Assessment of various methods for the determination of hydraulic conductivities of two green roof substrates by steady state infiltration experiments

dc.contributor.author	Babilis, DJ	en
dc.contributor.author	Londra, PA	en
dc.date.accessioned	2014-06-06T06:51:12Z
dc.date.available	2014-06-06T06:51:12Z
dc.date.issued	2011	en
dc.identifier.issn	15310353	en
dc.identifier.uri	http://dx.doi.org/10.1002/ird.543	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/5383
dc.subject	Green roof	en
dc.subject	Unsaturated hydraulic conductivity	en
dc.subject	Water retention curve	en
dc.title	Assessment of various methods for the determination of hydraulic conductivities of two green roof substrates by steady state infiltration experiments	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/ird.543	en
heal.publicationDate	2011	en
heal.abstract	The unsaturated hydraulic conductivity as a function of water content, K(θ), of two substrates used in green roofs was calculated, using the equations of Jackson (1972), van Genuchten (1980) and Valiantzas (1989). The comparison of the three calculated functions of K(θ) with experimental data was done in an indirect way. The steady state water profiles, with constant infiltration rate of 5.5×10-6ms-1, were calculated using the three above-mentioned different K(θ) for each substrate. These profiles were compared to the experimental steady state water profiles shaped after the application of a constant rainfall of 5.5×10-6ms-1 in the laboratory. The comparison between the calculated and the experimental water profiles showed that the above-mentioned equations can be used for the calculation of K(θ) for low-depth substrates. The proposed method is a simple indirect method to compare the calculated K(θ) methods. © 2009 John Wiley & Sons, Ltd.	en
heal.journalName	Irrigation and Drainage	en
dc.identifier.issue	2	en
dc.identifier.volume	60	en
dc.identifier.doi	10.1002/ird.543	en
dc.identifier.spage	274	en
dc.identifier.epage	280	en