The Cause of Drop of the Water Level of Underground Quaternary Aquifer of a Mine under Mining Influence

Table 6

Result of factor analysis.

Component	Factor 1	Factor 2
Na^++K^+	-0.056	0.976
Ca^2+	0.785	0.523
Mg^2+	0.843	0.338
Cl^-	-0.568	0.110
SO4^2-	0.457	0.881
HCO3^-	-0.811	-0.185
Character value	2.519	2.162
Variance explained rate	42.0%	36.0%