Connecting the disconnected: longitudinal correlation of river terrace remnants

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dc.contributor.authorCheetham, MDen_AU
dc.contributor.authorKeene, AFen_AU
dc.contributor.authorErskine, WDen_AU
dc.contributor.authorBush, RTen_AU
dc.contributor.authorJacobsen, GEen_AU
dc.date.accessioned2025-01-14T04:49:10Zen_AU
dc.date.available2025-01-14T04:49:10Zen_AU
dc.date.issued2008-12-01en_AU
dc.date.statistics2025-01-14en_AU
dc.description.abstractTerrace sequences provide insights into flood plain development. Many studies have examined the cross-sectional morphology and correlation of terraces, but this is only part of the story. Longitudinal correlation can provide a far greater insight into flood plain development processes and the spatial significance of these processes. Here we examine flood plain development from the longitudinal correlation of river terrace sequences in a sand-dominated flood plain. The terrace remnants are discontinuous, having been separated longitudinally by the partial erosion of the flood plain. Terraces along the study reach ranged from recently abandoned (490 ± 60 yBP), poorly developed, vertically accreted flood plains to weathered, early Holocene deposits (10 050 ± 260 yBP). They occurred as inset, fill features which indicated successive phases of alluvial erosion and deposition as well as burial of previous terrace surfaces. Terrace morphology alone did not provide sufficient evidence of longitudinal correlation. Sedimentology and chronology were also vital in correlating these remnants. Four terraces (the Baramul Sequence) were identified in the reach showing progressively younger characteristics and ages. The longitudinal correlation of each discontinuous terrace remnant shows considerable variation over time in response to gradient changes, discharge, sediment size and stream sinuosity. Results show that climate and the local exceedence of geomorphic thresholds have influenced river terrace formation and highlight the significance of chronology in establishing longitudinal correlation of terrace remnants with varying morphology. The Baramul Sequence shows a progressive relative fall in bed-level and reduction in slope over the Holocene. This is likely to have been accompanied by progressive contraction of the channel and indicates a reduction in mean discharge over the last 6-7 ka. © 2008 IAHS Press.en_AU
dc.identifier.booktitleProceedings of the 2008 Symposium of the International Commission on Continental Erosion, Christchurch, New Zealand, 1-5 Decemberen_AU
dc.identifier.citationCheetham, M. D., Keene, A. F., Erskine, W. D., Bush, R. T., & Jacobsen, G. E. (2008). Connecting the disconnected: longitudinal correlation of river terrace remnants. Paper presented to the International Symposium on Sediment Dynamics in Changing Environments, 1-5 December 2008, Christchurch, New Zealand. In J. Schmidt, T. Cochrane, C. Phillips, S. Elliott, T. Davies, L. Basher (eds.), Proceedings of the 2008 Symposium of the International Commission on Continental Erosion, Christchurch, New Zealand, 1-5 December 2008, (Vol. 325, pp.123-129). Wallingford, UK : IAHS Press/en_AU
dc.identifier.conferenceenddate2008-12-05en_AU
dc.identifier.conferencenameInternational Symposium on Sediment Dynamics in Changing Environmentsen_AU
dc.identifier.conferenceplaceChristchurch, New Zealanden_AU
dc.identifier.conferencestartdate2008-12-01en_AU
dc.identifier.editorsJ. Schmidt, T. Cochrane, C. Phillips, S. Elliott, T. Davies, L. Basheren_AU
dc.identifier.isbn9781901502848en_AU
dc.identifier.issn0144-7815en_AU
dc.identifier.pagination123-129en_AU
dc.identifier.placeofpublicationWallingford, UKen_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15943en_AU
dc.identifier.volume325en_AU
dc.language.isoenen_AU
dc.publisherInternational Association of Hydrological Sciencesen_AU
dc.subjectRiversen_AU
dc.subjectMorphologyen_AU
dc.subjectSanden_AU
dc.subjectSedimentationen_AU
dc.subjectClimatesen_AU
dc.subjectFlow rateen_AU
dc.subjectAlluvial depositsen_AU
dc.subjectValleysen_AU
dc.subjectDepositionen_AU
dc.titleConnecting the disconnected: longitudinal correlation of river terrace remnantsen_AU
dc.typeConference Paperen_AU
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