Civil Engineering - Irrigation - Discussion

Discussion Forum : Irrigation - Section 2 (Q.No. 10)
10.
If the irrigation efficiency is 80%, conveyance losses are 20% and the actual depth of watering is 16 cm, the depth of water required at the canal outlet, is
10 cm
15 cm
20 cm
25 cm
30 cm
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
33 comments Page 4 of 4.

Shabbir Ahmad said:   3 years ago
The answer here is 20 cm because the depth required at the outlet is asked which is 16/(1-0.2) = 20 cm.

Mistake:
Depth of water at the inlet=20/0.8 = 25 cm.

We might mark an answer as 25 cm but as it is asked at the canal outlet, so 25 cm is not the answer.
(5)

ATUL said:   3 years ago
The Answer is 20cm.
(4)

Farhan said:   3 weeks ago
ir efi = 80% = 0.8.
con efi = 100 - 20 = 0.8,
Overall E = 0.8 * 0.8 = 0.64,
D at outlet = 16/0.64 = 25cm.


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