| Ratio of soil particle less than 0.075 mm | 0.976 | 0.462 | 1.343 | 0.181 |
| Ratio of soil particle less than 0.002 mm | 1.082 | 0.386 | −0.375 | 0.708 |
| Wet unit weight | 0.904 | 0.322 | −2.719*** | 0.007 |
| Void ratio | 1.760** | 0.025 | 0.855 | 0.396 |
| Permeability | 0.013*** | < 0.001 | −1.526 | 0.132 |
| Cohesion | 1.065 | 0.375 | 1.743* | 0.083 |
| Internal friction angle | 0.619** | 0.013 | −4.432*** | < 0.001 |
| Soil layer thickness | 0.424*** | < 0.001 | −0.380 | 0.704 |
| Weathered rock layer thickness | 0.172*** | < 0.001 | −8.850*** | < 0.001 |
| Bed rock layer thickness | 0.131*** | < 0.001 | −9.153*** | < 0.001 |
| Number of major anomaly zones | 0.557*** | < 0.001 | 2.127** | 0.034 |