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A Pore Water Conductivity Sensor
Author(s) -
Hilhorst M. A.
Publication year - 2000
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj2000.6461922x
Subject(s) - conductivity , soil water , permittivity , materials science , saturation (graph theory) , pore water pressure , water content , soil science , electrical resistivity and conductivity , hydraulic conductivity , analytical chemistry (journal) , dielectric , environmental science , geotechnical engineering , chemistry , geology , environmental chemistry , optoelectronics , mathematics , physics , combinatorics , quantum mechanics
The electrical permittivity and conductivity of the bulk soil are a function of the permittivity and conductivity of the pore water. For soil water contents higher than 0.10 both functions are equal, facilitating in situ conductivity measurements of the pore water. A novel method is described, based on simultaneous measurements of permittivity and conductivity of the bulk soil from which the conductivity of the pore water can be calculated. A prototype of a pore water conductivity sensor based on this method is presented. Validation results show that the method can be used for a broad range of soils and is valid for water contents between 0.10 and saturation and for the conductivity of the pore water up to 0.3 S m −1