A cylindrical soil sample 50 mm in diameter and 200 mm in height is used as the permeameter in a falling head permeability test setup. In one minute of observation, the hydraulic head in the 10 mm diameter standpipe through which test water went reduced from 900mm to 500 mm. During that time, 1.5 liters of water were collected in the graduate. Calculate the soil sample's permeability coefficient in cm/s.

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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.