关键词: 城市, 空间形态, 土地利用效率, 影响机制, 长江中游城市群

Abstract: Study on the impacts of urban spatial morphology on land use efficiency is significant to manage urban spatial morphology and to promote urban land highly efficiently use. This paper uses scenic pattern indicator to measure its sole centrality, fragmentation, irregularity, expansion and concentration of urban spatial morphology in Yangtze Rive middle stream city cluster in 2000, 2005, 2010 and 2018, and to analyze the temporal-spatial evolution of urban spatial morphology, and applies random front production function model to estimate the urban land use efficiency, and employs  FGLS model to test stability of original models via GMM model and to discuss the impacting mechanism of urban spatial morphology on urban land use efficiency. Its urban spatial morphology shows sole centrality, diminishing irregularity, increasing fragmentation, expansion and concentration, suggesting a linearly rising land use efficiency, with most median approaching to quartile, to an outstanding convergence. When cities are expanding, advantages of sole centrality of urban spatial morphology will be decreasing, leading to issues like oversized population, limited resources and environmental pollution. Highly fragmentation will result in fragmented scenes, highly polluted water and reduced ecological servicing, unfavorable for urban land use efficiency. Urban internal blocks show continuous but regular shapes, favorable for decreasing traffic network construction costs, and then promoting the spatial externality of urban land use efficiency. Construction land size can boost urban land use efficiency through producing concentrating effect, economic stimulation and increasing producing capacity, increasing urban spatial concentration can promote interaction among lower levels and reduce resource consumption.

Key words:

urban, spatial morphology, land use efficiency, impacting mechanisms, Yangtze River middle stream city cluster