城市化
地理
中国
土地覆盖
比例(比率)
土地利用
分布(数学)
地图学
人口
封面(代数)
城市规划
区域科学
经济地理学
环境资源管理
环境规划
土木工程
生态学
环境科学
工程类
机械工程
数学分析
人口学
考古
数学
社会学
生物
作者
Haojie Cao,Yu Liu,Min Wang,Shiliang Su,Mengjun Kang
标识
DOI:10.1016/j.apgeog.2024.103205
摘要
The monitoring of megaregion boundaries (MBs) is of vital importance for optimizing land use decision-making. However, the morphological structure of megaregions is currently insufficiently identified due to the nontransparent proprietary or inherent deficiency data sources. Thus, this study utilized land cover products integrated with morphological approaches to delineate the evolving trajectories of China's megaregions from 1992 to 2020. Firstly, core areas of megaregions and periphery affected areas were extracted from urban land density maps based on the gravity model and landscape metrics. Secondly, contiguous urban-rural fringes were improved based on the morphological operations and the rank-size distribution. Thirdly, urban land was automatically allocated to megaregions, considering planning policies. Furthermore, three indicators (gross domestic product, population, and land use density) are considered to validate our results, and our extracted MBs show a better understanding than the administrative divisions. The dynamic expansion patterns of twenty identified MBs were captured. As urbanization continues, the boundaries between megaregions become increasingly blurred and eventually merged into large-scale continuous megaregions that extend far beyond administrative divisions. Our study provides valuable insights for megaregion planning, including the effective urban management policies, the role of core cities in each megaregion in terms of radiation and capability.
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