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