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Fig. 6. (a) Log-log relation between Ks measured in the laboratory and Ks estimated from ka using Eq. [8] (Loll et al., 1999). The data include measurement on the 6280-cm3 soil columns sampled in the Ap horizon in relation to the grid points and in the Ap and B horizon in relation to the excavated soil profiles. Root mean square error is calculated on the arithmetic means of each site from the log-transformed data (data from the excavated soil profiles only). (b) Log-log relation between Ks measured in the laboratory and Ks estimated from Rosetta (Schaap et al., 2001) and Eq. [9] (Poulsen et al., 1999a). The data include measurements on the 6280-cm3 soil columns sampled in the Ap and B horizons in relation to the excavated soil profiles. Values of Ks (measured) are arithmetic means of each site on the log-transformed data.
