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Temperature and Time of Day Influence on Double‐Ring Infiltrometer Steady‐State Infiltration Rates
Author(s) -
Clancy Katherine,
Alba Veronica M.
Publication year - 2011
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/sssaj2009.0355n
Subject(s) - infiltrometer , loam , morning , soil water , chemistry , infiltration (hvac) , zoology , mineralogy , soil science , environmental science , thermodynamics , hydraulic conductivity , physics , biology , botany
Steady‐state infiltration rates (IRs) correlate well with temperature. They have been observed, however, to have values 1.5 to 2.5 times higher than predicted by viscosity, known as the t ‐ effect Many field studies that have observed the t‐effect used continuous IR measurement systems. We measured 67 IRs using double‐ring infiltrometers (DRIs) during the 2007 and 2008 autumn seasons in sand and loamy sand soils across a temperature range of 5 to 35°C. We found above‐average to good correlation between temperature and IR. For loamy sand ( n = 17), IR rate differences were accounted for by viscosity differences, but for sand ( n = 30) the IR values were 2.0 to 2.9 times higher than the viscosity‐predicted rate. Additionally, we found a difference in the IR temperature regressions based on the time of day of the measurements in the sand. Morning measurements were two times the viscosity‐predicted IR, while afternoon measurements were nearly three times. This research corroborates other field studies that observed the t‐effect using DRIs.