京津冀城市群城市化强度与生态韧性的耦合协调分析

探索市域尺度与格网尺度下城市化强度与生态韧性之间的作用机制,对提高生态韧性水平、提升城市发展质量、促进城市群可持续发展具有重要意义。以京津冀城市群为研究区,基于2000—2020年土地利用数据、人口密度数据和社会经济数据,尝试构建一套完整的城市化强度与生态韧性指标体系。利用景观安全度模型修正了“规模-密度-形态”生态韧性方法,以市域尺度与格网尺度对比分析为手段,结合耦合协调度模型与Tapio解耦模型,探究二者的时空分异格局及协同演化特征。结果表明：(1)不同尺度下,城市化强度和生态韧性在全局上变化趋势相反且错位关系明显,北京、天津城市化强度高而生态韧性较低;格网尺度下,城市化强度与生态韧性的分布形状存在差异：城市化强度多呈现中心-外围空间分布,生态韧性呈多样化、零散化特征。(2)不同尺度下,城市化强度与生态韧性的耦合协调度逐年增强,北京、天津最高,廊坊、石家庄、衡水、沧州次之,邯郸、邢台相对较低;格网尺度下,局部区域出现特殊现象：北京、天津中部出现初级协调、轻度失调;邯郸、邢台小部分区域达到良好协调。(3)城市化强度与生态韧性的脱钩关系处于良性发展状态,弱脱钩、扩张负脱钩呈上升变化,而...

Coupling coordination analysis of urbanization intensity and ecological resilience in Beijing-Tianjin-Hebei

Exploring the mechanism between urbanization intensity and ecological resilience at city scale and grid scale is of great significance to improve the level of ecological resilience, improve the quality of urban development, and promote the sustainable development of urban agglomeration. This paper takes the Beijing-Tianjin-Hebei as the study area, and tries to build a complete index system of urbanization intensity and ecological resilience based on land use data, population density data and socioeconomic data from 2000 to 2020. The landscape security model is used to modify the "scale-density-form" ecological resilience method, and the spatial and temporal differentiation patterns and co-evolution characteristics between the urban scale and grid scale are explored by combining the coupling coordination degree model and Tapio decoupling model. The results show that:(1) at different scales, the overall trend of urbanization intensity and ecological resilience was opposite and the dislocation relationship was obvious. Beijing and Tianjin had high urbanization intensity but low ecological resilience. At the grid scale, the distribution shapes of urbanization intensity and ecological resilience were different:urbanization intensity mostly presented a center-periphery spatial distribution, and the ecological resilience was characterized by diversification and fragmentation. (2) At different scales, the coupling coordination degree of urbanization intensity and ecological resilience increased year by year, with the highest in Beijing and Tianjin, followed by Langfang, Shijiazhuang, Hengshui and Cangzhou, and relatively low in Handan and Xingtai. At the grid scale, special phenomena appeared in local areas:primary coordination and mild imbalance occurred in the central Beijing and Tianjin; Handan, Xingtai small area to achieve good coordination. (3) The decoupling relationship between urbanization intensity and ecological resilience was in a state of benign development. Weak decoupling and expansion negative decoupling showed an upward trend, while strong decoupling showed a downward trend, indicating that urbanization had reached a certain level, which promoted the positive development of ecological resilience, and urbanization intensity and ecological resilience reached a coordinated state of sustainable development. The results of this study provide a scientific basis for the coupling 1analysis of urbanization intensity and ecological resilience.