Analysis of the Changes in the Water Yield Coefficient over the Past 50 Years in the Huang-Huai-Hai River Basin, China

Table 2

Area of different LUC types in various type regions.

Classification	Land use type	Average area (km^2)	Average proportion (%)
	1: arable land	27337	18.14
	2: woodland	3686	2.45
	3: grassland	82239	54.56
	4: water	3592	2.38
	5: urban land	3253	2.16
	6: unused land	30630	20.32
	SUM	150736	100.00
	1: arable land	103399	27.17
	2: woodland	48223	12.67
	3: grassland	187406	49.25
	4: water	6310	1.66
	5: urban land	5413	1.42
	6: unused land	29801	7.83
	SUM	380552	100.00
	1: arable land	199367	44.03
	2: woodland	88983	19.65
	3: grassland	126654	27.97
	4: water	8097	1.79
	5: urban land	23947	5.29
	6: unused land	5725	1.26
	SUM	452773	100.00
	1: arable land	132504	54.93
	2: woodland	32208	13.35
	3: grassland	43039	17.84
	4: water	5924	2.46
	5: urban land	22106	9.16
	6: unused land	5453	2.26
	SUM	241234	100.00
	1: arable land	139954	72.49
	2: woodland	14465	7.49
	3: grassland	7570	3.92
	4: water	10558	5.47
	5: urban land	20401	10.57
	6: unused land	111	0.06
	SUM	193059	100.00