Table 2 Area and dynamic degree (K) of various land use/land cover (LULC) types from 1990 to 2020.
LULC type | Cultivated land | Forest land | Grassland | Water body | Construction land | Unused land | |
|---|---|---|---|---|---|---|---|
1990 | Area (hm2) | 369,621 | 228,611 | 2,484,147 | 205,497 | 16,232 | 1,729,175 |
% | 7.34 | 4.54 | 49.35 | 4.08 | 0.32 | 34.35 | |
2000 | Area (hm2) | 409,343 | 242,211 | 2,435,748 | 225,707 | 25,689 | 1,692,813 |
% | 8.14 | 4.81 | 48.41 | 4.49 | 0.51 | 33.64 | |
2010 | Area (hm2) | 504,667 | 241,860 | 2,364,064 | 240,585 | 29,468 | 1,653,245 |
% | 10.03 | 4.80 | 46.96 | 4.78 | 0.59 | 32.84 | |
2020 | Area (hm2) | 725,534 | 113,439 | 2,579,527 | 166,058 | 61,138 | 1,389,920 |
% | 14.41 | 2.25 | 51.23 | 3.30 | 1.21 | 27.60 | |
1990–2020 | K (%) | 3.21 | − 1.68 | 0.13 | − 0.64 | 9.22 | − 0.65 |
