成都平原城市群“三生”空间功能耦合协调的时空演化

Spatial-temporal evolution characteristics of the production-living-ecological spatialfunction coupling coordination in the western Sichuan urban agglomeration

基于“三生”空间理论与耦合协调模型,定量测算2003—2018年成都平原城市群68个区县的“三生”空间功能、耦合度以及耦合协调度,并揭示其时空分布规律。结果表明,成都平原城市群县域生产功能呈“一核、多级、两带”的增长趋势,东部生产功能增长速度高于西部。生活功能高值地区大多分布于研究区中部,且呈以成都市中心城区为核心区域,其他地级市主城区为多级化区域,带动周边地区生活功能整体提升的空间特征。生态功能在空间上呈明显的四周高、中间低,西边高、东边低的空间分布规律;从时序维度可以看出,北部以及西部地区生态功能呈连续上升的态势。成都平原城市群生产、生活与生态空间之间的关联程度整体呈由拮抗到协调耦合的上升趋势,且表现为“从点到面”的空间增幅形态,“三生”空间功能耦合协调度处于波动增长状态,其中轻度失调型阶段增幅最大;“三生”空间功能耦合协调度的演变态势接近于“∩”形的成长曲线。

Based on the production-living-ecological spatial theory and the coupling coordination model,the spatial functions,cou⁃pling degrees,and coupling coordination degrees of the production-living-ecological of 68 districts and counties in the western Sich⁃uan urban agglomeration from 2003 to 2018 were quantitatively measured,and their temporal-spatial distribution pattern were re⁃vealed.The results show that the county-level production function of the western Sichuan urban agglomeration shows"one core,multi⁃ple levels,and two belts"growth trend,and the growth rate of the production function in the east is higher than that in the west.Areas with high living functions are mostly distributed in the middle of the study area,and present the spatial characteristics of Chengdu's central urban area as the core area,and the main urban areas of other prefecture-level cities as multi-level areas,driving the overall improvement of living functions in the surrounding areas.In terms of space,the ecological function presents an obvious spatial distribu⁃tion pattern of high surroundings,low in the middle,high in the west,and low in the east.From the time series dimension,it can be seen that the ecological functions of the northern and western regions have shown a continuous upward trend.The degree of correlation between production,life and ecological space in the western Sichuan urban agglomeration has shown an upward trend from antagonism to coordinated coupling,and it is manifested in the form of spatial increase from"point to surface",and the degree of spatial function coupling and coordination of production-living-ecological.It is in a state of fluctuating growth,with the largest increase in the mildly dysfunctional phase;the evolutionary trend of the degree of coupling and coordination of the production-living-ecological spatial func⁃tion is close to the"∩"-shaped growth curve.