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Fig. 7. Depth distribution of log-transformed air permeability, log(ka), for (a, b, and c) Gjorslev and (d, e, and f) Mammen at three different soil-water matric potentials of –20, –50, and –160 cm H2O. Averaged measured data and standard deviation of log(ka) are shown. Predicted log(ka) by three different models for ka as a function of air-filled porosity [ka(
)], ka = ka,100(/100)1+3/b, ka = (8901002.5)(/100)X–1, and ka = 700(21003 + 0.04100)(/100)X–1, are given, where ka,100 and 100 are the values at matric potential of –100 cm H2O.
