Civil Engineering - GATE Exam Questions - Discussion

3. 

Water table drops by 3 m in an irrigable land of 50 hectare. If porosity and specific retention are 0.30 and 0.10 respectively, the change in storage in hectare-meter is :

[A]. 15
[B]. 30
[C]. 45
[D]. 60

Answer: Option B

Explanation:

No answer description available for this question.

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

Himani Soni said: (Feb 11, 2017)  
Porosity = Specific yeild + Specific Retention
.30= specific yeild + .10.

Spy = .20.
Then .20*50" * 3.
= 30.

Abc said: (Apr 2, 2018)  
Thanks @Himani.

Abhi said: (Mar 20, 2019)  
Thanks for explaining @Himani Soni.

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