耦合协调度是测度产业、交通、环境三系统协调发展水平的一项重要指标。运用耦合协调模型,研究2006—2016年京津冀产业、交通、环境三系统协调发展关系的变化规律和空间差异特征,结果显示:京津冀产业、交通和环境综合评价值均呈现波动上升的趋势,三者关系极为密切;京津冀"产业—交通—环境"系统耦合协调度虽在个别年份略有下降,但总体表现为稳定增长的状态;在空间特征上,京津冀"产业—交通—环境"系统耦合协调度比较好的城市多分布在北京的"东南"一线;三系统耦合协调度在发展过程中的空间相关性并不显著。此外,对比京津冀、长三角和珠三角三大城市群产业、交通、环境三系统耦合协调度可以发现:研究期内三大城市群呈现出相似的发展趋势和空间分布特征,当前三大城市群"产业—交通—环境"系统耦合协调水平相对较低,均处于勉强协调阶段。由此,可以明确京津冀城市群产业、交通、环境三系统耦合协调发展存在的问题,从而采取有效措施加以改善和提高。
The coupling coordination degree is an important index to measure the coordinated development level of industry, transportation and environment. This paper uses the coupling coordination model to conduct an empirical study on the cooperative development relationship of industry, transportation and environment in Beijing-Tianjin-Hebei from 2006 to 2016. It is found that the industry, transportation and environmental of Beijing-Tianjin-Hebei region show a trend of fluctuation and rise, and the three are closely related. The coupling coordination degree of "industry-transportation-environment" system in Beijing-Tianjin-Hebei region decreases slightly in some years, but the overall performance is stable growth. The regions with good coupling coordination degree are distributed in the "southeast" line of Beijing. There is no spatial correlation in the coordinated development of system coupling. In addition, by comparing the coupling coordination level of the three major urban agglomerations in Beijing-Tianjin-Hebei, Yangtze River Delta and Pearl River Delta, it is found that the three major urban agglomerations show similar development trends and spatial distribution characteristics during the research period, the coupling coordination level of the three major urban agglomeration systems is relatively low, and they are all in the stage of barely coordinated development.