Research Article
Multivariate Analysis of Confined Groundwater Hydrochemistry of a Long-Exploited Sedimentary Basin in Northwest China
Table 4
Loadings of variables on 4 significant varifactors (VFs) of water quality measurements.
| Variable | VF1 | VF2 | VF3 | VF4 |
| TDS | 0.97 | 0.16 | −0.11 | 0.07 | Cl | 0.90 | −0.13 | 0.05 | 0.25 | Na | 0.90 | −0.29 | −0.20 | 0.15 | | 0.85 | 0.18 | −0.17 | 0.12 | Ca | 0.78 | 0.25 | 0.21 | −0.26 | TH | 0.62 | 0.73 | 0.11 | −0.15 | HCO3 | 0.36 | 0.71 | −0.23 | −0.36 | K | 0.20 | 0.58 | 0.55 | −0.10 | Mg | −0.05 | 0.92 | −0.12 | 0.11 | F | 0.29 | −0.74 | −0.31 | −0.11 | NO3 | −0.14 | −0.05 | 0.85 | 0.06 | NH4 | 0.24 | 0.01 | 0.03 | 0.92 |
| Eigenvalue | 4.60 | 2.99 | 1.33 | 1.20 | % of variance explained | 38.3 | 24.9 | 11.1 | 10.0 | % cumulative variance | 38.3 | 63.2 | 74.3 | 84.3 |
|
|