Warunki hydrogeochemiczne i podatność na zanieczyszczenie wód podziemnych w zlewni górnej Raduni

The paper presents results of long-term studies in the Kashubian Lake district that have been completed with data gathered over the lastfive years. The purpose of this research was to assess a temporal variability of groundwater chemical composition and to analyze risk of pollutant migration to subsurface water. Investigation indicates local, however, significant anthropogenic influence on a shallow aquifers.The assessment of shallow groundwater vulnerability to pollution has been performed with the use of DRASTIC method. The results revealed that about 60% of the catchment area is moderately high susceptible to pollution and 28% is potentially at high risk. The use of DRASTIC method has helped to explain the causes of a local contaminants in shallow aquifers.