Indicator

Component

1

2

3

DO

−0.181

0.171

−0.013

TN

0.032

0.302

−0.105

TDN

0.036

0.249

0.144

NH₃-N

0.172

0.013

−0.454

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

−0.051

0.215

0.300

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

−0.168

0.121

−0.027

TP

0.227

−0.024

−0.042

TDP

0.275

0.041

−0.175

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

0.261

0.041

−0.131

COD

−0.002

−0.038

0.307

Chl-a

−0.085

0.316

0.039