| 八ッ場ダム | 04/02 |
| 貯水率(%) | |
| 12時間履歴 | ||
| 09:00 | 46.7 | ▲ |
| 08:00 | 46.5 | ▲ |
| 07:00 | 46.3 | ▲ |
| 06:00 | 46.1 | ▲ |
| 05:00 | 45.8 | ▲ |
| 04:00 | 45.6 | ▲ |
| 03:00 | 45.4 | ▲ |
| 02:00 | 45.2 | ▲ |
| 01:00 | 45.1 | ▲ |
| 00:00 | 44.9 | ▲ |
| 23:00 | 44.8 | ▲ |
| 22:00 | 44.7 | ▲ |
| 2時間履歴(10分) | ||
| 09:10 | 46.7 | - |
| 09:00 | 46.7 | - |
| 08:50 | 46.7 | ▲ |
| 08:40 | 46.6 | - |
| 08:30 | 46.6 | - |
| 08:20 | 46.6 | ▲ |
| 08:10 | 46.5 | - |
| 08:00 | 46.5 | ▲ |
| 07:50 | 46.4 | - |
| 07:40 | 46.4 | - |
| 07:30 | 46.4 | ▲ |
| 07:20 | 46.3 | - |