Civil Engineering - Waste Water Engineering - Discussion

2. 

If D.O. concentration falls down to zero in any natural drainage, it indicates the zone of

[A]. degradation
[B]. active decomposition
[C]. recovery
[D]. cleaner water
[E]. none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Rajeev Yadav said: (Jul 19, 2015)  
Zone of degradation, DO = 40%.

Zone of active decomposition, DO = 0%.

Zone of recovery, DO = 40.

Zone of clear water, DO = 100%.

So answer B.

Amu Bokato said: (Mar 13, 2019)  
Thank you @Rajeev.

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