測定対象
地点統一番号 |
水域名 |
地点名 |
環境基準類型 |
01701 |
北上川(2) |
南大橋 |
A |
測定結果
採取年月日 |
1994.04.14 |
1994.05.11 |
1994.06.01 |
1994.07.20 |
1994.08.02 |
1994.08.02 |
1994.08.02 |
1994.08.02 |
1994.09.07 |
1994.10.17 |
1994.11.02 |
1994.12.07 |
1995.01.11 |
1995.02.01 |
1995.03.01 |
採取時刻 |
1425 |
1035 |
0918 |
0951 |
0045 |
0645 |
1245 |
1845 |
0935 |
0920 |
0947 |
0938 |
1007 |
0951 |
0941 |
天候 |
曇り |
曇り |
晴れ |
曇り |
曇り |
曇り |
曇り |
曇り |
曇り |
晴れ |
曇り |
曇り |
晴れ |
晴れ |
曇り |
気温 (℃) |
12.8 |
20.3 |
21.0 |
25.9 |
24.1 |
24.0 |
32.5 |
27.0 |
22.0 |
13.5 |
8.6 |
3.5 |
-2.9 |
1.0 |
3.0 |
水温 (℃) |
8.0 |
11.9 |
15.4 |
24.7 |
25.0 |
24.0 |
27.2 |
26.1 |
22.5 |
13.6 |
9.7 |
5.0 |
2.0 |
1.9 |
3.0 |
流量 (m3/s) |
133.45 |
85.94 |
114.41 |
39.38 |
18.31 |
18.31 |
18.31 |
43.04 |
43.04 |
63.79 |
24.92 |
59.31 |
55.00 |
35.88 |
34.19 |
pH |
7.6 |
7.2 |
7.3 |
7.9 |
7.4 |
7.5 |
8.6 |
7.4 |
7.8 |
7.6 |
7.7 |
7.5 |
7.4 |
7.4 |
7.5 |
DO (mg/l) |
12.0 |
11.0 |
10.0 |
9.3 |
6.7 |
7.4 |
9.3 |
6.4 |
9.2 |
10.0 |
12.0 |
13.0 |
14.0 |
13.0 |
14.0 |
BOD (mg/l) |
1.1 |
0.8 |
0.9 |
1.0 |
0.7 |
0.7 |
0.9 |
2.5 |
1.1 |
0.9 |
< 0.5 |
0.9 |
1.2 |
1.2 |
0.5 |
COD (mg/l) |
2.1 |
1.7 |
2.0 |
1.7 |
|
|
2.1 |
|
2.7 |
1.2 |
1.4 |
1.3 |
1.4 |
1.2 |
1.3 |
SS (mg/l) |
12 |
5 |
6 |
2 |
4 |
4 |
2 |
15 |
6 |
3 |
1 |
1 |
2 |
1 |
1 |
大腸菌群数 (MPN/100ml) |
7.9E+02 |
1.7E+03 |
1.4E+03 |
7.7E+03 |
4.9E+03 |
3.3E+03 |
2.4E+03 |
4.9E+04 |
3.3E+04 |
1.7E+03 |
1.7E+03 |
1.1E+03 |
3.3E+03 |
7.9E+02 |
7.9E+02 |
全窒素 (mg/l) |
|
0.63 |
|
1.00 |
|
|
|
|
0.91 |
|
0.85 |
|
0.79 |
|
0.86 |
全燐 (mg/l) |
|
0.019 |
|
0.020 |
|
|
|
|
0.026 |
|
0.011 |
|
0.012 |
|
0.014 |
砒素 (mg/l) |
< 0.005 |
< 0.005 |
< 0.005 |
< 0.005 |
|
|
< 0.005 |
|
< 0.005 |
< 0.005 |
< 0.005 |
< 0.005 |
< 0.005 |
< 0.005 |
< 0.005 |
トリクロロエチレン (mg/l) |
|
< 0.002 |
|
< 0.002 |
|
|
|
|
|
|
< 0.002 |
|
< 0.002 |
|
|
テトラクロロエチレン (mg/l) |
|
< 0.0005 |
|
< 0.0005 |
|
|
|
|
|
|
< 0.0005 |
|
< 0.0005 |
|
|
鉄(溶解性) (mg/l) |
|
0.15 |
|
0.10 |
|
|
|
|
0.16 |
|
0.07 |
|
0.13 |
|
0.08 |
透視度 |
> 30 |
> 30 |
> 30 |
> 30 |
> 30 |
> 30 |
> 30 |
24 |
> 30 |
> 30 |
> 30 |
> 30 |
> 30 |
> 30 |
> 30 |
塩化物イオン (mg/l) |
|
5 |
|
9 |
|
|
|
|
8 |
|
8 |
|
7 |
|
9 |
硫酸イオン (mg/l) |
|
12 |
|
38 |
|
|
|
|
30 |
|
24 |
|
25 |
|
28 |
酸度 (mg/l) |
|
2 |
|
2 |
|
|
|
|
2 |
|
2 |
|
3 |
|
3 |
アルカリ度 (mg/l) |
|
14.3 |
|
37.4 |
|
|
|
|
37.4 |
|
30.2 |
|
29 |
|
33 |