College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China.
School of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China.
Ying Yong Sheng Tai Xue Bao. 2021 Mar;32(3):993-1004. doi: 10.13287/j.1001-9332.202103.012.
We built a comprehensive evaluation index system of urbanization in Chengdu-Chongqing (Cheng-Yu) urban agglomeration from four subsystems, including the economic, social, ecological, and urban and rural coordination. The comprehensive evaluation index system of eco-environment was constructed by combining ecological environment carrying capacity and ecological flexibi-lity. The coupling coordination degree model was applied to quantify the coupling coordination degree between urbanization and eco-environment in the prefecture-level cities of Cheng-Yu urban agglo-meration from 2005 to 2018. With GIS spatial analysis, phenomenon analysis and Tapio model, we analyzed the interaction type, evolution path and path of decoupling between urbanization and eco-environment in the prefecture-level cities of Cheng-Yu urban agglomeration. The results showed that the urbanization quality of Cheng-Yu urban agglomeration showed a trend of fluctuation and rise during the study period. Both Chengdu and Chongqing as high value areas showed "double-core" radia-ting to the surrounding areas. The eco-environment quality showed a slowly rising trend. The spatial pattern was a " U " shape with a north opening, high perimeter and low center. The degree of coupling coordination between the urbanization system and the eco-environment system was rising, with a spatial pattern of low in the middle and high in the east and west. The overall level of coupling coordination was relatively high. The type of coupling coordination degree was gradually evolving from near-disorder and reluctant coordination to moderate coordination. The evolution paths of urbanization and eco-environmental interaction were divided into two categories: stable and changing. The stable type included 20 cities in 5 subcategories, with Chengdu, Deyang, Mianyang, being always well-coordination. The change type included 16 cities in 9 subcategories. The coordination degree of Chongqing main urban area, Tongliang and most other cities was improved, showing "rising" development. Hechuan, Zigong and a few other cities showed "sinking" development. The growth rates of both ecological environment and urbanization were positive. The decoupling state of urbanization and ecological environment was mainly characterized by weak decoupling and expansion connection.
我们从经济、社会、生态和城乡协调四个子系统构建了成都-重庆（成渝）城市群城市化综合评价指标体系。生态环境综合评价指标体系是通过结合生态环境承载力和生态灵活性构建的。应用耦合协调度模型，定量分析了 2005-2018 年成渝城市群地级城市城市化与生态环境的耦合协调度。利用 GIS 空间分析、现象分析和 Tapio 模型，分析了成渝城市群地级城市城市化与生态环境的相互作用类型、演化路径和脱钩路径。结果表明，成渝城市群城市化质量在研究期间呈波动上升趋势。成都和重庆作为高值区，呈现出“双核”向周边地区辐射的态势。生态环境质量呈缓慢上升趋势。空间格局呈北开口、周边高、中心低的“U”形。城市化系统与生态环境系统的耦合协调度呈上升趋势，空间格局呈中间低、东西高的态势。整体协调水平较高。耦合协调度类型逐渐由近无序、不情愿协调向中度协调演变。城市化与生态环境相互作用的演化路径分为稳定型和变化型两类。稳定型包括 5 个子类中的 20 个城市，成都、德阳、绵阳一直协调较好。变化型包括 9 个子类中的 16 个城市。重庆主城、铜梁和大部分其他城市的协调度有所提高，呈现出“上升”发展态势。合川、自贡和少数其他城市则呈现出“下沉”发展态势。生态环境和城市化的增长率均为正值。城市化和生态环境的脱钩状态主要表现为弱脱钩和扩展连接。
