Variable

PC 1

PC 2

PC 3

Tr

−0.235

−0.307

0.024

T

0.120

−0.080

0.882

S

−0.335

0.057

−0.262

DO

−0.157

−0.625

−0.050

COD

0.161

0.642

−0.043

DIN

0.404

−0.173

−0.210

NO₃

0.340

−0.149

−0.136

NO₂

0.381

−0.165

−0.222

NH₄

0.254

−0.085

−0.054

PO₄

0.363

−0.040

−0.070

Si

0.385

−0.068

0.171

Eigenvalue

5.15

1.948

1.084

Cumulative variance (%)

46.8

17.7

9.86