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Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F04%3A01107418" target="_blank" >RIV/68407700:21110/04:01107418 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

3D Flow of Water Through the Undisturbed Samples of Coarse Sandy Loam Visualized by MRI

Popis výsledku v původním jazyce

The filling of pores of undisturbed soil samples of coarse sandy loam was monitored under changing flow conditions using 3D nuclear magnetic resonance imaging (MRI). The soil under study represents a heterogeneous porous medium. The flow in the particular samples was imaged during recurrent ponded infiltration-outflow and tension infiltration-outflow experiments. Free outflow was used as the bottom boundary condition. Values of hydraulic pressure heads, sample weights and flow data were recorded duringthe experiments. At the saturation and near-saturation stages, significant preferential flow was observed together with the instability of steady state flow rates. From the MRI videos of water propagation throughout the samples it is evident, that the flow instability has been caused due to air phase redistribution. Questionable is the role of several order differences of local pore velocity values and its impact on the filling of the sample within the time scale of the experiment.

Název v anglickém jazyce

3D Flow of Water Through the Undisturbed Samples of Coarse Sandy Loam Visualized by MRI

Popis výsledku anglicky

The filling of pores of undisturbed soil samples of coarse sandy loam was monitored under changing flow conditions using 3D nuclear magnetic resonance imaging (MRI). The soil under study represents a heterogeneous porous medium. The flow in the particular samples was imaged during recurrent ponded infiltration-outflow and tension infiltration-outflow experiments. Free outflow was used as the bottom boundary condition. Values of hydraulic pressure heads, sample weights and flow data were recorded duringthe experiments. At the saturation and near-saturation stages, significant preferential flow was observed together with the instability of steady state flow rates. From the MRI videos of water propagation throughout the samples it is evident, that the flow instability has been caused due to air phase redistribution. Questionable is the role of several order differences of local pore velocity values and its impact on the filling of the sample within the time scale of the experiment.

Druh

A - Audiovizuální tvorba

CEP obor

DF - Pedologie

OECD FORD obor

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Projekt

<a href="/cs/project/SA%2F650%2F5%2F03" target="_blank" >SA/650/5/03: Labe IV</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2004

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

ISBN

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Místo vydání

Washington

Název nakladatele resp. objednatele

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Verze

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Identifikační číslo nosiče

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