| Parameter | Model range | Optimal range |
| Soil water capacity | 0 - high (mm) | 0 - 400 mm |
| Roo zone conductivity | Default = 20 mm | 10 - 80 mm |
| Deep conductivity | 0.1 - higher (mm/month) Default = 20 mm | Default = 20 mm |
| Runoff resistance factor | 0 - 1000 (default = 2) | 0 - 12 |
| Crop coeficient | Default = 1 | 0 - 0.989 |
| Preferred flow direction | 0 - 1 (Default = 0.15) | 0.3 - 0.8 |