Natural SciencesEarth SciencesHydrologyGeochemistryGroundwater HydrologySubsurface Fluid FlowAquifer FlowGroundwater FlowGroundwater Flow In SoilsGroundwater GeochemistryGroundwater Isotope StudiesIsotope HydrogeologyGroundwater Flow PathwaysIsotope Migration In GroundwaterRadiocarbon Dating Of Groundwater