collecting environment for the phreatic aquifer. Owing to this, the phreatic aquifer is developed within the whole study area. Because of incomplete database, primarily the lack of contemporary data of the phreatic water table depth from various measuring points, the main aims of the paper are restricted to defining basic characteristics of water regime of the phreatic aquifer in Subotica municipality and their causal connection with the dominant climatic factor. Special emphasis in the paper is given to the issue of inade­quate monitoring of water table depth in the study area, which is the result of insufficient coverage of the area with active monitoring wells. Actually, there are only 10 active monitoring wells in Subotica municipality, which are unevenly distributed in the study area. Such situation disables the studious approach in studying the water regime of the phreatic aquifer and estimating the exact directions of its outputs, which creates a significant problem that needs to be solved in the near future. .