Analisi spazio-temporale della qualità di base delle acque sotterranee della pianura modenese

The most recent Italian laws, related to water management, state that groundwater constitutes a public property and drinkiug water use has the highest priority, They also fix tbe Maximum Allowable Concentration and the Guide Value for water destined to human consumptìon. Considering these limits and choosing four chemical and physìcal pararneters and four undesirable substances, the values sampled in a groundwater system can be elaborated in order to characterize and map tbree different zones of tbe aquifer in accordance with the basic water quality. The considered parameters are among the most representative of natural qualìty and extensive anthropogenic conrarnìnarion in groundwater and, at the same time, are easily measurable, In this paper an application of the classification metbodology to tbe aquifer of Modena Plain (Northero Italy) is reported. The monitoring network of tbe water quality is madc up by about 190 wells evenly distributed on an area of about 1.200 knr', The study has been repeated on data collected in two seasons (spring and autumn) of 1993-94-95. The results show a modest variability of the qualitative levels of the groundwater system in good accordance with tbe observed quasi-stationarity of the flow conditions.