Two flow lines for seepage across an interface between two soil medium having different coefficient of permeability is as shown in the figure below. The entrance angle at the interface is 60° then:k, =1.0 x 10° m/sk -4 x 10 m/s(1)a(2)The exit angle az at interface is 67,55°,ACorrect OptionBThe exit angle az at interface is 81.79,Correct OptionThe change in exit angle if 'k2' is reduced by 25% is 2.68°.DThe change in exit angle if 'k2' is reduced by 25% is 1.78°.

Two flow lines for seepage across an interface between two soil medium having different coefficient of permeability is as shown in the figure below. The entrance angle at the interface is 60' then: k, -1.0 x 10° m/s k,-4x 10 m/s (1) (2) The exit angle az at interface is 67.55. Correct Option The exit angle az at interface is 81.79. Correct Option O The change in exit angle if 'k2 is reduced by 25% is 2.68°. The change in exit angle if 'k2' is reduced by 25% is 1.78". D

Two flow lines for seepage across an interface between two soil medium having different coefficient of permeability is as shown in the figure below. The entrance angle at the interface is 60' then: k, -1.0 x 10° m/s k,-4x 10 m/s (1) (2) The exit angle az at interface is 67.55. Correct Option The exit angle az at interface is 81.79. Correct Option O The change in exit angle if 'k2 is reduced by 25% is 2.68°. The change in exit angle if 'k2' is reduced by 25% is 1.78". D

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter6: Hydraulic Conductivity

Section: Chapter Questions

Problem 6.1P

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Concept explainers

Principles of Seepage

In hydrology, when water flows down in a pore or crack of unsaturated soil due to gravity, the deep layer of soil is called seepage. It is the slow movement of water in the soil layer. Seepage is mainly found near hydraulic structures and is responsible for the stability of earthen-type hydraulic structures.

Question

Two flow lines for seepage across an interface between two soil medium having different coefficient of permeability is as shown in the figure below. The entrance angle at the interface is 60° then:
k, =1.0 x 10° m/s
k -4 x 10 m/s
(1)
a
(2)
The exit angle az at interface is 67,55°,
A
Correct Option
B
The exit angle az at interface is 81.79,
Correct Option
The change in exit angle if 'k2' is reduced by 25% is 2.68°.
D
The change in exit angle if 'k2' is reduced by 25% is 1.78°.

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