An Assessment of Human versus Climatic Impacts on Jing River Basin, Loess Plateau, China

Table 5

LUC change matrix of the ZHS upstream area from 1980 to 2005 (in 1000 ha).

Year	LUC	2005 ()						1980; Total
		1 (forest)	2 (grassland)	3 (arable land)	4 (built-up land)	5 (wetland and water bodies)	6 (barren land)
1980 ()	1 (forest)	338.80	18.18	1.35	0.03	0.03	—	358.38
	2 (grassland)	32.99	1989.81	6.50	0.70	0.08	—	2030.08
	3 (arable land)	11.16	27.49	1843.06	9.06	0.10	0.28	1891.14
	4 (built-up land)	—	0.08	0.03	23.26	—	—	23.36
	5 (wetland and water bodies)	—	0.13	0.43	0.05	17.81	—	18.41
	6 (barren land)	—	—	0.18	—	—	0.05	0.23
2005	Total	382.95	2035.69	1851.54	33.09	18.01	0.33	4321.60

Note: is the value at the cross of row in 1980 and column in 2005. The symbols and denote the following: 1 = forest; 2 = grassland; 3 = arable land; 4 = built-up land; 5 = wetland and water bodies; 6 = barren land. represents the area within a category with no change if . The area of category in 1980 changed into category in 2005 if ; for example, there were approximately 18.9 thousand ha and 18.5 thousand ha arable land in 1980 and 2005, respectively, and approximately 18.4 thousand ha of land was always arable land without any change (). However, there were approximately 0.11, 0.27, 0.09 thousand ha of arable land in 1980 converted into forest, grassland, and built-up land (, , and ), respectively, and approximately 0.013, 0.065, 0.00025, 0.004, and 0.002 ha of forest, grassland, built-up land, wetland and water bodies, and barren land changed into arable land (, , , , and ), respectively.