The impacts of natural flood management and urban catchment composition on stormwater quality and in-channel sediment quality
Contains the raw sample data for all sample locations within the study. Heavy metal, particle size distribution and contributing catchment information is provided in this dataset from which, following the methodology presented in the paper, the results can be replicated. (67.12Kb)
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Natural 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.
Related publication DOI
- Flood control channels
- River sediments -- Quality
- River sediments -- Sampling
- Johnson Creek (Clackamas County and Multnomah County, Or.)
- Pollutants -- Control
- Stormwater pollution, heavy metal concentration, land use, green space, zoned catchment analysis, catchment composition, natural flood management, river restoration
- JACS Subjects::Engineering::Civil engineering::Environmental engineering
- Library of Congress Subject Areas::G Geography. Anthropology. Recreation::GE Environmental Sciences
- Faculties, Schools and Departments::University of Nottingham, UK Campus::Faculty of Social Sciences::School of Geography
Data typePhysical sample analytical results (excel files), GIS spatial dataset (shapefiles)
- Allen, D.
- Haynes, H.
- Mant, J.
- Terrell, R.
- Morse, J.
- Yeakley, A.
- Janes, V.
- Funders::Engineering & Physical Sciences Research Council
- Blue-Green Cities Research Project
- Clean Water for All
- Portland-Vancouver ULTRA (Urban Long-term Research Area) project
- May 2014-July 2014
- Johnson Creek, Portland, Oregon USA
- May 2014-July 2014
- 45°26′51″N 122°17′18″W to 45°26′39″N 122°38′36″W
Data collection methodDetailed 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.
- Heriot-Watt University
- Cranfield University