Question: A falling-head permeability test is performed on a soil whose permeability is estimated to be 2.8 x 10-6 m/s. What diameter standpipe for head to

A falling-head permeability test is performed on a soil whose permeability is estimated to be 2.8 x 10-6 m/s. What diameter standpipe for head to drop from 31.2 cm to 19.4 cm in about 5 min? The cross section is 12 cm2 and its length is 7.4 cm. (Taylor, 1948)?

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