Studio idrogeologico della Valle di San Lucano

The hydrogeology of the Valle di San Lucano has been studied as part of a research on the hydrostructure of the Pale mountain group, which includes the Pale di San Martino, Croda Granda – Agner, Pale di San Lucano ridges. The research aimed to understand the regional hydrogeological setting, including recharge and discharge processes and the identification of groundwater flow paths. The study involved geological and structural mapping, discharge measurements of rivers and springs, water chemical analysis and a tracing test. The Valle di San Lucano is a deeply incised valley located at the eastern side of the Pale mountain group. Its main stream, the Tegnas Stream, is characterized by the highest mean discharge of the entire area. Groundwater outflows superficially through numerous loca lized springs or through diffuse springs emerging at the streambed. Results presented in this paper are referred to the 2014-2016 monitoring period, during which the main springs have been monitored for discharge and physical-chemical characteristics. A dye tracing test showed a slow connection between the Pale di San Martino karst plateau and the main spring, Fontane Angheraz. Small geochemical differences between the springs were also highlighted.