| 下降率 | 汛期(样本300个) | 非汛期(样本300个) | 全年(样本600个) | ||||||
| 变化范围 | 均值 | 标准偏差 | 变化范围 | 均值 | 标准偏差 | 变化范围 | 均值 | 标准偏差 | |
| GXL1 | 0.0~78.8 | 38.6 | 16.1 | 4.8~72.7 | 42.6 | 12.9 | 0.0~78.8 | 40.6 | 14.7 |
| GXL2 | 0.0~53.6 | 18.7 | 12.9 | 0.0~43.6 | 15.9 | 9.8 | 0.0~53.6 | 17.3 | 11.5 |
| GXL3 | 0.0~68.2 | 24.7 | 14.9 | 0.0~67.3 | 31.7 | 13.1 | 0.0~68.2 | 28.2 | 14.5 |
| PXL1 | 23.2~97.0 | 66.0 | 13.7 | 21.2~98.0 | 63.5 | 17.0 | 21.2~98.0 | 64.8 | 15.5 |
| PXL2 | 8.7~96.9 | 50.7 | 14.4 | 0.0~96.5 | 47.9 | 17.9 | 0.0~96.9 | 49.3 | 16.3 |
| PXL3 | 0.7~75.1 | 31.6 | 15.7 | 0.0~89.5 | 31.0 | 19.8 | 0.0~89.5 | 31.3 | 17.8 |