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Table 8 The Factor loadings values and explained variance of water quality in two seasons (positive and negative strong correlations are marked bold)

From: Assessment of spatio-temporal variations of selected water quality parameters of Lake Ziway, Ethiopia using multivariate techniques

Dry season

Wet season

Parameters

PC1

PC 2

PC3

PC 4

Parameters

PC1

PC2

PC3

PC 4

TP

0.065

− 0.69

0.48

0.10

TP

0.92

− 0.18

0.21

0.23

PO4

0.93

− 0.16

0.13

− 0.03

PO4

0.15

− 0.18

0.85

0.37

NH3

0.907

− 0.04

0.27

− 0.11

NH3

0.85

− 0.38

0.32

0.05

NO2

0.966

0.10

− 0.07

− 0.09

NO2

0.88

0.09

− 0.33

− 0.15

NO3

0.963

− 0.04

− 0.21

0.10

NO3

0.90

− 0.005

0.03

− 0.34

TIN

0.98

− 0.01

− 0.17

0.06

TIN

0.94

0.03

− 0.14

− 0.235

TN

− 0.097

− 0.32

0.18

0.88

TN

0.56

0.68

− 0.28

0.20

SiO2

0.791

− 0.52

− 0.29

− 0.05

SiO2

0.11

− 0.10

− 0.62

0.49

Temp

0.283

0.79

0.43

− 0.09

Temp

− 0.11

0.19

0.63

− 0.62

DO

0.349

− 0.42

0.76

− 0.09

DO

0.08

0.55

0.64

0.40

PH

− 0.373

0.76

0.49

0.08

pH

− 0.85

0.13

0.01

− 0.17

EC

0.963

0.16

− 0.02

0.09

EC

− 0.25

0.96

− 0.07

0.03

TDS

0.955

0.17

− 0.05

0.08

TDS

− 0.26

0.95

− 0.087

0.03

SD

0.035

0.66

− 0.34

0.32

SD

0.61

0.58

− 0.21

− 0.16

TA

0.801

0.54

0.20

0.11

TA

0.44

0.63

0.43

0.03

Eigen value

7.97

3.05

1.66

0.96

Eigen value

5.84

3.60

2.52

1.26

% variance

53.133

20.34

11.09

6.41

% variance

38.93

24.02

16.76

8.39

% Cumulative variance

53.133

73.47

84.56

90.97

% cumulative variance

38.93

62.95

79.71

88.10