測定対象
| 地点統一番号 |
水域名 |
地点名 |
環境基準類型 |
| 25801 |
北川目川 |
日向ダム流入前 |
|
測定結果
| 採取年月日 |
2005.05.20 |
2005.06.08 |
2005.06.29 |
2005.07.20 |
2005.08.10 |
2005.09.12 |
2005.10.05 |
2005.11.02 |
2005.12.07 |
2006.01.11 |
2006.02.01 |
2006.03.01 |
| 採取時刻 |
1200 |
1200 |
1200 |
1200 |
1200 |
1200 |
1200 |
1200 |
1200 |
1200 |
1200 |
1200 |
| 水温 (℃) |
12.1 |
15.8 |
18.2 |
17.1 |
16.4 |
13.9 |
14.7 |
11.9 |
4.5 |
2.4 |
0.7 |
2.3 |
| 採取水深 (m) |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| pH |
7.8 |
7.6 |
7.8 |
7.8 |
7.8 |
7.8 |
7.7 |
7.8 |
7.7 |
7.7 |
7.6 |
7.5 |
| DO (mg/l) |
9.3 |
9.4 |
9.2 |
9.5 |
9.2 |
9.4 |
9.8 |
10 |
12 |
13 |
11 |
12 |
| BOD (mg/l) |
0.7 |
0.7 |
< 0.5 |
< 0.5 |
< 0.5 |
< 0.5 |
1 |
< 0.5 |
< 0.5 |
1.3 |
1 |
1.1 |
| COD (mg/l) |
1.3 |
1.4 |
2 |
1.3 |
1.7 |
0.9 |
1 |
1 |
1.1 |
1 |
1 |
1.3 |
| SS (mg/l) |
< 1 |
< 1 |
2 |
2 |
2 |
1 |
1 |
1 |
1 |
< 1 |
< 1 |
< 1 |
| 大腸菌群数 (MPN/100ml) |
49 |
330 |
490 |
1300 |
24000 |
1100 |
790 |
490 |
49 |
23 |
23 |
33 |
| 全窒素 (mg/l) |
0.13 |
0.15 |
0.25 |
0.15 |
0.17 |
0.14 |
0.19 |
0.07 |
< 0.05 |
0.05 |
0.06 |
0.21 |
| 全燐 (mg/l) |
0.011 |
0.013 |
0.008 |
0.009 |
0.015 |
0.012 |
0.019 |
0.01 |
0.006 |
< 0.003 |
< 0.003 |
< 0.003 |
| クロロフィル-a (ug/l) |
< 1 |
< 1 |
< 1 |
< 1 |
< 1 |
< 1 |
5 |
< 1 |
< 1 |
< 1 |
< 1 |
< 1 |