Table 2.
Loads of 18 variables in three principal components.
| Eigenvalues | 8.92 | 4.33 | 2.46 |
|---|---|---|---|
| Cumulative (%) | 49.54 | 73.57 | 87.24 |
| Variable Factor | Factor 1 | Factor 2 | Factor 3 |
| pH | −0.25 | 0.07 | 0.89 |
| EC | 0.95 | −0.14 | 0.28 |
| DO | −0.82 | −0.32 | 0.36 |
| CODMn | 0.90 | −0.25 | 0.12 |
| BOD | 0.67 | −0.53 | 0.26 |
| NH3-N | 0.83 | −0.06 | −0.44 |
| Hg | 0.04 | 0.97 | −0.03 |
| Pb | 0.43 | 0.90 | −0.01 |
| COD | 0.97 | −0.08 | 0.18 |
| TN | 0.96 | −0.16 | -0.10 |
| TP | 0.94 | −0.11 | −0.30 |
| Cu | 0.65 | −0.19 | 0.50 |
| Zn | 0.07 | 0.97 | 0.17 |
| fluoride | 0.92 | −0.01 | 0.21 |
| As | 0.54 | 0.20 | 0.62 |
| Cd | 0.82 | 0.26 | −0.13 |
| Cr(Ⅵ) | 0.07 | 0.96 | 0.21 |
| FC | 0.44 | 0.24 | −0.53 |
Bold typeface: Strong correlation coefficient.