Use of the tracer tests for the assessment of the relationship between surface water and a drinking-water spring (Quincinetto, Turin)

The Montellina Spring is the main source of drinking-water supply of the City of Quincinetto (Turin). It is characterized by a high discharge, varying on average from 50 to 150 l/s (Sea Consulting & GDP, 2010). The Renanchio Stream is placed in the right watershed and likely feeding the Montellina Spring (Fig.1). The design of a derivation for an hydroelectric plant from the Renanchio Stream has required the execution of a hydrogeological study. This study allowed an analytical assessment of the hydrogeological relationship existing between the Renanchio Stream and the Montellina Spring.