AIH Professional Hydrologist — Groundwater Examination

Practice session

On a Piper trilinear diagram, a groundwater sample plots in the lower-left corner of the cation ternary triangle (near 100% Ca2+) and the lower-left corner of the anion ternary triangle (near 100% HCO3-), projecting into the left apex of the central diamond. What hydrochemical facies and hydrogeologic environment does this represent?

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