| 矢木沢ダム | 05/18 |
| 貯水率(%) | |
| 12時間履歴 | ||
| 17:00 | 99.1 | - |
| 16:00 | 99.0 | - |
| 15:00 | 98.8 | - |
| 14:00 | 98.7 | - |
| 13:00 | 98.7 | - |
| 12:00 | 98.6 | - |
| 11:00 | 98.6 | - |
| 10:00 | 98.6 | - |
| 09:00 | 98.6 | - |
| 08:00 | 98.6 | - |
| 07:00 | 98.6 | - |
| 06:00 | 98.7 | - |
| 2時間履歴(10分) | ||
| 17:30 | 99.1 | - |
| 17:20 | 99.1 | - |
| 17:10 | 99.1 | - |
| 17:00 | 99.1 | - |
| 16:50 | 99.1 | - |
| 16:40 | 99.1 | - |
| 16:30 | 99.1 | - |
| 16:20 | 99.0 | - |
| 16:10 | 99.0 | - |
| 16:00 | 99.0 | - |
| 15:50 | 98.9 | - |
| 15:40 | 98.9 | - |