关键词: 城镇群, 三生空间, 一区两群, 格局演变, 驱动力

Abstract: Clarifying the spatial and temporal variations of land use pattern of “production-living-ecological space” in mountainous urban clusters can provide scientific basis for the utilization and rational planning of regional land resources. Based on the pattern of “one district and two clusters” in Chongqing and the remote sensing monitoring data of land use from 2000 to 2020, the dynamic degree model, transfer matrix, kernel density analysis and land use degree index were used to quantitatively analyze the spatial and temporal variations of “production-living-ecological space” land use in each urban cluster from two aspects of quantitative structure and spatial structure. The driving force of “production-living-ecological space” land use change at different temporal scales was analyzed by geographical detector. The results showed that land use change rate of the “production-living-ecological space” of each urban cluster accelerated and that the main urban metropolitan area was mainly converted from agricultural production land to forest ecological land, industrial and mining production land, and urban living land. The urban cluster in the Three Gorges Reservoir area in northeast Chongqing and the urban cluster in Wuling Mountain area in southeast Chongqing were mainly transformed from  agricultural production land to forest ecological land. In the past 20 years, the urban clusters as a whole were in a development period. The high-density area of agricultural production land was mainly distributed in the western part of Chongqing. The high-density core of urban living land was located in the main urban area. The high-density area of forest and grassland ecological land was concentrated in the Three Gorges Reservoir area of northeast Chongqing and the Wuling Mountain area of southeast Chongqing. The change of water area and other ecological lands was relatively stable. Socio-economic factors had a significant impact on land use change of each urban cluster, with population density as the dominant factor. The interaction between factors showed two-factor enhancement or non-linear enhancement. Our results provide reference for land use regulation and policy formulation of “production-living-ecological space” in mountainous areas.

Key words: urban cluster, production-living-ecological space, one district and two clusters, pattern variation, driving force