| Land cover | 1988 | 2003 | 2018 | |||
| Area (ha) | % | Area (ha) | % | Area (ha) | % | |
| Bare soil | 343.10 | 19.73 | 519.07 | 29.84 | 539.74 | 31.03 |
| Sparse vegetation | 460.42 | 26.47 | 527.35 | 30.32 | 533.34 | 30.66 |
| Dense vegetation | 549.30 | 31.58 | 398.25 | 22.90 | 308.88 | 17.76 |
| Savanna | 386.48 | 22.22 | 294.63 | 16.94 | 357.34 | 20.55 |
| Total | 1733.3 | 100 | 1733.3 | 100 | 1733.3 | 100 |