Neutron radiography of preferential flow in near-saturated soil sample

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F15%3A00235551" target="_blank" >RIV/68407700:21110/15:00235551 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21720/15:00235551

Výsledek na webu

<a href="http://www.musis-workshop2015.uni-hannover.de/fileadmin/musis-workshop2015/MUSIS_2015_BOOKLET-8.pdf" target="_blank" >http://www.musis-workshop2015.uni-hannover.de/fileadmin/musis-workshop2015/MUSIS_2015_BOOKLET-8.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Neutron radiography of preferential flow in near-saturated soil sample

Popis výsledku v původním jazyce

A number of infiltration experiments has supplied the evidence that the validity of standard Richards theory of the flow in porous media has to be questioned in case of natural soils. Under near-saturated conditions the preferential flow and temporal instability of the saturated hydraulic conductivity has been detected. Water flow in an undisturbed sample of coarse sandy loam from Cambisol series containing naturally developed vertical macropore was investigated during recurrent ponding infiltration (RPI) experiments. Experiment consisted of two ponded infiltration runs, each followed by draining of the sample. Before the infiltration, the threedimensional neutron tomography (NT) image of the dry sample was acquired. The propagation of wetting front was documented by a sequence of neutron radiography (NR) images. Analysis of NR showed that water moved preferentially through the macropore at the approximate speed of 2 mm/sec, which was significantly faster than the 0.3 mm/sec wetting ad

Název v anglickém jazyce

Neutron radiography of preferential flow in near-saturated soil sample

Popis výsledku anglicky

A number of infiltration experiments has supplied the evidence that the validity of standard Richards theory of the flow in porous media has to be questioned in case of natural soils. Under near-saturated conditions the preferential flow and temporal instability of the saturated hydraulic conductivity has been detected. Water flow in an undisturbed sample of coarse sandy loam from Cambisol series containing naturally developed vertical macropore was investigated during recurrent ponding infiltration (RPI) experiments. Experiment consisted of two ponded infiltration runs, each followed by draining of the sample. Before the infiltration, the threedimensional neutron tomography (NT) image of the dry sample was acquired. The propagation of wetting front was documented by a sequence of neutron radiography (NR) images. Analysis of NR showed that water moved preferentially through the macropore at the approximate speed of 2 mm/sec, which was significantly faster than the 0.3 mm/sec wetting ad

Druh

O - Ostatní výsledky

CEP obor

DA - Hydrologie a limnologie

OECD FORD obor

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Projekt

<a href="/cs/project/GA14-03691S" target="_blank" >GA14-03691S: Izotermické a neizotermické proudění vody a transport látek v pórovitém prostředí v blízkosti nasycení</a><br>

Návaznosti

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

Rok uplatnění

2015

Kód důvěrnosti údajů

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