Variables: alkalinity oxygen_saturation concentration Keywords: groundwater denitrification riparian zone Substances: Sulfate (InChI=1S/H2O4S/c1-5(2,3)4/h(H2,1,2,3,4)/p-2 Nitrogen (InChI=1S/N2/c1-2) Argon (InChI=1S/Ar)