Civil Engineering - GATE Exam Questions - Discussion

4. 

An outlet irrigates an area of 20 ha. The discharge (l/s) required at this outlet to meet the evapotranspiration requirement of 20 mm occurring uniformly in 20 days neglecting other field losses is

[A]. 2.52
[B]. 2.31
[C]. 2.01
[D]. 1.52

Answer: Option B

Explanation:

No answer description available for this question.

Elvis Presley said: (Jun 22, 2016)  
D = 8.64 *20/.02
= 8640 ha/cumec.

Q = A/D.
= 20/8640.
= 2.31* 10^-3 cumec.

Snehal Wankhede said: (Sep 2, 2016)  
Q = A * depth/days = 2.31.

Rakesh Kumar said: (Jan 17, 2017)  
Can anyone explain this properly?

Prashanth said: (Apr 27, 2020)  
Q=V/t =A*D/t.
Q=20*10^4X0.02/20
Q=200m^3/day.

But the question asked is discharge (L/s) so we should convert to L/s from m^3/day..
Q=200*1000/86400,
Q=2.31
Q=20*10^4*10^3*0.02/20*86400.
Q=2.31L/s.

Where,
Q-discharge.
V-volume.

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