Sediment cores as archives of historical changes in floodplain lake hydrology

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dc.contributor.authorLintern, Aen_AU
dc.contributor.authorLeahy, PJen_AU
dc.contributor.authorZawadzki, Aen_AU
dc.contributor.authorGadd, PSen_AU
dc.contributor.authorHeijnis, Hen_AU
dc.contributor.authorJacobsen, GEen_AU
dc.contributor.authorConnor, SEen_AU
dc.contributor.authorDeletic, Aen_AU
dc.contributor.authorMcCarthy, DTen_AU
dc.date.accessioned2016-02-01T04:36:57Zen_AU
dc.date.available2016-02-01T04:36:57Zen_AU
dc.date.issued2016-02-15en_AU
dc.date.statistics2016-02-01en_AU
dc.description.abstractAnthropogenic activities are contributing to the changing hydrology of rivers, often resulting in their degradation. Understanding the drivers and nature of these changes is critical for the design and implementation of effective mitigation strategies for these systems. However, this can be hindered by gaps in historical measured flow data. This study therefore aims to use sediment cores to identify historical hydrological changes within a river catchment. Sediment cores from two floodplain lakes (billabongs) in the urbanised Yarra River catchment (Melbourne, South-East Australia) were collected and high resolution images, trends in magnetic susceptibility and trends in elemental composition through the sedimentary records were obtained. These were used to infer historical changes in river hydrology to determine both average trends in hydrology (i.e., coarse temporal resolution) as well as discrete flood layers in the sediment cores (i.e., fine temporal resolution). Through the 20th century, both billabongs became increasingly disconnected from the river, as demonstrated by the decreasing trends in magnetic susceptibility, particle size and inorganic matter in the cores. Additionally the number of discrete flood layers decreased up the cores. These reconstructed trends correlate with measured flow records of the river through the 20th century, which validates the methodology that has been used in this study. Not only does this study provide evidence on how natural catchments can be affected by land-use intensification and urbanisation, but it also introduces a general analytical framework that could be applied to other river systems to assist in the design of hydrological management strategies. © 2015, Elsevier B.V.en_AU
dc.identifier.citationLintern, A., Leahy, P. J., Zawadzki, A., Gadd, P., Heijnis, H., Jacobsen, G., Connor, S., Deletic, A., & McCarthy, D. T. (2016). Sediment cores as archives of historical changes in floodplain lake hydrology. Science of The Total Environment, 544, 1008-1019. doi:10.1016/j.scitotenv.2015.11.153en_AU
dc.identifier.govdoc6400en_AU
dc.identifier.issn0048-9697en_AU
dc.identifier.journaltitleScience of The Total Environmenten_AU
dc.identifier.pagination1008-1019en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.scitotenv.2015.11.153en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/6577en_AU
dc.identifier.volume544en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectSedimentsen_AU
dc.subjectClimatic changeen_AU
dc.subjectHydrologyen_AU
dc.subjectHistorical aspectsen_AU
dc.subjectSedimentsen_AU
dc.subjectLakesen_AU
dc.titleSediment cores as archives of historical changes in floodplain lake hydrologyen_AU
dc.typeJournal Articleen_AU
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