Quick estimation of hydraulic conductivity in unsaturated sandy loam soil

Giakoumakis, SG; Tsakiris, GP

dc.contributor.author	Giakoumakis, SG	en
dc.contributor.author	Tsakiris, GP	en
dc.date.accessioned	2014-03-01T01:15:06Z
dc.date.available	2014-03-01T01:15:06Z
dc.date.issued	1999	en
dc.identifier.issn	01686291	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13340
dc.subject	Gardner's equation	en
dc.subject	Hydraulic conductivity	en
dc.subject	Unsaturated soil (vadose zone)	en
dc.subject.other	Hydraulic conductivity	en
dc.subject.other	Infiltration	en
dc.subject.other	Integral equations	en
dc.subject.other	Parameter estimation	en
dc.subject.other	Permeameters (mechanical permeability)	en
dc.subject.other	Steady flow	en
dc.subject.other	Gardner equation	en
dc.subject.other	Guelph permeameter	en
dc.subject.other	Unsaturated soil	en
dc.subject.other	Vadose zone	en
dc.subject.other	Volumetric plate extractor	en
dc.subject.other	Soils	en
dc.subject.other	hydraulic conductivity	en
dc.subject.other	infiltration	en
dc.subject.other	porous medium	en
dc.subject.other	unsaturated medium	en
dc.subject.other	hydraulic conductivity	en
dc.subject.other	infiltration	en
dc.subject.other	porous medium	en
dc.subject.other	unsaturated medium	en
dc.title	Quick estimation of hydraulic conductivity in unsaturated sandy loam soil	en
heal.type	journalArticle	en
heal.identifier.primary	10.1023/A:1006336429169	en
heal.identifier.secondary	http://dx.doi.org/10.1023/A:1006336429169	en
heal.publicationDate	1999	en
heal.abstract	Laboratory experiments were conducted for determining hydraulic conductivity during infiltration in an unsaturated sandy loam soil, using both steady state and equilibrium methods. A constant head Guelph permeameter and a volumetric pressure plate extractor were used. Based on two ponded heights in the permeameter, the parameters of Gardner's equation expressing the unsaturated hydraulic conductivity as a function of pressure head (i.e. the saturated hydraulic conductivity K(S) and the exponent α), were estimated simultaneously. Furthermore, it was found that the parameter α, could also be predicted from the soil-water retention curve based on equilibrium data obtained from the extractor. This indicated that, for the soil type studied, one-ponded height in the permeameter method could be sufficient for the determination of the exponent α, provided that the soil-water retention curve is known.Laboratory experiments were conducted for determining hydraulic conductivity during infiltration in an unsaturated sandy loam soil, using both steady state and equilibrium methods. A constant head Guelph permeameter and a volumetric pressure plate extractor were used. Based on two ponded heights in the permeameter, the parameters of Gardner's equation expressing the unsaturated hydraulic conductivity as a function of pressure head (i.e. the saturated hydraulic conductivity KS and the exponent α), were estimated simultaneously. Furthermore, it was found that the parameter α, could also be predicted from the soil-water retention curve based on equilibrium data obtained from the extractor. This indicated that, for the soil type studied, one-ponded height in the permeameter method could be sufficient for the determination of the exponent α, provided that the soil-water retention curve is known.	en
heal.publisher	Kluwer Academic Publishers, Dordrecht, Netherlands	en
heal.journalName	Irrigation and Drainage Systems	en
dc.identifier.doi	10.1023/A:1006336429169	en
dc.identifier.volume	13	en
dc.identifier.issue	4	en
dc.identifier.spage	349	en
dc.identifier.epage	359	en