| 矢木沢ダム | 05/15 |
| 貯水位(m) | |
| 12時間履歴 | ||
| 00:00 | 846.80 | ▲ |
| 23:00 | 846.77 | - |
| 22:00 | 846.77 | ▼ |
| 21:00 | 846.87 | ▼ |
| 20:00 | 846.98 | ▼ |
| 19:00 | 847.05 | ▼ |
| 18:00 | 847.16 | ▼ |
| 17:00 | 847.21 | ▼ |
| 16:00 | 847.23 | ▲ |
| 15:00 | 847.20 | ▲ |
| 14:00 | 847.17 | ▲ |
| 13:00 | 847.15 | ▲ |
| 2時間履歴(10分) | ||
| 00:30 | 846.81 | - |
| 00:20 | 846.81 | ▲ |
| 00:10 | 846.80 | - |
| 00:00 | 846.80 | - |
| 23:50 | 846.80 | ▲ |
| 23:40 | 846.79 | - |
| 23:30 | 846.79 | ▲ |
| 23:20 | 846.78 | - |
| 23:10 | 846.78 | ▲ |
| 23:00 | 846.77 | ▲ |
| 22:50 | 846.76 | - |
| 22:40 | 846.76 | ▲ |