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Field Testing Parameter Sensitivity of the Two-Term Infiltration Equation Using Differentiated Linearization

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

View larger version (31K): [in a new window]   Fig. 1. Location of the experiment sites.

View larger version (31K): [in a new window]   Fig. 2. Application of the differentiated linearization (DL) method to the field data obtained in Exp. (a) 5L, (b) 8L, and (c) 6TI. The straight line was obtained by regression of the increasing linear part of the I/ vs. data.

View larger version (21K): [in a new window]   Fig. 3. Application of the differentiated linearization (DL) method to the field data obtained in Exp. (a) 13L and (b) 2TI.

View larger version (18K): [in a new window]   Fig. 4. Cumulative infiltration, I, vs. square root of time, , for Exp. (a) 13L and (b) 2TI. The straight lines are the regressions of I vs. for the contact material wetting phase (dotted line) and for the phase where sorptivity of the soil dominates the flow (continuous line).

View larger version (9K): [in a new window]   Fig. 5. Cumulative infiltration, I, vs. time, t, for Exp. 5L. The straight line was obtained by regression of the linear part of the I vs. t data.

View larger version (16K): [in a new window]   Fig. 6. Soil hydraulic conductivity, K0, estimate vs. duration of the experiment.