| Classes | Area (Km2) | Percentage (%) |
| 1 Very high (MA) | 0.23 | 0.12 |
| 2 High (A) | 1.77 | 0.88 |
| 3 Average (M) | 11.4 | 5.70 |
| 4 Low (B) | 7.53 | 3.77 |
| 5 Very weak (MB) | 179 | 89.53 |