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Factors Affecting Measurement of the Near-Saturated Soil Hydraulic Conductivity

Dipartimento di Ingegneria e Tecnologie Agro-Forestali, Università degli Studi, Viale delle Scienze, 90128, Palermo, Italy

View larger version (14K): [in a new window]   Fig. 1 Relationship between the steady-state infiltration rate (is) corresponding with a pressure head h0 = -120 mm and the initial gravimetric water content (g,i). The relationships obtained by Lin et al. (1998) for pressure heads h0 = 0 and h0 = -30 mm are also plotted

View larger version (31K): [in a new window]   Fig. 2 Satiated hydraulic conductivity (Kst) values measured on undisturbed soil cores in three successive runs and saturated hydraulic conductivity (Ks) values measured on the same cores before (fourth run) and after (fifth run) removing a thin layer of soil from the surface of the core

View larger version (31K): [in a new window]   Fig. 3 Comparison between the hydraulic conductivity (K) vs. soil water pressure head (h) relationships obtained with the pressure and tension infiltrometer technique and (a) the multistep method and (b) the pressure infiltrometer method