Geochemistry of heavily exploited aquifers in the Emilia-Romagna region (Po Valley, northern Italy)
1998
Martinelli, G. | Minissale, A. | Verrucchi, C.
More than 5800 chemical analyses on water samples collected during 1987-1995 from 528 monitoring wells located in the southernmost part of the Po Valley (Emilia-Romagna region, northern Italy), one of the most urbanized, industrialized and agriculturally developed areas of Italy, have been processed. The analysis of data showed that: (1) waters are discharging from both confined and unconfined aquifers; (2) the water in the unconfined aquifer(s) is Ca(Mg)-HCO3 in composition while confined ones are Na-Cl and/or Na-(HCO3); (3) both confined and unconfined aquifer samples have delta18O and deltaD isotopic values of meteoric signature; (4) waters from both the aquifers are at least 40 years old; (5) the pumping rate has caused subsidence, particularly where the aquifer(s) is (are) unconfined; (6) the unconfined aquifer(s) is exposed to the risk of NO3 pollution; (7) considering the present "pressure" (i.e pumping rate) on this natural environment by human activity, care must be taken in the future to preserve this "strategic" resource.
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