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Groundwater Ages of Confined Aquifer in Mishima Lava Flow, Shizuoka
三島溶岩流内地下水の年代について
1993
Journal of Groundwater Hydrology
三島溶岩流内地下水の年代について
This study focused on developing a tritium and helium -3 (3H-3He) dating method to survey the flow of groundwater in a large geohydrologic catchment area with groundwater basins including candidate disposal sites for wastes. The dating method is based on counting the increase of 3He produced by beta decay of tritium in groundwater. Precise detection of 3He is very difficult because the ratio of 3He to 4He is generally less than 10-6 for 10-8 ccSTP of helium dissolved in one gram of groundwater.
doi:10.5917/jagh1987.35.201
fatcat:ml3k2wggzndjtd7h76frapjzza