河川の取り組み
River Project
第2回由良川水系流域委員会資料
2.その他 参考資料について
6.水質経年変化
●BOD75%値(下流)

●BOD75%値(中流)

●BOD75%値(上流)


●BOD75%値(中流)

●BOD75%値(上流)

●各年のBOD75%値
| 河川名 | 由良川 | 由良川 | 由良川 | 由良川 | 土師川 | 由良川 | 由良川 | 由良川 |
|---|---|---|---|---|---|---|---|---|
| 観測地 点名 |
由良川橋 | 波美橋 | 筈巻橋 | 音無瀬橋 | 土師橋 | 以久田橋 | 山家橋 | 安野橋 |
| S47 | 1.0 | 2.0 | ||||||
| S48 | 1.3 | 1.4 | 1.1 | 0.9 | ||||
| S49 | 2.3 | 1.4 | 1.6 | 1.8 | 2.4 | |||
| S50 | 1.2 | 1.4 | 1.8 | 1.6 | 1.5 | 0.9 | 0.8 | |
| S51 | 1.3 | 1.6 | 1.4 | 1.2 | 1.4 | 1.0 | 0.7 | 1.5 |
| S52 | 1.2 | 0.9 | 1.0 | 1.0 | 1.2 | 1.4 | 0.8 | 1.3 |
| S53 | 1.2 | 0.9 | 1.2 | 1.2 | 1.3 | 1.1 | 0.8 | 1.6 |
| S54 | 0.8 | 1.1 | 1.1 | 1.1 | 1.0 | 0.8 | 0.6 | 1.6 |
| S55 | 0.9 | 1.1 | 1.0 | 1.0 | 1.1 | 0.8 | 0.8 | 1.4 |
| S56 | 1.1 | 1.9 | 1.4 | 1.1 | 1.8 | 1.1 | 0.8 | 0.6 |
| S57 | 1.0 | 1.0 | 1.1 | 0.9 | 0.9 | 0.9 | 0.7 | 1.2 |
| S58 | 0.9 | 1.1 | 1.0 | 0.9 | 1.0 | 0.8 | 0.6 | 1.2 |
| S59 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.2 | 0.8 | 0.6 |
| S60 | 0.7 | 0.9 | 0.7 | 0.8 | 0.7 | 0.7 | 0.7 | 0.6 |
| S61 | 0.9 | 1.0 | 1.0 | 1.1 | 0.9 | 0.9 | 1.4 | 0.6 |
| S62 | 0.7 | 0.6 | 1.1 | 0.8 | 0.8 | 0.6 | 1.1 | 0.6 |
| S63 | 0.7 | 0.7 | 0.9 | 0.7 | 0.8 | 0.6 | 0.8 | 0.5 |
| H1 | 0.7 | 1.1 | 1.0 | 0.9 | 1.0 | 0.9 | 0.7 | 0.6 |
| H2 | 1.0 | 1.0 | 1.1 | 0.9 | 0.8 | 0.8 | 0.7 | 0.5 |
| H3 | 0.6 | 0.7 | 0.7 | 0.7 | 0.7 | 0.6 | 0.7 | 0.5 |
| H4 | 0.8 | 0.9 | 0.9 | 0.7 | 0.9 | 0.7 | 0.8 | 0.7 |
| H5 | 0.9 | 0.9 | 0.9 | 1.0 | 0.8 | 0.9 | 0.9 | 0.5 |
| H6 | 1.1 | 1.5 | 1.7 | 1.0 | 1.2 | 1.3 | 0.9 | 0.6 |
| H7 | 0.8 | 1.0 | 1.1 | 0.8 | 1.0 | 1.0 | 0.9 | 0.6 |
| H8 | 0.7 | 0.8 | 0.9 | 0.7 | 1.0 | 0.8 | 1.6 | 0.5 |
| H9 | 0.7 | 0.7 | 0.7 | 0.8 | 0.8 | 0.8 | 1.2 | 0.5 |
| H10 | 0.6 | 0.7 | 0.8 | 0.7 | 0.7 | 0.7 |
