关键词: 城镇化, 生态环境, 耦合协调, 长江中游

Abstract: The middle reach area of the Yangtze River is the transmission area for development of eastern, central and western China. It is also a key area in promoting new urbanization. Research on its coupling coordinated development of urbanization and ecological environment can provide references for the high-quality development of new urbanization in the middle reach of the Yangtze River. This paper establishes an evaluation index system of urbanization and ecological environment, and uses coupling coordinated model to study its temporal-spatial pattern of coupling coordination between urbanization and ecology in the middle reach of the Yangtze River in 2005, 2010, 2015 and 2017 at the scales of the entire middle reach of the Yangtze River, among city clusters, internal and external city clusters and citywide. GeoDa is used to test the overall and local auto-correlation. The results show a growing urbanization and ecological environmental level with coupling degree at antagonistic stage and coordination degree in the transition from preliminary imbalance to preliminary coordination. The overall coordinated degree of middle reach of the Yangtze River is 0.53. Urbanization is continuously rising among the four city clusters, with a fluctuated ecological environmental level. All city clusters are at a preliminary coordination in 2017, except Changsha-Zhuzhou-Xiangtan city cluster whose coordination reaches 0.6, a medium coordination. Both internal and external coordination of city clusters are from 0.57 to 0.62, which is a small gap. Spatial difference exists in coordination and coupling of city wide urbanization and ecological environment, with central cities being of prior-developing advantages. The rising coordination is mainly contributed by state supportive policies, industrial transformation, and local development. Spatial difference of coordination is mainly concentrated in Anhui and Hubei. High-high concentrating area is the eastern Jiang-Huai city cluster, and low-low is almost none. This paper concludes that the coupling coordinated development of urbanization and ecological environment in middle reach of the Yangtze River is growing but relatively low, with regional gaps. There is still a long way to realize the high-quality development.

Key words: urbanization, ecological environment, coupling coordination, middle reach of the Yangtze River