| 降水阈值(mm) | 采样后样本数 |
| 无降水 | 2,724,136 |
| 0.1 | 1,869,286 |
| 1 | 1,050,201 |
| 5 | 426,027 |
| 10 | 212,528 |
| 15 | 122,916 |
| 20 | 75,308 |
| 30 | 30,543 |
| 40 | 12,124 |
| 50 | 6291 |
| 60 | 3260 |
| 70 | 1769 |
| 80 | 930 |
| 90 | 476 |
| 100 | 228 |