Table 1.

The indicator system used for sub-division of center Hunan hilly soil conservation and living environmental protection section.

Target	Elements	Index	weigh
Central Hunan hilly soil conservation and living environmental protection section soil and water conservation regionalization	soil erosion risk	surface fluctuation	0.10
		gully density	0.11
		perennial average rainfall	0.22
		vegetation coverage	0.08
		population density	0.07
		urbanization rate	0.14
		GDP per capita	0.10
		cultivated land ratio	0.11
		construction land ratio	0.07
	soil erosion intensity	light erosion area ratio	0.14
		moderate erosion area ratio	0.13
		intensity erosion area ratio	0.12
		extreme intensity erosion area ratio	0.31
		drastic erosion area ratio	0.30
	ecosystem service value	purify the environment	0.20
		soil conservation	0.21
		nutrient maintain	0.21
		biodiversity conservation	0.20
		hydrological adjusting	0.18