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dc.contributor.authorJoo, M.en_US
dc.contributor.authorYu, Bofuen_US
dc.contributor.authorFentie, B.en_US
dc.contributor.authorCarroll, C.en_US
dc.contributor.editorAndre Zerger and Robert M. Argenten_US
dc.date.accessioned2017-04-24T09:09:22Z
dc.date.available2017-04-24T09:09:22Z
dc.date.issued2005en_US
dc.date.modified2009-08-31T21:51:44Z
dc.identifier.doihttp://www.mssanz.org.au/modsim05/index.htmen_AU
dc.identifier.urihttp://hdl.handle.net/10072/2730
dc.description.abstractWith a catchment area of nearly 140,000 km2, the Fitzroy discharges a significant amount of sediment to the Great Barrier Reef lagoon. Sediment discharge is related to water turbidity which has a direct impact on coastal ecosystems. Previous estimates of the long-term average sediment load of the Fitzroy vary greatly 1.3 - 2.5 Mt (1 Mt = 109 kg). These estimates, however, were mostly based on an extrapolation of sediment loads from other catchments in Queensland. In addition, sediment loads from major tributaries of the Fitzroy have not been assessed for internal consistency in the estimated sediment loads. Measured total suspended solids (TSS) concentrations from six sites in the Fitzroy were used to develop sediment rating curves. Sediment rating curves were corrected using smearing estimates to remove an inherent bias as a result of log-transformation. These rating curves combined with streamflow data were used to estimate long-term mean annual sediment load of the Fitzroy and its main tributaries for a common 30-year period 1974-2003. Sediment rating curves for the six sites show considerable similarity, and variation in sediment discharge at given flow rates is considerably larger than between-site variations in the expected sediment discharge at the flow rate. The mean annual sediment load was estimated to be 3.09 Mt for the Fitzroy at the Gap for the 30-year period (see Table below). Most of the sediment of the Fitzroy comes from the Nogoa and Comet subcatchments. The combined loads of the four major tributaries are consistent with the total load estimated for the Fitzroy at the Gap. Load estimated for the MacKenzie site appeared to be low. At given level of runoff, sediment concentration on average was highest for the Nogoa and Comet subcatchments, and the lowest for the Isaac. An intensified period of water quality monitoring since 1993 coincided with a period of relatively low streamflow. Flow for the period 1994-2003 was about half, on average, of the 30-year period investigated.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.format.extent1328760 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherModelling and Simulation Society of Australia and New Zealanden_US
dc.publisher.placeMelbourneen_US
dc.publisher.urihttp://www.mssanz.org.au/en_AU
dc.relation.ispartofstudentpublicationNen_AU
dc.relation.ispartofconferencenameMODSIM 2005en_US
dc.relation.ispartofconferencetitleMODSIM 2005 International Congress on Modelling and Simulation : Advances and Applications for Management and Decision Making : Proceedingsen_US
dc.relation.ispartofdatefrom2005-12-12en_US
dc.relation.ispartofdateto2005-12-15en_US
dc.relation.ispartoflocationMelbourneen_US
dc.rights.retentionYen_AU
dc.subject.fieldofresearchcode260502en_US
dc.titleEstimation Of Long-Term Sediment Loads In The Fitzroy Catchment, Queensland, Australia.en_US
dc.typeConference outputen_US
dc.type.descriptionE1 - Conference Publications (HERDC)en_US
dc.type.codeE - Conference Publicationsen_US
gro.rights.copyrightCopyright 2005 Modellling & Simulation Society of Australia & New Zealand. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the conference link for access to the definitive, published version.en_AU
gro.date.issued2005
gro.hasfulltextFull Text


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