The effect of hysteresis on three-dimensional transient water flow during surface trickle irrigation

dc.contributor.author	Elmaloglou, S	en
dc.contributor.author	Diamantopoulos, E	en
dc.date.accessioned	2014-06-06T06:48:45Z
dc.date.available	2014-06-06T06:48:45Z
dc.date.issued	2008	en
dc.identifier.issn	15310353	en
dc.identifier.uri	http://dx.doi.org/10.1002/ird.353	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/4254
dc.subject	Deep percolation	en
dc.subject	Evaporation	en
dc.subject	Hysteresis	en
dc.subject	Irrigation duration	en
dc.subject	Irrigation efficiency	en
dc.subject	Mathematical modelling	en
dc.subject	Trickle irrigation	en
dc.subject	USDA soil classes	en
dc.subject	Water extraction	en
dc.title	The effect of hysteresis on three-dimensional transient water flow during surface trickle irrigation	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/ird.353	en
heal.publicationDate	2008	en
heal.abstract	The effect of hysteresis on deep percolation, irrigation efficiency and soil water content profiles by surface point sources was studied through the use of a cylindrical flow model which incorporates hysteresis in the soil water characteristic curve (Scott et al., 1983), evaporation from the soil surface and water extraction by roots. Several combinations of discharge rate and irrigation durations were tested. The dripper spacing was 60 × 60 cm. The implementation of the mathematical model took place against two of the twelve USDA soil classes. Water content profiles are presented for a radial distance of 1, 17 and 32.8 cm from the point source and for various times. The results show that hysteresis seems to reduce the water losses under the root zone at the end of the simulation time to a great extent. In addition, it was found that hysteresis reduced the deep percolation more in the coarse-grained soil than in the fine-grained soil. Finally, for both soils hysteresis increased the irrigation efficiency. Copyright © 2008 John Wiley & Sons, Ltd.	en
heal.journalName	Irrigation and Drainage	en
dc.identifier.issue	1	en
dc.identifier.volume	57	en
dc.identifier.doi	10.1002/ird.353	en
dc.identifier.spage	57	en
dc.identifier.epage	70	en