Table 1. The description of each subsidence area.
| Subsidence | Lowest elevation (m) | Average elevation of sideline(m) | Area (hm2) | Maximum capacity (106 m3) | Hydraulic connection with river or lake |
|---|---|---|---|---|---|
| XQ | 17.0 | 23.4 | 1,633 | 46.8 | open |
| ZJ | 18.0 | 24.4 | 2,440 | 61.9 | open |
| GBGQ | 19.3 | 24.6 | 1,257 | 28.1 | closed |
| DJX | 21.0 | 23.0 | 469 | 5.7 | closed |
| DJD | 21.0 | 22.4 | 331 | 1.2 | closed |
| PYPS | 14.0 | 22.0 | 3,833 | 111.8 | open |
| PB | 17.8 | 22.1 | 867 | 11.8 | open |
The open subsidence areas have direct hydraulic connection with nearby rivers or lakes; the closed subsidence areas have no direct hydraulic connection with nearby rivers or lakes.