Table 2 Risk level of hazard indicators.
From: Risk assessment of land subsidence in Shanghai municipality based on AHP and EWM
Indicators | Very low | Low | Medium | High | Very high |
|---|---|---|---|---|---|
Elevation (m) | < 2 | 2–8 | 8–14 | 14–20 | >20 |
Land subsidence rate (mm/a) | < 3 | 3–6 | 6–9 | 9–12 | >12 |
GW extraction intensity (104m3/km2) | < 20 | 20–40 | 40–60 | 60–80 | >80 |
