Automated tension infiltrometer

Details Automated tension infiltrometer Automated tension infiltrometer

1988-10-20

1989-12-05

Levy, Stewart J.

Measuring and testing

With fluid pressure

Porosity or permeability

73 73, G01N 1508

Patent

active

048844365

ABSTRACT:
An automated tension infiltrometer including a soil contacting base to which is mounted a porous plate for interfacing the infiltrometer with the soil to be analyzed. A Marriotte column is positioned in the base so that its open bottom end abuts the porous plate. A bubble tower is also positioned in the base and has a bubbling tube operatively connected between its interior and interior of the Marriotte column. The bubble tower is adjustable to provide variable tension to the Marriotte column. First and second transducers are positioned at the upper and lower parts of the Marriotte column and continuously measure pressure changes at those positions while water from the column infiltrates into the soil. By correlating these measurements, improved precision in measuring water level is achieved, which in turn allows improved results regarding deriving soil characteristic information.

REFERENCES:
patent: 2540096 (1951-02-01), Bull
patent: 3103117 (1963-09-01), Richards
patent: 3871211 (1975-03-01), Tal
patent: 3884067 (1975-05-01), Mottes
patent: 3898872 (1975-08-01), Skaling et al.
patent: 3910300 (1975-10-01), Tal
patent: 4478069 (1984-10-01), Zuckerwar
patent: 4520657 (1985-06-01), Marthaler
Moore, Burch and Wallbrink, "Preferential Flow and Hydraulic Conductivity of Forest Soils," Soil Sci. Soc. Am. J., pp. 876-881, vol. 50, 1986.
Constantz and Murphy, "An Automated Technique for Flow Measurements from Mariotte Reservoirs," Soil Sci, Soc., Am. J., pp. 252-254, vol. 51, 1987.
Clothier and White, "Measurement of Sorptivity and Soil Water Diffusivity in the Field," Soil Sci. Soc. Am. J., pp. 241-244, vol. 45, 1981.

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