Vulnerability of the groundwater to nutrient pollution of a county in the South-Eastern of Romania

This paper presents a functional model for the investigation of the groundwater quality expanded to the size of the county from the South-Eastern of Romania, considered as a case study. Were followed a several steps: defining the area of the study, establishing the methodology of the investigation (the sampling method and the quality indicators), the design of the experimental field, the applied methodology and finally getting a functional geochemical model of the groundwater of the entire county. Were determined for each groundwater sample a total of 17 physical and chemical quality indicators. Each sampling point was located with a GPS receiver, so all the results are a georeferenced database for the entire county. We have mapped the distribution of the pollutant concentrations to a number of relevant nutrient pollution category and a map of the "nitrates"
indicator, the pollutant with the highest amplitudes of the concentrations recorded.