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>>NH4 |
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Ammonia
toxicity is related closely with the pH and temperature
of water.In general, when pH and the the temperature of
water is higher, the stronger the toxicity. Its hazards
to fish is just like nitrite. In Taiwan, we use
rpi(River Pollution Index) as river polluttion index.
It's composed of four testing elements: DO, BOD5, NH3-N
and Suspendid Solids. |
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NH4
Testing Result at Plum Tree Creek |
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Observation
Point |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
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Low
Flow |
0 |
0.2 |
0.5 |
0.5 |
1 |
0.2 |
0.2 |
0.5 |
2 |
5 |
10 |
10 |
10 |
|
High
Flow |
0 |
0 |
0.2 |
0.5 |
0.5 |
0.2 |
0.2 |
0.2 |
1 |
5 |
10 |
10 |
5 |
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NH4
Statistical Chart of Plum Tree Creek |
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 |
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Analysis：
Origin-pollution
free
Headstream-
moderate pollution
Midstream-
mild polluted
Downstream-serious
polluted
The
contain of NH4 were not much differences between high
and low flow. NH4 were mainly from thepig and domestic
sewage. It’s seriously polluted even during high flow. |
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Reference： Hazard
of ammonia, nitrate and nitrite nitrogen. Zg17.com |
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| The least NH
4 in
origin
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Mild pollution in midstream
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| Highest NH
4 in
downstream
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| Recording
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| Recording
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Introduction