Table 2.

Land use changes from 1980 to 2010 in the small Sanjiang plain.

Land use	Area (×104 hm2)			Land use change (%)
	1980	2000	2010	1980–2000	2000–2010	1980–2010
Cropland	262.19	346.62	434.82	32.20	25.45	65.84
Forest	222.57	215.18	182.83	−3.32	−15.03	−17.85
Grassland	24.62	23.12	2.09	−6.12	−90.96	−91.51
Wetland	171.74	95.63	56.29	−44.31	−41.14	−67.22
Building land	11.68	12.42	16.98	6.30	36.71	45.32
Wasteland	0.30	0.14	0.10	−53.17	−29.00	−66.75