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Table 5 Potential polluting sources and key water parameters influencing surface water

From: Assessment of surface water quality and monitoring in southern Vietnam using multicriteria statistical approaches

PCs

1

2

3

4

5

6

7

8

9

10

11

12

13

Temp

−0.19

0.31

0.05

−0.23

0.44

0.40

0.55

−0.29

0.25

0.04

0.07

−0.01

0.00

pH

−0.16

−0.01

0.43

0.56

−0.05

0.40

−0.07

−0.15

−0.19

−0.50

0.02

0.00

0.00

TDS

−0.22

0.46

0.15

0.16

0.00

−0.42

− 0.01

0.04

0.12

−0.02

0.01

0.02

0.71

EC

−0.22

0.46

0.14

0.17

0.00

−0.42

− 0.01

0.04

0.12

−0.02

0.01

0.02

−0.71

TSS

−0.33

− 0.25

0.24

0.26

0.11

0.23

−0.20

0.30

0.45

0.53

− 0.13

0.04

0.00

DO

0.44

0.19

0.19

− 0.06

− 0.01

0.11

− 0.09

0.07

0.18

−0.03

− 0.05

0.82

0.00

BOD

0.43

0.23

0.12

−0.01

0.09

0.10

−0.09

0.10

0.19

−0.11

−0.68

− 0.44

0.00

COD

0.32

0.05

−0.13

0.54

0.04

−0.07

0.13

−0.50

−0.18

0.53

−0.05

0.01

0.00

N-NH4+

0.42

0.17

0.30

−0.04

− 0.04

0.11

− 0.18

0.09

0.18

0.11

0.69

−0.37

0.00

NO2-N

−0.07

0.16

−0.63

0.17

−0.21

0.21

−0.33

−0.23

0.50

−0.21

0.09

0.01

0.00

N-NO3

−0.04

0.42

−0.27

0.14

−0.31

0.38

0.23

0.54

−0.33

0.19

0.01

0.00

0.00

Fe

0.24

−0.29

−0.18

0.40

0.18

−0.24

0.52

0.37

0.30

−0.27

0.13

−0.01

0.00

Cl

0.02

0.11

−0.25

0.11

0.78

0.02

−0.41

0.20

−0.28

−0.05

0.09

0.04

0.00

Eigen.

4.1

2.9

1.7

1.4

1.2

0.6

0.4

0.3

0.2

0.2

0.0

0.0

0.0

%Var.

31.8

22.4

13.2

10.5

9.3

4.6

3.1

2.1

1.5

1.2

0.2

0.0

0.0

C%Var.

31.8

54.2

67.4

77.9

87.3

91.8

95.0

97.1

98.6

99.8

100.0

100.0

100.0