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Skidder Traffic Effects on Water Retention, Pore-Size Distribution, and van Genuchten Parameters of Boreal Forest Soils

Forest Resources, Alberta Research Council, PO Bag 4000, Vegreville, AB, Canada T9C 1T4

View larger version (29K): [in a new window]   Fig. 1. Effects of different levels of skidder traffic on the soil water retention curves generalized for two groups of sites separated by the presence or absence of significant compaction following three skidding cycles (Table 1). Curves represent van Genuchten's equation (Eq. [1]) and its derivative function (Eq. [2]) with the parameter estimates as in Table 4

View larger version (28K): [in a new window]   Fig. 2. Effects of different levels of skidder traffic on the cumulative water content and its derivation as a function of the effective pore diameter (pore-size distribution) depending on the presence or absence of significant compaction following three skidding cycles (Table 1)