Dynamic Changes Analysis and Hotspots Detection of Land Use in the Central Core Functional Area of Jing-Jin-Ji from 2000 to 2015 Based on Remote Sensing Data

Table 1

Land use type structure in central core functional area of Jing-Jin-Ji.

Land category		2000	2005	2010	2015
Arable land	Area (km^2)	27964.13	27300.68	26496.46	25612.27
	Proportion (%)	49.39	48.22	46.80	45.24
Forest land	Area (km^2)	11761.77	11731.70	11547.78	11520.04
	Proportion (%)	20.77	20.72	20.40	20.35
Grass land	Area (km^2)	6638.89	6593.44	6340.99	6135.64
	Proportion (%)	11.73	11.65	11.20	10.84
Water body	Area (km^2)	3160.18	2942.69	2440.62	2644.09
	Proportion (%)	5.58	5.20	4.31	4.67
Built-up land	Area (km^2)	6987.65	7963.80	9774.07	10688.97
	Proportion (%)	12.34	14.07	17.26	18.88
Unused land	Area (km^2)	102.68	82.97	13.28	12.77
	Proportion (%)	0.18	0.15	0.02	0.02