The single-well method for determining the direction of flow of ground-water using a neutron source.
D001895:Boron; D002104:Cadmium; D055593:Geological Phenomena; D005844:Geology; D008094:Lithium; D009502:Neutrons; D011874:Radiometry; D014881:Water Supply
D002104:Cadmium; D008094:Lithium; D001895:Boron