An Improved Uncertainty Measure Theory Based on Game Theory Weighting
Table 1
Classification standard of groundwater pollution risk evaluation index for abandoned mines.
Index
Risk level
High ()
Medium ()
Low ()
Pollution sources
(1) Mining area (km2)
≥100
30-100
≤30
(2) Mine drainage influence radius (km)
≥1.5
0.5-1.5
≤0.5
(3) Mine water yield (m3/h)
≥600 (northwest area ≥180)
180-600 (northwest area 90-180)
≤180 (northwest area ≤90)
(4) Mine water quality complexity
Complex (pollutants type number ≥2; water quality index to be forecasted ≥6) (3)
Medium (pollutants type number 1-2; water quality index to be forecasted 1-6) (2)
Simple (pollutants type number =1; water quality index to be forecasted <6) (1)
(5) Mine water quality
V (3)
IV (2)
III or more (1)
Pollution channel
(6) The main water-bearing aquifer permeability coefficient in coal measures (m/d)
≥50
10-50
≤10
(7) The main water-bearing aquifer thickness in coal measures (m)
≥60
30-60
≤30
(8) Fault water conductivity
Strong (3)
General (2)
Inferior (1)
(9) Poor drilling number
≥6
3-6
≤3
(10) The relationship between rebound water and target aquifer
Rebound water>target aquifer (3)
Rebound water≈ target aquifer (2)
Rebound water<target aquifer (1)
(11) Relative location between target aquifer and abandoned mine
Front downstream (3)
Downstream side (2)
Upstream (1)
The hazard of the pollution receptors (target aquifer)
(12) Target aquifer sensitivity
Concentrated drinking water source (including built-in use, spare, emergency water source, in construction and planning of water sources) quasi-protected areas; in addition to concentrated drinking water sources, the nation or local government set ups other protection areas related to the groundwater environment, such as hot water, mineral water, hot springs, and other special groundwater resources’ protection area (3)
Concentrated drinking water source (including built-in use, spare, emergency water source, in construction and planning of water sources), the recharge runoff area outside quasi-protected areas; the distribution area outside the special groundwater resources (such as mineral water, hot springs, etc.) and other areas of decentralized drinking water and other water is not included in the above sensitive environment (2)
