Reconstructing recent sedimentation in two urbanised coastal lagoons (NSW, Australia) using radioisotopes and geochemistry

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dc.contributor.authorHollins, SEen_AU
dc.contributor.authorHarrison, JJen_AU
dc.contributor.authorJones, BGen_AU
dc.contributor.authorZawadzki, Aen_AU
dc.contributor.authorHeijnis, Hen_AU
dc.contributor.authorHankin, SIen_AU
dc.date.accessioned2012-04-19T01:56:52Zen_AU
dc.date.available2012-04-19T01:56:52Zen_AU
dc.date.issued2011-12-01en_AU
dc.date.statistics2012-04-19en_AU
dc.description.abstractIn this study, we combined grain size and geochemical analyses with radioisotope analysis of lead-210 ((210)Pb), caesium-137 ((137)Cs) and radiocarbon ((14)C) ages to reconstruct the sedimentation history of two urbanised coastal lagoons in south-east Australia. Towradgi and Fairy Lagoons were both found to exhibit slow initial sedimentation of less than 1 mm year(-1) prior to anthropogenic influences. Land clearing in the catchments increased runoff and erosion in the creeks feeding into the estuaries, and has resulted in progradation of fluvial material into the estuarine systems with a marked increase in sedimentation to between 2 and 7 mm year(-1). The upper 20-50 cm of the sediment column in both lagoons contained elevated concentrations of heavy metals such as Pb, Cu, Ni and Zn. This pollution trend was found to be consistent with the history of industrialisation and urbanisation in the region, which expanded rapidly post World War 2. The total metal concentrations were consistent with other urbanised/industrialised estuaries around the world. Despite the fairly disturbed nature of these coastal lagoons, the use of (210)Pb, (137)Cs and (14)C dating in combination with bulk geochemical analyses allowed detailed reconstruction of sedimentation history. © 2011, Springer. The original publication is available at www.springerlink.comen_AU
dc.identifier.citationHollins, S. E., Harrison, J. J., Jones, B. G., Zawadzki, A., Heijnis, H., & Hankin, S. (2011). Reconstructing recent sedimentation in two urbanised coastal lagoons (NSW, Australia) using radioisotopes and geochemistry. Journal of Paleolimnology, 46(4), 579-596. doi:10.1007/s10933-011-9555-4en_AU
dc.identifier.govdoc4102en_AU
dc.identifier.issn0921-2728en_AU
dc.identifier.issue4en_AU
dc.identifier.journaltitleJournal of Paleolimnologyen_AU
dc.identifier.pagination579-596en_AU
dc.identifier.urihttp://dx.doi.org/10.1007/s10933-011-9555-4en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/4173en_AU
dc.identifier.volume46en_AU
dc.language.isoenen_AU
dc.publisherSpringeren_AU
dc.subjectSedimentationen_AU
dc.subjectRadioisotopesen_AU
dc.subjectNew South Walesen_AU
dc.subjectGeochemistryen_AU
dc.subjectHeavy metalsen_AU
dc.subjectContaminationen_AU
dc.titleReconstructing recent sedimentation in two urbanised coastal lagoons (NSW, Australia) using radioisotopes and geochemistryen_AU
dc.typeJournal Articleen_AU
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