Question

Q1. A standard constant head permeability test was performed on a coarse sand soil sample that was 100 mm in diameter and 200 mm in length. The measured discharge through the sample was 2.16 litres per minute with an equivalent constant head loss of 845 mm (acting over the entire sample length). At the end of the test, the total mass of the sample was recorded 3.142 kg and the moisture content of the sample was measured at 24 %. Determine: (i) the average velocity or superficial velocity of the flow (in m/sec), (ii) the seepage or void velocity of the flow (in m/sec), and (iii) the coefficient of permeability of the soil (in m/sec).

Answer 1