| Item | Unit | Value | Remark |
| Leaching rate (α) | 1 day−1 | 0.043 | Calibration |
| Rain concentration (Cpre) | kg∙m−3 | 1.05 | Reference [9] |
| Crops absorption (F) | kg∙day−1∙ha−1 | 0 - 1 | Reference [10] |
| Nitrogen removal coefficient (a) |
| 1.1 × 10−5 | Reference [11] |
| Nitrogen removal coefficient (b) |
| 0.5 × 10−2 | Reference [11] |