| With the development of economic and the increase of urban architecture, urban ecological environment have tended to become worse. Green ecological concept has flooded every corner of people's living, such as green plants, green foods, green building material, green architecture, etc. The green symbolizes healthy and vigorous. People would like to live and work in healthy and enjoyable environment.Roof greening, espacially to existing building is an exigency problem to be researched. From the position of society development,it has operation significance. This dissertation bases on the research of roof greening, references to the climate of Hangzhou, the current situation and the data from the questionnaire survey in Hangzhou citizen. It analyses advanced achievements of roof greening at home and abroad, explores the ways of reconstruct flat roof to green roof. to find out the fitting way to reconstruct the roof in Hangzhou.It is a practical problem that the dissertation involving about roof greening. The final purpose of this dissertation is to put forward some useful suggestions to the government, and becoming a cause for concern. |