For a falling head permeability test, the following values are given: Length of specimen = 38.69 cm, Area of specimen = 19.96 cm^2, and k = 2.86 x 10^-3 cm/sec. What should be the area (in cm^2) of the standpipe for the head to drop from 61 cm to 34 cm in 8.47 minutes?

For a falling head permeability test, the following values are given: Length of specimen = 38.69 cm, Area of specimen = 19.96 cm^2, and k = 2.86 x 10^-3 cm/sec. What should be the area (in cm^2) of the standpipe for the head to drop from 61 cm to 34 cm in 8.47 minutes?

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

For a falling head permeability test, the following values are given: Length of specimen = 38.69 cm, Area of specimen = 19.96 cm^2, and k = 2.86 x 10^-3 cm/sec. What should be the area (in cm^2) of the standpipe for the head to drop from 61 cm to 34 cm in 8.47 minutes?

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