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
■水質の状況一覧表■
注)値は、各年度のデータを平均したものBODは75%値ではありません。
出典:平成12年度由良川水質汚濁防止連絡協議会委員会資料
注)値は、各年度のデータを平均したものBODは75%値ではありません。
出典:平成12年度由良川水質汚濁防止連絡協議会委員会資料
年度 | 昭 和 | 平 成 | |||||||||||||||||||||||||||
地点名 | 河川名 | 項目 | 56 | ||||||||||||||||||||||||||
由良川橋 | 由良川 | 7.4 | 7.3 | 7.3 | 7.3 | 7.3 | 7.3 | 7.2 | 7.1 | 7.2 | 7.2 | 7.2 | 7.4 | 7.4 | 7.3 | 7.4 | 7.3 | 7.4 | 7.3 | 7.2 | 7.2 | 7.2 | 7.3 | 7.3 | 7.2 | 7.3 | 7.4 | 7.4 | |
10 | 10 | 10 | 9 | 10 | 10 | 10 | 10 | 9 | 9 | 10 | 9.2 | 9.4 | 9.5 | 9.4 | 9.7 | 9.2 | 9.2 | 9.4 | 9.6 | 9.6 | 9.1 | 9.6 | 9.9 | 9.6 | 9.6 | 9.6 | |||
1.5 | 1.5 | 1.0 | 0.9 | 1.0 | 0.9 | 0.8 | 1.0 | 0.9 | 0.8 | 0.8 | 1.2 | 0.7 | 0.8 | 0.6 | 0.7 | 0.7 | 0.8 | 0.6 | 0.8 | 0.8 | 0.9 | 0.6 | 0.7 | 0.6 | 0.6 | 0.7 | |||
8 | 11 | 8 | 9 | 7 | 7 | 8 | 6 | 8 | 6 | 7 | 10 | 9 | 5 | 6 | 6 | 6 | 6 | 5 | 8 | 7 | 4 | 4 | 3 | 3 | 3 | 4 | |||
2500 | 19000 | 3400 | 3600 | 1600 | 2800 | 3200 | 3900 | 2600 | 3500 | 6200 | 6700 | 4800 | 4600 | 1700 | 2500 | 2200 | 3900 | 5900 | 8500 | 10000 | 10000 | 11000 | 5000 | 5600 | 3400 | 3700 | |||
波美橋 | 由良川 | 7.4 | 7.4 | 7.3 | 7.3 | 7.5 | 7.3 | 7.1 | 7.2 | 7.1 | 7.2 | 7.3 | 7.3 | 7.3 | 7.3 | 7.2 | 7.5 | 7.4 | 7.3 | 7.3 | 7.1 | 7.4 | 7.4 | 7.4 | 7.3 | 7.4 | 7.4 | ||
10 | 10 | 10 | 10 | 9 | 9 | 10 | 10 | 9 | 10 | 8.5 | 9.5 | 10.0 | 8.6 | 9.4 | 8.5 | 8.7 | 8.9 | 8.8 | 9.0 | 8.7 | 9.2 | 9.4 | 10.1 | 10.3 | 10.2 | ||||
1.5 | 1.1 | 1.0 | 0.9 | 1.0 | 0.9 | 1.3 | 1.0 | 0.9 | 0.9 | 0.9 | 0.8 | 0.9 | 0.6 | 0.6 | 0.9 | 0.9 | 0.6 | 0.9 | 1.0 | 1.1 | 0.7 | 0.9 | 0.6 | 0.6 | 0.6 | ||||
11 | 12 | 6 | 7 | 9 | 11 | 7 | 10 | 10 | 10 | 7 | 9 | 6 | 6 | 5 | 8 | 5 | 5 | 7 | 12 | 4 | 4 | 6 | 5 | 4 | 4 | ||||
19000 | 8600 | 3600 | 3400 | 3300 | 8600 | 4400 | 4900 | 3500 | 8000 | 4500 | 8800 | 4900 | 1500 | 1700 | 7500 | 5100 | 15000 | 8700 | 26000 | 8100 | 40000 | 11000 | 9400 | 6400 | 6700 | ||||
筈巻橋 | 由良川 | 7.3 | 7.3 | 7.2 | 7.3 | 7.2 | 7.3 | 7.2 | 7.1 | 7.2 | 7.1 | 7.1 | 7.3 | 7.2 | 7.2 | 7.3 | 7.2 | 7.4 | 7.3 | 7.2 | 7.2 | 7.2 | 7.3 | 7.3 | 7.3 | 7.3 | 7.4 | 7.3 | |
11 | 10 | 10 | 10 | 9 | 10 | 10 | 11 | 10 | 9 | 10 | 9.5 | 9.6 | 9.9 | 9.8 | 10.2 | 9.6 | 9.7 | 9.9 | 10.1 | 10.2 | 9.3 | 10.3 | 10.7 | 10.1 | 10.4 | 10.3 | |||
1.4 | 1.5 | 1.2 | 1.0 | 0.9 | 1.0 | 0.9 | 1.0 | 1.1 | 1.0 | 0.8 | 0.9 | 0.8 | 0.9 | 0.7 | 0.7 | 0.9 | 0.9 | 0.6 | 1.3 | 1.0 | 1.3 | 0.9 | 0.8 | 0.7 | 0.7 | 0.7 | |||
6 | 10 | 9 | 6 | 7 | 6 | 10 | 6 | 9 | 7 | 8 | 9 | 7 | 6 | 7 | 7 | 7 | 7 | 6 | 10 | 8 | 4 | 5 | 4 | 4 | 10 | 4 | |||
4200 | 8200 | 4700 | 920 | 4100 | 3400 | 3500 | 4000 | 5000 | 4600 | 8200 | 6200 | 6000 | 2100 | 1800 | 2100 | 5100 | 11000 | 12000 | 17000 | 5300 | 31000 | 110000 | 9700 | 6200 | 5400 | 7300 | |||
音無瀬橋 | 由良川 | 7.4 | 7.3 | 7.2 | 7.3 | 7.3 | 7.4 | 7.2 | 7.0 | 7.2 | 7.1 | 7.2 | 7.4 | 7.3 | 7.3 | 7.4 | 7.3 | 7.5 | 7.4 | 7.3 | 7.3 | 7.2 | 7.4 | 7.4 | 7.3 | 7.4 | 7.4 | 7.4 | |
11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9.9 | 10.1 | 10.2 | 10.2 | 10.6 | 10.1 | 10.3 | 10.5 | 10.6 | 10.6 | 10.3 | 10.8 | 11.0 | 10.7 | 10.6 | 10.5 | |||
1.5 | 1.3 | 1.2 | 0.9 | 0.9 | 1.3 | 1.0 | 1.0 | 0.9 | 0.8 | 0.8 | 0.8 | 0.8 | 0.9 | 0.6 | 0.7 | 0.8 | 0.8 | 0.6 | 0.7 | 0.8 | 0.9 | 0.7 | 0.7 | 0.7 | 0.6 | 0.7 | |||
6 | 9 | 9 | 6 | 6 | 5 | 9 | 4 | 9 | 6 | 6 | 7 | 5 | 5 | 9 | 6 | 6 | 6 | 5 | 9 | 10 | 4 | 3 | 4 | 4 | 4 | 4 | |||
5800 | 6500 | 4700 | 6100 | 6100 | 13000 | 6500 | 2100 | 3400 | 5300 | 9000 | 5300 | 1700 | 2300 | 1700 | 1600 | 3600 | 5500 | 6800 | 6400 | 6000 | 10000 | 12000 | 16000 | 7800 | 14000 | 8900 | |||
土師橋 | 土師川 | 7.7 | 7.5 | 7.4 | 7.4 | 7.3 | 7.4 | 7.3 | 7.1 | 7.3 | 7.2 | 7.3 | 7.4 | 7.5 | 7.4 | 7.6 | 7.5 | 7.7 | 7.5 | 7.4 | 7.5 | 7.4 | 7.6 | 7.6 | 7.5 | 7.5 | 7.6 | 7.6 | |
10 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 10 | 10 | 10 | 10 | 10.6 | 10.3 | 10.5 | 10.7 | 10.2 | 10.6 | 10.6 | 10.8 | 10.6 | 10.6 | 11.1 | 11.1 | 10.7 | 10.6 | 10.6 | |||
1.3 | 1.5 | 1.2 | 1.0 | 1.0 | 1.1 | 1.1 | 1.4 | 1.1 | 0.8 | 0.8 | 0.8 | 0.7 | 0.8 | 0.7 | 0.6 | 0.8 | 0.8 | 0.6 | 0.8 | 0.8 | 1.0 | 0.8 | 0.8 | 0.7 | 0.6 | 0.7 | |||
9 | 15 | 15 | 12 | 12 | 8 | 13 | 8 | 15 | 6 | 7 | 26 | 23 | 10 | 11 | 5 | 7 | 4 | 5 | 7 | 8 | 4 | 5 | 6 | 5 | 4 | 4 | |||
2100 | 22000 | 6900 | 4000 | 5500 | 15000 | 14000 | 2900 | 5600 | 4800 | 5800 | 8700 | 7500 | 4300 | 1200 | 1500 | 5500 | 8300 | 3800 | 21000 | 5400 | 6200 | 15000 | 10000 | 6100 | 7500 | 5500 | |||
以久田橋 | 由良川 | 6.7 | 7.0 | 7.3 | 7.4 | 7.2 | 7.2 | 7.5 | 7.2 | 7.2 | 7.2 | 7.1 | 7.2 | 7.4 | 7.3 | 7.3 | 7.3 | 7.5 | 7.1 | 7.2 | 7.2 | 7.2 | 7.1 | 7.3 | 7.3 | 7.3 | 7.3 | 7.4 | |
11 | 11 | 10 | 10 | 10 | 10 | 9 | 11 | 10 | 10 | 10 | 8.6 | 10.2 | 10.1 | 9.2 | 9.5 | 9.2 | 8.5 | 9.3 | 9.1 | 9.4 | 8.7 | 10.0 | 9.4 | 10.5 | 10.6 | 10.6 | |||
1.6 | 1.2 | 1.0 | 0.9 | 1.2 | 1.0 | 0.8 | 0.9 | 0.9 | 0.8 | 0.8 | 1.2 | 0.7 | 0.8 | 0.6 | 0.5 | 0.8 | 1.2 | 0.6 | 0.8 | 0.8 | 1.4 | 0.8 | 0.9 | 0.7 | 0.6 | 0.7 | |||
4 | 8 | 6 | 4 | 7 | 3 | 2 | 4 | 8 | 5 | 5 | 4 | 5 | 5 | 5 | 4 | 6 | 5 | 4 | 4 | 6 | 5 | 3 | 3 | 3 | 3 | 3 | |||
7000 | 5200 | 11000 | 2800 | 12000 | 18000 | 8300 | 2400 | 7800 | 6500 | 4500 | 28000 | 3800 | 5700 | 2200 | 1500 | 7700 | 18000 | 5100 | 4300 | 16000 | 46000 | 12000 | 12000 | 4000 | 7900 | 4300 | |||
山家橋 | 由良川 | 7.3 | 7.2 | 7.5 | 7.4 | 7.3 | 7.2 | 7.2 | 7.1 | 7.3 | 7.2 | 7.2 | 7.3 | 7.4 | 7.2 | 7.3 | 7.3 | 7.3 | 7.5 | 7.4 | 7.6 | 7.7 | 7.0 | 7.4 | 6.8 | 7.3 | 7.3 | 7.1 | |
11 | 11 | 10 | 10 | 10 | 10 | 10 | 11 | 10 | 10 | 10 | 9.9 | 9.9 | 9.9 | 10.4 | 11 | 11 | 10 | 9.9 | 10 | 9.8 | 8.9 | 9.7 | 10.3 | 10.2 | 9.9 | 9.5 | |||
1.4 | 1.3 | 0.9 | 0.7 | 0.8 | 0.8 | 0.6 | 0.8 | 0.8 | 0.6 | 0.5 | 0.8 | 0.6 | 1.4 | 1.0 | 0.7 | 0.7 | 0.7 | 0.7 | 0.8 | 0.9 | 0.9 | 0.9 | 1.5 | 1.0 | 1.0 | 1.2 | |||
3 | 4 | 3 | 4 | 7 | 2 | 3 | 3 | 8 | 4 | 3 | 4 | 3 | 2 | 5 | 3 | 5 | 4 | 4 | 6 | 4 | 3 | 2 | 2 | 3 | 3 | 2 | |||
3200 | 3700 | 2100 | 3200 | 5200 | 2000 | 210 | 1900 | 900 | 790 | 680 | 5000 | 800 | 690 | 670 | 680 | 730 | 1700 | 3600 | 3700 | 2800 | 1700 | 740 | 1600 | 1300 | 2200 | 910 | |||
安野橋 | 由良川 | 7.0 | 6.9 | 7.1 | 7.1 | 7.3 | 6.3~7.3 | 6.6~7.8 | 6.6~7.3 | 6.6~7.3 | 6.9 | 6.9 | 6.9 | 6.9 | 6.8 | 6.9 | 7.2 | 7.1 | 7.3 | 7.1 | 7.0 | 6.9 | 6.9 | 6.7 | 6.6 | 6.5 | |||
11 | 10 | 10.8 | 11 | 9.8 | 9.5 | 11 | 11 | 11 | 10 | 10 | 11 | 10.9 | 10.7 | 10.6 | 11 | 10 | 10 | 11 | 11 | 11 | 11 | 10.6 | 10.8 | 10.3 | 10.5 | 10.1 | |||
1.2 | 1.3 | 0.8 | 1.5 | 1.3 | 1.6 | 1.6 | 1.4 | 0.6 | 1.2 | 1.2 | 0.6 | 0.6 | 0.6 | 0.6 | 0.5 | 0.6 | 0.5 | 0.5 | 0.6 | 0.5 | 0.6 | 0.6 | 0.7 | 0.6 | 0.9 | 0.5 | |||
3 | 2 | 3.1 | 6 | 2 | 4 | 16 | 3 | 18 | 2 | 1 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | |||
840 | 560 | 660 | 1700 | 1300 | 1100 | 1100 | 640 | 1100 | 1500 | 140 | 380 | 390 | 720 | 380 | 180 | 910 | 120 | 1100 | 3000 | 470 | 1900 | 1600 | 1900 | 990 | 1000 | 1200 | |||
広田橋 | 竹田川 | 7.2 | 7.1 | 7.4 | 7.0 | 7.1 | 7.1 | 7.1 | 7.1 | 7.3 | 7.1 | 7.1 | 7.1 | 7.3 | 7.3 | 7.1 | 7.2 | 7.4 | 7.3 | 7.2 | 7.3 | 7.1 | 7.3 | 7.7 | 7.7 | ||||
9.4 | 9.3 | 9.4 | 9.8 | 10 | 10.4 | 9.4 | 9.5 | 9.7 | 10.0 | 9.8 | 9.5 | 10 | 9.9 | 10.3 | 10 | 11 | 11 | 11 | 11.0 | 10.8 | 10.2 | 10.1 | 12.4 | ||||||
1.9 | 2.2 | 2.0 | 1.5 | 2.0 | 1.6 | 1.7 | 1.3 | 1.1 | 1.2 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 1.1 | 1.1 | 1.8 | 2.8 | 1.4 | 0.9 | 0.9 | 1.2 | 0.9 | ||||||
27 | 16 | 14 | 14 | 18 | 16.8 | 13.5 | 13 | 10 | 13 | 9 | 5 | 5 | 8 | 7 | 13 | 5 | 8 | 6 | 6 | 8 | 4 | 4 | 9 | ||||||
28000 | 4500 | 4200 | 2200 | 1800 | 2800 | 5200 | 3100 | 1200 | 2500 | 2900 | 1800 | 5000 | 8400 | 3600 | 3800 | 2300 | 7600 | 4900 | 1100 | 4200 | 1500 | 3600 | 3100 |