Assessing soil remobilisation in catchments using a 137Cs-sediment hillslope model

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dc.contributor.authorSimms, ADen_AU
dc.contributor.authorWoodroffe, CDen_AU
dc.contributor.authorJones, BGen_AU
dc.contributor.authorHeijnis, Hen_AU
dc.contributor.authorHarrison, JJen_AU
dc.contributor.authorMann, RAen_AU
dc.date.accessioned2009-11-02T03:05:23Zen_AU
dc.date.accessioned2010-04-30T05:05:31Zen_AU
dc.date.available2009-11-02T03:05:23Zen_AU
dc.date.available2010-04-30T05:05:31Zen_AU
dc.date.issued2008-12en_AU
dc.date.statistics2008-12en_AU
dc.description.abstractSoil redistribution studies are important, especially in water supply catchments, because the rate at which denudation is occurring has implications for offsite water quality. However, the extent to which soil is redistributed within the landscape can be difficult to determine. This challenge can be overcome using fallout caesium-137 (137Cs). This paper describes the rates of soil loss and remobilisation in two sub-catchments within the Sydney Basin region, namely Kembla and Kentish Creeks, which drain to the Cordeaux reservoir. The total inventories of 137Cs in catchment soils were determined, a 137Cs-regression equation and a theoretical diffusion and migration model were used to established relationships between 137Cs inventories and the rates of soil loss. These relationships revealed relatively low occurrence of soil loss in Kentish Creek, but two slopes in the Kembla Creek sub-catchment had losses that appear to be moderate. However, there was no clear evidence to suggest whether slopes in upper and lower reaches of catchments had specific patterns of soil remobilisation. Qualitative categorisation of the slope elements using a 137Cs-sediment hillslope model can be a useful sentinel for land users and decision makers even if absolute rates of soil loss or gain are not certain. The findings suggest that sediments mobilised in the study sub-catchments are not likely to impact significantly on the water quality in the Cordeaux reservoir. © 2008, Taylor & Francis (Routledge).en_AU
dc.identifier.citationSimms, A. D., Woodroffe, C., Jones, B. G., Heijnis, H., Harrison, J., & Mann, R. A. (2008). Assessing soil remobilisation in catchments using a 137Cs-sediment hillslope model. Australian Geographer, 39(4), 445-465. doi:10.1080/00049180802419187en_AU
dc.identifier.govdoc1357en_AU
dc.identifier.issn0004-9182en_AU
dc.identifier.issue4en_AU
dc.identifier.journaltitleAustralian Geographeren_AU
dc.identifier.pagination445-465en_AU
dc.identifier.urihttp://dx.doi.org/10.1080/00049180802419187en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/2150en_AU
dc.identifier.volume39en_AU
dc.language.isoenen_AU
dc.publisherTaylor & Francis (Routledge)en_AU
dc.subjectWater supplyen_AU
dc.subjectWatershedsen_AU
dc.subjectCesium 137en_AU
dc.subjectSoilsen_AU
dc.subjectErosionen_AU
dc.subjectSedimentsen_AU
dc.titleAssessing soil remobilisation in catchments using a 137Cs-sediment hillslope modelen_AU
dc.typeJournal Articleen_AU
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