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dc.contributor.authorLu, Huaen_US
dc.contributor.authorYu, Bofuen_US
dc.date.accessioned2017-05-03T12:11:40Z
dc.date.available2017-05-03T12:11:40Z
dc.date.issued2002en_US
dc.date.modified2010-07-06T06:59:38Z
dc.identifier.issn00049573en_US
dc.identifier.doi10.1071/SR01117en_AU
dc.identifier.urihttp://hdl.handle.net/10072/6723
dc.description.abstractSpatially distributed rainfall erosivity and its seasonal distribution are needed to use the revised universal soil loss equation (RUSLE) for erosion risk assessment at large scale. An erosivity model and 20-year daily rainfall data at 0.05࠲esolution were used to predict the R-factor and its monthly distribution for RUSLE in Australia. Predicted R-factor values were compared with those previously calculated using pluviograph data for 132 sites around Australia. The daily erosivity model was further evaluated for 43 sites where long-term pluviograph data were available. Predicted and calculated monthly distributions of the R-factor were compared for these 43 sites. For the 132 sites where R-factor values were compiled from previous investigations, the model efficiency was 0.81 with root mean squared error (rmse) of 1832 MJ.mm/(ha.h.year), or 47.5% of the mean for the 132 sites. For the additional 43 sites, the coefficient of efficiency was 0.93 with a 12.7 mm rainfall threshold, and 0.94 when all storms were included in the calculations. The rmse was 908 MJ.mm/(ha.h.year), or 28.6% of the mean for the 43 sites with a zero rainfall threshold. The prediction error for monthly distribution of the R-factor was 2.3% with a zero threshold and 2.5% with 12.7 mm threshold. This and previous studies have shown that the daily rainfall erosivity model can be used to accurately predict the R-factor and its seasonal distribution in Australia. Digital maps were produced showing the spatial and seasonal distribution of the R-factor at 0.05࠲esolution in Australia. These maps have been used to assess rill and sheet erosion rate at the continental scale.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherCSIROen_US
dc.publisher.placeMelbourne, Australiaen_US
dc.publisher.urihttp://www.publish.csiro.au/nid/84.htmen_AU
dc.relation.ispartofpagefrom887en_US
dc.relation.ispartofpageto901en_US
dc.relation.ispartofjournalAustralian Journal of Soil Researchen_US
dc.relation.ispartofvolume40en_US
dc.subject.fieldofresearchcode260599en_US
dc.titleSpatial and seasonal distribution of rainfall erosivity in Australiaen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.date.issued2002
gro.hasfulltextNo Full Text


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