Spatial network structure dynamic evolution and correlation characteristics analysis of urban agglomeration under ecological security constraint： a case of urban agglomeration around the Poyang Lake
LIU Yaobin1,2， QIU Hao2， DAI Lu2
1.Research Center of Central China Economic and Social Development， Nanchang University， Nanchang 330031， China；2.School of Economics and Management，Nanchang University，Nanchang 330031， China
Abstract：Based on the theory of landscape ecological security and gravity model，this paper discusses the spatial network structure dynamic evolution and correlation characteristics analysis of urban agglomeration under ecological security constraint， which not only provide a new perspective for the optimization of the spatial network structure of urban agglomerations， but also promotes the sustainable development of urban agglomeration.Taking the Poyang Lake urban agglomeration as the research area， combining the landscape structure security and ecosystem service value to construct the ecological security index， and introducing it into the gravity model， quantitatively measure and analyze the spatial network structure dynamic evolution and correlation characteristics in the study area.The results show as follows.1) The overall ecological security of the Poyang Lake urban agglomeration has decreased in 2005-2015， and some regions have experienced a transition from high ecological security to low ecological security， and the ecological risk increased.2) Without considering the ecological security constraints， Nanchang City has always been at the core of the whole research period，whose “core-edge” structure is significant， and the urban spatial network structure changes in a loose trend.Under the constraints of ecological security，the multi-center network structure features of the study area are gradually becoming more prominent，and the spatial network structure of urban agglomeration is gradually mature and optimized in the direction of coordination.3) Without considering the constraints of ecological security，most cities have low correlation strength andare in a stable homogeneous state，forming a single core feature of Nanchang City as the first associated city.Under the constraints of ecological security， the spatial network association of urban agglomerations presents an all-speed non-equilibrium feature， and forms a multi-center development model with Nanchang City， Jiujiang City， Fuzhou City and Jingdezhen City as the first associated cities.It's found that the gravity model combined with ecological security index is able to effectively measure the spatial network structure dynamic evolution and correlation characteristics of urban agglomeration under the constraint of ecological security，and would provide a reference for the sustainable development of the Poyang Lake urban agglomeration.
刘耀彬,邱 浩,戴 璐. 生态安全约束下城市群空间网络结构动态演变及关联特征分析——以环鄱阳湖城市群为例[J]. 华中师范大学学报(自然科学版), 2020, 54(4): 522-535.
LIU Yaobin,QIU Hao,DAI Lu. Spatial network structure dynamic evolution and correlation characteristics analysis of urban agglomeration under ecological security constraint： a case of urban agglomeration around the Poyang Lake. journal1, 2020, 54(4): 522-535.
2020, Vol. 54 
