Ionic ratio | Wet | Dry | Comment | Interpretation |
SO4/Cl | 0.06 - 1.62 | 0 - 3.15 | high | Additional sources of SO4 from weathering of sulfates |
Na/Cl | 0.00 - 0.04 | 0 - 0.21 | low | No Na-adsorption during freshening and a little silicate weathering |
Mg/Cl | 0.04 - 0.67 | 0 - 4.84 | high | Cation-exchange and silicate weathering of sandstones. |
Na/HCO3 | 0.00 - 0.04 | 0 - 0.05 | high | Substantial weathering of Na-feldspar or other Na-silicates |
Ca/HCO3 | 0.00 - 1.80 | 0 - 2.60 | high | Calc-carbonate dissolution or Calc-silicate weathering |
Ca/SO4 | 0.00 - 4.00 | 3.84 - 61 | high | Gypsum dissolution present |
Ca/Mg | 0.00 - 13.48 | 0 - 7.66 | high | Cation-exchange of weathering of silicate rocks. |
Ca + Mg/Na + K | 0.00 - 7.55 | 0.00 - 38.48 | high | Carbonate weathering |
HCO3/∑Anions | 0.00 - 0.11 | 0.00 - 0.08 | high | Weathering reactions and input of dissolved species in recharge area |
NO3/∑Anions | 0.00 - 0.01 | 0.00 - 0.00 | very low | No anthropogenic contribution |
SO4/∑Anions | 0.00 - 0.01 | 0.00 - 0.01 | very low | No oxidation of sulphides. |
Mg/Ca | 0.00 - 2.29 | 0.00 - 4.84 | low | Weathering of Silicate rocks |
Na/Na + Cl | 0.00 - 0.04 | 0.01 - 1.00 | high | Sodium source other than halite-albite, ion exchange |
Mg/Ca + Mg | 0.07 - 1.00 | 0.12 - 0.7 | high | Dolomite dissolution, calcite precipitation or saltwater |
Ca /Ca + SO4 | 0.00 - 0.86 | 0.46 - 1.00 | high | Calcium source other than gypsum |
Ca + Mg/SO4 | 0.39 - 11.30 | 0.00 - 675 |
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Na + K ? Cl/Na + K ? Cl + Ca | 0.10 - 1.00 | −0.61 - 0.61 | high | Plagioclase weathering unlikely |
Cl/∑Anions | 0.00 - 0.16 | 0.00 - 0.04 | low | Rock weathering |