Vadose zone water fluxmeter

Details Vadose zone water fluxmeter Vadose zone water fluxmeter

2005-10-25

2005-10-25

Williams, Hezron (Department: 2856)

Measuring and testing

Borehole or drilling

Fluid flow measuring or fluid analysis

C073S073000, C073S152510, C073S152550, C137S078300

Reexamination Certificate

active

06957573

ABSTRACT:
A Vadose Zone Water Fluxmeter (WFM) or Direct Measurement WFM provides direct measurement of unsaturated water flow in the vadose zone. The fluxmeter is a cylindrical device that fits in a borehole or can be installed near the surface, or in pits, or in pile structures. The fluxmeter is primarily a combination of tensiometers and a porous element or plate in a water cell that is used for water injection or extraction under field conditions. The same water pressure measured outside and inside of the soil sheltered by the lower cylinder of the fluxmeter indicates that the water flux through the lower cylinder is similar to the water flux in the surrounding soil. The fluxmeter provides direct measurement of the water flow rate in the unsaturated soils and then determines the water flux, i.e. the water flow rate per unit area.

REFERENCES:
patent: 2878671 (1959-03-01), Prosser et al.
patent: 3961753 (1976-06-01), Sears
patent: 5941121 (1999-08-01), Faybishenko
patent: 5969242 (1999-10-01), Hubbell et al.

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