Organizations: Environmental Isotopes Variables: alkalinity total_cell_concentration oxygen_saturation Substances: Nitrogen (InChI=1S/N2/c1-2) Oxygen (InChI=1S/O2/c1-2) Argon (InChI=1S/Ar) Nitrate (InChI=1S/NO3/c2-1(3)4/q-1) Keywords: noble gases riparian zone