Indicator

Component

1

2

3

DO

−0.762

0.489

−0.212

TN

0.062

0.959

0.042

TDN

0.737

0.597

−0.267

NH₃-N

−0.453

0.435

0.755

${\text{NO}}_3^{-}$ -N

0.743

0.361

−0.538

${\text{NO}}_2^{-}$ -N

−0.771

0.358

−0.160

TP

0.924

−0.015

0.264

TDP

0.825

0.288

0.457

${\text{PO}}_4^{3-}$

0.879

0.249

0.386

COD

0.820

−0.369

−0.400

Chl-a

−0.074

0.869

−0.259