指标

Ca2+

Mg2+

Na+ + K+

${\text{HCO}}_3^{-}$

${\text{Cl}}^{-}$

${\text{SO}}_4^{2-}$

Ca2+

1

Mg2+

0.862

1

Na+ + K+

−0.564

−0.461

1

${\text{HCO}}_3^{-}$

−0.599

−0.503

0.968

1

${\text{Cl}}^{-}$

0.078

0.008

0.275

0.2

1

${\text{SO}}_4^{2-}$

0.718

0.751

−0.387

−0.471

0.092

1