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In a laboratory, a falling-head permeability test was conducted on a silty soil. For the falling-head...

In a laboratory, a falling-head permeability test was conducted on a silty soil. For the falling-head apparatus, the following data were obtained:

1. Length of Specimen = 15.80 cm.
2. Diameter of Specimen = 10.16 cm.
3. Cross-sectional area of burette = 1.83 cm2
4. Hydraulic head at beginning of test (h1) = 120.0 cm.
5. Hydraulic head at end of test (h2) = 110.0 cm.
6. Time required for water in the burette to drop from   h1 to h2 = 20.0 min (1200s)
7. Temperature of water = .20 deg C

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Find the Coefficient of permeability = ______ x 10 -5 cm/ sec

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Answer #1

- Falling head Permeability Test: Permeability K= 2.303 al logio [hy ] At a - Area of bluette = 1.82cm L- Length of specimen

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