Show simple item record

dc.contributor.authorVander Linden, William Kyle
dc.date.accessioned2008-12-10 20:32:06 (GMT)
dc.date.available2008-12-10 20:32:06 (GMT)
dc.date.issued2008-12-10T20:32:06Z
dc.date.submitted2008-09-19
dc.identifier.urihttp://hdl.handle.net/10012/4135
dc.description.abstractVegetated roof technologies are increasingly being adopted as treatment measures to mitigate the effects of urban stormwater. A mass balance approach was used to assess the wet weather performance of a vegetated roof on the top of city hall in Waterloo, Ontario. Vegetated and control roof sections were instrumented to measure precipitation inputs, storage and outflow for 18 storm events from June to October, 2006. Concentrations of suspended solids (SS), total phosphorus (TP), soluble reactive phosphorus (SRP), copper (Cu), zinc (Zn), chromium (Cr) and cadmium (Cd) in precipitation and roof (vegetated and control) runoff were measured. A total of 155.6 mm of rain fell during the study period. The vegetated roof retained 64.5 mm (41.5%) of the total rainfall while the control roof retained ~ 5.1 mm (3.3 %). For individual rain events, the vegetated roof retained an average of 3.5 mm (47.6 %) while the control roof retained ~ 0.3 mm (4.7 %). Water retention varied with storm size, season and was influenced by wetting history. The vegetated roof retained 80.6 % of precipitation for light storm events (≤ 3.5 mm) and 34.9 % for large storm events (> 3.5 mm). The control roof retained 7.6 % light storm events and 3.7 % for large storm events. Water quality from the vegetated roof did not show significant improvement as only Zn concentrations in runoff from the vegetated roof were significantly lower than that measured in runoff from the control roof. Concentrations of SS, Cu, Cr and Cd in vegetated roof runoff were relative to concentrations in rainfall and control roof runoff and TP and SRP concentrations were significantly higher than that in rainfall or control roof runoff. Results gained from this study may assist people in planning and stormwater management by providing insight into the monitoring, development and application of new stormwater controls.en
dc.language.isoenen
dc.publisherUniversity of Waterlooen
dc.subjectVegetated Roofen
dc.subjectGreen Roofen
dc.subjectLow Impact Developmenten
dc.subjectWet weather performanceen
dc.subjectwater qualityen
dc.subjectsuspended solidsen
dc.subjectphosphorusen
dc.subjectmetalsen
dc.subjectstormwater runoffen
dc.titleWet Weather Performance of an Extensive Vegetated Roof in Waterloo, Ontarioen
dc.typeMaster Thesisen
dc.pendingfalseen
dc.subject.programPlanningen
uws-etd.degree.departmentSchool of Planningen
uws-etd.degreeMaster of Environmental Studiesen
uws.typeOfResourceTexten
uws.peerReviewStatusUnrevieweden
uws.scholarLevelGraduateen


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record


UWSpace

University of Waterloo Library
200 University Avenue West
Waterloo, Ontario, Canada N2L 3G1
519 888 4883

All items in UWSpace are protected by copyright, with all rights reserved.

DSpace software

Service outages