Rehabilitation of an incised ephemeral stream in central New South Wales, Australia: Identification of incision causes, rehabilitation techniques and channel response

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dc.contributor.authorStreeton, Nicholas
dc.contributor.authorGreene, Richard
dc.contributor.authorMarchiori, Kim
dc.contributor.authorTongway, David
dc.contributor.authorCarnegie, M.D.
dc.date.accessioned2015-12-13T22:22:42Z
dc.date.issued2013
dc.date.updated2016-02-24T09:06:43Z
dc.description.abstractThe degradation of semiarid agricultural rangelands in Australia can be traced back to the 19th century when Europeans expanded into these areas. That environmental degradation remains today and continues to harm agricultural productivity. The rehabilitation of a strongly incised ephemeral stream, 'Spring Creek', in central New South Wales, as an example of what can be achieved readily by landowners, is described. The causes of environmental degradation and the main environmental factors leading to the stream erosion were identified, rehabilitation began and the behaviour of the regime for 5 years within Spring Creek and the adjacent floodplain was monitored. It was found that intrinsically unstable sub-soils and sparse ground cover due to persistent grazing by domestic livestock were the major factors leading to incision. Several physical and chemical properties were found to be the primary causes of the soil's instability. Rehabilitation focussed on stabilising the soils alongside the stream, promoting sedimentation and re-vegetation of the stream bed, with a longer-term objective of increasing the transfer of water, sediments and nutrients between the stream and its adjacent floodplain. The measures, implemented by local landowners, included the provision of in-stream porous rock weirs and the lowering of the grazing pressure on the stream bed and adjacent floodplain. Monitoring in 2007, 2009 and 2011 indicated that sedimentation was substantially faster above weirs than where there were no weirs. The rehabilitative measures resulted in the retention of fine sediment (<0.2mm) along the stream bed behind weirs.
dc.identifier.issn1036-9872
dc.identifier.urihttp://hdl.handle.net/1885/72375
dc.publisherAustralian Rangeland Society
dc.sourceThe Rangeland Journal
dc.subjectKeywords: controlled grazing; in-stream weirs; semiarid.
dc.titleRehabilitation of an incised ephemeral stream in central New South Wales, Australia: Identification of incision causes, rehabilitation techniques and channel response
dc.typeJournal article
local.bibliographicCitation.issue1
local.bibliographicCitation.lastpage83
local.bibliographicCitation.startpage71
local.contributor.affiliationStreeton, Nicholas, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationGreene, Richard, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationMarchiori, Kim, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationTongway, David, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationCarnegie, M.D., Lake Cowal Foundation
local.contributor.authoremailu9309345@anu.edu.au
local.contributor.authoruidStreeton, Nicholas, u4461962
local.contributor.authoruidGreene, Richard, u9309345
local.contributor.authoruidMarchiori, Kim, u4287811
local.contributor.authoruidTongway, David, a172410
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor040607 - Surface Processes
local.identifier.absseo961204 - Rehabilitation of Degraded Fresh, Ground and Surface Water Environments
local.identifier.ariespublicationf5625xPUB3215
local.identifier.citationvolume35
local.identifier.doi10.1071/RJ12046
local.identifier.scopusID2-s2.0-84875432049
local.identifier.thomsonID000316295400007
local.identifier.uidSubmittedByf5625
local.type.statusPublished Version

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