Table 9 Characteristic values and contribution rates of main factors.

From: Identification of mine water sources using a multi-dimensional ion-causative nonlinear algorithmic model

Principal factor

Initial eigenvalue

Extracting the eigenvalues of the sum of squares

Total

Variance contribution rate (%)

Accumulated contribution rate (%)

Total

Variance contribution rate (%)

Accumulated contribution rate (%)

Y1

3.42

56.998

56.998

2.72

45.408

45.408

Y2

1.45

24.165

81.163

81.16

30.961

76.369

Y3

0.93

15.498

96.660

1.21

20.291

96.660

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