Keywordsradium; radon; groundwater; coastal aquifer; stable isotopes; residence times; desorption rate constant; rainfall; stable isotopes; Mediterranean climate; water isotopes; moisture advection; condensation; climate proxies; precipitation; hydroclimate; global models; western U.S.; carbonate rocks; stable isotopes; groundwater/surface water relationships; groundwater recharge; USA; submarine groundwater discharge; SGD; environmental tracers; radon; radium; stable isotopes; multi-temporal thermal remote sensing; mine hydrology; stream tracers; fluorescent dye tracers; acid mine drainage; water isotopes; groundwater; reaeration; field tracer experiment; sulfur hexafluoride; xenon; alpine stream; dissolved oxygen; event and pre-event waters; hydrograph separation; subsurface stormflow; suspended sediment; riparian zone; managed aquifer recharge (MAR); groundwater flow and management; geochemical tracers; Orange County Water District (CA, USA); groundwater exploration; groundwater flow systems; fractured aquifer; environmental tracer; water isotopes; Italy; stable isotopes; groundwater recharge; Hualien River basin; environmental tracers; groundwater; stable isotopes; radioactive isotopes; water resource systems; water resources management
