特大城市都市区生态空间识别评价、网络构建与优化模型研究

Research on Ecological Space Identification,Evaluation,Network Construction and Optimization Model of Metropolitan Areas

在国家生态文明建设的要求下,生态空间作为承载城市生态信息和能量的重要用地,是促进特大城市空间结构合理形成的重要因素,也是城市高质量发展及高品质人居环境建设的关键。以6个特大(超大)城市都市区为研究对象,基于MSPA-InVEST复合模型对生态空间进行识别和评价,通过生境质量评价结果提取核心生态源地并生成生态阻力面,运用最小累计阻力模型(MCR)构建各特大城市都市区生态空间网络。在此基础上,结合对特大城市生态空间结构进化趋势的分析,提出各特大城市都市区生态空间结构的优化模式,并探索构建了“绿楔+绿环”的环网放射式和“绿心+绿带”的带网棋盘式2种特大城市都市区生态空间结构优化模型,以期为中国特大城市都市区生态空间格局优化和可持续发展提供理论支撑和实践指导,也为优化特大城市国土空间格局提供参考和借鉴。

In the construction of ecological civilization,as an important site carrying information and capacity in urban ecological space sphere,ecological space plays a fundamental role in promoting the formation of reasonable spatial structure of megacity,and is also the key to high-quality urban development and high-quality habitat planning and construction.Taking the six metropolitan areas as examples,this research couples MSPA and InVEST models to identify and evaluate ecological space,selects habitat source areas and constructs the resistance surface based on the results of the habitat quality evaluation,and uses the Minimum Cumulative Resistance(MCR)model to construct ecological space network of metropolitan areas.On this basis,combined with the analysis of the evolutionary trend of ecological spatial structure in megacities,it proposes optimized structural patterns of ecological space,and constructs two models of ecological space optimization in metropolitan areas,namely,radial pattern of networking with"wedge-ring"and grid pattern of networking with"core-belt",in order to provide theoretical support and practical guidance for optimization of ecological space pattern and sustainable development of metropolitan areas in China,as well as to provide certain references and bases for the optimization of territorial space pattern of megacities.