GATE CE 2020 Set 2 — Question 44
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Geotechnical Engineering → Permeability → Anisotropic Permeability
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Question
Permeability tests were carried out on the samples collected from two different layers as shown in the figure (not drawn to the scale). The relevant horizontal () and vertical () coefficients of permeability are indicated for each layer.
The ratio of the equivalent horizontal to vertical coefficients of permeability, is
Correct answer
(A) 37.29
Solution
To find the ratio of equivalent horizontal to vertical coefficients of permeability, we first calculate each:
1.Equivalent Horizontal Permeability ():
Given: , , , .2.Equivalent Vertical Permeability ():
Given: , .3.Ratio:
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