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Figure 3


Fig. 3. The tortuosity–connectivity parameter ({eta}) values as a function of the Campbell (1974) b for lysimeter soils (Rønhave, Foulum, and Jyndevad). Three expressions for {eta}(b), {eta} = 2 + 3/b (Burdine, 1953), {eta} = 2 + 5/2b (Mualem, 1976), and {eta} = 1 + 3/b (Alexander and Skaggs, 1986) are given by solid curves. The {eta} = 1 + 0.25b (Moldrup et al., 1998) and {eta} = 1 + 0.05b (Moldrup et al., 2001) are given by broken lines.