A comparison of measurement techniques for determining unsaturated soil hydraulic properties

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41210%2F03%3A00005381" target="_blank" >RIV/60460709:41210/03:00005381 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
A comparison of measurement techniques for determining unsaturated soil hydraulic properties
Original language description
Using several test methods, unsaturated and saturated soil hydraulic properties were determined adn compared for three uniform sandy soils at adjacent field sites. Drying soil-water retention curves were measured on undisturbed soil specimens using a pressure plate apparatus, and wtting soil-water retention curves of disturbed specimens were measured via capillary rise experiments in the laboratory. The saturated hydraulic conductivities (Ks) were measured in situ with a Guelph in -situ cone permeameterand in the laboratory with falling hed tests. Finally, to analyze transient flow data from in - situ cone permeameter and laboratry multistep outflow/inflow experiments, parameter optimization techniques were used to simultaneously estimate the drying and wetting soil-water retention and hydraulic conductivity curves. Ks values from all test methods were within an order of magnitude of each other at each site and, as expected, trended with bulk density. The Quelph permeameter generally
Czech name
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Czech description
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Publication year
2003
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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