Research Article
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 | Pb2+ C2-1 | 0.397 | Zn2+ 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 |
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