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dc.contributor.authorEstrin, Avi
dc.contributor.authorPhillips, David
dc.date.accessioned2016-01-14T21:58:52Z
dc.date.available2016-01-14T21:58:52Z
dc.date.issued2014
dc.identifier.urihttps://hdl.handle.net/10652/3173
dc.description.abstractCoinciding with the Unitec environmental sustainability strategy daylighting of the Wairaka stream is at the heart of creating positive environmental change on campus. Currently part of the stream flows through a 70m culvert hiding away its historic character and lessening its natural benefits. The paper analyses potential daylighting designs, and details a final design. A Stream Ecological Valuation performed on the downstream reach produced a baseline score of 0.58, indicating moderate water quality. The assessment highlighted the importance of maintaining similar geomorphology, and creating diverse aquatic and riparian habitats. Applying these findings three concepts were modelled including the existing culvert for the 2, 5, and 100 year Average Rainfall Intensity events using the hydrological modelling program HEC-RAS. A weighted attribute selection method incorporating Ecological, Social, Economic, and Cultural factors identified Concept 3 as the best design, scoring 6.96/10. Based on the 5 year storm it increased the channel capacity from 4.07m3/s to 7.13m3/s effectively reducing overland flow by 99.7% whilst reducing channel velocity from 1.91m/s to 1.52m/s. It can be concluded that daylighting will prevent flooding for the 5 year storm, improve the ecology, provide tranquility for staff and students, and restore part of Unitec and Mt Albert’s cultural heritage.en_NZ
dc.language.isoenen_NZ
dc.publisherWater New Zealanden_NZ
dc.relation.urihttps://www.waternz.org.nz/en_NZ
dc.subjectstormwater managementen_NZ
dc.subjectdaylightingen_NZ
dc.subjecturban streamsen_NZ
dc.subjectrestorationen_NZ
dc.subjectsocialen_NZ
dc.subjectcultural heritageen_NZ
dc.subjectstudent educationen_NZ
dc.titleWairaka Stream Daylighting Projecten_NZ
dc.typeConference Contribution - Paper in Published Proceedingsen_NZ
dc.rights.holderAuthorsen_NZ
dc.subject.marsden090508 Water Quality Engineeringen_NZ
dc.identifier.bibliographicCitationEstrin, A., and Phillips, D.J. (2014). Wairaka Stream Daylighting Project. Stormwater 2014. (Ed.), Water New Zealand. 1/ (20 pages)en_NZ
unitec.institutionHarrison Grierson Consultants Ltden_NZ
unitec.institutionUnitec Institute of Technologyen_NZ
unitec.publication.volume1en_NZ
unitec.publication.titleStormwater 2014en_NZ
unitec.conference.titleStormwater 2014en_NZ
unitec.conference.orgWater New Zealand.en_NZ
unitec.conference.locationChristchurchen_NZ
unitec.conference.sdate2014-05-14
unitec.conference.edate2014-05-16
unitec.peerreviewedyesen_NZ
unitec.identifier.roms56912en_NZ


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