| Soil type | LRP | HFL | LBF | LHL | HL |
| Relative permeability class | Rapid | Rapid | Moderate | Moderate | Slow |
| Slope (%) | Relative runoff risk | ||||
| 0 - 8 | VL | VL | L | L | M |
| 8 - 13 | L | L | M | M | H |
| 13 - 20 | M | M | H | H | VH |
| >20 | H | H | VH | VH | VH |