Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.watres.2011.12.050
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dc.titleA field study to evaluate runoff quality from green roofs
dc.contributor.authorVijayaraghavan, K.
dc.contributor.authorJoshi, U.M.
dc.contributor.authorBalasubramanian, R.
dc.date.accessioned2014-10-09T07:35:42Z
dc.date.available2014-10-09T07:35:42Z
dc.date.issued2012-03-15
dc.identifier.citationVijayaraghavan, K., Joshi, U.M., Balasubramanian, R. (2012-03-15). A field study to evaluate runoff quality from green roofs. Water Research 46 (4) : 1337-1345. ScholarBank@NUS Repository. https://doi.org/10.1016/j.watres.2011.12.050
dc.identifier.issn00431354
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/90893
dc.description.abstractGreen (vegetated) roofs are emerging as practical strategies to improve the environmental quality of cities. However, the impact of green roofs on the stormwater quality remains a topic of concern to city planners and environmental policy makers. This study investigated whether green roofs act as a source or a sink of various metals (Na, K, Ca, Mg, Al, Fe, Cu, Cd, Pb, Zn, Mn, Cr, Ni, Li and Co), inorganic anions (NO3-, NO2-, PO43-, SO42-, Cl -, F - and Br -) and cation (NH4). A series of green roof assemblies were constructed. Four different real rain events and several artificial rain events were considered for the study. Results showed that concentrations of most of the chemical components in runoff were highest during the beginning of rain events and subsided in the subsequent rain events. Some of the important components present in the runoff include Na, K, Ca, Mg, Li, Fe, Al, Cu, NO3-, PO43- and SO42-. However, the concentration of these chemical components in the roof runoff strongly depends on the nature of substrates used in the green roof and the volume of rain. Based on the USEPA standards for freshwater quality, we conclude that the green roof used in this study is reasonably effective except that the runoff contains significant amounts of NO3- and PO43-. © 2011 Elsevier Ltd.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.watres.2011.12.050
dc.sourceScopus
dc.subjectMetals
dc.subjectNutrients
dc.subjectRunoff quality
dc.subjectSedum
dc.subjectVegetated roofs
dc.typeArticle
dc.contributor.departmentCIVIL & ENVIRONMENTAL ENGINEERING
dc.contributor.departmentSINGAPORE-DELFT WATER ALLIANCE
dc.description.doi10.1016/j.watres.2011.12.050
dc.description.sourcetitleWater Research
dc.description.volume46
dc.description.issue4
dc.description.page1337-1345
dc.description.codenWATRA
dc.identifier.isiut000300540000041
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