Show simple item record

dc.contributor.authorYu, Bofuen_US
dc.date.accessioned2017-04-24T10:54:48Z
dc.date.available2017-04-24T10:54:48Z
dc.date.issued1999en_US
dc.identifier.issn00012351en_US
dc.identifier.doi10.13031/2013.13212en_US
dc.identifier.urihttp://hdl.handle.net/10072/31143
dc.description.abstractRainfall-runoff data collected from bare plots (20-216 m2) at 1-min intervals were used to compare the performance of the Green-Ampt infiltration model and a spatially variable infiltration model (SVIM). The two models have the same number of parameters. For 60 natural storm events from six sites in Australia and South-East Asian countries, the average Nash-Sutcliffe model efficiency was 0.77 for the Green-Ampt model and 0.83 for the SVIM. At all sites, the SVIM consistently outperformed the Green-Ampt model when compared to runoff data at a range of time intervals and storm events, including events of very long duration. A larger hydrologic lag is needed for the Green-Ampt model to fit the measured hydrographs in comparison to the SVIM, suggesting that the Green-Ampt model tends to underestimate the infiltration rate when rainfall intensity is high. Measured rainfall and runoff rates show a positive relationship between rainfall intensity and infiltration rate. Considerable spatial variability in the infiltration capacity at the plot scale is implied by this positive relationship. This spatial variability clearly needs to be accommodated in infiltration models, and the SVIM represents a simple formulation of the infiltration rate as a function of rainfall intensity to address this spatial variability. SVIM parameters can be related to the Green-Ampt parameters, and they could therefore be estimated directly using soil properties.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_US
dc.format.extent3755750 bytes
dc.format.extent9 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypetext/plain
dc.languageEnglishen_US
dc.language.isoen_US
dc.publisherAmerican Society of Agricultural Engineersen_US
dc.publisher.placeUSAen_US
dc.relation.ispartofpagefrom89en_US
dc.relation.ispartofpageto97en_US
dc.relation.ispartofjournalTransactions of the ASAEen_US
dc.relation.ispartofvolume42(1)en_US
dc.titleA Comparison of Green-Ampt and a Spatially Variable Infiltration Model for Natural Storm Eventsen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.facultyGriffith Sciences, Griffith School of Engineeringen_US
gro.rights.copyrightCopyright 1999 American Society of Agricultural and Biological Engineers (ASABE). The attached file is reproduced here in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.en_US
gro.date.issued2015-05-25T05:12:43Z
gro.hasfulltextFull Text


Files in this item

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record