Land cover Class | 2017 (%) | 2019 (%) | 2021 (%) |
Built area | 7.89 | 9.31 | 12.25 |
Cropland | 39.54 | 28.72 | 21.28 |
Forest | 12.82 | 11.81 | 12.32 |
Grassland | 21.62 | 20.71 | 29.59 |
Bareland | 13.87 | 29.43 | 28.39 |
Water body | 4.24 | 4.37 | 4.88 |