Stable isotope analysis of the karst hydrological systems in the Bay of Kvarner (Croatia)

Marine Pollution Differentiation with Stable Isotopes of Groundwater

“…Here, we have used the Bakar Bay location primarily because of its feature as a closed bay contrary to the Kantrida relatively open sea location. The isotopic composition of the groundwater discharged into the sea in the Bakar Bay and in the Rijeka Bay has exhibited similar behaviour [16]. We have attributed their relatively constant isotopic composition to the baseflow.…”

“…Hydrogen has two stable isotopes: 1 H and 2 H. The lighter isotope: 1 H constitutes ≈ 99.985 % of the total stable hydrogen, while the remaining ≈ 0.015 % is the heavier isotope 2 H [20]. Oxygen has three stable forms: 16 O, 17 O and 18 O. The most abundant among them is the lightest one 16 O (≈ 99.76 %), while 17 O and 18 O are less commonly found in nature (≈ 0.035 % and ≈ 0.204 %, respectively) [20].…”

“…Oxygen has three stable forms: 16 O, 17 O and 18 O. The most abundant among them is the lightest one 16 O (≈ 99.76 %), while 17 O and 18 O are less commonly found in nature (≈ 0.035 % and ≈ 0.204 %, respectively) [20]. According to the number of stable hydrogen and oxygen species, there are nine different stable water configurations, and the most commonly occurring in nature are…”

Water resources analysis of the Rječina karst spring and river (Dinaric karst)

“…The first systematic analysis of the stable isotope composition of the complex karst hydrological systems in the broader area of the Rječina River catchment revealed that: (1) stable isotope composition of the spring water suggests the recharge is dominated by winter precipitation, (2) seasonal variations were not observed in the stable isotope composition of the precipitation, (3) the dual-porosity system is dominated by baseflow (a fissure-porous aquifer), (4) the hinterlands of the indi-vidual springs have different degrees of karstification, (5) stable isotope analyses of groundwater and precipitation suggests a meteoric origin of the groundwater, (6) the isotopic compositions of the baseflow and the rapid-flow components of springs within the Rječina River catchment (especially Rječina Spring) originate at higher elevations than the other springs located outside of the catchment (Mance et al 2014).…”

Changes of 2H and 18O abundances in water treated with non‐thermal atmospheric pressure plasma jet

“…Samples more abundant in heavy isotopes in comparison to the standards have positive δ values, while negative δ values are typical for samples less abundant in heavy isotopes than the standards. In hydrological studies, where water is used as a natural tracer, negative δ values are common, while in studies that use water as an artificial tracer (e.g., metabolic studies) samples are usually enriched with stable isotopes and their δ values are positive …”