測定対象
| 地点統一番号 |
水域名 |
地点名 |
環境基準類型 |
| 24401 |
折壁川 |
折壁 |
|
測定結果
| 採取年月日 |
2001.05.24 |
2001.06.25 |
2001.07.23 |
2001.08.20 |
2001.09.25 |
2001.10.15 |
2001.11.09 |
2001.12.10 |
2002.01.06 |
2002.02.07 |
2002.03.01 |
| 採取時刻 |
1014 |
1000 |
0940 |
1010 |
1010 |
1010 |
1012 |
1013 |
1036 |
1010 |
1005 |
| 天候 |
曇り |
曇り |
曇り |
曇り |
晴れ |
晴れ |
曇り |
晴れ |
曇り |
曇り |
晴れ |
| 気温 (℃) |
17.0 |
18.0 |
24.0 |
21.0 |
19.0 |
13.0 |
11.0 |
0.6 |
1.8 |
2.5 |
5.0 |
| 水温 (℃) |
11.8 |
14.6 |
15.5 |
16.3 |
14.0 |
12.0 |
9.8 |
4.2 |
3.1 |
4.6 |
5.6 |
| 採取水深 (m) |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
| 前日までの降雨状況 |
00 |
00 |
00 |
00 |
00 |
00 |
00 |
00 |
前日小雨 |
00 |
前日小雨 |
| pH |
7.4 |
7.3 |
7.1 |
6.9 |
7.3 |
7.5 |
7.1 |
7.4 |
7.3 |
7.3 |
7.3 |
| DO (mg/l) |
10.0 |
10.0 |
9.4 |
9.5 |
11.0 |
11.0 |
11.0 |
13.0 |
13.0 |
13.0 |
13.0 |
| BOD (mg/l) |
0.8 |
< 0.5 |
1.1 |
0.7 |
< 0.5 |
< 0.5 |
0.8 |
< 0.5 |
0.7 |
1.3 |
1.3 |
| COD (mg/l) |
2.0 |
1.5 |
1.6 |
1.3 |
1.2 |
1.0 |
1.3 |
1.1 |
0.7 |
2.4 |
1.9 |
| SS (mg/l) |
5 |
1 |
1 |
< 1 |
< 1 |
< 1 |
< 1 |
< 1 |
1 |
< 1 |
< 1 |
| 大腸菌群数 (MPN/100ml) |
2.8E+02 |
3.3E+03 |
4.9E+03 |
4.9E+03 |
1.6E+03 |
7.0E+02 |
1.4E+02 |
1.1E+03 |
4.9E+01 |
7.9E+01 |
7.0E+01 |
| 全窒素 (mg/l) |
0.82 |
0.89 |
0.83 |
0.78 |
0.85 |
0.78 |
1.00 |
0.76 |
0.74 |
0.80 |
1.20 |
| 全燐 (mg/l) |
0.015 |
0.014 |
0.015 |
0.013 |
0.009 |
0.017 |
0.011 |
0.012 |
0.010 |
0.013 |
0.011 |
| アンモニア性窒素 (mg/l) |
< 0.1 |
< 0.1 |
< 0.1 |
< 0.1 |
< 0.1 |
0.1 |
< 0.1 |
< 0.1 |
< 0.1 |
< 0.1 |
< 0.1 |
| クロロフィル-a (ug/l) |
< 2 |
< 2 |
< 2 |
< 2 |
< 2 |
< 2 |
< 2 |
< 2 |
< 2 |
< 2 |
< 2 |
| 硝酸性窒素及び亜硝酸性窒素 (mg/l) |
0.79 |
0.87 |
0.73 |
0.68 |
0.84 |
0.66 |
0.91 |
0.70 |
0.60 |
0.75 |
0.84 |