The value of k is often very small. Therefore, a unit called darcy is used in petroleum industry. See Table 2.3 of the handout for detail. See Table 2.2 of the handout for detail. Varies over a wide range for different materials Varies in 2-3 orders of magnitude for same material.
Permeability is a function of particle size and distribution.
Sorting well, k increases. The lower the u, the better sorted the materials are. Recall that the x-axis is on log scale. The results shown in diamonds show relatively poorly sorted sediments compared to those of squares. Yes See handout Figure 2.8 for detail.