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dc.contributor.authorWu, Jiaxueen_US
dc.contributor.authorAmetistova, Lioudmilaen_US
dc.contributor.authorHeron, Malcolmen_US
dc.contributor.authorLemckert, Charlesen_US
dc.contributor.authorKalangi, Patriceen_US
dc.date.accessioned2017-04-24T10:36:43Z
dc.date.available2017-04-24T10:36:43Z
dc.date.issued2006en_US
dc.date.modified2009-09-02T07:43:02Z
dc.identifier.issn01480227en_US
dc.identifier.doi10.1029/2005JC003404en_AU
dc.identifier.urihttp://hdl.handle.net/10072/14427
dc.description.abstractThis paper investigates the dynamics of an internal hydraulic jump in a river plume and associated suspended sediment dispersal. Field investigations were undertaken into the river plume generated by the Herbert River, Australia, following a moderate flood event induced by Cyclone Fritz in 2004. The forced plume experiences an abrupt transition from supercritical to subcritical via an internal hydraulic jump, as defined by a mode-1 internal Froude number computed using the phase speeds from the Taylor- Goldstein equation. The hydraulic theory of a two-layer stratified flow was used to identify the plume shape and the mechanical energy loss within the jump. The hydraulic jump energy loss is primarily transferred to the buoyancy-driven potential energy, uplifting the river plume. Intense stratification decreases the bottom stress, damping the resuspension. Therefore, a separative nepheloid dispersal system occurs at the jump section. Both the upper and lower nepheloid flows are confined to the inner shelf, but have different dispersal behaviors and mechanisms. The upper nepheloid flow, which is primarily controlled by advection and settling, satisfies an exponential decay law of the total suspended sediment concentrations versus the offshore distance. The lower nepheloid flow dominated by deposition is detached seaward near the lift-off point of the river plume. A turbidity front associated with the jump may accumulate a large quantity of suspended sediments, enhancing sediment release from the river plume. These findings will promote in-depth understanding of both the cross-shelf sediment dispersal and muddy deposit on the shelf.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherAmerican Geophysical Unionen_US
dc.publisher.placeUSAen_US
dc.publisher.urihttp://www.agu.org/pubs/en_AU
dc.relation.ispartofstudentpublicationNen_AU
dc.relation.ispartofpagefrom1en_US
dc.relation.ispartofpageto20en_US
dc.relation.ispartofjournalJournal of Geophysical Researchen_US
dc.relation.ispartofvolume111en_US
dc.rights.retentionYen_AU
dc.subject.fieldofresearchcode260403en_US
dc.titleFinite dispersal of a separative nepheloid plume by an internal hydraulic jump in a tropical mountainous river estuaryen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.rights.copyrightCopyright 2006 American Geophysical Union. Please refer to the journal link for access to the definitive, published version.en_AU
gro.date.issued2006
gro.hasfulltextNo Full Text


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