Civil Engineering - GATE Exam Questions - Discussion

Discussion Forum : GATE Exam Questions - Section 6 (Q.No. 3)
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 :
15
30
45
60
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
5 comments Page 1 of 1.

Nitesh Raturi said:   2 years ago
sy+sr = n
sy = 0.30 - 0.10 = 0.20.

sy = volume of water/volume of soil.

Volume of soil = volume of water * volume of soil.
Volume of soil = 50*3*0.2 = 30.
(2)

Abhi said:   5 years ago
Thanks for explaining @Himani Soni.

Abc said:   6 years ago
Thanks @Himani.

Himani soni said:   7 years ago
Porosity = Specific yeild + Specific Retention
.30= specific yeild + .10.

Spy = .20.
Then .20*50" * 3.
= 30.
(1)

Rakesh kumar said:   7 years ago
Can anyone explain this with formula?

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