Table 5 Multiple linear regression model.
Independent variables | β | Sig | VIF |
|---|---|---|---|
Elevation (x1) | − 0.587 | 0 | 1.755 |
Slope (x2) | − 0.079 | 0 | 1.044 |
Distance to main river (x4) | − 0.494 | 0 | 1.914 |
Distance to tributary (x5) | − 0.079 | 0 | 1.036 |
Distance to national highway (x6) | − 0.200 | 0 | 1.007 |
Distance to provincial highway (x7) | − 0.055 | 0 | 1.003 |
Distance to county-level road (x8) | − 0.291 | 0 | 1.000 |
Distance to town-level road (x9) | − 0.021 | 0 | 1.000 |
River network density (x10) | − 0.341 | 0 | 3.141 |
Road network density (x11) | 0.358 | 0 | 3.018 |
Cultivated land area (x12) | 0.153 | 0 | 1.049 |
Radiation of prefecture-level city (x14) | 0.098 | 0 | 1.011 |
Radiation of county-level city (x15) | 0.034 | 0 | 1.948 |
Constant | 27.615 | 0 |
