Contrasting sedimentation rates in Lake Illawarra and St Georges Basin, two large barrier estuaries on the southeast coast of Australia

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dc.contributor.authorSloss, CRen_AU
dc.contributor.authorJones, BGen_AU
dc.contributor.authorBrooke, BPen_AU
dc.contributor.authorHeijnis, Hen_AU
dc.contributor.authorMurray-Wallace, CVen_AU
dc.date.accessioned2012-04-18T04:07:04Zen_AU
dc.date.available2012-04-18T04:07:04Zen_AU
dc.date.issued2011-12-01en_AU
dc.date.statistics2011-04-18en_AU
dc.description.abstractSedimentation rates over the last 100 years within two lagoons on the southeast coast of Australia, Lake Illawarra and St Georges Basin, have been quantified to determine the effects of catchment land use change and native vegetation clearance on infill rates, and spatial variations in the rate at which the estuaries have filled. Both catchments have similar lake and catchment area but have experience different degrees of modification due to land clearing for agriculture practices, urbanisation and industrialisation. Results indicate that in the heavily modified catchment of Lake Illawarra sedimentation rates close to fluvial deltas can be in excess of 16 mm/year, and between 2 and 4 mm/year in the adjacent central basin. This is approximately an order of magnitude greater than the pre-European rates. In contrast, at St Georges Basin, where the catchment has experienced much less modification, sedimentation rates in the central basin appear to have remained close to those prior to European settlement. However, sedimentation rates in the urbanized margin of St Georges Basin are relatively high (up to 4.4 mm/year). This rapid modern sedimentation in the margin of the estuarine embayments has been detected in several other estuaries in the region. However the degree of sedimentation within the bay-head deltas, and more significantly in the central basin appears proportional to the degree clearance of native vegetation (forest) in the catchment, urban expansion and development of heavy industry in the respective catchment areas. © 2011, Springer.en_AU
dc.identifier.citationSloss, C.R., Jones, B.G., Brooke, B.P., Heijnis, H., & Murray-Wallace, C.V., (2011). Contrasting sedimentation rates in Lake Illawarra and St Georges Basin, two large barrier estuaries on the southeast coast of Australia. Journal of Paleolimnology, 46(4), 561-577. doi:10.1007/s10933-011-9507-zen_AU
dc.identifier.govdoc3702en_AU
dc.identifier.issn0921-2728en_AU
dc.identifier.issue4en_AU
dc.identifier.journaltitleJournal of Paleolimnologyen_AU
dc.identifier.pagination561-577en_AU
dc.identifier.urihttp://dx.doi.org/10.1007/s10933-011-9507-zen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/4151en_AU
dc.identifier.volume46en_AU
dc.language.isoenen_AU
dc.publisherSpringeren_AU
dc.subjectAustraliaen_AU
dc.subjectSedimentationen_AU
dc.subjectEstuariesen_AU
dc.subjectRacemizationen_AU
dc.subjectAmino acidsen_AU
dc.subjectAge estimationen_AU
dc.titleContrasting sedimentation rates in Lake Illawarra and St Georges Basin, two large barrier estuaries on the southeast coast of Australiaen_AU
dc.typeJournal Articleen_AU
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