Study On Evaluation Of Urban Living Road Green Space In Cold Area Under The Background Of Sponge City

Urban road green space is an important part of urban green space,and urban life road is the main place of urban residents ’ activities,is the main carrier of urban road green space construction,is to reflect a city image and historical and cultural characteristics of space.In this paper,literature research,principal component analysis,weighted average method,questionnaire survey and analytic hierarchy process are used to study the evaluation system of urban living road green space in cold regions under the background of sponge city.The results are mainly as follows :(1)Through the analysis of the development status of sponge city,urban road green space and road evaluation at home and abroad,it is clear that urban road green space is an important part of urban green space construction.At present,the research on road green space evaluation from the perspective of sponge city in China is still in its infancy,and sponge city technology is widely used in urban road green space,which will become the future development trend.(2)According to the evaluation system framework of analytic hierarchy process,through the primary selection of indicators,after the screening of factor analysis indicators,the indicators are classified and named.The criterion layer is the recycling of rain and snow resources,improving the ecological environment and enriching the urban landscape;The index layer consists of 19 index factors such as annual runoff control rate,runoff pollution control rate,air purification ability,microclimate regulation ability,nativeness of plants and richness of plant level.(3)After the evaluation index is determined,the evaluation model of urban living road green space in cold regions under the background of sponge city is constructed by calculation.The ranking results of the weight value of the criterion layer are as follows : improving the ecological environment > enriching the urban ecological landscape > recycling the rain and snow resources.It indicates that people attach great importance to the ecological nature of urban living road green space,and improving the urban ecological environment is regarded as the most critical factor for evaluation.Enriching urban landscape is also one of the important functions of urban road green space.Rain and snow resources recycling is a new function derived from urban roads under the background of sponge city.Due to the small green space,the function of water resources recycling is relatively not obvious.The water resources in the north are relatively rich,and people do not pay enough attention to the recycling of rainwater.(4)Taking the 28 th Bing Road in the southern new town of Changchun as the research object,the constructed evaluation system is used to evaluate it,and the comprehensive evaluation value is 74.05.The evaluation grade is ’ medium ’.There are still many problems in the green space construction of Road C28.In view of the existing problems,feasible optimization suggestions are put forward in four aspects : plant selection and collocation,rainwater storage facilities placement,pavement sketch and post-maintenance.This paper constructs the evaluation system of urban living road green space in cold regions under the background of sponge city,which provides guidance and reference for the application of sponge city in road construction,and has important practical significance.It provides the construction direction for the construction of ecological,beautiful and flexible living road green space.