FIG. 5. Nonaqueous phase liquid (NAPL) permeability as a function of total fluid saturation for anisotropic heterogeneous soils 9–12 in Table 1 and for h_w = –2.0 m. L^p, connectivity–tortuosity coefficient in the direction parallel to strata; Lⁿ, connectivity–tortuosity coefficient in the direction normal to strata; R, ratio of correlation lengths of the direction parallel and normal to strata; Y = ln(K_s) with K_s being the saturated hydraulic conductivity; _Y², variance of Y.