Table 2 The PCs distinguished from the chemical characteristics of groundwater.

From: Determination of leachate leakage around a valley type landfill and its pollution and risk on groundwater

Variables

Factor 1

Factor 2

Factor 3

Factor 4

Factor 5

Depth

0.58

0.22

− 0.36

0.18

0.63

pH

− 0.11

− 0.77*

− 0.55

− 0.02

0.30

TDS

0.95**

0.25

− 0.04

− 0.16

− 0.02

Total hardness

0.99**

− 0.01

− 0.06

− 0.14

− 0.05

CODMn

− 0.10

0.20

0.96**

− 0.01

0.09

NH3–N

0.88**

0.41

− 0.07

0.24

− 0.02

Cl

0.29

0.92**

− 0.05

0.19

− 0.06

Hg

0.64

− 0.56

0.14

− 0.02

0.48

F

− 0.24

0.13

0.22

0.892**

0.28

Fe

− 0.07

− 0.10

0.99**

− 0.03

0.03

Mn

0.39

0.81*

0.42

− 0.08

− 0.02

Cu

0.01

− 0.03

− 0.29

0.928**

− 0.22

Zn

0.07

0.73

0.16

0.53

− 0.39

NO2–N

0.26

0.17

− 0.17

0.07

− 0.93**

NO3–N

0.16

0.95**

− 0.17

− 0.08

0.15

SO42−

0.93**

0.27

− 0.04

− 0.12

− 0.20

Eigenvalues % of variance

29.31

26.85

17.23

13.39

12.11

Cumulative %

29.31

56.16

73.39

86.78

98.89

  1. Significant values are in [bold].