The Study Of Urban Green Space Ecological Network Based On Connectivity

In recent years, the city, expanding in space, has put the network of urban green space ecosystem into fragmentation. There is lack of ecological links between the residual green nodes, so to the green corridor, which makes it difficult to play important ecological performance and makes the stability of the whole. system weaken.Through the urban green space ecological network and connectivity of theory, the article explains their development, content, type, composition, structure, function, and is on this basis to form a series of the evaluation index system, which research for the green nodes, green corridors and green eco-network connectivity.Based on gravity model, and graph theory, the article chooses Feng Tai District of Beijing as an example, and analyzes the interaction between nodes on the green strength of statistical under the support of the GIS technology. Combined with graph theory and network analysis a potential green corridors road is formed, and nine kinds of green eco-network model are built, so the article can make quantitative analysis and evaluation. Application of y index, a index,βindex, the cost ratio, green node connectivity index and other indicators can help us to select the best model, and overlay comparative analysis of the original plan, including the recognition of an important green element, the reasonable suggestion of evaluation to the existing structure of green space system planning, which optimizes a measure to be able to ensure the planning and implementation of feasibility, scientific and effective. The results can provide more scientific basis of planning and reference information for city builders and planners.