Fig. 2

Spatial distribution of (a) Ca2+; (b) Mg2+; (c) Na+; (d) K+; (e) HCO3-; (f) NO3−; (g) SO42-; (h) Cl-; (i) pH; (j) EC; (k) Cd; (l) Cr; (m) Cu; (n) Fe; (o) Hg; (p) Mn; (q) Ni; (r) Pb; (s) Sr; and (t) Zn.

Spatial distribution of (a) Ca2+; (b) Mg2+; (c) Na+; (d) K+; (e) HCO3-; (f) NO3−; (g) SO42-; (h) Cl-; (i) pH; (j) EC; (k) Cd; (l) Cr; (m) Cu; (n) Fe; (o) Hg; (p) Mn; (q) Ni; (r) Pb; (s) Sr; and (t) Zn.