Le aree di salvaguardia come strumento di protezione delle risorse idriche sotterranee nel nuovo contesto normativo: il caso del campo pozzi di Venaria-Borgaro (TO).

In the context of interventions focused on improving the accessibility to the new museums of Reggia di Venaria Reale (TO) the construction of a new road - including a bridge, an artificial tunnel and trenches - has been foreseen. The road intersects SMAT's well-field, that is strategic for the water supply of the municipality of Turin and represents the 22% of the total amount ofwater withdraws. The maximum productive potential of the entire area is 1,100 l/s. The annual average production is 970 l/s. In the area there are 85 wells, 48 in normally running, 28 for emergency conditions. 9 wells are not in function. Hydrogeological structure shows three distinct overlayered complexes. Complex I (Surface aquifer) with a water table connected with the surface drainage pattern, Complex II (Villafranchian aquifer) and Complex III (Pliocenic aquifer) with pressurized groundwater bodies. The new road reduces the land available for well-field and interferes directly with some wells and with the future generai withdraws' development. It determines groundwater pollution risk related to continue emissions on the subsurface land and in atmosphere caused by vehicle traffic and possible accidents. The lack of alternative traces for the road and the national and regional legislative acts required a delineation of wellhead protection areas with time-related capture zone criteria and re-localization for those wells with 60-days capture zone protection area interfering with the road. Other safety-measures are related to evacuation of platform water, the control of barrier effect for groundwater flow due to trenches and gallery and the instruments for dynamic protection with a specific qualitative and quantitative groundwater monitoring network.