| Parameter | PC1 | PC2 | PC3 | PC4 | PC5 | PC6 | PC7 | PC8 | PC9 | PC10 |
| Temp. (˚C) | 0.39 |
|
|
|
| −0.35 | −0.25 |
| 0.52 |
|
| Salinity (S‰) | 0.42 |
|
|
| 0.36 | 0.25 | 0.23 | 0.26 |
| −0.44 |
| pH |
|
|
|
|
| −0.37 |
|
|
| −0.80 |
| DO |
|
|
|
|
|
| 0.83 |
|
|
|
| Chl-a | −0.49 | −0.29 |
|
|
|
|
|
| −0.43 | 0.25 |
| TSM | 0.27 |
| 0.84 |
|
|
|
|
|
|
|
| NH4 | 0.86 |
|
|
|
|
|
|
|
|
|
| NO2 |
|
| 0.74 |
|
|
|
|
|
|
|
| NO3 |
|
| 0.25 | 0.29 |
|
|
| − 0.74 |
|
|
| TN |
|
| 0.75 | 0.27 | 0.28 |
|
|
|
|
|
| PO4 |
|
|
|
| 0.83 | −0.33 |
|
| 0.24 |
|
| TP |
|
|
|
| 0.90 |
|
|
|
|
|
| SiO4 |
|
|
| 0.86 |
|
|
|
|
|
|
| BOD |
|
|
| 0.75 |
|
|
|
|
|
|
| OM | −0.42 | 0.36 |
| 0.50 | 0.38 |
|
|
|
|
|
| COD |
|
| 0.24 |
|
|
|
| 0.88 |
|
|
| Fe |
|
|
|
|
| 0.66 | 0.27 |
|
| 0.24 |
| Mn |
| 0.74 |
|
|
|
| 0.32 |
|
|
|
| Cu |
|
|
|
|
| 0.25 |
|
| 0.77 |
|
| Zn |
| 0.55 | −0.34 | 0.47 | −0.28 |
|
|
|
|
|
| Cr |
|
|
|
|
| 0.84 |
|
|
|
|
| Ni |
| 0.75 |
|
|
|
|
|
|
|
|
| Cd |
|
|
|
|
|
| 0.80 |
|
|
|
| Pb | 0.70 | 0.30 |
|
| −0.24 | 0.24 |
|
|
| 0.24 |
| Hg |
| 0.70 |
| −0.27 |
|
|
|
|
| 0.44 |
| PHC | 0.76 |
|
|
|
|
|
|
|
|
|
| Variance% | 11.22 | 9.37 | 9.10 | 8.73 | 8.27 | 7.29 | 7.19 | 6.24 | 5.59 | 5.34 |
| Cumulative % | 11.22 | 20.59 | 29.59 | 38.42 | 46.69 | 53.99 | 61.18 | 67.60 | 73.19 | 78.53 |