Mobilisation, alternation, and redistribution of monosulfidic sediments in inland river systems

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dc.contributor.authorCheetham, MDen_AU
dc.contributor.authorWong, VNen_AU
dc.contributor.authorBush, RTen_AU
dc.contributor.authorSullivan, LAen_AU
dc.contributor.authorWard, NJen_AU
dc.contributor.authorZawadzki, Aen_AU
dc.date.accessioned2013-03-06T04:35:53Zen_AU
dc.date.available2013-03-06T04:35:53Zen_AU
dc.date.issued2012-12-15en_AU
dc.date.statistics2013-03-06en_AU
dc.description.abstractThe accumulation of monosulfidic sediments in inland waterways is emerging as a major environmental issue. Mobilisation and suspension of monosulfidic sediments can result in deoxygenation, acidification of the water column and mobilisation of trace metals. The controls on monosulfidic sediment mobilisation and the critical thresholds for its scour and entrainment have not been established. This study examines the effect of a minor flood event (average return interval of 5 years) on sulfidic sediment scour in the Wakool River in southern NSW, Australia. Five profiles were sampled within a small (similar to 300 m) reach before and after a minor flood event to determine the degree of sediment scour and transport. The results indicate substantial scour of both monosulfidic sediments and underlying bed sediments (approximately 2100 m(3)). Changes in the sediment geochemistry suggest large concentrations of monosulfidic sediments had been suspended in the water column, partially-oxidised and redeposited. This is supported by Pb-210 results from one of the profiles. These results suggest that these monosulfidic sediments can move as bed load during minor flood events. (C) 2012 Elsevier Ltd. All rights reserved.en_AU
dc.identifier.citationCheetham, M.D., Wong, V.N.L., Bush, R.T., Sullivan, L.A., Ward, N.J., & Zawadzki, A. (2012). Mobilisation, alteration, and redistribution of monosulfidic sediments in inland river systems. Journal of Environmental Management, 112, 330-339. doi:10.1016/j.jenvman.2012.08.015en_AU
dc.identifier.govdoc4864en_AU
dc.identifier.issn0301-4797en_AU
dc.identifier.journaltitleJournal of Environmental Managementen_AU
dc.identifier.pagination330-339en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.jenvman.2012.08.015en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/4494en_AU
dc.identifier.volume112en_AU
dc.language.isoenen_AU
dc.publisherAcademic Press Ltd- Elsevier Science Ltden_AU
dc.subjectSulfidesen_AU
dc.subjectSedimentsen_AU
dc.subjectSulfuren_AU
dc.subjectIronen_AU
dc.subjectBuildupen_AU
dc.subjectWateren_AU
dc.titleMobilisation, alternation, and redistribution of monosulfidic sediments in inland river systemsen_AU
dc.typeJournal Articleen_AU
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