Carpark pollutant yields from first flush stormwater runoff

Simple item page
dc.contributor.authorPoudyal S
dc.contributor.authorBello-Mendoza R
dc.contributor.authorCochrane, Thomas
dc.date.accessioned2022-04-06T02:45:20Z
dc.date.available2022-04-06T02:45:20Z
dc.date.issued2021en
dc.date.updated2022-03-13T21:18:15Z
dc.description.abstractStormwater runoff from carparks should be treated to remove pollutants before they enter urban waterways; however, differences in traffic characteristics and surrounding land use activities can result in varying first flush pollutant types and concentrations requiring specific treatment approaches. An understanding of potential variations in first flush pollutant characteristics from carparks is necessary to design adequate treatment systems. Stormwater runoff from over 20 runoff events in three different carparks (university, hospital and industrial) in Christchurch, New Zealand were thus analyzed for Total Suspended Solids (TSS) and heavy metals (Zn, Cu and Pb) over a year. Pollutant concentrations were found to vary across the carparks, which were largely driven by land use activities such as traffic count, size of the vehicles, and surrounding topography. Mean concentrations of heavy metals (both dissolved and particulate) and TSS were significantly higher in the industrial carpark than in the other two urban carparks, which had statistically similar mean pollutant concentrations. Specific ratios of metal species (Zn:Cu, and Zn:Pb) were relatively high for the industrial carpark, indicating a greater contribution from the wear and tear of large commercial vehicles. TSS and total Zn wash-off concentrations from the hospital carpark when it was non-operational (passive) were found to be significantly lower than the hospital carpark when it was operational (active), confirming that pollutant concentrations increase with vehicular activity. Rainfall characteristics such as antecedent dry days and rain intensity and duration were found to only have a low positive correlation to pollutant concentrations for all carparks. The findings from this study highlight the importance of considering carpark characteristics in the implementation of on-site stormwater treatment systems.en
dc.identifier.citationPoudyal S, Cochrane TA, Bello-Mendoza R (2021). Carpark pollutant yields from first flush stormwater runoff. Environmental Challenges. 5. 100301-100301.en
dc.identifier.doihttp://doi.org/10.1016/j.envc.2021.100301
dc.identifier.issn2667-0100
dc.identifier.urihttps://hdl.handle.net/10092/103518
dc.languageen
dc.language.isoenen
dc.publisherElsevier BVen
dc.rights© 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ )en
dc.rights.urihttp://hdl.handle.net/10092/17651en
dc.subjectHeavy metalsen
dc.subjectImpervious surfacesen
dc.subjectMetal partitioningen
dc.subjectTotal suspended solidsen
dc.subjectUrban carparksen
dc.subjectRainfall characteristicsen
dc.subject.anzsrcFields of Research::40 - Engineering::4005 - Civil engineering::400513 - Water resources engineeringen
dc.subject.anzsrcFields of Research::40 - Engineering::4005 - Civil engineering::400508 - Infrastructure engineering and asset managementen
dc.subject.anzsrcFields of Research::40 - Engineering::4011 - Environmental engineering::401102 - Environmentally sustainable engineeringen
dc.subject.anzsrcFields of Research::41 - Environmental sciences::4105 - Pollution and contamination::410504 - Surface water quality processes and contaminated sediment assessmenten
dc.titleCarpark pollutant yields from first flush stormwater runoffen
dc.typeJournal Articleen
uc.collegeFaculty of Engineering
uc.departmentCivil and Natural Resources Engineering
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Environmental_Challenges_2021_100301.pdf
Size:
1017.41 KB
Format:
Adobe Portable Document Format
Description:
Published version
Download
Collections
Engineering: Journal Articles