In using a permeameter, it is sometimes convenient to make a “falling -head” test. The horizontal tube is 1 m long and 10 cm in diameter and is filled with sample material. During a test, the upstream head h₁ falls from 200 to 180 cm in 4 hr, while h₂ is held constant at 15 cm. The diameter of the vertical tube in which h₁ is measured is 40 cm. What is the indicated average hydraulic conductivity? Estimate the range between maximum and minimum values of hydraulic conductivity.
In using a permeameter, it is sometimes convenient to make a “falling -head” test. The horizontal tube is 1 m long and 10 cm in diameter and is filled with sample material. During a test, the upstream head h₁ falls from 200 to 180 cm in 4 hr, while h₂ is held constant at 15 cm. The diameter of the vertical tube in which h₁ is measured is 40 cm. What is the indicated average hydraulic conductivity? Estimate the range between maximum and minimum values of hydraulic conductivity.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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- In using a permeameter, it is sometimes convenient to make a “falling -head” test. The horizontal tube is 1 m long and 10 cm in diameter and is filled with sample material. During a test, the upstream head h₁ falls from 200 to 180 cm in 4 hr, while h₂ is held constant at 15 cm. The diameter of the vertical tube in which h₁ is measured is 40 cm. What is the indicated average hydraulic conductivity? Estimate the range between maximum and minimum values of hydraulic conductivity.
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