| K range | Area | |
| Km2 | Percent (%) | |
| K £ 0.1 | 89.04 | 40.14 |
| 0.1 < K £ 0.2 | 9.61 | 4.33 |
| 0.2 < K £ 0.3 | 78.21 | 35.26 |
| 0.3 < K £ 0.4 | 44.96 | 20.27 |
| Total | 221.82 km2 | 100 |