Table 2.

The value of biological measure factor.

landuse	vegetation coverage (%)	B	landuse	vegetation coverage (%)	B
woodlands	0–20	0.100	grassland	0–20	0.450
	20–40	0.080		20–40	0.240
	40–60	0.060		40–60	0.150
	60–80	0.020		60–80	0.090
	80–100	0.004		80–100	0.043
Waters	—	0.000	flat ground	—	0.230
construction land	—	0.353	slope cropland	—	0.470