基于两维图论聚类的中原城市群“三生”功能评估

Production-living-ecological Functional Evaluation of Central Henan Urban Agglomeration Based on Two-dimensional Graph Theory Clustering

基于“三生”功能的现状并对其多功能性合理分区,对于促进城市群国土空间高质量发展具有重要意义。以中原城市群为例,通过建立“三生”功能评价体系,探讨“三生”功能演化过程,运用两维图论聚类对国土空间进行分区优化。结果表明:生产、生活功能高值位于郑州-洛阳和郑州-许昌等城市连片区并不断持续扩张,生态功能高值多集中在豫西山区;“三生”功能具有明显集聚特征,1980—2020年,中东部生产功能持续降低且呈破碎化趋势,生活功能不断聚集在各地市建成区周边并持续胁迫生态功能区域;根据两维图论聚类方法划分为5个功能区,并针对不同分区特征提出相应管控策略。

Based on the present situation of production-living-ecological function and rationally dividing it,its versatility is of great significance for promoting the high-quality development of urban agglomeration land space.Taking the Central Henan urban agglomeration for example,we discussed the evolution process of urban agglomeration production-living-ecological function by establishing the production-living-ecological function evaluation system and optimizing the territorial space based on two-dimensional graph theory clustering.The results show that①the high value of production and living functions is located in the contiguous areas of Zhengzhou-Luoyang,Zhengzhou-Xuchang and other cities and continues to expand,while the high value of ecological function is mainly concentrated in the mountains of western Henan.②The production-living-ecological function has obvious gathering characteristics.From 1980 to 2020,the production function in the mid-east area continued to decline and showed a trend of fragmentation,and the living function continued to gather around the urban built-up areas and continued to stress the ecological function areas.③According to the two-dimensional graph theory clustering method,it is divided into five functional zones.According to the characteristics of different zones,Corresponding management and control strategies are proposed.