The study concerns the hydrogeology of the Verzegnis group Mt. (Western Carnian Prealps). To define the hydrogeological characteristics of the lithology and the water drainage conditions, geological surveys were conduct also in caves. In the studied area 26 springs were identified. The most important of which were investigated for a two years period (2003 – 2004). Water temperature, water conductivity and discharge measures were monthly performed. To determine hydrochemical characteristics, δ18O and radon concentration, water samples were monthly collected. δ18O values were measured also on precipitations collected during the monitored period in three collection sites. The data obtained permitted to have a preliminary characterization of drainage networks relative to the most important springs fed by Verzegnis Mt. hydrostructure.
