Answered: The data from a falling head test is…

The data from a falling head test is shown. Diameter of standpipe: 6 cm. Initial Head: 90.4 cm. Duration of test: 18 min.

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter17: Subsoil Exploration

Section: Chapter Questions

Problem 17.2P

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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

Question 30

The data from a falling head test is shown.

Diameter of standpipe: 6 cm.

Initial Head: 90.4 cm.

Duration of test: 18 min.

Length of soil sample: 30.35 cm.

Diameter of permeameter: 44 cm.

If the soil permeability is 0.0038 cm/min, determine the final head (in cm.) of the permeability test.

Round off to two decimal places.

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