The Investigation And Study On Roof Greening Of Public Building In Changsha

Through the Investigation,statistics and analysis on plant species,function,form,size,construction time of 20 roof greening sample in Changsha,the object of this research is pu blic buildings' greening roof in Changsha,and completing the "roof greening plant lists in Changsha",eventually adopting the analytic hierarchy process(ahp)to synthetically evalua te 20 roof greening sample in changsha,and coming up with new insights of roof greening construction by combining with the questionnaire data statistics results,putting forward ro of greening construction optimization countermeasures respectively in Changsha from plan t configuration,maintenance and management,landscape construction.In order to promote reference to the further development of public buildings' roof greening in Changsha,so as to use of the resources of the neglected better.The results of this research show that:1.The main application of garden plants of the roof of changsha city belongs to 51 families of 88 species,among them,the angiosperms,which included 46 families and 75 genera,were included in the angiosperms,which included the dicotylediophytes,which included 39 families and 57 genera,and 18 species of monocotyletes.Gymnosperms 3 genus 3 genera;Fern 2 species 2 genera.2.Changsha plant of roof greening application types mainly include:arbor,shrub and herb,and vines,the configuration of plant,the application of herbs and shrubs frequency is higher.Survey found that the Osmanthus sp.,Myrica rubra(Lour.)S.et Zucc.,Cycas revoluta Thunb.and highest frequency of application of bushes Loropetalum chinense var.rubrum,Osmanthus fragrans var.,Buxus megistophylla,Ligustrum vicaryi,Rosa chinensis Jacq.,Photinia fraseri,Rhododendron simsii Planch.Camellia japonica L.frequency,herbal application for the highest frequency of the Sedum lineare Thunb.3.The mainly types of greening roof is garden type,lawn type and combined type.Th e function type of greening roof is viewandadmire,recreation,production and science educ ation.Building carrier including top floor,stilt floor and the skirt building,area size is betw een 400 to 18000 m2,construction time is between 2002-2016,and most widely using is shrubs.4.Obvious correlation between various factors has been found through comparing with var ious factors of roof greening.The type of roof and function determines the choice of plants,construction time rather than among area,function of roof garden also has a certain relationship.5.The results shows that it's acceptable and supporting for attitude to roof greening of most people's.People have basic knowledge of roof greening,and have higher demands fo r roof greening space.But at present,the development of roof greening degree is low in cha ngsha,less for the contact of the roof.6.Using analytic hierarchy process(ahp)to comprehensively evaluate the ecological,landscape and safety of 20 roof greening sample.The result shows that:The overall level o f general roof garden inChangsha is general,changsha has more room to improve and has a large room to improve.