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Rapid field measurement of air entry value and hydraulic conductivity of soil as significant parameters in flow system analysis
Author(s) -
Bouwer Herman
Publication year - 1966
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr002i004p00729
Subject(s) - infiltrometer , hydraulic conductivity , geotechnical engineering , conductivity , infiltration (hvac) , environmental science , soil science , soil water , hydrology (agriculture) , materials science , geology , chemistry , composite material
Field measurements of air entry value and hydraulic conductivity of soil are obtained with a covered cylinder infiltrometer equipped with standpipe and vacuum gage. Tests are normally completed in approximately 30 minutes. The resulting data are used to construct step functions relating hydraulic conductivity to (negative) soil water pressure for sorption and desorption. These functions may be used as simplified hydraulic conductivity characteristics to include negative‐pressure flow in the analysis of subsurface water movement. Several field and laboratory studies demonstrate the validity of the concepts and the technique.