Table 4. Comparison of the optimized land use structure and land use in 2010.

Land use type	Land use area (km2)			Vegetation carbon storage (104t)
	2010	2030	Changes	2010	2030	Changes
Cropland	63935.24	52954.74	−10980.50	3535.62	2928.40	−607.22
Woodland	3126.75	4406.75	1280.00	841.41	1185.86	344.45
Grassland	935.28	1268.61	333.33	30.12	40.85	10.73
Water area	15825.84	15825.84	0.00	0.00	0.00	0.00
Built-up land	20060.67	29643.51	9582.84	264.80	391.29	126.49
Unused land	215.67	0.00	−215.67	0.00	0.00	0.00
Total	104099.45	104099.45	0.00	4671.94	4546.40	−125.55