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
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
Answer: Option D
This Question Belongs to Civil Engineering >> Irrigation Engineering
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Manas Ranjan is right
Explain please
Loss 20% means efficiency is 80 %
80%[80%*X]=16
X=25
Depth of water required considering conveyance losses = 16/0.8 20 cm (20% is lost in conveyance means only 80% in reached. So we have to provide more depth of water). Irrigation efficiency is 80% (means if I provide 20 cm depth of water then only 80% land will get irrigated). To make 100 % irrigation, Depth of water from canal outlet 20/0.8 25 cm.
I hope its clear.
Look efficiency is 80% means if we put 100ltrs it will reach 80ltrs in 80 ltrs loss is 20%so
80*(20/100)=16ltr
So total loss 20+16=36
100-36=64
64 % water reach to field whichi is 16cm
16*(100/64)= 25cm
It is 16/.8=20
Then 20*1.20= 24 exact ans
Depth of water while considering conveyance losses = 16/0.8 = 20 cm (conveyance loss=20%)
Irrigation efficiency is 80%
Depth of water from canal outlet = 20/0.8 = 25 cm.
Depth of water while considering conveyance losses = 16/0.8 = 20 cm (conveyance loss=20%)
Irrigation efficiency =80%
Depth of water from canal outlet = 20/0.8 = 25 cm.
Explain please