Karst Recharge Areas Identified by Combined Application of Isotopes and Hydrogeological Budget

The identification of recharge areas in karst aquifers allows us to perform sustainable management these groundwater resources. Stable isotopes (?18O and ?2H) have been largely used provide information about elevation many mountainous regions. In this paper, an improved version a recent “isotope-driven model”, for the areas, was applied Capodacqua di Spigno Spring (south Latium region). model upgrade consists preliminary check procedure estimate degree influence rainfall’s isotopic variability on spring water. This additional gives indication reliability its applicability conditions. Moreover, dataset updated analyze isotope-driven model. purpose study combine previously mentioned with hydrogeological tools. A quantitative basin, based estimation average monthly infiltration volume, performed by using inverse water budget. way, qualitative areas’ validated tool. Both models show that, mountain basins, decrease as elevations increase, including at high altitudes.