Hydrokarst\u2019s role in the knowledge of the Classical Karst aquifer\u2019s hydrodynamic (NE Italy, SW Slovenia).

In the framework of the Italian-Slovenian transboundary cooperation program 2007-2013, the HYDROKARST Project that aims at the protection and management of the Classical Karst transboundary aquifer is being carried out. Since the second half of 1800, several studies in this research field have been realized, but Hydrokarst is an opportunity for joint work for a unique goal, enriching the knowledge of a precious resource, water. In this context, in order to better define the groundwater flow dynamics, a joint monitoring network consisting of devices for continuous recording of physical parameters as electrical conductivity, temperature and water level, was realized. For selected water points, several physico-chemical, microbiological and geochemical surveys were performed. Major ions, \u3b418O and87Sr/86Sr isotopic ratio were analyzed. Fauna samples were collected. Additionally, a water-tracing test with fluorescent dye was carried out