Tensiometer for shallow or deep measurements including vadose zone and aquifers

Patent · 31 December 1998

OSTI ID:872461

Faybishenko, Boris ^[1]

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1. Berkeley, CA

A two cell tensiometer is described in which water level in the lower cell is maintained at a relatively constant height, and in equilibrium with the water pressure of materials that surround the tensiometer. An isolated volume of air in the lower cell changes pressure proportionately to the changing water pressure of the materials that surround the tensiometer. The air pressure is measured remotely. The tensiometer can be used in drying as well as wetting cycles above and below the water table.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
• DOE Contract Number: AC03-76SF00098
• Assignee: Regents of University of California (Oakland, CA)
• Patent Number(s): US 5941121
• OSTI ID: 872461
• Country of Publication: United States
• Language: English

Related Subjects

/73/
air
air pressure
aquifers
below
cell
changes
changing
constant
constant height
cycles
deep
described
drying
equilibrium
height
including
isolated
level
maintained
materials
measured
measurements
pressure
proportionately
relatively
relatively constant
remotely
shallow
surround
table
tensiometer
vadose
vadose zone
volume
water
water level
water pressure
wetting
zone