Study On Ecological Benefit Of Roof Greening In Nanjing

The rapid development of human society to test the carrying capacity of the city,the huge urban population brought about by the pressure,so that the use of green resources will also be reduced.The original ecological environment of the city is destroyed,the ecological and environmental problems become more and more prominent,the urban heat island effect is strengthened,air pollution,urban waterlogging and a series of urban problems have occurred.The city needs more green space to alleviate the city's continuous expansion of the harm caused by the ecosystem.Roof greening is one of the important green forms of the city,which plays an important role in improving the urban ecological environment,enriching the ecological landscape,improving the climate environment and ecological service function.Roof greening with the ecological benefits and economic benefits are constantly affecting people's lives.Roof greening can not be replaced by ground greening,is to solve the current urban environmental problems can choose one of the most creative,the most cost-effective way.And for this special green form,how to build green space and achieve the ecological effect of roof greening,to help improve the ecological requirements of the city is an urgent problem to be solved.Nanjing as a large city development roof greening,can effectively save land resources,beautify the urban ecological landscape,in line with the construction of landscape city forest requirements,has important ecological,economic and social benefits.With the development of eco-livable cities,sponge cities and low-carbon cities in China,the research on the different plant allocation patterns on the roof greening,the research on the ecological benefits such as cooling,huming and purification of plants has also been developed.Roof greening to improve the city heat island effect,building energy efficiency and urban environment research is also actively and extensively studied at home and abroad.At present,there are few studies on the ecological benefits of roof greening in Nanjing,and mostly qualitative research.Based on the climatic conditions of Nanjing,it is of great significance to explore the influence of roof greening on urban thermal environment and improve the layout of landscape architecture and improve the comfort of thermal environment.Based on the investigation of rooftop greening in Nanjing,the survey and analysis of plant roof greening were carried out in Nanjing.The simulation and analysis of ecological benefits were carried out on the basis of samples,and the optimal layout and scheme for their plant configuration were obtained.The Based on the ENVI-met simulation technique,the relationship between roof greening and urban thermal environment comfort was discussed based on the change of temperature,relative humidity and wind speed of roof greening.Based on the favorable microclimate effect of roof greening plants,Select and configure the layout to propose an optimization method.At the same time,the roof greening has an important role in reducing the urban heat island effect and building energy saving,protecting the biodiversity,and maintaining the ecological benefits such as waterlogging.Season,rainfall,rainfall intensity,the roof of the greening of the plant,the roof of the cultivation of substrate thickness and so on are related to the ecological benefits of play.Only to explore the roof of the greening of the relationship between the various factors and the comprehensive role of the situation,in order to better explore the environmental benefits of roof greening potential to build sponge city.Based on these research directions,this paper makes a series of studies on the composition and ecological benefits of roof greening plants in Nanjing,combined with investigation and software simulation.