Civil Engineering - Water Resources Engineering - Discussion
Discussion Forum : Water Resources Engineering - Section 3 (Q.No. 42)
42.
The coefficients of permeability of soils of an unconfined aquifer and another confined aquifer were determined by pumping water from the wells and observing the effect of water table in two test wells at equal distances was found to be equal. The total height of confined aquifer H is given by
H = h2 - h1
H = h1 - h2
H = h2 + h1
(h1 + h2)Discussion:
3 comments Page 1 of 1.
Santosh Kumar said:
3 years ago
Equate formulas for permeability of unconfined and confined aquifers respectively and you will get d as answer
2.303 Q log(r2/r1)/√(h2^2-h1^2) == 2.303 Q log (r2/r1)/2√H (h2-h1).
Using h2^2 --h1^2 = (h2-h1) (h2+h1) in the above eqn we get option D as the correct answer.
2.303 Q log(r2/r1)/√(h2^2-h1^2) == 2.303 Q log (r2/r1)/2√H (h2-h1).
Using h2^2 --h1^2 = (h2-h1) (h2+h1) in the above eqn we get option D as the correct answer.
Syed Rawal Ali said:
4 years ago
Though the value of permeability is same, Drainage path for confined auqifer will be halved due to impermeable strata on one side.
Hassan Bilal said:
5 years ago
Please explain this.
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