Table 2 Results of the principal component analysis of the variables studied.
From: Evaluation of the water quality of an artificial inter-andean lake in northern Peru
PC1 | PC2 | PC3 | PC4 | PC5 | PC6 | |
|---|---|---|---|---|---|---|
Total | 5.58 | 3.88 | 3.15 | 2.26 | 2.45 | 2.08 |
Variance (%) | 20.68 | 14.38 | 11.68 | 9.78 | 9.07 | 7.69 |
Cumulative V. (%) | 20.68 | 35.06 | 46.74 | 56.52 | 65.59 | 73.28 |
Charges | ||||||
Chl a | −0.63 | 0.40 | −0.05 | 0.47 | −0.20 | 0.07 |
Chl b | 0.74 | 0.29 | −0.04 | −0.36 | −0.45 | 0.03 |
Chl c | 0.70 | 0.34 | −0.02 | −0.25 | −0.52 | 0.02 |
Temp | 0.09 | −0.20 | 0.89 | 0.01 | −0.02 | −0.12 |
pH | 0.26 | −0.79 | −0.05 | 0.20 | −0.15 | 0.10 |
E.C. | −0.25 | 0.31 | −0.51 | 0.10 | 0.02 | 0.08 |
DO | 0.31 | −0.78 | −0.01 | 0.29 | −0.07 | 0.13 |
Turbi | −0.17 | 0.24 | 0.56 | 0.26 | −0.27 | 0.52 |
TS | 0.39 | 0.00 | 0.04 | −0.02 | −0.13 | −0.36 |
TDS | 0.32 | −0.29 | 0.05 | 0.42 | 0.14 | 0.42 |
Alka | 0.62 | 0.27 | 0.05 | 0.28 | 0.50 | −0.37 |
Cl− | 0.64 | 0.13 | −0.11 | −0.21 | 0.37 | −0.20 |
Hard | 0.39 | −0.41 | −0.47 | 0.39 | −0.03 | 0.03 |
NO3− | 0.75 | 0.12 | 0.31 | 0.38 | 0.04 | −0.08 |
NO2− | −0.20 | −0.60 | 0.16 | −0.29 | −0.22 | −0.51 |
NH3 | −0.31 | 0.15 | 0.58 | −0.26 | 0.37 | 0.10 |
SO42− | −0.47 | 0.45 | 0.31 | 0.03 | −0.36 | −0.23 |
TP | −0.25 | −0.69 | 0.22 | −0.22 | −0.49 | 0.02 |
As | 0.09 | −0.19 | 0.32 | −0.67 | 0.14 | 0.43 |
Ba | −0.44 | −0.12 | −0.53 | 0.03 | 0.04 | −0.26 |
Cd | 0.71 | 0.20 | −0.05 | −0.31 | −0.48 | 0.10 |
Cu | −0.54 | 0.06 | 0.21 | 0.16 | 0.00 | 0.34 |
Hg | 0.18 | −0.11 | 0.03 | −0.57 | 0.70 | 0.12 |
Ni | 0.15 | 0.07 | −0.35 | −0.13 | −0.30 | 0.11 |
Pb | 0.15 | −0.06 | −0.51 | −0.21 | 0.10 | 0.71 |
Se | −0.59 | 0.36 | −0.34 | −0.43 | −0.11 | −0.05 |
Zn | −0.52 | −0.66 | −0.18 | −0.31 | −0.01 | −0.16 |
