1. A falling- head permeability test was run on a soil sample 9.6cm in diameter and 10cm long. The head at the start of the test was 90cm. The coefficient of permeability of the soil was found to be 5(10)6 cm/sec. The diameter of the standpipe was 1cm. a) Calculate the flow at the start of the test, in cc/hr. b) How much head was lost during the first 30 minutes? c) Calculate the flow after 30 minutes in cc/hr

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 6.7P
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1. A falling- head permeability test was run on a soil sample 9.6cm in diameter and 10cm
long. The head at the start of the test was 90cm. The coefficient of permeability of
the soil was found to be 5(10)6 cm/sec. The diameter of the standpipe was 1cm.
a) Calculate the flow at the start of the test, in cc/hr.
b) How much head was lost during the first 30 minutes?
c) Calculate the flow after 30 minutes in cc/hr
Transcribed Image Text:1. A falling- head permeability test was run on a soil sample 9.6cm in diameter and 10cm long. The head at the start of the test was 90cm. The coefficient of permeability of the soil was found to be 5(10)6 cm/sec. The diameter of the standpipe was 1cm. a) Calculate the flow at the start of the test, in cc/hr. b) How much head was lost during the first 30 minutes? c) Calculate the flow after 30 minutes in cc/hr
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