The Ecological Spatial Structure Model Of The Metropolitan Area And Its Optimization Strategy

Since the 21 st century,China’s urbanization process has accelerated and the urban construction has been unprecedentedly prosperous.With the rapid expansion of urban land,the ecological space has been eroded,the ecological environment has been deteriorated,and the contradiction between ecological land and construction land attracts huge attention.To improve the urban ecological environment and seek the balance between urban development and ecological protection,the rational layout of ecological space has gradually become a widely-concerned research area.A reasonable ecological space structure refers to a more scientific ecological element organization mode,in which the urban ecological space would exert its ecological function more effectively.Taking this as a starting point,the paper combines the morphological spatial pattern analysis method to carry out a preliminary study on the ecological spatial structure model of the metropolitan area.This article starts with the idea of "research basis,status recognition,evaluation analysis,model construction,and optimization strategy".Starting from the characteristics of China’s urban development,two types of research are defined: the global metropolitan area and the core metropolitan area.Seven megacities with typical significance in China are selected.Then,a technical path based on the morphological spatial pattern analysis method is established to identify the ecological space of the selected cities,and summarize the ecological spatial pattern from four aspects,including total ecological space,form,type and pattern.And then,based on the analysis of current ecological space and the cases of other cities,four key elements and the basic characteristics of the ecological space structure are extracted and analyzed.With the examples of domestic and foreign cities,two typical megacities ecological spatial structure models are summarized.Regarding the construction of an ideal city ecological space structure optimization model,the paper proposes ecological space optimization principles and construction strategies based on the previous research on ecological space elements and two structural models,which guide to construct two universal ecology spatial structure optimization model,combining the analysis of typical examples.Finally,aiming at the main problems of the current ecological space,following the idea of optimizing from elements to the overall,the optimization countermeasures of the ecological space structure of megacities are proposed from four levels of element optimization and overall structure optimization,in order to provide a reference of optimal structure in practice.Based on the MSPA,this paper measures and identifies the ecological spatial pattern from the perspective of quantitative assessment and qualitative identification,and applies the analysis results to the construction of the ecological spatial structure optimization model,and proposes a new ecological spatial structure.The construction method is of great significance to promote the optimization of the ecological spatial structure of the metropolitan area.