Fig. 6. Sensitivity of tortuosity () on tortuosity–connectivity parameters, l₁ and l₂ of undisturbed soil samples for (a) water and (b) air phase and of disturbed soil samples for (c) water and (d) air phase, respectively. Shaded areas in each figure represent range of l₁ and l₂ parameters (Table 3) of water and air phase, respectively, for corresponding undisturbed and disturbed soil samples.