Eliminating the effect of temperature from unsaturated soil hydraulic functions

Giakoumakis, SG; Tsakiris, GP

dc.contributor.author	Giakoumakis, SG	en
dc.contributor.author	Tsakiris, GP	en
dc.date.accessioned	2014-03-01T01:08:21Z
dc.date.available	2014-03-01T01:08:21Z
dc.date.issued	1991	en
dc.identifier.issn	0022-1694	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/10429
dc.subject	Unsaturated Soil	en
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.classification	Water Resources	en
dc.subject.other	Flow of Water--Measurements	en
dc.subject.other	Flow of Water--Thermal Effects	en
dc.subject.other	Fluid Mechanics--Mathematical Models	en
dc.subject.other	Soils--Moisture	en
dc.subject.other	Hydraulic Conductivity	en
dc.subject.other	Matric Potential	en
dc.subject.other	Soils	en
dc.subject.other	Gain factor model	en
dc.subject.other	hydraulic conductivity	en
dc.subject.other	matric potential	en
dc.subject.other	soil hydraulic function	en
dc.subject.other	soil temperature	en
dc.subject.other	soil water content	en
dc.subject.other	surface tension viscous flow model	en
dc.subject.other	unsaturated flow	en
dc.title	Eliminating the effect of temperature from unsaturated soil hydraulic functions	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0022-1694(91)90047-L	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0022-1694(91)90047-L	en
heal.language	English	en
heal.publicationDate	1991	en
heal.abstract	The effect of temperature in soil-water transfer studies is usually neglected. However, experimental research has shown that there is a strong temperature effect on the characteristic soil hydraulic functions, such as the matric potential versus water content relationship, h(theta), and the hydraulic conductivity versus water content relationship, K(theta). The objective of this study was to examine whether this effect can be isolated and explained. For this purpose, experimental h(theta) and K(theta) values from two different sandy soils at temperatures of 20,8 and 3-degrees-C, were directly compared with predictions obtained by both the surface-tension viscous-flow model of soil moisture movement (STVF) and the empirical Gain factor model extended to include the K(theta) relationship. Results showed that the predictive efficiency of the STVF method depends upon the soil type. For fine-textured material the Gain factor model seemed to perform satisfactorily. Finally, it was shown that unique normalized functions of both characteristic soil hydraulic properties, independent of temperature, can always be obtained.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Journal of Hydrology	en
dc.identifier.doi	10.1016/0022-1694(91)90047-L	en
dc.identifier.isi	ISI:A1991GZ66000007	en
dc.identifier.volume	129	en
dc.identifier.issue	1-4	en
dc.identifier.spage	109	en
dc.identifier.epage	125	en