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Title: Tensiometer for shallow or deep measurements including vadose zone and aquifers

Abstract

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.

Inventors:
 [1]
  1. Berkeley, CA
Issue Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
OSTI Identifier:
872461
Patent Number(s):
5941121
Assignee:
Regents of University of California (Oakland, CA)
Patent Classifications (CPCs):
E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
tensiometer; shallow; deep; measurements; including; vadose; zone; aquifers; cell; described; water; level; maintained; relatively; constant; height; equilibrium; pressure; materials; surround; isolated; volume; air; changes; proportionately; changing; measured; remotely; drying; wetting; cycles; below; table; water pressure; water level; relatively constant; air pressure; vadose zone; constant height; /73/

Citation Formats

Faybishenko, Boris. Tensiometer for shallow or deep measurements including vadose zone and aquifers. United States: N. p., 1999. Web.
Faybishenko, Boris. Tensiometer for shallow or deep measurements including vadose zone and aquifers. United States.
Faybishenko, Boris. Fri . "Tensiometer for shallow or deep measurements including vadose zone and aquifers". United States. https://www.osti.gov/servlets/purl/872461.
@article{osti_872461,
title = {Tensiometer for shallow or deep measurements including vadose zone and aquifers},
author = {Faybishenko, Boris},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

Patent:

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