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dc.contributor.authorGrabowski, Robert
dc.contributor.authorArthur, Scott
dc.contributor.otherAllen, D.
dc.contributor.otherHaynes, H.
dc.contributor.otherMant, J.
dc.contributor.otherTerrell, R.
dc.contributor.otherMorse, J.
dc.contributor.otherYeakley, A.
dc.contributor.otherJanes, V.
dc.coverage.spatialJohnson Creek, Portland, Oregon USAen_UK
dc.coverage.temporalMay 2014-July 2014en_UK
dc.description.abstractNatural Flood Management (NFM) techniques aim to reduce downstream flooding by storing and slowing the flow of stormwater to river channels. These techniques include a range of measures, including setback stormwater outfalls and the physical restoration of channels and floodplains, to improve the natural functioning of catchments. An additional benefit of NFM measures is the potential reduction in sediment and pollutant delivery to the channel. Urban development releases a variety of heavy metal and nutrient pollutants that enter rivers through stormwater outfalls with adverse effects on the aquatic ecosystem. In this study, the influence of channel modification and quality of the river habitat on the sediment quality surrounding stormwater outfalls was assessed. Sediment samples were taken at several outfalls within the Johnson Creek catchment, Oregon, USA, and analysed for a variety of urban pollutants. The level of river habitat quality and modification at each site were assessed using a semi-quantitative scoring methodology. Significant increases in pollutant levels were observed at outfalls, with a greater and more variable increase at direct compared to setback outfalls. Removal efficiency of certain pollutants was found to be significantly correlated to the level of habitat quality or modification (for Fe, Ba, Sn, Mg, P, K) indicating that more natural reaches had greater potential for pollutant removal. The findings highlight the multiple benefits associated with NFM and river restoration approaches in relation to sediment quality and pollutant content.en_UK
dc.publisherThe University of Nottinghamen_UK
dc.subject.lcshFlood control channelsen_UK
dc.subject.lcshRiver sediments -- Qualityen_UK
dc.subject.lcshRiver sediments -- Samplingen_UK
dc.subject.lcshJohnson Creek (Clackamas County and Multnomah County, Or.)en_UK
dc.subject.lcshPollutants -- Controlen_UK
dc.titleThe impacts of natural flood management and urban catchment composition on stormwater quality and in-channel sediment qualityen_UK
dc.subject.freeStormwater pollution, heavy metal concentration, land use, green space, zoned catchment analysis, catchment composition, natural flood management, river restorationen_UK
dc.subject.jacsJACS Subjects::Engineering::Civil engineering::Environmental engineeringen_UK
dc.subject.lcLibrary of Congress Subject Areas::G Geography. Anthropology. Recreation::GE Environmental Sciencesen_UK 2014-July 2014en_UK
dc.coverage.coordinates45°26′51″N 122°17′18″W to 45°26′39″N 122°38′36″Wen_UK
uon.divisionFaculties, Schools and Departments::University of Nottingham, UK Campus::Faculty of Social Sciences::School of Geographyen_UK
uon.funder.controlledFunders::Engineering & Physical Sciences Research Councilen_UK
uon.datatypePhysical sample analytical results (excel files), GIS spatial dataset (shapefiles)en_UK
uon.parentprojectBlue-Green Cities Research Projecten_UK
uon.parentprojectClean Water for Allen_UK
uon.parentprojectPortland-Vancouver ULTRA (Urban Long-term Research Area) projecten_UK
uon.collectionmethodDetailed method is presented in the associated research paper. In summary, physical sediment sample collection from stormwater outfalls were processed for heavy metal and particle size distribution analysis.en_UK
uon.rightscontactHeriot-Watt Universityen_UK
uon.rightscontactCranfield Universityen_UK

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