| With the speed of city to speed up the city, various problems have emerged. Particularlyenvironmental problems in the city were Tense city land,Greening loss,Urbanheatislandeffectet al.In order to solve the outstanding urban environmental problems,flying around widechoice of polymer organic eco-friendly materials,these polymeric organic eco-friendlymaterials not only fails to address the root causes of problems,instead of creating newpollution.For these reasons,the paper,which focused on the XI ’ an city,studied the flat rooftemperatures greening by Parthenocissus quinquefolia,exposed (not green) flat rooftemperatures and air temperatures by the outdoor experimental observation, datacollection,laboratory analysis methods,and summaried up the changing temperatures from thethree cases of24hours,and the relationship between themPreliminary results show:(A) Found from the monitoring data:the flat roof daily averagetemperature greening by Parthenocissus quinquefolia is lower3.1℃than the average airtemperature, and is10.6℃lowerthan exposed roof temperature; Found from the comfort ofthe design parameters of the indoor temperature:It,that the house’s flat roof greened byParthenocissus quinquefolia,is8hours to provide comfort sleep time,but the expose roofindoor could provide only4hours of comfort sleeping time and13hours of high temperature.(B)According to the monitoring experiment: the reasons,that lower temperature of the flatroof greening by Parthenocissus quinquefolia,were the transpiration and shading effect in theprocess of growth.Greening roof, not only solve the problem of fewer city greening, but also can increasethe city green lung, can ease some environmental problems such as Urbanheatislandeffect.It isthe relatively more environmentally friendly solutions. |
