Show simple item record

dc.contributor.authorHussein, Janeten_US
dc.contributor.authorGhadiri, Hosseinen_US
dc.contributor.authorYu, Bofuen_US
dc.contributor.authorRose, Calvinen_US
dc.date.accessioned2017-05-03T14:33:07Z
dc.date.available2017-05-03T14:33:07Z
dc.date.issued2007en_US
dc.date.modified2011-05-04T09:49:34Z
dc.identifier.issn03615995en_US
dc.identifier.doi10.2136/sssaj2006.0276en_AU
dc.identifier.urihttp://hdl.handle.net/10072/16321
dc.description.abstractReduction of diffuse fluxes of sediments from catchments is frequently achieved through use of vegetative buffers, but the dynamics of this reduction are not fully understood. The physical processes involved in sediment deposition by a stiff grass buffer (hedge) at a low, subcritical, flow rate were therefore examined. Flow experiments were carried out in the Griffith University Tilting-Flume Simulated Rainfall facility using a 0.3 m width, vetiver hedge (Vetiveria zizaniodes L., sterile cultivar Monto) at 5% slope. Sediments comprising a sandy soil (Podzol) and red clay (Ferralsol) were introduced into the flow upstream of the buffer and the resultant hydrology, sediment deposition and outflow characteristics were measured. Flow retardation produced a backwater upstream of the vetiver hedge and sediment deposition varied with soil type in this backwater. The backwater region was greatly extended by the deposition process, increasing overall sediment trapping efficiency. Buffering action reduced mean sediment loads in the outflow to 3.2% and 6.0% of the inflow concentration for the Podzol and Ferralsol, respectively, with a significant difference (P<0.01) between the soils. In contrast to other buffer research where deposited sediments were coarsest upstream of the backwater, we found the coarsest particles at the downstream end for the Podzol and Ferralsol, indicating possible bedload movement in addition to the deposition/entrainment processes that dominate supercritical flow. The type of flow therefore affects the size distribution as well as the amount and efficiency of sediment deposition in front of vetiver hedges.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.format.extent746621 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherSoil Science Society of Americaen_US
dc.publisher.placeUnited Statesen_US
dc.publisher.urihttp://soil.scijournals.org/en_AU
dc.relation.ispartofstudentpublicationNen_AU
dc.relation.ispartofpagefrom1516en_US
dc.relation.ispartofpageto1523en_US
dc.relation.ispartofissue5en_US
dc.relation.ispartofjournalSoil Science Society of America Journalen_US
dc.relation.ispartofvolume71en_US
dc.rights.retentionYen_AU
dc.subject.fieldofresearchcode26502en_US
dc.subject.fieldofresearchcode300105en_US
dc.titleSediment retention by a stiff grass hedge under subcritical flow conditionsen_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 Environmenten_US
gro.rights.copyrightCopyright remains with the authors 2007 Griffith University. This is the author-manuscript version of this paper. It is posted here with permission of the copyright owners for your personal use only. No further distribution permitted.en_AU
gro.date.issued2007
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