In a constant head permeameter test, the length of the specimen is 200 mm and the cross-sectional area is 78.5 cm2 . If k = 2.1 x 10-2 cm/sec, and a rate of flow of 130 cm3 /min must be maintained during the test, what should be the head difference across the specimen?

In a constant head permeameter test, the length of the specimen is 200 mm and the cross-sectional area is 78.5 cm2 . If k = 2.1 x 10-2 cm/sec, and a rate of flow of 130 cm3 /min must be maintained during the test, what should be the head difference across the specimen?

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter7: Permeability

Section: Chapter Questions

Problem 7.23P

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Concept explainers

Laboratory Determination of Hydraulic Conductivity

Hydraulic conductivity is the measure of flowability of water inside the soil in the presence of a hydraulic gradient. The hydraulic gradient is defined as the difference in the water heads in the soil, which induces a water motion. In simple terms, a hydraulic gradient is the presence of a potential that induces a flow of water.

Question

In a constant head permeameter test, the length of the specimen is 200 mm and the cross-sectional
(d)
area is 78.5 cm?. If k = 2.1 x 10² cm/sec, and a rate of flow of 130 cm³/min must be maintained
during the test, what should be the head difference across the specimen?

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