Neutron imaging of recurrent ponded infiltration into heterogeneous soil

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F12%3A00201332" target="_blank" >RIV/68407700:21110/12:00201332 - 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

Neutron imaging of recurrent ponded infiltration into heterogeneous soil

Popis výsledku v původním jazyce

Ponded infiltration is a hydrological process in which water remaining at the soil surface infiltrates under positive pressures into the soil profile which becomes nearly or fully saturated. For most natural sites this condition occurs only for a short period of time, mostly during extreme precipitations, still a large fraction of the total water and chemical fluxes in the soil profile are transferred during these events. Under the close-to-saturation conditions, a preferential flow may take place in heterogeneous soils. There is also the experimental evidence that a significant steady state flow rate drop may occur during a recurrent ponded infiltration indicating changes/instability of the saturated hydraulic conductivity of soil (Cislerova et al, 1988). These variations are often ascribed to a changing fraction of the entrapped air. The effect is not considered in standard theory of water flow in porous media. In presented study we were able to reproduce variation of quasi steady st

Název v anglickém jazyce

Neutron imaging of recurrent ponded infiltration into heterogeneous soil

Popis výsledku anglicky

Ponded infiltration is a hydrological process in which water remaining at the soil surface infiltrates under positive pressures into the soil profile which becomes nearly or fully saturated. For most natural sites this condition occurs only for a short period of time, mostly during extreme precipitations, still a large fraction of the total water and chemical fluxes in the soil profile are transferred during these events. Under the close-to-saturation conditions, a preferential flow may take place in heterogeneous soils. There is also the experimental evidence that a significant steady state flow rate drop may occur during a recurrent ponded infiltration indicating changes/instability of the saturated hydraulic conductivity of soil (Cislerova et al, 1988). These variations are often ascribed to a changing fraction of the entrapped air. The effect is not considered in standard theory of water flow in porous media. In presented study we were able to reproduce variation of quasi steady st

Druh

O - Ostatní výsledky

CEP obor

DA - Hydrologie a limnologie

OECD FORD obor

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Projekt

<a href="/cs/project/GA103%2F08%2F1552" target="_blank" >GA103/08/1552: Proudění vody a transport rozpuštěných látek v pórovitém prostředí za přítomnosti nespojité plynné fáze</a><br>

Návaznosti

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

Rok uplatnění

2012

Kód důvěrnosti údajů

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