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Comparison of Water Content‐Pressure Head Data Obtained by Equilibrium, Steady‐State, and Unsteady‐State Methods
Author(s) -
Topp G. C.,
Klute A.,
Peters D. B.
Publication year - 1967
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/sssaj1967.03615995003100030009x
Subject(s) - pressure head , hydraulic head , tensiometer (surface tension) , head (geology) , steady state (chemistry) , water content , flow (mathematics) , pressure sensor , water flow , mechanics , thermodynamics , geotechnical engineering , environmental science , geology , materials science , hydrology (agriculture) , chemistry , physics , geomorphology , surface tension
The water content‐pressure head relationship for a small, well‐confined, rectangular sample of fine sand was obtained under different water flow conditions. Water contents were measured by a gamma system and pressure heads were measured by a tensiometer‐pressure transducer combination. During drying, more water was retained in the sand at a given pressure head in the unsteady flow case than in the static equilibrium and steady‐state cases, which agreed with each other.