?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fd-scholarship-dev.library.pitt.edu%2F8387%2F&rft.title=GREEN+ROOF+STUDY%3A+STORMWATER+QUANTITY%2C+QUALITY+AND+THERMAL+PERFORMANCE&rft.creator=Ni%2C+Jiayin&rft.description=This+thesis+presents+the+use+of+green+roofs+compared+to+conventional+(control)+roofs+using+modern+construction+methods.+The+green+roof+is+aesthetically+and+environmentally+superior+to+the+control+roof%2C+which+improves+the+city+landscape+and+reduces+the+burden+to+environment.+Two+green+roofs+involved+in+the+study+are+located+at+Shadyside+of+Pittsburgh+and+Homestead%2C+PA%2C+respectively.+Additionally%2C+a+control+roof+is+established+and+monitored+next+to+each+of+the+green+roofs.+The+green+roof+study+primarily+focused+on+stormwater+runoff+(quantity+and+quality)+and+thermal+performance.+The+results+demonstrated+that+green+roofs%2C+on+the+contrary+to+the+conventional+roofs%2C+retain+significantly+more+water%2C+attenuate+temperature+fluctuations+for+a+roof+membrane%2C+and+attenuate+environmental+contaminants+to+the+discharged+runoff.+Two+different+technologies+of+green+roofs+were+analyzed.+Soil+medium+thickness+and+soil+moisture+content+are+controlling+variables.Several+benefits+of+the+green+roof+in+comparison+to+the+control+roof+were+observed.+Data+acquired+during+the+95+storms+at+the+two+study+locations+revealed+that+green+roofs+delayed+the+time+for+runoff+from+the+roof+to+begin+as+well+as+when+the+peak+flow+occurred+and+greatly+reduced+the+hourly+flow+rate+and+total+runoff+volume+in+comparison+to+the+control+roofs.+The+delay+time+for+runoff+onset+from+a+green+roof+ranged+from+minutes+to+hours%2C+and+depends+on+the+soil+moisture+content+prior+to+the+storm.+Temperature+profiles+suggest+that+a+green+roof+provides+better+insulation+and+decreased+temperature+variations+for+all+parts+of+the+roof%2C+particularly+the+waterproofing+membrane%2C+during+warm+weather.+The+soil+medium+over+the+green+roof+is+able+to+neutralize+the+acidic+rainfall+and+retain+pollutant+solids%2C+preventing+the+unfiltered+rainfall+from+directly+discharging+to+the+sewage+system.&rft.date=2009-09-25&rft.type=University+of+Pittsburgh+ETD&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=http%3A%2F%2Fd-scholarship-dev.library.pitt.edu%2F8387%2F1%2FNI2009.pdf&rft.identifier=++Ni%2C+Jiayin++(2009)+GREEN+ROOF+STUDY%3A+STORMWATER+QUANTITY%2C+QUALITY+AND+THERMAL+PERFORMANCE.++Master's+Thesis%2C+University+of+Pittsburgh.++++(Unpublished)++