A comparison of measurement techniques for determining unsaturated soil hydraulic properties

Kód výsledku v 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>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

A comparison of measurement techniques for determining unsaturated soil hydraulic properties

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

A comparison of measurement techniques for determining unsaturated soil hydraulic properties

Popis výsledku anglicky

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

Druh

D - Stať ve sborníku

CEP obor

DF - Pedologie

OECD FORD obor

—

Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2003

Kód důvěrnosti údajů

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

Název statě ve sborníku

Sborník - Hydrologie půdy v malém povodí

ISBN

80-02-01586

ISSN

—

e-ISSN

—

Počet stran výsledku

8

Strana od-do

41-48

Název nakladatele

Ústav pro hydrodynamiku

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

15. 10. 2003

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

—