Tracing the entrapped air in heterogeneous soil by means of magnetic resonance imaging
Result description
Magnetic resonance imaging (MRI) was used to study the process of infiltration in an undisturbed core of coarse sandy loam during a repeated ponded infiltration experiment (RPI), in which the first infiltration was conducted into a naturally dry sample and the second infiltration into a wet sample. The primary aim was to assess the change in distribution of entrapped air in the undisturbed soil sample and its influence on steady-state flow rates. Concurrently with the MRI monitoring, pressure heads andfluxes were measured. Multiple-slice maps of longitudinal relaxivity (T1), which is a parameter related to the surface/ volume ratio, and proton density (M0), related to the water content, covered almost the entire volume of the sample. The drop in the quasi-steady-state flow rate that was observed between the first and second infitlration runs corresponded to the decline in T1 and M0 in the upper 4 cm of the sample.
Keywords
preferential flowentrapped airresidual airhydraulic conductivitymagnetic resonance imaging
The result's identifiers
Result code in IS VaVaI
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Tracing the entrapped air in heterogeneous soil by means of magnetic resonance imaging
Original language description
Magnetic resonance imaging (MRI) was used to study the process of infiltration in an undisturbed core of coarse sandy loam during a repeated ponded infiltration experiment (RPI), in which the first infiltration was conducted into a naturally dry sample and the second infiltration into a wet sample. The primary aim was to assess the change in distribution of entrapped air in the undisturbed soil sample and its influence on steady-state flow rates. Concurrently with the MRI monitoring, pressure heads andfluxes were measured. Multiple-slice maps of longitudinal relaxivity (T1), which is a parameter related to the surface/ volume ratio, and proton density (M0), related to the water content, covered almost the entire volume of the sample. The drop in the quasi-steady-state flow rate that was observed between the first and second infitlration runs corresponded to the decline in T1 and M0 in the upper 4 cm of the sample.
Czech name
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Czech description
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Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DA - Hydrology and limnology
OECD FORD branch
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Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2010
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Vadose Zone Journal
ISSN
1539-1663
e-ISSN
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Volume of the periodical
9
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
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UT code for WoS article
000277718000017
EID of the result in the Scopus database
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Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
DA - Hydrology and limnology
Year of implementation
2010