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Improved design for an automated tension infiltrometer

Dep. of Soil Science, North Dakota State Univ., Fargo, ND 58105

View larger version (41K): [in a new window]   Fig. 1. Schematic of the tension infiltrometer configured with a single differential transducer.

View larger version (26K): [in a new window]   Fig. 2. Water height and transducer voltage output variations in the infiltrometer reservoir through time caused by bubbling without outflow and measured using one differential transducer.

View larger version (20K): [in a new window]   Fig. 3. Cumulative infiltration at 5-cm tension vs. square-root of time measured in situ with the differential transducer configuration. Equation [1] was fitted to the measured data.