Research On Comprehensive Evaluation Of Green Space Ecological Security Pattern In Nanjing.

The rapid urbanization process in China has brought many ecological problems and hindered the development of cities towards high and sustainable goals.Green space provides the possibility to solve the ecological environment problem in the process of urbanization,and the research on ecological security pattern has made the role of green space in the city increasingly important.From the viewpoint of ecological security pattern,this paper studies the greenspace of nanjing city.The study selected Nanjing,a city with high urbanization level,as study area,land use status in nanjing city as the main data sources,based on the gis technology and landscape ecology theory,refer to the pattern of ecological security evaluation at home and abroad and build related articles,on the basis of the literature information collection,the application of the theory of landscape ecology and choose the pattern of ecological security evaluation index,the application of principal component analysis(pca)construct the index system.Evaluating the green space based on the ecological security pattern,classifying the ecological security pattern of nanjing city,and the green space optimization strategy was put forward based on the classification results.It provides reference for the study area and ecological evaluation of similar urbanization development area.The research mainly includes several items:(1)Identification of ecological security pattern elements in the research area.(2)Apply landscape ecology theory,summarize the indicators of ecological security pattern and build evaluation system.(3)Evaluation of ecological security pattern in the research area.(4)Classification ecological security pattern type in the research area.the model of the ecological security pattern optimization strategy are put forward,to provide the reference for similar ecological evaluation urbanization areas.Results showed that the ecological security pattern is good,but there are still differences between the regions,the result was consistent with actual situation,this paper builds the evaluation index system of green land ecological security pattern effect is good.