Research Article
Environmental Risk Assessment System for Phosphogypsum Tailing Dams
Table 9
The weights of the factors and subfactors.
| | Fuzzy weight vector | Defuzzified weights |
| Characteristics of solid waste (A1) | | 0.112 | Characteristics of environment (A2) | | 0.108 | Tailing dam risk (A3) | | 0.176 | Risk management (A4) | | 0.209 | Utilization prospect (A5) | | 0.395 | Physical characteristic (B1) | | 0.256 | Chemical characteristic (B2) | | 0.744 | Natural environment (B3) | | 0.5 | Social environment (B4) | | 0.5 | Characteristics of dam body (B5) | | 0.598 | Drainage installation (B6) | | 0.201 | Flood drainage facility (B7) | | 0.201 | Risk prevention (B8) | | 0.650 | Emergency response (B9) | | 0.350 | Support of government (B10) | | 1/3 | Using proportion (B11) | | 1/3 | Technology maturity (B12) | | 1/3 | Volatility (C1) | | 0.100 | Solubility (C2) | | 0.274 | Radioactivity (C3) | | 0.626 | Corrosivity (C4) | | 0.104 | Acidity and alkaline (C5) | | 0.068 | Acute toxicity (C6) | | 0.470 | Extraction toxicity (C7) | | 0.358 | Air (C8) | | 0.053 | Soil (C9) | | 0.230 | Geology (C10) | | 0.403 | Hydrology (C11) | | 0.230 | Ecology (C12) | | 0.084 | Population density (C13) | | 0.291 | Industry (C14) | | 0.043 | Agriculture (C15) | | 0.088 | Tourism (C16) | | 0.088 | Animal husbandry (C17) | | 0.088 | Distance of community (C18) | | 0.402 | Seepage line and dry beach length (C19) | | 0.417 | Height and capacity (C20) | | 0.069 | Damming mode (C21) | | 0.188 | Type of tailings (C22) | | 0.069 | Service period (C23) | | 0.069 | Material of dam (C24) | | 0.188 | Returning reservoir (C25) | | 0.390 | Seepage shaft (C26) | | 0.390 | Drainage (C27) | | 0.220 | Flood discharge trench (C28) | | 0.5 | Flood draining facility (C29) | | 0.5 | Revetment construction maintenance (C30) | | 0.073 | Dam safety monitoring (C31) | | 0.175 | Daily management (C32) | | 0.291 | ISO authentication (C33) | | 0.461 | Emergency capacity of rescuing facilities (C34) | | 0.256 | Capacity of emergency protection and eliminating leak (C35) | | 0.744 |
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