Environmental Evaluation of Coal Mines Based on Generalized Linear Model and Nonlinear Fuzzy Analytic Hierarchy

Table 4

Importance of indicators at all levels to objectives.

First level index		Weight	Second level index	Weight
Soil quality indicators	C1	0.393	Pb C1-1	0.319
			Zn C1-2	0.103
			Cd C1-3	0.117
			As C1-4	0.104
			U C1-5	0.357
Water environmental quality	C2	0.385	Pb^2+ C2-1	0.397
			Zn^2+ C2-2	0.183
			COD C2-3	0.207
			BOD C2-4	0.213
Atmospheric environmental	C3	0.091	SO2 C3-1	0.238
			Rn C3-2	0.344
			CO C3-3	0.217
			TSP C3-4	0.201
Ecological compensation indicators	C6	0.131	Input intensity of pollution control C6-1	0.416
			Improvement of ecological early warning system C6-2	0.302
			Environmental protection investment/total income C6-3	0.282