A constant=head test was conducted on a sample of soil 15 cm long and 60 cm? in cross-sectional area. The quantity of water collected was 50 cm' in 20s under a head difference of 24 cm. Calculate the hydraulic conductivity. If the porosity of the sand is 55%, calculate the average velocity and the seepage velocity. Estimate the hydraulic conductivity of a similar soil with a porosity of 35% from the results of this test.

1. A series of Atterberg limit tests was performed on samples of a gray-brown silty clay. The table below summarizes the results of four liquid limit tests. Using this data, Trial Number Number of blows Weight of wet sample + container (g) Weight of dry sample + container (g) Weight of container (g) 15.61 16.82 16.34 a. Determine the flow curve for the soil (graph and show the equation of the best fit line) b. Determine the flow index for the soil 1 23 2 36 3 26 15.12 4 c. Calculate the liquid limit d. Calculate the plasticity index Plastic limit tests show an average of 38.5%. 23.50 26.94 26.86 26.27 21 19.89 22.10 22.59 21.96